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ExecuteMalware

2021-05-17 Unknown Malware IOCs

May 17th, 2021
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  1. THREAT IDENTIFICATION: UNKNOWN MALWARE
  2.  
  3. NOTES
  4. Running the executable also drops a .dll and 3 additional (non-executable) files to disk.
  5. Amazingly, the file hash for the .dll appears to have been on VirusTotal since 2009!
  6. There was traffic out to an IP address but all I saw were TCP resets.
  7.  
  8. SUBJECTS OBSERVED
  9. Re: Invoice
  10.  
  11. SENDERS OBSERVED
  12. liz@baptistelectric.com
  13.  
  14. MALDOC FILE HASH
  15. Invoice.iso
  16. b7d01db02b4cc2a8eb206ba19f929d9d
  17.  
  18. UNKNOWN MALWARE FILE HASH
  19. INV.exe
  20. f8273c95045f27e5d6e134b3a549a804
  21.  
  22. Copied and renamed to:
  23. weprasfwjvatm.exe
  24. f8273c95045f27e5d6e134b3a549a804
  25.  
  26. EXTERNAL TRAFFIC
  27. All I saw were TCP reset packets to/from 104.152.188.104
  28.  
  29. ADDITIONAL FILE HASHES
  30. AppData\Local\Temp contains:
  31.  
  32. tambd6oqxct5led0
  33. d3dde1244f9803c4e203358fdb6650e9
  34.  
  35. ynqcndeig
  36. acbd3e7c6c99c4b193f2a1e604bc9976
  37.  
  38. 3bxww6ac1hfs
  39. 96cbec9afc4628836a80fa456b63e5ef
  40.  
  41. Also, in a separate directory under AppData\Local\Temp\:
  42. System.dll
  43. c17103ae9072a06da581dec998343fc1
  44.  
  45. SUPPORTING EVIDENCE
  46. https://www.virustotal.com/gui/file/dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f/detection
  47.  
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