Analysis

  • max time kernel
    156s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 12:37

General

  • Target

    62495c2cfde10b47d1c2cc907822fec4ca4f8b6e51c9216cf1dfdcc454c8a8d5.exe

  • Size

    762KB

  • MD5

    acaedef2c694bd1d58f4cb82ffb6318b

  • SHA1

    316f234a5571b199a7d948f541ad3982536c033a

  • SHA256

    62495c2cfde10b47d1c2cc907822fec4ca4f8b6e51c9216cf1dfdcc454c8a8d5

  • SHA512

    82f718bc54003f0537e7923285ed6d3188e458301f95029d0d273660f643755af5d2654f9acc4f23dd62e8fb15b0e114c308b7cf4dfbd673579f4f1d5b804513

Malware Config

Extracted

Family

darkcomet

Botnet

×èòåð

C2

62.33.2.50:1111

happycraft.hopto.org:1111

Mutex

DC_MUTEX-1BX3PA1

Attributes
  • InstallPath

    temp\java.exe

  • gencode

    6hPE8cPj7vE4

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    java.exe

Extracted

Family

njrat

Version

im523

Botnet

HacKed

C2

62.33.2.50:2222

Mutex

41aabe8f8c6d7c53ac94c0ce4c6ce249

Attributes
  • reg_key

    41aabe8f8c6d7c53ac94c0ce4c6ce249

  • splitter

    |'|'|

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
  • Windows security bypass 2 TTPs
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 6 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets file to hidden 1 TTPs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Drops startup file 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops autorun.inf file 1 TTPs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 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\62495c2cfde10b47d1c2cc907822fec4ca4f8b6e51c9216cf1dfdcc454c8a8d5.exe
    "C:\Users\Admin\AppData\Local\Temp\62495c2cfde10b47d1c2cc907822fec4ca4f8b6e51c9216cf1dfdcc454c8a8d5.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3572
    • C:\Users\Admin\AppData\Local\Temp\2.exe
      "C:\Users\Admin\AppData\Local\Temp\2.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2148
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\2.exe" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:976
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\2.exe" +s +h
          4⤵
          • Views/modifies file attributes
          PID:4580
      • 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:3112
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Views/modifies file attributes
          PID:4640
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:3000
        • C:\Windows\temp\java.exe
          "C:\Windows\temp\java.exe"
          3⤵
          • Modifies firewall policy service
          • Modifies security service
          • 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:4684
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
            4⤵
            • Modifies firewall policy service
            • Modifies security service
            • Adds Run key to start application
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3460
            • C:\Windows\SysWOW64\notepad.exe
              notepad
              5⤵
                PID:3712
        • C:\Users\Admin\AppData\Local\Temp\1.exe
          "C:\Users\Admin\AppData\Local\Temp\1.exe"
          2⤵
          • Executes dropped EXE
          • Checks computer location settings
          PID:1944
          • C:\Users\Admin\AppData\Local\Temp\svchost.exe
            "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
            3⤵
            • Executes dropped EXE
            • Drops startup file
            • Adds Run key to start application
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            PID:3420
            • C:\Windows\SysWOW64\netsh.exe
              netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\svchost.exe" "svchost.exe" ENABLE
              4⤵
                PID:816
          • C:\Users\Admin\AppData\Local\Temp\3.exe
            "C:\Users\Admin\AppData\Local\Temp\3.exe"
            2⤵
            • Executes dropped EXE
            PID:1192
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\3.exe" /rl HIGHEST /f
              3⤵
              • Creates scheduled task(s)
              PID:4540
            • C:\Users\Admin\AppData\Roaming\driver\driver.exe
              "C:\Users\Admin\AppData\Roaming\driver\driver.exe" -d2
              3⤵
              • Executes dropped EXE
              PID:4716

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Initial Access

        Replication Through Removable Media

        1
        T1091

        Execution

        Scheduled Task

        1
        T1053

        Persistence

        Winlogon Helper DLL

        1
        T1004

        Modify Existing Service

        3
        T1031

        Hidden Files and Directories

        2
        T1158

        Registry Run Keys / Startup Folder

        1
        T1060

        Scheduled Task

        1
        T1053

        Privilege Escalation

        Scheduled Task

        1
        T1053

        Defense Evasion

        Modify Registry

        7
        T1112

        Disabling Security Tools

        2
        T1089

        Hidden Files and Directories

        2
        T1158

        Discovery

        Query Registry

        1
        T1012

        System Information Discovery

        2
        T1082

        Lateral Movement

        Replication Through Removable Media

        1
        T1091

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\1.exe
          Filesize

          49KB

          MD5

          44276fd73f9654eb7aac24712b6678b3

          SHA1

          90adc57a4034c06f46d15cc9774502ca73d4c3b2

          SHA256

          dde17e40dc1453b61185a7f5c10df7dd76b097450f896a0df712b3b3f5683f4b

          SHA512

          1371c82ccd6202eb6359f740fb722cb40a188309d5cd6a743835d995fbb2bb29da9653d7c45f451c5148af275ba03e5bac0a17f4022216c0bc2a587b116eddf6

        • C:\Users\Admin\AppData\Local\Temp\1.exe
          Filesize

          49KB

          MD5

          44276fd73f9654eb7aac24712b6678b3

          SHA1

          90adc57a4034c06f46d15cc9774502ca73d4c3b2

          SHA256

          dde17e40dc1453b61185a7f5c10df7dd76b097450f896a0df712b3b3f5683f4b

          SHA512

          1371c82ccd6202eb6359f740fb722cb40a188309d5cd6a743835d995fbb2bb29da9653d7c45f451c5148af275ba03e5bac0a17f4022216c0bc2a587b116eddf6

        • C:\Users\Admin\AppData\Local\Temp\2.exe
          Filesize

          690KB

          MD5

          0b5d0f84291ee7f1839be29234bfeb7e

          SHA1

          4cf56760fe279da2337cb7ee6184297dafee805a

          SHA256

          2a6eec17d15b5a46589afad617aa7b141e0b087baf6ae82eac2e9c1c896e59bf

          SHA512

          3683dcfc41e368382a8308ed3fc8e165c613badcc200016b58ec2468cc07c4b74321e15e0ea133d13695c25bec09d4e8eaa8f6a6164c6536118ae6e10fdc9a18

        • C:\Users\Admin\AppData\Local\Temp\2.exe
          Filesize

          690KB

          MD5

          0b5d0f84291ee7f1839be29234bfeb7e

          SHA1

          4cf56760fe279da2337cb7ee6184297dafee805a

          SHA256

          2a6eec17d15b5a46589afad617aa7b141e0b087baf6ae82eac2e9c1c896e59bf

          SHA512

          3683dcfc41e368382a8308ed3fc8e165c613badcc200016b58ec2468cc07c4b74321e15e0ea133d13695c25bec09d4e8eaa8f6a6164c6536118ae6e10fdc9a18

        • C:\Users\Admin\AppData\Local\Temp\3.exe
          Filesize

          344KB

          MD5

          adb2eb09e5abf4b8ba14f026ed7343c4

          SHA1

          cbc506f1723891c458d7ccb3d135dd550a0d926e

          SHA256

          6be293224b4fbd57f391f449aefd1dad303e9b4c7c04da48d762c5a3933497da

          SHA512

          4fafad2f5d0820cdd64f13b95f6f73ea4b1646a64f8999d819a95063c00991c0de59dcc6909ffad58285d7cd430dead515c2f0cc06335226bf053e152520f7e0

        • C:\Users\Admin\AppData\Local\Temp\3.exe
          Filesize

          344KB

          MD5

          adb2eb09e5abf4b8ba14f026ed7343c4

          SHA1

          cbc506f1723891c458d7ccb3d135dd550a0d926e

          SHA256

          6be293224b4fbd57f391f449aefd1dad303e9b4c7c04da48d762c5a3933497da

          SHA512

          4fafad2f5d0820cdd64f13b95f6f73ea4b1646a64f8999d819a95063c00991c0de59dcc6909ffad58285d7cd430dead515c2f0cc06335226bf053e152520f7e0

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

          49KB

          MD5

          44276fd73f9654eb7aac24712b6678b3

          SHA1

          90adc57a4034c06f46d15cc9774502ca73d4c3b2

          SHA256

          dde17e40dc1453b61185a7f5c10df7dd76b097450f896a0df712b3b3f5683f4b

          SHA512

          1371c82ccd6202eb6359f740fb722cb40a188309d5cd6a743835d995fbb2bb29da9653d7c45f451c5148af275ba03e5bac0a17f4022216c0bc2a587b116eddf6

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

          49KB

          MD5

          44276fd73f9654eb7aac24712b6678b3

          SHA1

          90adc57a4034c06f46d15cc9774502ca73d4c3b2

          SHA256

          dde17e40dc1453b61185a7f5c10df7dd76b097450f896a0df712b3b3f5683f4b

          SHA512

          1371c82ccd6202eb6359f740fb722cb40a188309d5cd6a743835d995fbb2bb29da9653d7c45f451c5148af275ba03e5bac0a17f4022216c0bc2a587b116eddf6

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

          344KB

          MD5

          adb2eb09e5abf4b8ba14f026ed7343c4

          SHA1

          cbc506f1723891c458d7ccb3d135dd550a0d926e

          SHA256

          6be293224b4fbd57f391f449aefd1dad303e9b4c7c04da48d762c5a3933497da

          SHA512

          4fafad2f5d0820cdd64f13b95f6f73ea4b1646a64f8999d819a95063c00991c0de59dcc6909ffad58285d7cd430dead515c2f0cc06335226bf053e152520f7e0

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

          344KB

          MD5

          adb2eb09e5abf4b8ba14f026ed7343c4

          SHA1

          cbc506f1723891c458d7ccb3d135dd550a0d926e

          SHA256

          6be293224b4fbd57f391f449aefd1dad303e9b4c7c04da48d762c5a3933497da

          SHA512

          4fafad2f5d0820cdd64f13b95f6f73ea4b1646a64f8999d819a95063c00991c0de59dcc6909ffad58285d7cd430dead515c2f0cc06335226bf053e152520f7e0

        • C:\Windows\Temp\java.exe
          Filesize

          690KB

          MD5

          0b5d0f84291ee7f1839be29234bfeb7e

          SHA1

          4cf56760fe279da2337cb7ee6184297dafee805a

          SHA256

          2a6eec17d15b5a46589afad617aa7b141e0b087baf6ae82eac2e9c1c896e59bf

          SHA512

          3683dcfc41e368382a8308ed3fc8e165c613badcc200016b58ec2468cc07c4b74321e15e0ea133d13695c25bec09d4e8eaa8f6a6164c6536118ae6e10fdc9a18

        • C:\Windows\temp\java.exe
          Filesize

          690KB

          MD5

          0b5d0f84291ee7f1839be29234bfeb7e

          SHA1

          4cf56760fe279da2337cb7ee6184297dafee805a

          SHA256

          2a6eec17d15b5a46589afad617aa7b141e0b087baf6ae82eac2e9c1c896e59bf

          SHA512

          3683dcfc41e368382a8308ed3fc8e165c613badcc200016b58ec2468cc07c4b74321e15e0ea133d13695c25bec09d4e8eaa8f6a6164c6536118ae6e10fdc9a18

        • memory/816-161-0x0000000000000000-mapping.dmp
        • memory/976-139-0x0000000000000000-mapping.dmp
        • memory/1192-149-0x0000000000150000-0x00000000001AA000-memory.dmp
          Filesize

          360KB

        • memory/1192-160-0x0000000005370000-0x0000000005402000-memory.dmp
          Filesize

          584KB

        • memory/1192-136-0x0000000000000000-mapping.dmp
        • memory/1192-151-0x0000000005810000-0x0000000005DB4000-memory.dmp
          Filesize

          5.6MB

        • memory/1192-150-0x0000000004C70000-0x0000000004CD6000-memory.dmp
          Filesize

          408KB

        • memory/1944-144-0x0000000075100000-0x00000000756B1000-memory.dmp
          Filesize

          5.7MB

        • memory/1944-133-0x0000000000000000-mapping.dmp
        • memory/2148-130-0x0000000000000000-mapping.dmp
        • memory/3000-141-0x0000000000000000-mapping.dmp
        • memory/3112-140-0x0000000000000000-mapping.dmp
        • memory/3420-152-0x0000000000000000-mapping.dmp
        • memory/3420-155-0x0000000075100000-0x00000000756B1000-memory.dmp
          Filesize

          5.7MB

        • memory/3712-148-0x0000000000000000-mapping.dmp
        • memory/4540-156-0x0000000000000000-mapping.dmp
        • memory/4580-143-0x0000000000000000-mapping.dmp
        • memory/4640-142-0x0000000000000000-mapping.dmp
        • memory/4684-145-0x0000000000000000-mapping.dmp
        • memory/4716-157-0x0000000000000000-mapping.dmp