Analysis

  • max time kernel
    43s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    18-06-2022 12:03

General

  • Target

    Kogtervan.exe

  • Size

    1.2MB

  • MD5

    1557a74487c9a87068200ed57aa4f41c

  • SHA1

    21c6fe977ffe351442dde5a67302d934448c2798

  • SHA256

    e672d73cf01f809e167c3b42609d6eb719ae187313f083e4e0ce522d6e6d8f3f

  • SHA512

    d1341180c9426a346bec55bd6ba606de52ffab8309868e28d276120817d20a587a74d58c442efa8cd125d2954b43ec4c0d5d1f88f9dd637d1c346853e75a3c44

Malware Config

Extracted

Family

orcus

Botnet

User

C2

212.220.202.104:1604

Mutex

f3551b5b37bf41eb87431cb1dd626833

Attributes
  • autostart_method

    Registry

  • enable_keylogger

    true

  • install_path

    %programfiles%\System\Update.exe

  • reconnect_delay

    500

  • registry_keyname

    Ocrus

  • taskscheduler_taskname

    Ocrus

  • watchdog_path

    AppData\system32

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/921092565279850547/hht9p6Dov5UjlDv5Ho0zPIWCWLDfItsjCjCzkyreb1p0x6_xjYrced5Y9xHEMY-_qP8i

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • Orcus

    Orcus is a Remote Access Trojan that is being sold on underground forums.

  • Orcus Main Payload 7 IoCs
  • Orcurs Rat Executable 9 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Kogtervan.exe
    "C:\Users\Admin\AppData\Local\Temp\Kogtervan.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1460
    • C:\Users\Admin\AppData\Local\Temp\Soft.exe
      "C:\Users\Admin\AppData\Local\Temp\Soft.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:900
      • C:\Windows\SysWOW64\WindowsInput.exe
        "C:\Windows\SysWOW64\WindowsInput.exe" --install
        3⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        PID:1868
      • C:\Program Files (x86)\System\Update.exe
        "C:\Program Files (x86)\System\Update.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:672
    • C:\Users\Admin\AppData\Local\Temp\Insidious.exe
      "C:\Users\Admin\AppData\Local\Temp\Insidious.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2012
  • C:\Windows\SysWOW64\WindowsInput.exe
    "C:\Windows\SysWOW64\WindowsInput.exe"
    1⤵
    • Executes dropped EXE
    PID:1288
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {321B3335-A3A6-4358-9C30-931785CA0291} S-1-5-21-2277218442-1199762539-2004043321-1000:AUVQQRRF\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:568
    • C:\Program Files (x86)\System\Update.exe
      "C:\Program Files (x86)\System\Update.exe"
      2⤵
      • Executes dropped EXE
      PID:1888

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\System\Update.exe

    Filesize

    928KB

    MD5

    abc4b38009114ed7dae0d6e988532b46

    SHA1

    ace97d12bc68117dd3e6af05c123f4ce6580c320

    SHA256

    5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

    SHA512

    83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

  • C:\Program Files (x86)\System\Update.exe

    Filesize

    928KB

    MD5

    abc4b38009114ed7dae0d6e988532b46

    SHA1

    ace97d12bc68117dd3e6af05c123f4ce6580c320

    SHA256

    5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

    SHA512

    83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

  • C:\Program Files (x86)\System\Update.exe

    Filesize

    928KB

    MD5

    abc4b38009114ed7dae0d6e988532b46

    SHA1

    ace97d12bc68117dd3e6af05c123f4ce6580c320

    SHA256

    5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

    SHA512

    83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

  • C:\Program Files (x86)\System\Update.exe.config

    Filesize

    357B

    MD5

    a2b76cea3a59fa9af5ea21ff68139c98

    SHA1

    35d76475e6a54c168f536e30206578babff58274

    SHA256

    f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

    SHA512

    b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

  • C:\Users\Admin\AppData\Local\Temp\Insidious.exe

    Filesize

    274KB

    MD5

    1df27f86af1fa04dd8fa366932c4e5a4

    SHA1

    b6c76c7ef5907909782c8f15f9a5d2c2d9ef5b3f

    SHA256

    3ccceda1aecfae9d07d5b2906addaca7e0c7c379bfd357cf4a1b9306bbf887df

    SHA512

    f0270e3b15fc11a3f3a930ea08f54a83671dda748dfb9c410c11b74b94a98b1ebaf5905517c0a7b23e6102380fbaa5f7023f740bdf849a684cde4eb1a9b65e1c

  • C:\Users\Admin\AppData\Local\Temp\Insidious.exe

    Filesize

    274KB

    MD5

    1df27f86af1fa04dd8fa366932c4e5a4

    SHA1

    b6c76c7ef5907909782c8f15f9a5d2c2d9ef5b3f

    SHA256

    3ccceda1aecfae9d07d5b2906addaca7e0c7c379bfd357cf4a1b9306bbf887df

    SHA512

    f0270e3b15fc11a3f3a930ea08f54a83671dda748dfb9c410c11b74b94a98b1ebaf5905517c0a7b23e6102380fbaa5f7023f740bdf849a684cde4eb1a9b65e1c

  • C:\Users\Admin\AppData\Local\Temp\Soft.exe

    Filesize

    928KB

    MD5

    abc4b38009114ed7dae0d6e988532b46

    SHA1

    ace97d12bc68117dd3e6af05c123f4ce6580c320

    SHA256

    5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

    SHA512

    83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

  • C:\Users\Admin\AppData\Local\Temp\Soft.exe

    Filesize

    928KB

    MD5

    abc4b38009114ed7dae0d6e988532b46

    SHA1

    ace97d12bc68117dd3e6af05c123f4ce6580c320

    SHA256

    5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

    SHA512

    83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

  • C:\Windows\SysWOW64\WindowsInput.exe

    Filesize

    21KB

    MD5

    e6fcf516d8ed8d0d4427f86e08d0d435

    SHA1

    c7691731583ab7890086635cb7f3e4c22ca5e409

    SHA256

    8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

    SHA512

    c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

  • C:\Windows\SysWOW64\WindowsInput.exe

    Filesize

    21KB

    MD5

    e6fcf516d8ed8d0d4427f86e08d0d435

    SHA1

    c7691731583ab7890086635cb7f3e4c22ca5e409

    SHA256

    8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

    SHA512

    c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

  • C:\Windows\SysWOW64\WindowsInput.exe

    Filesize

    21KB

    MD5

    e6fcf516d8ed8d0d4427f86e08d0d435

    SHA1

    c7691731583ab7890086635cb7f3e4c22ca5e409

    SHA256

    8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

    SHA512

    c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

  • C:\Windows\SysWOW64\WindowsInput.exe.config

    Filesize

    357B

    MD5

    a2b76cea3a59fa9af5ea21ff68139c98

    SHA1

    35d76475e6a54c168f536e30206578babff58274

    SHA256

    f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

    SHA512

    b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

  • \Program Files (x86)\System\Update.exe

    Filesize

    928KB

    MD5

    abc4b38009114ed7dae0d6e988532b46

    SHA1

    ace97d12bc68117dd3e6af05c123f4ce6580c320

    SHA256

    5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

    SHA512

    83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

  • \Users\Admin\AppData\Local\Temp\Insidious.exe

    Filesize

    274KB

    MD5

    1df27f86af1fa04dd8fa366932c4e5a4

    SHA1

    b6c76c7ef5907909782c8f15f9a5d2c2d9ef5b3f

    SHA256

    3ccceda1aecfae9d07d5b2906addaca7e0c7c379bfd357cf4a1b9306bbf887df

    SHA512

    f0270e3b15fc11a3f3a930ea08f54a83671dda748dfb9c410c11b74b94a98b1ebaf5905517c0a7b23e6102380fbaa5f7023f740bdf849a684cde4eb1a9b65e1c

  • \Users\Admin\AppData\Local\Temp\Soft.exe

    Filesize

    928KB

    MD5

    abc4b38009114ed7dae0d6e988532b46

    SHA1

    ace97d12bc68117dd3e6af05c123f4ce6580c320

    SHA256

    5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

    SHA512

    83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

  • \Windows\SysWOW64\WindowsInput.exe

    Filesize

    21KB

    MD5

    e6fcf516d8ed8d0d4427f86e08d0d435

    SHA1

    c7691731583ab7890086635cb7f3e4c22ca5e409

    SHA256

    8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

    SHA512

    c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

  • memory/672-86-0x00000000007E0000-0x000000000082E000-memory.dmp

    Filesize

    312KB

  • memory/672-79-0x0000000000000000-mapping.dmp

  • memory/672-93-0x0000000004D45000-0x0000000004D56000-memory.dmp

    Filesize

    68KB

  • memory/672-91-0x0000000004D45000-0x0000000004D56000-memory.dmp

    Filesize

    68KB

  • memory/672-88-0x0000000000BA0000-0x0000000000BB0000-memory.dmp

    Filesize

    64KB

  • memory/672-87-0x0000000000B70000-0x0000000000B88000-memory.dmp

    Filesize

    96KB

  • memory/672-85-0x0000000000340000-0x0000000000352000-memory.dmp

    Filesize

    72KB

  • memory/672-83-0x00000000001F0000-0x00000000002DE000-memory.dmp

    Filesize

    952KB

  • memory/900-56-0x0000000000000000-mapping.dmp

  • memory/900-69-0x0000000000690000-0x0000000000698000-memory.dmp

    Filesize

    32KB

  • memory/900-65-0x0000000000370000-0x000000000037E000-memory.dmp

    Filesize

    56KB

  • memory/900-66-0x0000000000900000-0x000000000095C000-memory.dmp

    Filesize

    368KB

  • memory/900-63-0x0000000000390000-0x000000000047E000-memory.dmp

    Filesize

    952KB

  • memory/900-68-0x00000000005B0000-0x00000000005C2000-memory.dmp

    Filesize

    72KB

  • memory/1288-77-0x0000000000E10000-0x0000000000E1C000-memory.dmp

    Filesize

    48KB

  • memory/1460-54-0x00000000763E1000-0x00000000763E3000-memory.dmp

    Filesize

    8KB

  • memory/1868-71-0x0000000000000000-mapping.dmp

  • memory/1868-75-0x0000000000C70000-0x0000000000C7C000-memory.dmp

    Filesize

    48KB

  • memory/1888-89-0x0000000000000000-mapping.dmp

  • memory/2012-60-0x0000000000000000-mapping.dmp

  • memory/2012-64-0x0000000000910000-0x000000000095A000-memory.dmp

    Filesize

    296KB