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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/06/2023, 17:04

General

  • Target

    1phc1YJN.exe

  • Size

    37KB

  • MD5

    fb0bdd758f8a9f405e6af2358da06ae1

  • SHA1

    6c283ab5e49e6fe3a93a996f850a5639fc49e3f5

  • SHA256

    9da4778fce03b654f62009b3d88958213f139b2f35fe1bed438100fae35bdfbf

  • SHA512

    71d3bd1c621a93bc54f1104285da5bf8e59bc26c3055cf708f61070c1a80ee705c33efd4a05acf3d3a90a9d9fca0357c66894dcb5045ab38b27834ff56c06253

  • SSDEEP

    384:NOpYoixJbl7OHg1WykrDPf7O8GsnRlrAF+rMRTyN/0L+EcoinblneHQM3epzXNsG:gpeR1NkrDPSlsRlrM+rMRa8NuPsCt

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

TrupAshot

C2

documents-elegant.at.ply.gg:54835

Mutex

4a87b5397a2736773782f50e108b2da4

Attributes
  • reg_key

    4a87b5397a2736773782f50e108b2da4

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops autorun.inf file 1 TTPs 3 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).

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1phc1YJN.exe
    "C:\Users\Admin\AppData\Local\Temp\1phc1YJN.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4400
    • C:\Users\Admin\AppData\Roaming\conhost.exe
      "C:\Users\Admin\AppData\Roaming\conhost.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:4656
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\conhost.exe" "conhost.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1808

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    37KB

    MD5

    fb0bdd758f8a9f405e6af2358da06ae1

    SHA1

    6c283ab5e49e6fe3a93a996f850a5639fc49e3f5

    SHA256

    9da4778fce03b654f62009b3d88958213f139b2f35fe1bed438100fae35bdfbf

    SHA512

    71d3bd1c621a93bc54f1104285da5bf8e59bc26c3055cf708f61070c1a80ee705c33efd4a05acf3d3a90a9d9fca0357c66894dcb5045ab38b27834ff56c06253

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

    Filesize

    37KB

    MD5

    fb0bdd758f8a9f405e6af2358da06ae1

    SHA1

    6c283ab5e49e6fe3a93a996f850a5639fc49e3f5

    SHA256

    9da4778fce03b654f62009b3d88958213f139b2f35fe1bed438100fae35bdfbf

    SHA512

    71d3bd1c621a93bc54f1104285da5bf8e59bc26c3055cf708f61070c1a80ee705c33efd4a05acf3d3a90a9d9fca0357c66894dcb5045ab38b27834ff56c06253

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

    Filesize

    37KB

    MD5

    fb0bdd758f8a9f405e6af2358da06ae1

    SHA1

    6c283ab5e49e6fe3a93a996f850a5639fc49e3f5

    SHA256

    9da4778fce03b654f62009b3d88958213f139b2f35fe1bed438100fae35bdfbf

    SHA512

    71d3bd1c621a93bc54f1104285da5bf8e59bc26c3055cf708f61070c1a80ee705c33efd4a05acf3d3a90a9d9fca0357c66894dcb5045ab38b27834ff56c06253

  • memory/4400-133-0x0000000000790000-0x00000000007A0000-memory.dmp

    Filesize

    64KB

  • memory/4656-143-0x0000000001300000-0x0000000001310000-memory.dmp

    Filesize

    64KB

  • memory/4656-149-0x0000000001300000-0x0000000001310000-memory.dmp

    Filesize

    64KB