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Analysis

  • max time kernel
    150s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    18/01/2024, 20:09

General

  • Target

    bae07bd6859074bae50dbebfbde6807f.exe

  • Size

    37KB

  • MD5

    bae07bd6859074bae50dbebfbde6807f

  • SHA1

    072942a2f73e4f7f83d5559499f4c7c22136f559

  • SHA256

    502869ac1880a412f2a5d8dae93b506d98acb48f10cdb32bcdc3517fc9721711

  • SHA512

    724689e8a1d9915a970c751c98ce45fca0d945a6a4328aee388ffcdb8076307a438f4196c0016bf052306ecd70453ec19db2788873d23f17e876d7bf09337e30

  • SSDEEP

    384:nOick7sgwi+tx3+j/NSyszg8QPBI3mmTlrAF+rMRTyN/0L+EcoinblneHQM3epzt:O5kQLCNhszg8QeWmBrM+rMRa8NuN3t

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed

C2

0.tcp.eu.ngrok.io:15184

Mutex

c502ee9893aaa40a8d929234e5c9b5c8

Attributes
  • reg_key

    c502ee9893aaa40a8d929234e5c9b5c8

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops autorun.inf file 1 TTPs 5 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bae07bd6859074bae50dbebfbde6807f.exe
    "C:\Users\Admin\AppData\Local\Temp\bae07bd6859074bae50dbebfbde6807f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2448
    • C:\Users\Admin\AppData\Roaming\server.exe
      "C:\Users\Admin\AppData\Roaming\server.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops autorun.inf file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2864
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:2724
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM Exsample.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2748

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Roaming\server.exe

    Filesize

    37KB

    MD5

    bae07bd6859074bae50dbebfbde6807f

    SHA1

    072942a2f73e4f7f83d5559499f4c7c22136f559

    SHA256

    502869ac1880a412f2a5d8dae93b506d98acb48f10cdb32bcdc3517fc9721711

    SHA512

    724689e8a1d9915a970c751c98ce45fca0d945a6a4328aee388ffcdb8076307a438f4196c0016bf052306ecd70453ec19db2788873d23f17e876d7bf09337e30

  • memory/2448-0-0x0000000074870000-0x0000000074E1B000-memory.dmp

    Filesize

    5.7MB

  • memory/2448-1-0x0000000002000000-0x0000000002040000-memory.dmp

    Filesize

    256KB

  • memory/2448-2-0x0000000074870000-0x0000000074E1B000-memory.dmp

    Filesize

    5.7MB

  • memory/2448-10-0x0000000074870000-0x0000000074E1B000-memory.dmp

    Filesize

    5.7MB

  • memory/2864-11-0x0000000074870000-0x0000000074E1B000-memory.dmp

    Filesize

    5.7MB

  • memory/2864-12-0x0000000000530000-0x0000000000570000-memory.dmp

    Filesize

    256KB

  • memory/2864-13-0x0000000074870000-0x0000000074E1B000-memory.dmp

    Filesize

    5.7MB

  • memory/2864-24-0x0000000000530000-0x0000000000570000-memory.dmp

    Filesize

    256KB

  • memory/2864-23-0x0000000074870000-0x0000000074E1B000-memory.dmp

    Filesize

    5.7MB