Resubmissions

03-01-2022 15:51

220103-tagh5sbdh2 10

Analysis

  • max time kernel
    152s
  • max time network
    145s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    03-01-2022 15:51

General

  • Target

    kr.exe

  • Size

    786KB

  • MD5

    899dc9cc6e7516536bf5e816e8cecf55

  • SHA1

    6c07fc00ed2202798194749aa8037bb0ad38bb00

  • SHA256

    5f84ad4413ad6dcdea0cb3aa206cc4df29e1bad9d9598912c323c931d568ac90

  • SHA512

    445016f0e37ee3ecec319b73713d083711608c044f855e16268f89c88d460e95d85b79d375534ac6b7a4a0e869c49470d49b7e325ff0507c550107d593ae688c

Score
10/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Drops startup file 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). Likely ransomware behaviour.

  • 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:3116
    • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
      "C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe"
      2⤵
      • Executes dropped EXE
      PID:1476

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/3116-115-0x00000000008B0000-0x000000000097A000-memory.dmp

    Filesize

    808KB

  • memory/3116-116-0x00000000034A0000-0x00000000034E1000-memory.dmp

    Filesize

    260KB

  • memory/3116-117-0x0000000000400000-0x00000000004A9000-memory.dmp

    Filesize

    676KB