Analysis

  • max time kernel
    187s
  • max time network
    194s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-10-2022 23:50

General

  • Target

    bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd.exe

  • Size

    684KB

  • MD5

    a2956dfca9be381f1184f9ce81845ab0

  • SHA1

    a92d3c8c18b08f1fa2be87d850799c6c271bb8ec

  • SHA256

    bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd

  • SHA512

    4fd4c221910cb6d1f577fa427e479ba677c77c592f6b0cca6cb94081357cc56c185df5d233614a1bd867de60520b3320c8b5e0fce7297504e2cda5985bc07789

  • SSDEEP

    12288:UpgvmzFHi0mo5aH0qMzd5807F4PJQPDHvd:UpgvOHi0mGaH0qSdPFq4V

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • UAC bypass 3 TTPs 11 IoCs
  • Adds policy Run key to start application 2 TTPs 18 IoCs
  • Disables RegEdit via registry modification 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 64 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • System policy modification 1 TTPs 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd.exe
    "C:\Users\Admin\AppData\Local\Temp\bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds policy Run key to start application
    • Disables RegEdit via registry modification
    • Loads dropped DLL
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1092
    • C:\Users\Admin\AppData\Local\Temp\wehtbfo.exe
      "C:\Users\Admin\AppData\Local\Temp\wehtbfo.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:1540
    • C:\Users\Admin\AppData\Local\Temp\wehtbfo.exe
      "C:\Users\Admin\AppData\Local\Temp\wehtbfo.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • System policy modification
      PID:1648

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    1.2MB

    MD5

    c04eeb1ffee63d268d77cbdf5ab9fc88

    SHA1

    b0d56cdcc32a3ac1c8cd79aa57309e82663b217d

    SHA256

    83c74cfc2acefcfd7f32f4bafdb151baee63e2ecba6a4331d8932849e1d9babe

    SHA512

    f4651e12d93e9e7cf8a4c66f9c9f8f29ba03f6a67eeb1c548616bd1e26871adcd44175989cd062d0cff29888885b00fd93ecda9b7e3ef3fee745947802f59114

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

    Filesize

    1.2MB

    MD5

    c04eeb1ffee63d268d77cbdf5ab9fc88

    SHA1

    b0d56cdcc32a3ac1c8cd79aa57309e82663b217d

    SHA256

    83c74cfc2acefcfd7f32f4bafdb151baee63e2ecba6a4331d8932849e1d9babe

    SHA512

    f4651e12d93e9e7cf8a4c66f9c9f8f29ba03f6a67eeb1c548616bd1e26871adcd44175989cd062d0cff29888885b00fd93ecda9b7e3ef3fee745947802f59114

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

    Filesize

    1.2MB

    MD5

    c04eeb1ffee63d268d77cbdf5ab9fc88

    SHA1

    b0d56cdcc32a3ac1c8cd79aa57309e82663b217d

    SHA256

    83c74cfc2acefcfd7f32f4bafdb151baee63e2ecba6a4331d8932849e1d9babe

    SHA512

    f4651e12d93e9e7cf8a4c66f9c9f8f29ba03f6a67eeb1c548616bd1e26871adcd44175989cd062d0cff29888885b00fd93ecda9b7e3ef3fee745947802f59114

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

    Filesize

    1.2MB

    MD5

    c04eeb1ffee63d268d77cbdf5ab9fc88

    SHA1

    b0d56cdcc32a3ac1c8cd79aa57309e82663b217d

    SHA256

    83c74cfc2acefcfd7f32f4bafdb151baee63e2ecba6a4331d8932849e1d9babe

    SHA512

    f4651e12d93e9e7cf8a4c66f9c9f8f29ba03f6a67eeb1c548616bd1e26871adcd44175989cd062d0cff29888885b00fd93ecda9b7e3ef3fee745947802f59114

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

    Filesize

    1.2MB

    MD5

    c04eeb1ffee63d268d77cbdf5ab9fc88

    SHA1

    b0d56cdcc32a3ac1c8cd79aa57309e82663b217d

    SHA256

    83c74cfc2acefcfd7f32f4bafdb151baee63e2ecba6a4331d8932849e1d9babe

    SHA512

    f4651e12d93e9e7cf8a4c66f9c9f8f29ba03f6a67eeb1c548616bd1e26871adcd44175989cd062d0cff29888885b00fd93ecda9b7e3ef3fee745947802f59114

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

    Filesize

    1.2MB

    MD5

    c04eeb1ffee63d268d77cbdf5ab9fc88

    SHA1

    b0d56cdcc32a3ac1c8cd79aa57309e82663b217d

    SHA256

    83c74cfc2acefcfd7f32f4bafdb151baee63e2ecba6a4331d8932849e1d9babe

    SHA512

    f4651e12d93e9e7cf8a4c66f9c9f8f29ba03f6a67eeb1c548616bd1e26871adcd44175989cd062d0cff29888885b00fd93ecda9b7e3ef3fee745947802f59114

  • memory/1092-65-0x0000000074631000-0x0000000074633000-memory.dmp

    Filesize

    8KB

  • memory/1092-54-0x0000000075201000-0x0000000075203000-memory.dmp

    Filesize

    8KB

  • memory/1540-57-0x0000000000000000-mapping.dmp

  • memory/1540-90-0x0000000074301000-0x0000000074303000-memory.dmp

    Filesize

    8KB

  • memory/1540-92-0x0000000074301000-0x0000000074303000-memory.dmp

    Filesize

    8KB

  • memory/1648-66-0x0000000074641000-0x0000000074643000-memory.dmp

    Filesize

    8KB

  • memory/1648-62-0x0000000000000000-mapping.dmp

  • memory/1648-67-0x0000000074691000-0x0000000074693000-memory.dmp

    Filesize

    8KB

  • memory/1648-68-0x0000000074471000-0x0000000074473000-memory.dmp

    Filesize

    8KB

  • memory/1648-71-0x0000000074301000-0x0000000074303000-memory.dmp

    Filesize

    8KB

  • memory/1648-72-0x0000000074471000-0x0000000074473000-memory.dmp

    Filesize

    8KB

  • memory/1648-91-0x0000000074471000-0x0000000074473000-memory.dmp

    Filesize

    8KB