Analysis

  • max time kernel
    145s
  • max time network
    188s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    13-05-2021 12:55

General

  • Target

    63d70b8cabe3b497be9612ddc8de5e0e1c5f8832a28d2bb4c165096f2c5767dd.exe

  • Size

    667KB

  • MD5

    52284a58b470d6357c687091e5844125

  • SHA1

    f4e9af57952c54cff18e91dbc33600ad5a22662a

  • SHA256

    63d70b8cabe3b497be9612ddc8de5e0e1c5f8832a28d2bb4c165096f2c5767dd

  • SHA512

    914ebbe51e00215beda54a13a5412c4cad7aaec67bd93b3dcc62e28a259eb4ccb550ec179fd7b3ddecfcaec8416dd2d7fa0cd221e1b7a3ad696519c27eaabef9

Malware Config

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs
  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\63d70b8cabe3b497be9612ddc8de5e0e1c5f8832a28d2bb4c165096f2c5767dd.exe
    "C:\Users\Admin\AppData\Local\Temp\63d70b8cabe3b497be9612ddc8de5e0e1c5f8832a28d2bb4c165096f2c5767dd.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1852
    • C:\Windows\svchost.exe
      "C:\Windows\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1976

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

4
T1112

Disabling Security Tools

2
T1089

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windows\svchost.exe
    MD5

    52284a58b470d6357c687091e5844125

    SHA1

    f4e9af57952c54cff18e91dbc33600ad5a22662a

    SHA256

    63d70b8cabe3b497be9612ddc8de5e0e1c5f8832a28d2bb4c165096f2c5767dd

    SHA512

    914ebbe51e00215beda54a13a5412c4cad7aaec67bd93b3dcc62e28a259eb4ccb550ec179fd7b3ddecfcaec8416dd2d7fa0cd221e1b7a3ad696519c27eaabef9

  • memory/1852-59-0x0000000075801000-0x0000000075803000-memory.dmp
    Filesize

    8KB

  • memory/1852-60-0x0000000000240000-0x0000000000241000-memory.dmp
    Filesize

    4KB

  • memory/1976-61-0x0000000000000000-mapping.dmp
  • memory/1976-64-0x00000000001D0000-0x00000000001D1000-memory.dmp
    Filesize

    4KB