Analysis

  • max time kernel
    140s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-12-2023 10:58

General

  • Target

    8102e9bee1323da3bc9ddd5232f8bcb3843e1ddd7bbf7859ee9f167b2ab1593d.exe

  • Size

    4.0MB

  • MD5

    9ae7830ff4ead1194119e4151b09d7b6

  • SHA1

    e36741257c0d133c59bebf2aa3fe33344d4e5694

  • SHA256

    8102e9bee1323da3bc9ddd5232f8bcb3843e1ddd7bbf7859ee9f167b2ab1593d

  • SHA512

    e40ca551ba98869fc8aafdec3b8521d09c49d4e094c17f9df60a9056fab3cfce08de5c961b34daac46c1a4b274733d4e5a36ef024baa9322baf1ea64c1bbe241

  • SSDEEP

    49152:C8y4+H/MA9KvdXjuvugsDwy9p6a7ZIcQ2R8+06QlCQ1U2V+6kYS3e+/skGV8rOv1:a/MOeDp6l08+06QxUZ6kb/skbrOO

Malware Config

Signatures

  • FatalRat

    FatalRat is a modular infostealer family written in C++ first appearing in June 2021.

  • Fatal Rat payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\8102e9bee1323da3bc9ddd5232f8bcb3843e1ddd7bbf7859ee9f167b2ab1593d.exe
    "C:\Users\Admin\AppData\Local\Temp\8102e9bee1323da3bc9ddd5232f8bcb3843e1ddd7bbf7859ee9f167b2ab1593d.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4220
    • C:\Program Files (x86)\Funshion\DySDKController.exe
      "C:\Program Files (x86)\Funshion\DySDKController.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5112

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Funshion\DyCrashRpt.dll

    Filesize

    155KB

    MD5

    068a45ed0c24060c3a8d45be44087f65

    SHA1

    fc7b7a4f021cb71b6a81daf62046d3fd5dc1653a

    SHA256

    5c5f0030940704c174600b3ded8d90a168b2cb406bfbd1c5de1df3057de42f0e

    SHA512

    54f5871515667708cd47980a96a57aa1386887ffb343360a2b2bd05da53e0474ff175818657ae39a4f3516bb191e50961a3b84538f8ff3296b773abb38e0d447

  • C:\Program Files (x86)\Funshion\DySDKController.exe

    Filesize

    1.1MB

    MD5

    5441bc3e3ceb2162a65cbfb4b6e7acd3

    SHA1

    103a0ec0f23e90def158eff9be7f63f6ca9af420

    SHA256

    90fe10bb10fbc95285696423e0ba4bfc10f4dcb63ea8d94fe29871036e4859f6

    SHA512

    f76ae8e1e43223e1fa06e5911b06dc7b2b3d60e3758fc5201c4dbd8df601b59be11e65f42ffe43a5823a71aa1cc328c7a2f625ca50893b1101d73d59b13b4ed4

  • C:\ProgramData\afd.bin

    Filesize

    198KB

    MD5

    b13ffe8963d3f536bcbd88d4f6ebae93

    SHA1

    dcfdb4fa21a16dd417672c78ccdea8d5904c5f5e

    SHA256

    ab766c0fbcc5610ff5dca17b085d0ef5ed96ef23f0fc8b6a9e8dbe40821830c9

    SHA512

    0a6e3bf78aa2196dda368b3492bd017b4ea562ed0763359619faf6967aae1c88739fb662771bdce3084326e0db5ce0f55f9172f1a598e2d42c489d03500b2672

  • memory/5112-21-0x0000000075B90000-0x0000000075BB8000-memory.dmp

    Filesize

    160KB

  • memory/5112-23-0x0000000010000000-0x0000000010031000-memory.dmp

    Filesize

    196KB

  • memory/5112-25-0x0000000000C30000-0x0000000000C94000-memory.dmp

    Filesize

    400KB

  • memory/5112-28-0x0000000002690000-0x00000000026BA000-memory.dmp

    Filesize

    168KB

  • memory/5112-33-0x0000000075B90000-0x0000000075BB8000-memory.dmp

    Filesize

    160KB