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Analysis

  • max time kernel
    140s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/12/2023, 13:25

General

  • Target

    37eadb2a6a140992e449eabfb0835d8f.exe

  • Size

    402KB

  • MD5

    37eadb2a6a140992e449eabfb0835d8f

  • SHA1

    77cc4134b54cc4a07624e7b332713a08b7efc617

  • SHA256

    4a666cb1c605e9318e069c60f68589c67eeb6b30c49975a9189f15f2a6aab463

  • SHA512

    d521f6cb1ab2723bafc5093eb69c326ce65f48a6961eddb8107159663e60104cf38d9baaea18013939ced450d0e8b63960619f2a40c7cdb715226da51b769e24

  • SSDEEP

    6144:kmaKVBGmE84IMNv55giU0pKiFYHxfx15RvOagakZBxkTN2gmeGcFnVQb/DAYbDgW:NSmLAuEY71fviagATFmebVQDcYc6

Score
10/10

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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • UPX packed file 4 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\37eadb2a6a140992e449eabfb0835d8f.exe
    "C:\Users\Admin\AppData\Local\Temp\37eadb2a6a140992e449eabfb0835d8f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4584
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c test.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2996
      • C:\Users\Admin\AppData\Local\Temp\test.exe
        test.exe
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:3896
        • C:\Users\Admin\AppData\Local\Temp\Trojan.exe
          "C:\Users\Admin\AppData\Local\Temp\Trojan.exe"
          4⤵
          • Executes dropped EXE
          PID:1356
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 164
      2⤵
      • Program crash
      PID:4020
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4584 -ip 4584
    1⤵
      PID:2888
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4584 -ip 4584
      1⤵
        PID:3196

      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/1356-26-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/1356-31-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/1356-27-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/3896-11-0x0000000001670000-0x0000000001680000-memory.dmp

        Filesize

        64KB

      • memory/3896-10-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/3896-14-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/3896-15-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/3896-16-0x0000000001670000-0x0000000001680000-memory.dmp

        Filesize

        64KB

      • memory/3896-8-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/3896-30-0x0000000074260000-0x0000000074811000-memory.dmp

        Filesize

        5.7MB

      • memory/4584-0-0x0000000000400000-0x00000000004FA000-memory.dmp

        Filesize

        1000KB

      • memory/4584-3-0x0000000000400000-0x00000000004FA000-memory.dmp

        Filesize

        1000KB

      • memory/4584-1-0x0000000000400000-0x00000000004FA000-memory.dmp

        Filesize

        1000KB

      • memory/4584-32-0x0000000000400000-0x00000000004FA000-memory.dmp

        Filesize

        1000KB