Overview

overview

10

Static

static

10

c8c743dbb1...17.exe

windows7_x64

10

c8c743dbb1...17.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    156s
  • max time network
    173s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 00:06

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General

  • Target

    c8c743dbb1eae089af4724f547b6a0b0c38e7b25fbc5699e5218dad4cfe1e317.exe

  • Size

    37KB

  • MD5

    fe539f5b615a9dbb6c67e91499888daf

  • SHA1

    267e7b00433be2c8ac5d1c8a4ee1d90065d8094b

  • SHA256

    c8c743dbb1eae089af4724f547b6a0b0c38e7b25fbc5699e5218dad4cfe1e317

  • SHA512

    cdf6a70381022504e3dd967626c4b560d8cadf3357055ceacd615f05f18315caab0b591d0bcb242bb9e3d524d6124eb054826b21c5873035fb72f28e57b0784a

Score
10/10
njratkarochedaunievasiontrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

karochedauni

C2

194.34.132.152:7576

Mutex

e4cef66ebf3fdf7f22614d89de91686c

Attributes
  • reg_key

    e4cef66ebf3fdf7f22614d89de91686c

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Drops autorun.inf file 1 TTPs

    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). Likely ransomware behaviour.

  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious use of AdjustPrivilegeToken 34 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c8c743dbb1eae089af4724f547b6a0b0c38e7b25fbc5699e5218dad4cfe1e317.exe
    "C:\Users\Admin\AppData\Local\Temp\c8c743dbb1eae089af4724f547b6a0b0c38e7b25fbc5699e5218dad4cfe1e317.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3248
    • C:\Users\Admin\AppData\Local\Temp\extrimhack_private.exe
      "C:\Users\Admin\AppData\Local\Temp\extrimhack_private.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2688
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\extrimhack_private.exe" "extrimhack_private.exe" ENABLE
        3⤵
          PID:4216
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /IM Taskmgr.exe
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:3984

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Replication Through Removable Media

    1
    T1091

    Execution

    Persistence

    Modify Existing Service

    1
    T1031

    Privilege Escalation

    Defense Evasion

    Credential Access

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Lateral Movement

    Replication Through Removable Media

    1
    T1091

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\extrimhack_private.exe
      Filesize

      37KB

      MD5

      fe539f5b615a9dbb6c67e91499888daf

      SHA1

      267e7b00433be2c8ac5d1c8a4ee1d90065d8094b

      SHA256

      c8c743dbb1eae089af4724f547b6a0b0c38e7b25fbc5699e5218dad4cfe1e317

      SHA512

      cdf6a70381022504e3dd967626c4b560d8cadf3357055ceacd615f05f18315caab0b591d0bcb242bb9e3d524d6124eb054826b21c5873035fb72f28e57b0784a

      Download Submit
    • C:\Users\Admin\AppData\Local\Temp\extrimhack_private.exe
      Filesize

      37KB

      MD5

      fe539f5b615a9dbb6c67e91499888daf

      SHA1

      267e7b00433be2c8ac5d1c8a4ee1d90065d8094b

      SHA256

      c8c743dbb1eae089af4724f547b6a0b0c38e7b25fbc5699e5218dad4cfe1e317

      SHA512

      cdf6a70381022504e3dd967626c4b560d8cadf3357055ceacd615f05f18315caab0b591d0bcb242bb9e3d524d6124eb054826b21c5873035fb72f28e57b0784a

      Download Submit
    • memory/2688-131-0x0000000000000000-mapping.dmp
      Download
    • memory/2688-134-0x0000000075300000-0x00000000758B1000-memory.dmp
      Filesize

      5.7MB

      Download
    • memory/3248-130-0x0000000075300000-0x00000000758B1000-memory.dmp
      Filesize

      5.7MB

      Download
    • memory/3984-136-0x0000000000000000-mapping.dmp
      Download
    • memory/4216-135-0x0000000000000000-mapping.dmp
      Download