Analysis

  • max time kernel
    151s
  • max time network
    42s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2022 22:57

General

  • Target

    9a3fbbcf01c2f50da1652108b7d26b020f73b1946b25e2d5637813a226b81c68.exe

  • Size

    2.1MB

  • MD5

    5392288f58739141bc319d5d9b38a677

  • SHA1

    acc64f222ee3ab0465d4eecc0e06dcb6f9c8c00c

  • SHA256

    9a3fbbcf01c2f50da1652108b7d26b020f73b1946b25e2d5637813a226b81c68

  • SHA512

    a50e71b104c2ce883a2b9827edc4b0c2012277e28ca0262afbf54ab42323d72f21c71c8b4fbcaac2687f59591d013e13e7e11dc15e3e801ef658972e52a5dceb

  • SSDEEP

    49152:0bQDgok30mycUPTVxbBvWOsnCoV3UtzDI9:0bQU/NUPTlvWOIcxDy

Malware Config

Extracted

Family

darkcomet

Botnet

FaceChat

C2

jebozovan.no-ip.org:81

Mutex

DC_MUTEX-VYZAE9V

Attributes
  • InstallPath

    Updater\svchost.exe

  • gencode

    7gYDkFuVmVLg

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 9 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a3fbbcf01c2f50da1652108b7d26b020f73b1946b25e2d5637813a226b81c68.exe
    "C:\Users\Admin\AppData\Local\Temp\9a3fbbcf01c2f50da1652108b7d26b020f73b1946b25e2d5637813a226b81c68.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1256
    • C:\Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE
      "C:\Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2040
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:952
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:664
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1932
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:1372
      • C:\Windows\SysWOW64\Updater\svchost.exe
        "C:\Windows\system32\Updater\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:972
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
            PID:1012
      • C:\Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE
        "C:\Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE"
        2⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:1620
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1620 -s 148
          3⤵
          • Loads dropped DLL
          • Program crash
          PID:1568

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Hidden Files and Directories

    2
    T1158

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    2
    T1112

    Hidden Files and Directories

    2
    T1158

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • C:\Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • C:\Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE
      Filesize

      1.3MB

      MD5

      daebd0ad2572c700bbd224c0d6c0956e

      SHA1

      27d6a99830178867a79c3f3eafea6ec897aac3da

      SHA256

      4caba5ef8a1d039d09da5e20aafc12b8a2d44563f4302946b9e510d76a1fd0c1

      SHA512

      d0c347e29cfeec1a6bcd9839b321322983dc0c53ce52eeb85332296f587a2600beb1ead2de3d81834e5ad72aca9abfda3b3ef58d01c94899ff9a31bec09fdb97

    • C:\Windows\SysWOW64\Updater\svchost.exe
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • C:\Windows\SysWOW64\Updater\svchost.exe
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • \Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • \Users\Admin\AppData\Local\Temp\FACEBOOK CHAT @DESKTOP.EXE
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • \Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE
      Filesize

      1.3MB

      MD5

      daebd0ad2572c700bbd224c0d6c0956e

      SHA1

      27d6a99830178867a79c3f3eafea6ec897aac3da

      SHA256

      4caba5ef8a1d039d09da5e20aafc12b8a2d44563f4302946b9e510d76a1fd0c1

      SHA512

      d0c347e29cfeec1a6bcd9839b321322983dc0c53ce52eeb85332296f587a2600beb1ead2de3d81834e5ad72aca9abfda3b3ef58d01c94899ff9a31bec09fdb97

    • \Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE
      Filesize

      1.3MB

      MD5

      daebd0ad2572c700bbd224c0d6c0956e

      SHA1

      27d6a99830178867a79c3f3eafea6ec897aac3da

      SHA256

      4caba5ef8a1d039d09da5e20aafc12b8a2d44563f4302946b9e510d76a1fd0c1

      SHA512

      d0c347e29cfeec1a6bcd9839b321322983dc0c53ce52eeb85332296f587a2600beb1ead2de3d81834e5ad72aca9abfda3b3ef58d01c94899ff9a31bec09fdb97

    • \Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE
      Filesize

      1.3MB

      MD5

      daebd0ad2572c700bbd224c0d6c0956e

      SHA1

      27d6a99830178867a79c3f3eafea6ec897aac3da

      SHA256

      4caba5ef8a1d039d09da5e20aafc12b8a2d44563f4302946b9e510d76a1fd0c1

      SHA512

      d0c347e29cfeec1a6bcd9839b321322983dc0c53ce52eeb85332296f587a2600beb1ead2de3d81834e5ad72aca9abfda3b3ef58d01c94899ff9a31bec09fdb97

    • \Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE
      Filesize

      1.3MB

      MD5

      daebd0ad2572c700bbd224c0d6c0956e

      SHA1

      27d6a99830178867a79c3f3eafea6ec897aac3da

      SHA256

      4caba5ef8a1d039d09da5e20aafc12b8a2d44563f4302946b9e510d76a1fd0c1

      SHA512

      d0c347e29cfeec1a6bcd9839b321322983dc0c53ce52eeb85332296f587a2600beb1ead2de3d81834e5ad72aca9abfda3b3ef58d01c94899ff9a31bec09fdb97

    • \Users\Admin\AppData\Local\Temp\FACEBOOKCHATDESKTOP.EXE
      Filesize

      1.3MB

      MD5

      daebd0ad2572c700bbd224c0d6c0956e

      SHA1

      27d6a99830178867a79c3f3eafea6ec897aac3da

      SHA256

      4caba5ef8a1d039d09da5e20aafc12b8a2d44563f4302946b9e510d76a1fd0c1

      SHA512

      d0c347e29cfeec1a6bcd9839b321322983dc0c53ce52eeb85332296f587a2600beb1ead2de3d81834e5ad72aca9abfda3b3ef58d01c94899ff9a31bec09fdb97

    • \Windows\SysWOW64\Updater\svchost.exe
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • \Windows\SysWOW64\Updater\svchost.exe
      Filesize

      658KB

      MD5

      c1f9cae3ba55deb1c0154eedc12aa8e8

      SHA1

      b53b0ce88c9f93bce003364792318da9463af2b7

      SHA256

      628d872cead2637157a26d5d7d976db5a4b407d8594abd825e71da6679466f18

      SHA512

      50310ec5674b88a1b18585cd107b4c25a8733e238d449547d1bdb0a87e412777333f1b8da343dc9f836fa29fe9e0065841b2500bb9d36e0f5a004bb7cc716464

    • memory/664-72-0x0000000000000000-mapping.dmp
    • memory/952-69-0x0000000000000000-mapping.dmp
    • memory/972-76-0x0000000000000000-mapping.dmp
    • memory/1012-80-0x0000000000000000-mapping.dmp
    • memory/1256-54-0x0000000075C61000-0x0000000075C63000-memory.dmp
      Filesize

      8KB

    • memory/1372-71-0x0000000000000000-mapping.dmp
    • memory/1568-64-0x0000000000000000-mapping.dmp
    • memory/1620-60-0x0000000000000000-mapping.dmp
    • memory/1932-70-0x0000000000000000-mapping.dmp
    • memory/2040-57-0x0000000000000000-mapping.dmp