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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/01/2024, 03:30

General

  • Target

    502869ac1880a412f2a5d8dae93b506d98acb48f10cdb32bcdc3517fc9721711.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
  • 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
  • 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 37 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\502869ac1880a412f2a5d8dae93b506d98acb48f10cdb32bcdc3517fc9721711.exe
    "C:\Users\Admin\AppData\Local\Temp\502869ac1880a412f2a5d8dae93b506d98acb48f10cdb32bcdc3517fc9721711.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3712
    • 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:1540
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:4960
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM Exsample.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3404
  • C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
    1⤵
      PID:3460
    • C:\Windows\System32\svchost.exe
      C:\Windows\System32\svchost.exe -k UnistackSvcGroup
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:444

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      37KB

      MD5

      bae07bd6859074bae50dbebfbde6807f

      SHA1

      072942a2f73e4f7f83d5559499f4c7c22136f559

      SHA256

      502869ac1880a412f2a5d8dae93b506d98acb48f10cdb32bcdc3517fc9721711

      SHA512

      724689e8a1d9915a970c751c98ce45fca0d945a6a4328aee388ffcdb8076307a438f4196c0016bf052306ecd70453ec19db2788873d23f17e876d7bf09337e30

    • memory/444-42-0x0000023C8ADA0000-0x0000023C8ADB0000-memory.dmp

      Filesize

      64KB

    • memory/444-26-0x0000023C8ACA0000-0x0000023C8ACB0000-memory.dmp

      Filesize

      64KB

    • memory/444-61-0x0000023C93140000-0x0000023C93141000-memory.dmp

      Filesize

      4KB

    • memory/444-62-0x0000023C93250000-0x0000023C93251000-memory.dmp

      Filesize

      4KB

    • memory/444-60-0x0000023C93140000-0x0000023C93141000-memory.dmp

      Filesize

      4KB

    • memory/444-58-0x0000023C93110000-0x0000023C93111000-memory.dmp

      Filesize

      4KB

    • memory/1540-13-0x00000000747D0000-0x0000000074D81000-memory.dmp

      Filesize

      5.7MB

    • memory/1540-25-0x0000000001890000-0x00000000018A0000-memory.dmp

      Filesize

      64KB

    • memory/1540-24-0x00000000747D0000-0x0000000074D81000-memory.dmp

      Filesize

      5.7MB

    • memory/1540-14-0x0000000001890000-0x00000000018A0000-memory.dmp

      Filesize

      64KB

    • memory/3712-0-0x00000000747D0000-0x0000000074D81000-memory.dmp

      Filesize

      5.7MB

    • memory/3712-2-0x00000000747D0000-0x0000000074D81000-memory.dmp

      Filesize

      5.7MB

    • memory/3712-12-0x00000000747D0000-0x0000000074D81000-memory.dmp

      Filesize

      5.7MB

    • memory/3712-1-0x00000000019B0000-0x00000000019C0000-memory.dmp

      Filesize

      64KB