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Analysis

  • max time kernel
    7s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    21/09/2022, 04:05

General

  • Target

    HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe

  • Size

    49KB

  • MD5

    5e685c7264d47dd21ebfa36a9437d142

  • SHA1

    0984924bd1ff568a94e16240935c03a91e7a8ddf

  • SHA256

    02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1

  • SHA512

    bd7b34592aecaa4184c191159acc7724a0f393efe98673a36596ff7665e9415b49238293f187a36564287e8cfdbb7478fc1759f81a3b5d9b52c3f7e47b5cf294

  • SSDEEP

    768:bqo2mpeWxyfr9+d4mZryx7L2ksQ1QCEez:2o2Ixyfr9+dsx32XKZz

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 3 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Drops startup file 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe
    "C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2000
    • C:\Users\Admin\AppData\Roaming\PENTA.exe
      "C:\Users\Admin\AppData\Roaming\PENTA.exe"
      2⤵
      • Executes dropped EXE
      • Modifies extensions of user files
      • Drops startup file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1656

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\PENTA.exe

    Filesize

    49KB

    MD5

    5e685c7264d47dd21ebfa36a9437d142

    SHA1

    0984924bd1ff568a94e16240935c03a91e7a8ddf

    SHA256

    02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1

    SHA512

    bd7b34592aecaa4184c191159acc7724a0f393efe98673a36596ff7665e9415b49238293f187a36564287e8cfdbb7478fc1759f81a3b5d9b52c3f7e47b5cf294

  • C:\Users\Admin\AppData\Roaming\PENTA.exe

    Filesize

    49KB

    MD5

    5e685c7264d47dd21ebfa36a9437d142

    SHA1

    0984924bd1ff568a94e16240935c03a91e7a8ddf

    SHA256

    02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1

    SHA512

    bd7b34592aecaa4184c191159acc7724a0f393efe98673a36596ff7665e9415b49238293f187a36564287e8cfdbb7478fc1759f81a3b5d9b52c3f7e47b5cf294

  • memory/1656-58-0x00000000009B0000-0x00000000009C2000-memory.dmp

    Filesize

    72KB

  • memory/2000-54-0x0000000000D20000-0x0000000000D32000-memory.dmp

    Filesize

    72KB