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Overview

overview

10

Static

static

bf7b28989d...bd.exe

windows7-x64

10

bf7b28989d...bd.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    190s
  • max time network
    195s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/10/2022, 23:50

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General

  • Target

    bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd.exe

  • Size

    684KB

  • MD5

    a2956dfca9be381f1184f9ce81845ab0

  • SHA1

    a92d3c8c18b08f1fa2be87d850799c6c271bb8ec

  • SHA256

    bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd

  • SHA512

    4fd4c221910cb6d1f577fa427e479ba677c77c592f6b0cca6cb94081357cc56c185df5d233614a1bd867de60520b3320c8b5e0fce7297504e2cda5985bc07789

  • SSDEEP

    12288:UpgvmzFHi0mo5aH0qMzd5807F4PJQPDHvd:UpgvOHi0mGaH0qSdPFq4V

Score
10/10
evasionpersistencetrojan

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
    persistence
  • UAC bypass 3 TTPs 12 IoCs
    evasiontrojan
  • Adds policy Run key to start application 2 TTPs 26 IoCs
    persistence
  • Disables RegEdit via registry modification 6 IoCs
    evasion
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 64 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
    evasiontrojan
  • Looks up external IP address via web service 3 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • System policy modification 1 TTPs 39 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd.exe
    "C:\Users\Admin\AppData\Local\Temp\bf7b28989ddb52cfbbc4bc58acdd33121fe8d95f081185f825ca05085789a5bd.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds policy Run key to start application
    • Disables RegEdit via registry modification
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3320
    • C:\Users\Admin\AppData\Local\Temp\cbgpt.exe
      "C:\Users\Admin\AppData\Local\Temp\cbgpt.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:1480
    • C:\Users\Admin\AppData\Local\Temp\cbgpt.exe
      "C:\Users\Admin\AppData\Local\Temp\cbgpt.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Modifies registry class
      • System policy modification
      PID:2324
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:3828

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\cbgpt.exe
      Filesize

      1.2MB

      MD5

      38b986b1146fc342647e90847e6b6cef

      SHA1

      af973b604ea10d87e3b68fee1e05536b699af79d

      SHA256

      538cf37226e5871b4e7d96f3d639bc5708a3cf2dcd52616029387f40684fc1dd

      SHA512

      a65b608c767244affe2f9c436d270998c56098b99522bc564c85cfd2adf4cb79d6172212ad5877859637bf265ada75bea479b961ae07769cab3b13329ca688d4

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\cbgpt.exe
      Filesize

      1.2MB

      MD5

      38b986b1146fc342647e90847e6b6cef

      SHA1

      af973b604ea10d87e3b68fee1e05536b699af79d

      SHA256

      538cf37226e5871b4e7d96f3d639bc5708a3cf2dcd52616029387f40684fc1dd

      SHA512

      a65b608c767244affe2f9c436d270998c56098b99522bc564c85cfd2adf4cb79d6172212ad5877859637bf265ada75bea479b961ae07769cab3b13329ca688d4

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\cbgpt.exe
      Filesize

      1.2MB

      MD5

      38b986b1146fc342647e90847e6b6cef

      SHA1

      af973b604ea10d87e3b68fee1e05536b699af79d

      SHA256

      538cf37226e5871b4e7d96f3d639bc5708a3cf2dcd52616029387f40684fc1dd

      SHA512

      a65b608c767244affe2f9c436d270998c56098b99522bc564c85cfd2adf4cb79d6172212ad5877859637bf265ada75bea479b961ae07769cab3b13329ca688d4

      Download Submit