Analysis

  • max time kernel
    150s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    21-03-2023 14:41

General

  • Target

    f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe

  • Size

    916KB

  • MD5

    1531ddf6b03ab9f7b0c46381210d82ca

  • SHA1

    53f1566838a6e380e6f83e256ab7aac1e028f39f

  • SHA256

    f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

  • SHA512

    4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

  • SSDEEP

    24576:ZVWC4MROxnFD3kw8XlrrcI0AilFEvxHPMrooG:ZqMiJorrcI0AilFEvxHP

Malware Config

Extracted

Family

orcus

C2

84.21.172.55:1339

Mutex

5e29a9dc07244cd5b38b6e685c293580

Attributes
  • autostart_method

    TaskScheduler

  • enable_keylogger

    false

  • install_path

    %programfiles%\Chrome\ChromeUpdateService.exe

  • reconnect_delay

    10000

  • registry_keyname

    Orcus

  • taskscheduler_taskname

    SmarterScreen

  • watchdog_path

    AppData\WindowsToolKit.exe

Signatures

  • Orcus

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

  • Orcus main payload 5 IoCs
  • Orcurs Rat Executable 8 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 3 IoCs
  • 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.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
    "C:\Users\Admin\AppData\Local\Temp\f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Windows\SysWOW64\WindowsInput.exe
      "C:\Windows\SysWOW64\WindowsInput.exe" --install
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      PID:1052
    • C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
      "C:\Program Files (x86)\Chrome\ChromeUpdateService.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:608
      • C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe
        "C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe" /launchSelfAndExit "C:\Program Files (x86)\Chrome\ChromeUpdateService.exe" 608
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:936
        • C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe
          "C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe" /watchProcess "C:\Program Files (x86)\Chrome\ChromeUpdateService.exe" 608
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:812
  • C:\Windows\SysWOW64\WindowsInput.exe
    "C:\Windows\SysWOW64\WindowsInput.exe"
    1⤵
    • Executes dropped EXE
    PID:1680
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {60317E1C-25A7-4019-9ACB-D072D2342BF0} S-1-5-21-3499517378-2376672570-1134980332-1000:MLXLFKOI\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1076
    • C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
      "C:\Program Files (x86)\Chrome\ChromeUpdateService.exe"
      2⤵
      • Executes dropped EXE
      PID:1120

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
    Filesize

    916KB

    MD5

    1531ddf6b03ab9f7b0c46381210d82ca

    SHA1

    53f1566838a6e380e6f83e256ab7aac1e028f39f

    SHA256

    f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

    SHA512

    4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

  • C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
    Filesize

    916KB

    MD5

    1531ddf6b03ab9f7b0c46381210d82ca

    SHA1

    53f1566838a6e380e6f83e256ab7aac1e028f39f

    SHA256

    f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

    SHA512

    4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

  • C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
    Filesize

    916KB

    MD5

    1531ddf6b03ab9f7b0c46381210d82ca

    SHA1

    53f1566838a6e380e6f83e256ab7aac1e028f39f

    SHA256

    f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

    SHA512

    4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

  • C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
    Filesize

    916KB

    MD5

    1531ddf6b03ab9f7b0c46381210d82ca

    SHA1

    53f1566838a6e380e6f83e256ab7aac1e028f39f

    SHA256

    f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

    SHA512

    4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

  • C:\Program Files (x86)\Chrome\ChromeUpdateService.exe.config
    Filesize

    357B

    MD5

    a2b76cea3a59fa9af5ea21ff68139c98

    SHA1

    35d76475e6a54c168f536e30206578babff58274

    SHA256

    f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

    SHA512

    b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

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

    9KB

    MD5

    913967b216326e36a08010fb70f9dba3

    SHA1

    7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

    SHA256

    8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

    SHA512

    c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

    9KB

    MD5

    913967b216326e36a08010fb70f9dba3

    SHA1

    7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

    SHA256

    8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

    SHA512

    c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

    9KB

    MD5

    913967b216326e36a08010fb70f9dba3

    SHA1

    7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

    SHA256

    8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

    SHA512

    c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

  • C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe.config
    Filesize

    357B

    MD5

    a2b76cea3a59fa9af5ea21ff68139c98

    SHA1

    35d76475e6a54c168f536e30206578babff58274

    SHA256

    f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

    SHA512

    b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

  • 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)\Chrome\ChromeUpdateService.exe
    Filesize

    916KB

    MD5

    1531ddf6b03ab9f7b0c46381210d82ca

    SHA1

    53f1566838a6e380e6f83e256ab7aac1e028f39f

    SHA256

    f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

    SHA512

    4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

  • \Users\Admin\AppData\Roaming\WindowsToolKit.exe
    Filesize

    9KB

    MD5

    913967b216326e36a08010fb70f9dba3

    SHA1

    7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

    SHA256

    8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

    SHA512

    c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

  • \Windows\SysWOW64\WindowsInput.exe
    Filesize

    21KB

    MD5

    e6fcf516d8ed8d0d4427f86e08d0d435

    SHA1

    c7691731583ab7890086635cb7f3e4c22ca5e409

    SHA256

    8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

    SHA512

    c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

  • memory/608-88-0x0000000000F50000-0x0000000000F90000-memory.dmp
    Filesize

    256KB

  • memory/608-90-0x0000000000F50000-0x0000000000F90000-memory.dmp
    Filesize

    256KB

  • memory/608-83-0x0000000004CA0000-0x0000000004CEE000-memory.dmp
    Filesize

    312KB

  • memory/608-84-0x0000000000F90000-0x0000000000FA8000-memory.dmp
    Filesize

    96KB

  • memory/608-85-0x00000000044E0000-0x00000000044F0000-memory.dmp
    Filesize

    64KB

  • memory/608-82-0x0000000000FC0000-0x00000000010AA000-memory.dmp
    Filesize

    936KB

  • memory/608-121-0x0000000000F50000-0x0000000000F90000-memory.dmp
    Filesize

    256KB

  • memory/608-118-0x0000000000F50000-0x0000000000F90000-memory.dmp
    Filesize

    256KB

  • memory/608-120-0x0000000000F50000-0x0000000000F90000-memory.dmp
    Filesize

    256KB

  • memory/608-119-0x0000000000F50000-0x0000000000F90000-memory.dmp
    Filesize

    256KB

  • memory/936-97-0x0000000001240000-0x0000000001248000-memory.dmp
    Filesize

    32KB

  • memory/1052-67-0x00000000013B0000-0x00000000013BC000-memory.dmp
    Filesize

    48KB

  • memory/1052-68-0x000000001AAD0000-0x000000001AB50000-memory.dmp
    Filesize

    512KB

  • memory/1120-117-0x0000000000C00000-0x0000000000C40000-memory.dmp
    Filesize

    256KB

  • memory/1700-57-0x0000000004860000-0x00000000048A0000-memory.dmp
    Filesize

    256KB

  • memory/1700-55-0x0000000000450000-0x000000000045E000-memory.dmp
    Filesize

    56KB

  • memory/1700-56-0x00000000005B0000-0x000000000060C000-memory.dmp
    Filesize

    368KB

  • memory/1700-54-0x0000000000860000-0x000000000094A000-memory.dmp
    Filesize

    936KB

  • memory/1700-58-0x0000000000520000-0x0000000000532000-memory.dmp
    Filesize

    72KB