Analysis

  • max time kernel
    151s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-07-2022 13:39

General

  • Target

    9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905.exe

  • Size

    337KB

  • MD5

    4f8e31356bf04b080c5ba8e47756c50f

  • SHA1

    3b5eb07249e213865f1f0f4e779b2db126346c2b

  • SHA256

    9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905

  • SHA512

    2c93d7ffad05bea58635a2445aab9b2a5d050b41c7c940bf74a066b2f4db8e4ecda110c7145a7b7de98904b40f3e8251d9a142cc1aaf4308c653aec26759a71f

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

globalgarus.bounceme.net:5552

Mutex

DC_MUTEX-1A53RNC

Attributes
  • InstallPath

    MSDCSC\testinform.exe

  • gencode

    qQc4wjtBrTS4

  • 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
  • Modifies firewall policy service 2 TTPs 6 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • Ramnit

    Ramnit is a versatile family that holds viruses, worms, and Trojans.

  • Windows security bypass 2 TTPs 4 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Executes dropped EXE 7 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    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.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 40 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SetWindowsHookEx 15 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905.exe
    "C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2816
    • C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905Srv.exe
      C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905Srv.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4760
      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:676
        • C:\Program Files\Internet Explorer\iexplore.exe
          "C:\Program Files\Internet Explorer\iexplore.exe"
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4248
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4248 CREDAT:17410 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:2896
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4248 CREDAT:82948 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:4016
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4248 CREDAT:17412 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:1820
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:872
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:4896
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2940
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:4616
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
        PID:520
      • C:\Users\Admin\Documents\MSDCSC\testinform.exe
        "C:\Users\Admin\Documents\MSDCSC\testinform.exe"
        2⤵
        • Modifies firewall policy service
        • Modifies security service
        • Windows security bypass
        • Disables RegEdit via registry modification
        • Executes dropped EXE
        • Windows security modification
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:4228
        • C:\Users\Admin\Documents\MSDCSC\testinformSrv.exe
          C:\Users\Admin\Documents\MSDCSC\testinformSrv.exe
          3⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious use of WriteProcessMemory
          PID:2168
          • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
            "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:1648
            • C:\Program Files\Internet Explorer\iexplore.exe
              "C:\Program Files\Internet Explorer\iexplore.exe"
              5⤵
              • Modifies Internet Explorer settings
              PID:212
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
          3⤵
          • Modifies firewall policy service
          • Modifies security service
          • Windows security bypass
          • Disables RegEdit via registry modification
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:3380
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            4⤵
              PID:4644
      • C:\Program Files (x86)\Internet Explorer\iexploreSrv.exe
        "C:\Program Files (x86)\Internet Explorer\iexploreSrv.exe"
        1⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        PID:1636
        • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
          "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
          2⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:2828
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe"
        1⤵
        • Modifies Internet Explorer settings
        PID:4352

      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

      8
      T1112

      Disabling Security Tools

      2
      T1089

      Hidden Files and Directories

      2
      T1158

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\Internet Explorer\iexploreSrv.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Program Files (x86)\Internet Explorer\iexploreSrv.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905Srv.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • C:\Users\Admin\AppData\Local\Temp\9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905Srv.exe
        Filesize

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

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

        337KB

        MD5

        4f8e31356bf04b080c5ba8e47756c50f

        SHA1

        3b5eb07249e213865f1f0f4e779b2db126346c2b

        SHA256

        9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905

        SHA512

        2c93d7ffad05bea58635a2445aab9b2a5d050b41c7c940bf74a066b2f4db8e4ecda110c7145a7b7de98904b40f3e8251d9a142cc1aaf4308c653aec26759a71f

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

        337KB

        MD5

        4f8e31356bf04b080c5ba8e47756c50f

        SHA1

        3b5eb07249e213865f1f0f4e779b2db126346c2b

        SHA256

        9b82aa17d4bf5cbeb90702eb219fc0c845abfe8a4e00826d67ac60f6129f9905

        SHA512

        2c93d7ffad05bea58635a2445aab9b2a5d050b41c7c940bf74a066b2f4db8e4ecda110c7145a7b7de98904b40f3e8251d9a142cc1aaf4308c653aec26759a71f

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

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

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

        52KB

        MD5

        17efb7e40d4cadaf3a4369435a8772ec

        SHA1

        eb9302063ac2ab599ae93aaa1e45b88bbeacbca2

        SHA256

        f515564b67efd06fa42f57532feafc49d40b0fc36c5d4935300dd55416f0a386

        SHA512

        522fba06304950860fa9aa8933b12b9323dea47dbda363db3f57535396c156c4cf6934a9db38fff8c77503fcb889d030fadb639094a1f34bbad54c79c8734450

      • memory/520-143-0x0000000000000000-mapping.dmp
      • memory/676-139-0x0000000000400000-0x0000000000413000-memory.dmp
        Filesize

        76KB

      • memory/676-134-0x0000000000000000-mapping.dmp
      • memory/872-141-0x0000000000000000-mapping.dmp
      • memory/1636-167-0x0000000000400000-0x0000000000413000-memory.dmp
        Filesize

        76KB

      • memory/1636-157-0x0000000000000000-mapping.dmp
      • memory/1648-155-0x0000000000000000-mapping.dmp
      • memory/2168-149-0x0000000000000000-mapping.dmp
      • memory/2168-154-0x0000000000400000-0x0000000000413000-memory.dmp
        Filesize

        76KB

      • memory/2816-140-0x0000000000400000-0x00000000004D5000-memory.dmp
        Filesize

        852KB

      • memory/2816-170-0x0000000000400000-0x00000000004D5000-memory.dmp
        Filesize

        852KB

      • memory/2828-165-0x0000000000000000-mapping.dmp
      • memory/2940-142-0x0000000000000000-mapping.dmp
      • memory/4228-152-0x0000000000400000-0x00000000004D5000-memory.dmp
        Filesize

        852KB

      • memory/4228-159-0x0000000000400000-0x00000000004D5000-memory.dmp
        Filesize

        852KB

      • memory/4228-146-0x0000000000000000-mapping.dmp
      • memory/4616-145-0x0000000000000000-mapping.dmp
      • memory/4644-163-0x0000000000000000-mapping.dmp
      • memory/4760-130-0x0000000000000000-mapping.dmp
      • memory/4760-137-0x0000000000400000-0x0000000000413000-memory.dmp
        Filesize

        76KB

      • memory/4760-133-0x0000000000400000-0x0000000000413000-memory.dmp
        Filesize

        76KB

      • memory/4896-144-0x0000000000000000-mapping.dmp