Resubmissions

03-01-2022 15:51

220103-tagh5sbdh2 10

Analysis

  • max time kernel
    1200s
  • max time network
    1180s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    14-04-2024 13:36

General

  • Target

    kr.exe

  • Size

    786KB

  • MD5

    899dc9cc6e7516536bf5e816e8cecf55

  • SHA1

    6c07fc00ed2202798194749aa8037bb0ad38bb00

  • SHA256

    5f84ad4413ad6dcdea0cb3aa206cc4df29e1bad9d9598912c323c931d568ac90

  • SHA512

    445016f0e37ee3ecec319b73713d083711608c044f855e16268f89c88d460e95d85b79d375534ac6b7a4a0e869c49470d49b7e325ff0507c550107d593ae688c

  • SSDEEP

    12288:vyxPJa2s86jofrWEuxjcZxyPq8tf8sQ+PRtj3lDsmMHj3N6eiaFmhL+JigR:vyxPJ/s86szWEuKiflOmMDhPEhL+lR

Score
10/10

Malware Config

Signatures

  • Drops startup file 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Uses Tor communications 1 TTPs

    Malware can proxy its traffic through Tor for more anonymity.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\kr.exe
    "C:\Users\Admin\AppData\Local\Temp\kr.exe"
    1⤵
    • Drops startup file
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3464
    • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
      "C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe"
      2⤵
      • Executes dropped EXE
      PID:2256

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe

    Filesize

    3KB

    MD5

    b4cd27f2b37665f51eb9fe685ec1d373

    SHA1

    7f08febf0fdb7fc9f8bf35a10fb11e7de431abe0

    SHA256

    91f1023142b7babf6ff75dad984c2a35bde61dc9e61f45483f4b65008576d581

    SHA512

    e025f65224d78f5fd0abebe281ac0d44a385b2641e367cf39eed6aefada20a112ac47f94d7febc4424f1db6a6947bac16ff83ef93a8d745b3cddfdbe64c49a1e

  • C:\Users\Admin\AppData\Local\Temp\x64btit.txt

    Filesize

    28B

    MD5

    6c2e94557a9d2111b4ab203bc668f621

    SHA1

    ccafe709c45a8786bc962a79209a4de4d685b3d8

    SHA256

    e6e48d7d4ec5708cabaec6e4164d875100385c211b313af49d3816492a49588b

    SHA512

    b37a87bf5f2d6267d02ab34fe15bfbd4c71dc1f51228f2f3e0db02e3d4d69dd405d717ea118b342b7209c711fc5b992db03799ae76e6c1f5dcd04bde40d86e40

  • memory/3464-6-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-21-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-5-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-2-0x00000000002C0000-0x000000000038A000-memory.dmp

    Filesize

    808KB

  • memory/3464-8-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-7-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-3-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-14-0x00000000002C0000-0x000000000038A000-memory.dmp

    Filesize

    808KB

  • memory/3464-1-0x0000000002CE0000-0x0000000002D26000-memory.dmp

    Filesize

    280KB

  • memory/3464-16-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-17-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-4-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-23-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-27-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-29-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-30-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-33-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-35-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-37-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-40-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB

  • memory/3464-45-0x0000000002D30000-0x0000000002DD9000-memory.dmp

    Filesize

    676KB