Analysis

  • max time kernel
    4294217s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7-20220223-en
  • submitted
    07-03-2022 11:07

General

  • Target

    ed2538ba3fdaff85cbb11894c32ec8e1d46049c89b44f9cb823d383c79df54b0.exe

  • Size

    1.8MB

  • MD5

    2ffbb53eb0913f749d8ffd248c34dd9f

  • SHA1

    d0d27fce8b392b69a296109e70d53eeec3ea1dfc

  • SHA256

    ed2538ba3fdaff85cbb11894c32ec8e1d46049c89b44f9cb823d383c79df54b0

  • SHA512

    c21308ad4a8cb2179c4f2e8105a5a552143f70f8a15cd3095803ee3b951a649373a71c6725337028757d8a6191961d028ff1f3ee9e3958e39eed49889e0ec067

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

eriqmallamlaml.duckdns.org:1604

Mutex

DC_MUTEX-EKSW656

Attributes
  • InstallPath

    svchost.exe

  • gencode

    9epU0FMovytS

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    svchost

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • Windows security bypass 2 TTPs
  • Executes dropped EXE 4 IoCs
  • Sets file to hidden 1 TTPs

    Modifies file attributes to stop it showing in Explorer etc.

  • UPX packed file 8 IoCs

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

  • Loads dropped DLL 8 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 4 IoCs
  • Suspicious use of SetThreadContext 1 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 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ed2538ba3fdaff85cbb11894c32ec8e1d46049c89b44f9cb823d383c79df54b0.exe
    "C:\Users\Admin\AppData\Local\Temp\ed2538ba3fdaff85cbb11894c32ec8e1d46049c89b44f9cb823d383c79df54b0.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1952
    • C:\Users\Admin\AppData\Local\Temp\YouTubeDirector2.exe
      "C:\Users\Admin\AppData\Local\Temp\YouTubeDirector2.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:268
      • C:\Users\Admin\AppData\Roaming\APP\svchosts.exe
        "C:\Users\Admin\AppData\Roaming\APP\svchosts.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:620
    • C:\Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.exe
      "C:\Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.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:2004
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.exe" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1384
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.exe" +s +h
          4⤵
          • Views/modifies file attributes
          PID:1672
      • 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:1380
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Views/modifies file attributes
          PID:1048
      • C:\Windows\SysWOW64\9epU0FMovytS\svchost.exe
        "C:\Windows\system32\9epU0FMovytS\svchost.exe"
        3⤵
        • Modifies security service
        • Executes dropped EXE
        • Windows security modification
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1820
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
          4⤵
          • Modifies security service
          • Adds Run key to start application
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:996
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:992
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 992 -s 264
              6⤵
              • Program crash
              PID:1412

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Hidden Files and Directories

2
T1158

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

5
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\Local\Temp\YouTubeDirector2.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • C:\Users\Admin\AppData\Local\Temp\YouTubeDirector2.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • C:\Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • C:\Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • C:\Users\Admin\AppData\Roaming\APP\svchosts.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • C:\Users\Admin\AppData\Roaming\APP\svchosts.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • C:\Windows\SysWOW64\9epU0FMovytS\svchost.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • C:\Windows\SysWOW64\9epU0FMovytS\svchost.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • \Users\Admin\AppData\Local\Temp\YouTubeDirector2.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • \Users\Admin\AppData\Local\Temp\YouTubeDirector2.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • \Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • \Users\Admin\AppData\Local\Temp\YouTubeUrlDirector.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • \Users\Admin\AppData\Roaming\APP\svchosts.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • \Users\Admin\AppData\Roaming\APP\svchosts.exe
    MD5

    d9dd2b842d717b9aa8fad033003035d4

    SHA1

    8b67a072188d7d15e306f25c23056fa0ac8c5fd2

    SHA256

    d5986aa38791dd0f540e0516c639c9f83655f091b04c223e2670c2c40808faaf

    SHA512

    4b035a9e12d35caed99ab8c494cde521146dbaa723a0e0c1e3101db2975344e9cc8f8541029a85207030c090907951896b39b9855f24d84eb13742b9a072537b

  • \Windows\SysWOW64\9epU0FMovytS\svchost.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • \Windows\SysWOW64\9epU0FMovytS\svchost.exe
    MD5

    1c2ea4ad5b316200fe3b7d434c815cfd

    SHA1

    015642d4e98117d612959ce4593a4b5bb8a4ac2d

    SHA256

    40be24df080430231b0dd0be73477b10b0946e7887b8083c677d3fabe91fffd7

    SHA512

    42a1dc29296cb7b112cc4b99c881fb274cc8772b5e2db851afa6a395217e27735d3b2639a2e7c39de1edb99a07dc689c7b22cfbda478082acf35d9de73196e70

  • memory/268-62-0x0000000075641000-0x0000000075643000-memory.dmp
    Filesize

    8KB

  • memory/268-73-0x0000000000240000-0x0000000000241000-memory.dmp
    Filesize

    4KB

  • memory/620-74-0x0000000000250000-0x0000000000251000-memory.dmp
    Filesize

    4KB

  • memory/992-81-0x0000000000080000-0x0000000000081000-memory.dmp
    Filesize

    4KB

  • memory/1820-79-0x00000000001D0000-0x00000000001D1000-memory.dmp
    Filesize

    4KB

  • memory/1952-54-0x00000000001C0000-0x00000000001F4000-memory.dmp
    Filesize

    208KB

  • memory/1952-55-0x00000000741C0000-0x00000000748AE000-memory.dmp
    Filesize

    6.9MB

  • memory/1952-56-0x0000000004F00000-0x0000000004F01000-memory.dmp
    Filesize

    4KB

  • memory/2004-72-0x00000000003C0000-0x00000000003C1000-memory.dmp
    Filesize

    4KB