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remcos_sfc_exe_2019-08-21_11_55.txt

paladin316
Aug 21st, 2019
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  1.  
  2. * MalFamily: "Remcos"
  3.  
  4. * MalScore: 10.0
  5.  
  6. * File Name: "sfc.exe"
  7. * File Size: 1179144
  8. * File Type: "PE32 executable (GUI) Intel 80386, for MS Windows"
  9. * SHA256: "45b3e49b367f59f6bfa4370d4742a2bcc9d07a03c944308574fb93446c1d9baf"
  10. * MD5: "65753975d115fae25f35fb9deb2cddbb"
  11. * SHA1: "6df8c7162ae1393ad7fc07d23fc9b724a4bcdb91"
  12. * SHA512: "5728aeb822905991132acf923e0e1d19196ffc6ddb4498bdd6c8178f0b47fb179726f177eb44817c5fe658f7c5edbbf4ef0903b35b79b2faae44ce42c8c90f0c"
  13. * CRC32: "D569CBD0"
  14. * SSDEEP: "24576:yAHnh+eWsN3skA4RV1Hom2KXMmHaLIahgxY3b5T:1h+ZkldoPK8YaLDNT"
  15.  
  16. * Process Execution:
  17. "sfc.exe",
  18. "sfc.exe",
  19. "wscript.exe",
  20. "cmd.exe",
  21. "remcos.exe",
  22. "remcos.exe",
  23. "svchost.exe",
  24. "svchost.exe",
  25. "svchost.exe",
  26. "svchost.exe",
  27. "svchost.exe",
  28. "svchost.exe",
  29. "svchost.exe",
  30. "svchost.exe",
  31. "svchost.exe",
  32. "svchost.exe",
  33. "svchost.exe",
  34. "svchost.exe",
  35. "svchost.exe",
  36. "svchost.exe",
  37. "svchost.exe",
  38. "svchost.exe",
  39. "svchost.exe",
  40. "svchost.exe",
  41. "svchost.exe",
  42. "svchost.exe",
  43. "svchost.exe",
  44. "svchost.exe",
  45. "svchost.exe",
  46. "svchost.exe",
  47. "svchost.exe",
  48. "schtasks.exe",
  49. "schtasks.exe",
  50. "svchost.exe"
  51.  
  52.  
  53. * Executed Commands:
  54. "\"C:\\Windows\\SysWOW64\\schtasks.exe\" /create /tn setx /tr \"C:\\Users\\user\\AppData\\Roaming\\CapabilityAccessHandlers\\sfc.exe\" /sc minute /mo 1 /F",
  55. "schtasks /create /tn setx /tr \"C:\\Users\\user\\AppData\\Roaming\\CapabilityAccessHandlers\\sfc.exe\" /sc minute /mo 1 /F",
  56. "\"C:\\Windows\\System32\\WScript.exe\" \"C:\\Users\\user\\AppData\\Local\\Temp\\install.vbs\"",
  57. "C:\\Users\\user\\AppData\\Local\\Temp\\install.vbs ",
  58. "\"C:\\Windows\\System32\\cmd.exe\" /c \"C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe\"",
  59. "cmd /c \"C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe\"",
  60. "C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe",
  61. "C:\\Windows\\SysWOW64\\svchost.exe"
  62.  
  63.  
  64. * Signatures Detected:
  65.  
  66. "Description": "Creates RWX memory",
  67. "Details":
  68.  
  69.  
  70. "Description": "Possible date expiration check, exits too soon after checking local time",
  71. "Details":
  72.  
  73. "process": "schtasks.exe, PID 2924"
  74.  
  75.  
  76.  
  77.  
  78. "Description": "Detected script timer window indicative of sleep style evasion",
  79. "Details":
  80.  
  81. "Window": "WSH-Timer"
  82.  
  83.  
  84.  
  85.  
  86. "Description": "Reads data out of its own binary image",
  87. "Details":
  88.  
  89. "self_read": "process: sfc.exe, pid: 2392, offset: 0x00000000, length: 0x0011fe08"
  90.  
  91.  
  92. "self_read": "process: wscript.exe, pid: 2096, offset: 0x00000000, length: 0x00000040"
  93.  
  94.  
  95. "self_read": "process: wscript.exe, pid: 2096, offset: 0x000000f0, length: 0x00000018"
  96.  
  97.  
  98. "self_read": "process: wscript.exe, pid: 2096, offset: 0x000001e8, length: 0x00000078"
  99.  
  100.  
  101. "self_read": "process: wscript.exe, pid: 2096, offset: 0x00018000, length: 0x00000020"
  102.  
  103.  
  104. "self_read": "process: wscript.exe, pid: 2096, offset: 0x00018058, length: 0x00000018"
  105.  
  106.  
  107. "self_read": "process: wscript.exe, pid: 2096, offset: 0x000181a8, length: 0x00000018"
  108.  
  109.  
  110. "self_read": "process: wscript.exe, pid: 2096, offset: 0x00018470, length: 0x00000010"
  111.  
  112.  
  113. "self_read": "process: wscript.exe, pid: 2096, offset: 0x00018640, length: 0x00000012"
  114.  
  115.  
  116. "self_read": "process: remcos.exe, pid: 2368, offset: 0x00000000, length: 0x0011fe08"
  117.  
  118.  
  119. "self_read": "process: remcos.exe, pid: 2656, offset: 0x00000000, length: 0x0011fe08"
  120.  
  121.  
  122.  
  123.  
  124. "Description": "A process created a hidden window",
  125. "Details":
  126.  
  127. "Process": "sfc.exe -> schtasks"
  128.  
  129.  
  130. "Process": "sfc.exe -> C:\\Users\\user\\AppData\\Local\\Temp\\install.vbs"
  131.  
  132.  
  133. "Process": "wscript.exe -> cmd"
  134.  
  135.  
  136. "Process": "remcos.exe -> schtasks"
  137.  
  138.  
  139.  
  140.  
  141. "Description": "Drops a binary and executes it",
  142. "Details":
  143.  
  144. "binary": "C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe"
  145.  
  146.  
  147.  
  148.  
  149. "Description": "Executed a process and injected code into it, probably while unpacking",
  150. "Details":
  151.  
  152. "Injection": "sfc.exe(2392) -> sfc.exe(2852)"
  153.  
  154.  
  155.  
  156.  
  157. "Description": "Sniffs keystrokes",
  158. "Details":
  159.  
  160. "SetWindowsHookExA": "Process: remcos.exe(2656)"
  161.  
  162.  
  163.  
  164.  
  165. "Description": "A process attempted to delay the analysis task by a long amount of time.",
  166. "Details":
  167.  
  168. "Process": "remcos.exe tried to sleep 2349 seconds, actually delayed analysis time by 0 seconds"
  169.  
  170.  
  171.  
  172.  
  173. "Description": "Attempts to execute a Living Off The Land Binary command for post exeploitation",
  174. "Details":
  175.  
  176. "MITRE T1078 - schtask": "(Tactic: Execution, Persistence, Privilege Escalation)"
  177.  
  178.  
  179.  
  180.  
  181. "Description": "Installs itself for autorun at Windows startup",
  182. "Details":
  183.  
  184. "key": "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\remcos"
  185.  
  186.  
  187. "data": "\"C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe\""
  188.  
  189.  
  190. "key": "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Run\\remcos"
  191.  
  192.  
  193. "data": "\"C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe\""
  194.  
  195.  
  196. "task": "\"C:\\Windows\\SysWOW64\\schtasks.exe\" /create /tn setx /tr \"C:\\Users\\user\\AppData\\Roaming\\CapabilityAccessHandlers\\sfc.exe\" /sc minute /mo 1 /F"
  197.  
  198.  
  199.  
  200.  
  201. "Description": "Creates a hidden or system file",
  202. "Details":
  203.  
  204. "file": "C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe"
  205.  
  206.  
  207. "file": "C:\\Users\\user\\AppData\\Roaming\\remcos"
  208.  
  209.  
  210. "file": "C:\\Users\\user\\AppData\\Roaming\\remcos\\logs.dat"
  211.  
  212.  
  213.  
  214.  
  215. "Description": "Clamav Hits in Target/Dropped/SuriExtracted",
  216. "Details":
  217.  
  218. "target": "clamav:Win.Malware.Autoit-6985962-0, sha256:45b3e49b367f59f6bfa4370d4742a2bcc9d07a03c944308574fb93446c1d9baf, type:PE32 executable (GUI) Intel 80386, for MS Windows"
  219.  
  220.  
  221. "dropped": "clamav:Win.Malware.Autoit-6985962-0, sha256:45b3e49b367f59f6bfa4370d4742a2bcc9d07a03c944308574fb93446c1d9baf , guest_paths:C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe, type:PE32 executable (GUI) Intel 80386, for MS Windows"
  222.  
  223.  
  224. "dropped": "clamav:Win.Malware.Autoit-6985962-0, sha256:652b0d7687a33644bbfd262288023e9462eced779d97a565b38bafd88e2ed7a6 , guest_paths:C:\\Users\\user\\AppData\\Roaming\\CapabilityAccessHandlers\\sfc.exe, type:PE32 executable (GUI) Intel 80386, for MS Windows"
  225.  
  226.  
  227.  
  228.  
  229. "Description": "Creates a copy of itself",
  230. "Details":
  231.  
  232. "copy": "C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe"
  233.  
  234.  
  235.  
  236.  
  237. "Description": "Creates a slightly modified copy of itself",
  238. "Details":
  239.  
  240. "file": "C:\\Users\\user\\AppData\\Roaming\\CapabilityAccessHandlers\\sfc.exe"
  241.  
  242.  
  243. "percent_match": 99
  244.  
  245.  
  246.  
  247.  
  248. "Description": "Anomalous binary characteristics",
  249. "Details":
  250.  
  251. "anomaly": "Actual checksum does not match that reported in PE header"
  252.  
  253.  
  254.  
  255.  
  256. "Description": "Clears web history",
  257. "Details":
  258.  
  259. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\index.dat"
  260.  
  261.  
  262. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  263.  
  264.  
  265. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  266.  
  267.  
  268. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  269.  
  270.  
  271. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  272.  
  273.  
  274. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\Low"
  275.  
  276.  
  277. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  278.  
  279.  
  280. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  281.  
  282.  
  283. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  284.  
  285.  
  286. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  287.  
  288.  
  289. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  290.  
  291.  
  292. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  293.  
  294.  
  295. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  296.  
  297.  
  298. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  299.  
  300.  
  301. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\Low\\index.dat"
  302.  
  303.  
  304. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  305.  
  306.  
  307. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  308.  
  309.  
  310. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  311.  
  312.  
  313. "file": "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]"
  314.  
  315.  
  316.  
  317.  
  318.  
  319. * Started Service:
  320.  
  321. * Mutexes:
  322. "MDMAppInstaller",
  323. "Local\\ZoneAttributeCacheCounterMutex",
  324. "Local\\ZonesCacheCounterMutex",
  325. "Local\\ZonesLockedCacheCounterMutex",
  326. "Remcos_Mutex_Inj",
  327. "Remcos-S1KNPZ",
  328. "Mutex_RemWatchdog"
  329.  
  330.  
  331. * Modified Files:
  332. "C:\\Users\\user\\AppData\\Roaming\\CapabilityAccessHandlers\\sfc.exe",
  333. "C:\\Users\\user\\AppData\\Roaming\\remcos\\remcos.exe",
  334. "C:\\Users\\user\\AppData\\Local\\Temp\\install.vbs",
  335. "C:\\Windows\\sysnative\\Tasks\\setx",
  336. "\\Device\\LanmanDatagramReceiver",
  337. "C:\\Windows\\appcompat\\Programs\\RecentFileCache.bcf",
  338. "\\??\\PIPE\\srvsvc",
  339. "C:\\Users\\user\\AppData\\Roaming\\remcos\\logs.dat"
  340.  
  341.  
  342. * Deleted Files:
  343. "C:\\Windows\\Tasks\\setx.job",
  344. "C:\\Users\\user\\AppData\\Local\\Temp\\install.vbs",
  345. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\index.dat",
  346. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\Low\\index.dat",
  347. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\Low",
  348. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  349. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  350. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  351. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  352. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  353. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  354. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  355. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  356. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  357. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  358. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  359. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  360. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  361. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  362. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  363. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\[email protected]",
  364. "C:\\Users\\user\\AppData\\Roaming\\Microsoft\\Windows\\Cookies",
  365. "C:\\Users\\user\\AppData\\Local\\Google\\Chrome\\User Data\\Default\\Cookies",
  366. "C:\\Users\\user\\AppData\\Local\\Google\\Chrome\\User Data\\Default\\Login Data"
  367.  
  368.  
  369. * Modified Registry Keys:
  370. "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\UNCAsIntranet",
  371. "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\AutoDetect",
  372. "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\remcos",
  373. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Run\\remcos",
  374. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tasks\\0A6B36FC-0DD8-4760-B3E8-E3F0BB7FC89E\\Path",
  375. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tasks\\0A6B36FC-0DD8-4760-B3E8-E3F0BB7FC89E\\Hash",
  376. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tree\\setx\\Id",
  377. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tree\\setx\\Index",
  378. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tasks\\0A6B36FC-0DD8-4760-B3E8-E3F0BB7FC89E\\Triggers",
  379. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tasks\\0A6B36FC-0DD8-4760-B3E8-E3F0BB7FC89E\\DynamicInfo",
  380. "HKEY_CURRENT_USER\\Software\\Remcos-S1KNPZ\\",
  381. "HKEY_CURRENT_USER\\Software\\Remcos-S1KNPZ\\exepath",
  382. "HKEY_CURRENT_USER\\Software\\Remcos-S1KNPZ\\licence",
  383. "HKEY_CURRENT_USER\\Software\\Remcos-S1KNPZ\\WD",
  384. "HKEY_CURRENT_USER\\Software\\Remcos-S1KNPZ\\FR"
  385.  
  386.  
  387. * Deleted Registry Keys:
  388. "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\ProxyBypass",
  389. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\ProxyBypass",
  390. "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\IntranetName",
  391. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\IntranetName",
  392. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\CompatibilityAdapter\\Signatures\\setx.job",
  393. "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\CompatibilityAdapter\\Signatures\\setx.job.fp"
  394.  
  395.  
  396. * DNS Communications:
  397.  
  398. "type": "A",
  399. "request": "daya4659.ddns.net",
  400. "answers":
  401.  
  402.  
  403.  
  404. * Domains:
  405.  
  406. "ip": "",
  407. "domain": "daya4659.ddns.net"
  408.  
  409.  
  410.  
  411. * Network Communication - ICMP:
  412.  
  413. * Network Communication - HTTP:
  414.  
  415. * Network Communication - SMTP:
  416.  
  417. * Network Communication - Hosts:
  418.  
  419. * Network Communication - IRC:
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