Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 16:19

General

  • Target

    0x000b000000003c9f-55.exe

  • Size

    37KB

  • MD5

    05d1abc69e538eb3c86bfeacc33c2a10

  • SHA1

    f424222562968f86d5d043cce57b1a0389061150

  • SHA256

    cf37aa59e0d281f372b3801bcd62dba2dbf280d6f9edb48dc9c1565897d81918

  • SHA512

    e8aa15db240a82a24e8143df79fec3356e60942df6c26ca4ea995108d9e165292679dc94ea4ff55a7831ac0a47a938c45594733e48052aabf865284229751526

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

WormRATT

C2

178.33.93.88:1742

Mutex

7869d44e9b90d6b1e669bf52c9e89c61

Attributes
  • reg_key

    7869d44e9b90d6b1e669bf52c9e89c61

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 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.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 19 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0x000b000000003c9f-55.exe
    "C:\Users\Admin\AppData\Local\Temp\0x000b000000003c9f-55.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Users\Admin\AppData\Local\Temp\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2008
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\svchost.exe" "svchost.exe" ENABLE
        3⤵
          PID:628

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Replication Through Removable Media

    1
    T1091

    Persistence

    Modify Existing Service

    1
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Lateral Movement

    Replication Through Removable Media

    1
    T1091

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      37KB

      MD5

      05d1abc69e538eb3c86bfeacc33c2a10

      SHA1

      f424222562968f86d5d043cce57b1a0389061150

      SHA256

      cf37aa59e0d281f372b3801bcd62dba2dbf280d6f9edb48dc9c1565897d81918

      SHA512

      e8aa15db240a82a24e8143df79fec3356e60942df6c26ca4ea995108d9e165292679dc94ea4ff55a7831ac0a47a938c45594733e48052aabf865284229751526

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

      37KB

      MD5

      05d1abc69e538eb3c86bfeacc33c2a10

      SHA1

      f424222562968f86d5d043cce57b1a0389061150

      SHA256

      cf37aa59e0d281f372b3801bcd62dba2dbf280d6f9edb48dc9c1565897d81918

      SHA512

      e8aa15db240a82a24e8143df79fec3356e60942df6c26ca4ea995108d9e165292679dc94ea4ff55a7831ac0a47a938c45594733e48052aabf865284229751526

    • \Users\Admin\AppData\Local\Temp\svchost.exe
      Filesize

      37KB

      MD5

      05d1abc69e538eb3c86bfeacc33c2a10

      SHA1

      f424222562968f86d5d043cce57b1a0389061150

      SHA256

      cf37aa59e0d281f372b3801bcd62dba2dbf280d6f9edb48dc9c1565897d81918

      SHA512

      e8aa15db240a82a24e8143df79fec3356e60942df6c26ca4ea995108d9e165292679dc94ea4ff55a7831ac0a47a938c45594733e48052aabf865284229751526

    • memory/628-62-0x0000000000000000-mapping.dmp
    • memory/1972-54-0x0000000076181000-0x0000000076183000-memory.dmp
      Filesize

      8KB

    • memory/1972-55-0x0000000074C30000-0x00000000751DB000-memory.dmp
      Filesize

      5.7MB

    • memory/2008-57-0x0000000000000000-mapping.dmp
    • memory/2008-61-0x0000000074C30000-0x00000000751DB000-memory.dmp
      Filesize

      5.7MB