Analysis

  • max time kernel
    151s
  • max time network
    43s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 23:49

General

  • Target

    f317a59ea553e2fbdeb151cf71b6baf33ab337f61abd2d14abfd06309dca1c4d.exe

  • Size

    541KB

  • MD5

    d4c4ba434338058c59a3086acdb2539e

  • SHA1

    04eef30c111240b5bb1c035e022b60fc31000207

  • SHA256

    f317a59ea553e2fbdeb151cf71b6baf33ab337f61abd2d14abfd06309dca1c4d

  • SHA512

    8800cfa243aa1ec5933680189266ddad4ec6b05f9571f9b150a23ad3bc10e51852b4a0574eb8303724a5caff61aeabb73ad836a299e6b37b8613b98d6b739fa2

Malware Config

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs
  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • Sets file to hidden 1 TTPs

    Modifies file attributes to stop it showing in Explorer etc.

  • UPX packed file 11 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 7 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f317a59ea553e2fbdeb151cf71b6baf33ab337f61abd2d14abfd06309dca1c4d.exe
    "C:\Users\Admin\AppData\Local\Temp\f317a59ea553e2fbdeb151cf71b6baf33ab337f61abd2d14abfd06309dca1c4d.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1296
    • C:\Users\Admin\AppData\Roaming\Gekon.exe
      "C:\Users\Admin\AppData\Roaming\Gekon.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2008
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Roaming\Gekon.exe" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:684
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Roaming\Gekon.exe" +s +h
          4⤵
          • Views/modifies file attributes
          PID:1552
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Roaming" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1668
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Roaming" +s +h
          4⤵
          • Views/modifies file attributes
          PID:1632
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Modifies firewall policy service
        • Modifies security service
        • Executes dropped EXE
        • Windows security modification
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:1136
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
            PID:1948

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Modify Existing Service

    2
    T1031

    Hidden Files and Directories

    2
    T1158

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    7
    T1112

    Disabling Security Tools

    2
    T1089

    Hidden Files and Directories

    2
    T1158

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Gekon.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • C:\Users\Admin\AppData\Roaming\Gekon.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • \Users\Admin\AppData\Roaming\Gekon.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • \Users\Admin\AppData\Roaming\Gekon.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • \Users\Admin\AppData\Roaming\Gekon.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • \Users\Admin\AppData\Roaming\Gekon.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • \Users\Admin\AppData\Roaming\Gekon.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • \Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • \Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      252KB

      MD5

      200dccea6b2e072fa47842830aaf7754

      SHA1

      d07d57e782daf0b71e521257ef28d5ba69ebc6e2

      SHA256

      10e3f01bedd5fbc7a01c9864085557105ee43e8f0c05c98ea06c6d1f53f5f013

      SHA512

      87ca099a8b941063966cf13eb86a354e56f4166a080c1c0bd24b1e999db65e661c617bd666749e6c3fe198a7eb0d098f4160ce742a31cdcbbeda2341d12e52be

    • memory/684-64-0x0000000000000000-mapping.dmp
    • memory/1136-70-0x0000000000000000-mapping.dmp
    • memory/1296-54-0x0000000074F21000-0x0000000074F23000-memory.dmp
      Filesize

      8KB

    • memory/1552-66-0x0000000000000000-mapping.dmp
    • memory/1632-67-0x0000000000000000-mapping.dmp
    • memory/1668-65-0x0000000000000000-mapping.dmp
    • memory/1948-74-0x0000000000000000-mapping.dmp
    • memory/2008-60-0x0000000000000000-mapping.dmp