Resubmissions

03-01-2022 15:51

220103-tagh5sbdh2 10

Analysis

  • max time kernel
    600s
  • max time network
    576s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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:2268
    • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
      "C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe"
      2⤵
      • Executes dropped EXE
      PID:3112

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

    c75b82736d4640177d75e74ca1470c87

    SHA1

    12582a15e9e1fbcd153b9eb417aa7f38d0ae92f7

    SHA256

    42c546861dc7a7e0cd1148878714ea5b276c1f226f2ef0417abb67ad863e18b3

    SHA512

    086b4a9300c55f12ca18212ae2bcb0934fe7ea96657821b2f9485355958eb17b3bf3fea1fbe0f0afb5e8aa0185d9cc16dea775af72cd10a3a4a158057fd64ee9

  • memory/2268-17-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-55-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-1-0x0000000002A50000-0x0000000002A90000-memory.dmp

    Filesize

    256KB

  • memory/2268-6-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-7-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-8-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-3-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-14-0x0000000000D30000-0x0000000000DFA000-memory.dmp

    Filesize

    808KB

  • memory/2268-2-0x0000000000D30000-0x0000000000DFA000-memory.dmp

    Filesize

    808KB

  • memory/2268-27-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-5-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-4-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-16-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-30-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-32-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-34-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-37-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-42-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-45-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-47-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-48-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-51-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/2268-25-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB