Resubmissions

03-01-2022 15:51

220103-tagh5sbdh2 10

Analysis

  • max time kernel
    1800s
  • max time network
    1793s
  • 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:1116
    • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
      "C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe"
      2⤵
      • Executes dropped EXE
      PID:1128

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

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

    10fc92401fc8aaf3a24c575e7ba5086f

    SHA1

    5f20b06937c1eed18323c4750fdfb1180fa78f04

    SHA256

    7c466e28354ce28620015397c24477a434439c93f4eaf4a4b9cc57dce354b1c6

    SHA512

    714a4a6f45b8d2f7c2425649e7b4be8613ef62c3f150058d515b52f2903acd2bddb3bac472ae5394ecb252bb9ecddc2dc4c35aae25463f78bd03b12b32a970f5

  • memory/1116-6-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-18-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-5-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-1-0x0000000003680000-0x00000000036C6000-memory.dmp

    Filesize

    280KB

  • memory/1116-7-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-8-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-3-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-14-0x0000000000D30000-0x0000000000DFA000-memory.dmp

    Filesize

    808KB

  • memory/1116-2-0x0000000000D30000-0x0000000000DFA000-memory.dmp

    Filesize

    808KB

  • memory/1116-16-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-17-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-4-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-20-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-26-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-28-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-30-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-33-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-35-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-38-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-40-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB

  • memory/1116-73-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB