Analysis

  • max time kernel
    133s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 01:57

General

  • Target

    fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe

  • Size

    192KB

  • MD5

    9e8baf127b832943d4fae218ce90191a

  • SHA1

    449e6f1c2c79cb0ee4d43151bcaa6ecfd38efa70

  • SHA256

    fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0

  • SHA512

    9af9e3e30c34ecad41277c0bb8e27eabaf7fa05249153ffac20262af4ed3680a5a85cc5c192b04b3da3835396ef68e4e4a8b9123c663d8cf2f3a8681db7f8114

  • SSDEEP

    6144:b05H0JNb+gzTy9ZRTbPG9rYxf2hnbSayKTTfq+T/ur:A+uHG9rYxf2hnbSayKTTfq+T/ur

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

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

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

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 2 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\fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe
    "C:\Users\Admin\AppData\Local\Temp\fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:828
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "yar" /tr "C:\Users\Admin\AppData\Roaming\yar.exe"
      2⤵
      • Creates scheduled task(s)
      PID:4892
  • C:\Users\Admin\AppData\Roaming\yar.exe
    C:\Users\Admin\AppData\Roaming\yar.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3364
  • C:\Users\Admin\AppData\Roaming\yar.exe
    C:\Users\Admin\AppData\Roaming\yar.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3928

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\yar.exe.log

    Filesize

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

  • C:\Users\Admin\AppData\Roaming\yar.exe

    Filesize

    192KB

    MD5

    9e8baf127b832943d4fae218ce90191a

    SHA1

    449e6f1c2c79cb0ee4d43151bcaa6ecfd38efa70

    SHA256

    fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0

    SHA512

    9af9e3e30c34ecad41277c0bb8e27eabaf7fa05249153ffac20262af4ed3680a5a85cc5c192b04b3da3835396ef68e4e4a8b9123c663d8cf2f3a8681db7f8114

  • memory/828-0-0x00007FFD8DBE3000-0x00007FFD8DBE5000-memory.dmp

    Filesize

    8KB

  • memory/828-1-0x0000000000370000-0x00000000003A8000-memory.dmp

    Filesize

    224KB

  • memory/828-2-0x0000000002400000-0x0000000002406000-memory.dmp

    Filesize

    24KB

  • memory/828-3-0x00007FFD8DBE0000-0x00007FFD8E6A1000-memory.dmp

    Filesize

    10.8MB

  • memory/828-5-0x00007FFD8DBE3000-0x00007FFD8DBE5000-memory.dmp

    Filesize

    8KB

  • memory/828-6-0x00007FFD8DBE0000-0x00007FFD8E6A1000-memory.dmp

    Filesize

    10.8MB

  • memory/828-7-0x000000001BC70000-0x000000001BC7C000-memory.dmp

    Filesize

    48KB

  • memory/3364-10-0x00007FFD8DBE0000-0x00007FFD8E6A1000-memory.dmp

    Filesize

    10.8MB

  • memory/3364-12-0x00007FFD8DBE0000-0x00007FFD8E6A1000-memory.dmp

    Filesize

    10.8MB

  • memory/3364-13-0x00007FFD8DBE0000-0x00007FFD8E6A1000-memory.dmp

    Filesize

    10.8MB