Analysis

  • max time kernel
    155s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/02/2024, 04:30

General

  • Target

    8b66ccb77f02e2ff88e9934fe4ab648d.exe

  • Size

    402KB

  • MD5

    8b66ccb77f02e2ff88e9934fe4ab648d

  • SHA1

    3306d54395ab3b21d424fb73308a6ad37b9020bb

  • SHA256

    f47e6c4f9dbd723b2dd9db492822967c6257f2f502b57f342908ecaa64dfe4ba

  • SHA512

    425e9b883005f0b3e6513d7ea33aea06df9de6c4a64d88a9ba32f56013aa5f93fbc77f965d0e434c461107b71b27506a6e9aa750e207ce4ea70bdb6e37a626ca

  • SSDEEP

    6144:1maKVBGmE84IMNv55giU0pKiFYHxfx15RvOagakZBxkTN2gmeGcFnVQb/DAYbDgU:ySmLAuEY71fviagATFmebVQDcYcg

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

pdf

C2

hhhmach.ddns.net:1177

Mutex

5cd8f17f4086744065eb0992a09e05a2

Attributes
  • reg_key

    5cd8f17f4086744065eb0992a09e05a2

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 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 2 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 42 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8b66ccb77f02e2ff88e9934fe4ab648d.exe
    "C:\Users\Admin\AppData\Local\Temp\8b66ccb77f02e2ff88e9934fe4ab648d.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1820
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1820 -s 236
      2⤵
      • Program crash
      PID:1420
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c test.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3832
      • C:\Users\Admin\AppData\Local\Temp\test.exe
        test.exe
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:880
        • C:\Users\Admin\AppData\Local\Temp\Trojan.exe
          "C:\Users\Admin\AppData\Local\Temp\Trojan.exe"
          4⤵
          • Drops startup file
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:312
          • C:\Windows\SysWOW64\netsh.exe
            netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Trojan.exe" "Trojan.exe" ENABLE
            5⤵
            • Modifies Windows Firewall
            PID:3100
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1820 -s 164
      2⤵
      • Program crash
      PID:2284
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1820 -ip 1820
    1⤵
      PID:2112
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1820 -ip 1820
      1⤵
        PID:4864

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Temp\test.exe

              Filesize

              78KB

              MD5

              42c5854aa0709d8bf6c28ea82c67b9a5

              SHA1

              124ea473f0572009de85a4a46f361109f4fae7d6

              SHA256

              71e1add662041fee9ff0ddf0139154cf006538559af45f34047aac91efb1b8eb

              SHA512

              c0f4412f2237138b5b66ecc285d7f44bacd67ae23feb0a55561cd4f7850ee6b0fd1b1dac3d2725ed4932aaf155b0fbda284a69b07594789bdb4cbcf0f499d95a

            • memory/312-25-0x0000000075010000-0x00000000755C1000-memory.dmp

              Filesize

              5.7MB

            • memory/312-22-0x0000000075010000-0x00000000755C1000-memory.dmp

              Filesize

              5.7MB

            • memory/312-27-0x0000000000AD0000-0x0000000000AE0000-memory.dmp

              Filesize

              64KB

            • memory/312-26-0x0000000000AD0000-0x0000000000AE0000-memory.dmp

              Filesize

              64KB

            • memory/312-29-0x0000000000AD0000-0x0000000000AE0000-memory.dmp

              Filesize

              64KB

            • memory/312-28-0x0000000000AD0000-0x0000000000AE0000-memory.dmp

              Filesize

              64KB

            • memory/312-19-0x0000000075010000-0x00000000755C1000-memory.dmp

              Filesize

              5.7MB

            • memory/312-20-0x0000000000AD0000-0x0000000000AE0000-memory.dmp

              Filesize

              64KB

            • memory/312-31-0x0000000000AD0000-0x0000000000AE0000-memory.dmp

              Filesize

              64KB

            • memory/312-30-0x0000000000AD0000-0x0000000000AE0000-memory.dmp

              Filesize

              64KB

            • memory/880-21-0x0000000075010000-0x00000000755C1000-memory.dmp

              Filesize

              5.7MB

            • memory/880-8-0x00000000012F0000-0x0000000001300000-memory.dmp

              Filesize

              64KB

            • memory/880-7-0x0000000075010000-0x00000000755C1000-memory.dmp

              Filesize

              5.7MB

            • memory/880-6-0x0000000075010000-0x00000000755C1000-memory.dmp

              Filesize

              5.7MB

            • memory/1820-18-0x0000000000400000-0x00000000004FB000-memory.dmp

              Filesize

              1004KB

            • memory/1820-0-0x0000000000400000-0x00000000004FB000-memory.dmp

              Filesize

              1004KB

            • memory/1820-24-0x0000000000400000-0x00000000004FB000-memory.dmp

              Filesize

              1004KB

            • memory/1820-1-0x0000000000400000-0x00000000004FB000-memory.dmp

              Filesize

              1004KB