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Analysis

  • max time kernel
    150s
  • max time network
    93s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/10/2024, 11:09

General

  • Target

    3b672e22ae482beb9b219f992a8f78202c1b3f8c688a04783e2a2555e330bbc8N.exe

  • Size

    2.4MB

  • MD5

    396cf3b47c6bab1f66b34794ac38e130

  • SHA1

    350c33f41d187056ecaca8a81f21f7b14b9139ff

  • SHA256

    3b672e22ae482beb9b219f992a8f78202c1b3f8c688a04783e2a2555e330bbc8

  • SHA512

    4ff32765f9a658899e53281ba55cc3be0a6075b886bc862a4b8eb70bee4a58cd341a18056bea90a6d9fb72a34abbd0392a9a0924dbd80c9413bdc215a02ccecc

  • SSDEEP

    49152:KGlWC3YlQt8CWVQ7VFGogWAcF8jH7VaOtXcZ:8Q3YI+W

Score
9/10

Malware Config

Signatures

  • Renames multiple (5127) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3b672e22ae482beb9b219f992a8f78202c1b3f8c688a04783e2a2555e330bbc8N.exe
    "C:\Users\Admin\AppData\Local\Temp\3b672e22ae482beb9b219f992a8f78202c1b3f8c688a04783e2a2555e330bbc8N.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4884
    • C:\Windows\SysWOW64\Zombie.exe
      "C:\Windows\system32\Zombie.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:4224
    • C:\Users\Admin\AppData\Local\Temp\_NisSrv.exe
      "_NisSrv.exe"
      2⤵
      • Executes dropped EXE
      PID:1852

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\$Recycle.Bin\S-1-5-21-3756129449-3121373848-4276368241-1000\desktop.ini.exe

    Filesize

    39KB

    MD5

    4446355b8de071b18b9cf310b38d8bd5

    SHA1

    988fd6a2732876c878cdb4bc3dc753f36d08195b

    SHA256

    dd4e113f5d47b931402ab3560ff588b149818595c370b63b6aa6b5bc6391239f

    SHA512

    a1275622bbd1e9d56efee4960efc4e863e8cb2fa4745c76cbc889e2a6ebb082e3c7f9c766caa46d5a857b282dd0f0b8d1e30fc12498bec81fee2cc811bc67e00

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

    Filesize

    2.4MB

    MD5

    826bf13d3fefe2369ceec3e679d96b7c

    SHA1

    c5fc719289ae948df373302bde739a0ac28ad573

    SHA256

    3aabfccd7697584ef580225d8a78f4b1043f319215c3cbc3c461b398ada6e0b3

    SHA512

    47d463df0b646960ae89288c95322f1e998bc479c71b2ad167ce9d194c629080628a2384c6003574aab1894a7d178b0eec3457f0d0425cc7c4ca2d67837e7e14

  • C:\Windows\SysWOW64\Zombie.exe

    Filesize

    38KB

    MD5

    4db2c8e796fe82f4abbfc6a5d87012a9

    SHA1

    777a5b53458f823eec836727169cdfb33e38f78e

    SHA256

    dbbc521378d4e38f9d3648a5e86df05e9ee0d34af3a59d743d227330efe970ab

    SHA512

    f41bf6bed7a03ff0f11680512cafe4398f407b0776ba607c24b1df18f17ccd2c1537ece6e43b9964efe3116f5d20b09866a49dc6cec19cec4de1eda1dd6b3de7