Overview

overview

10

Static

static

8f504845a4...4b.exe

windows7_x64

10

8f504845a4...4b.exe

windows10-2004_x64

8

Analysis

  • max time kernel
    160s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    29-03-2022 22:11

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General

  • Target

    8f504845a4bca5527b3e3d283140d250e7c98effb4ab2811377d8240407fb24b.exe

  • Size

    140KB

  • MD5

    cb88e2a5631c6ef481af0803950c5e00

  • SHA1

    f99b8bf66f2629e313e04e8a4cce7a69758fa647

  • SHA256

    8f504845a4bca5527b3e3d283140d250e7c98effb4ab2811377d8240407fb24b

  • SHA512

    9ba281c90ed85b65cfb9cdddb82d7b3e65403fd8869bd15cc65bbe8dbb82bcab2084517e6698942864b8ad018a13666622a90fd2ad97e6ef60ff8993d9da5fb5

Score
8/10
evasionpersistence

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 31 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8f504845a4bca5527b3e3d283140d250e7c98effb4ab2811377d8240407fb24b.exe
    "C:\Users\Admin\AppData\Local\Temp\8f504845a4bca5527b3e3d283140d250e7c98effb4ab2811377d8240407fb24b.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1016
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2272
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
          PID:4108

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Modify Existing Service

    1
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

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

      140KB

      MD5

      cb88e2a5631c6ef481af0803950c5e00

      SHA1

      f99b8bf66f2629e313e04e8a4cce7a69758fa647

      SHA256

      8f504845a4bca5527b3e3d283140d250e7c98effb4ab2811377d8240407fb24b

      SHA512

      9ba281c90ed85b65cfb9cdddb82d7b3e65403fd8869bd15cc65bbe8dbb82bcab2084517e6698942864b8ad018a13666622a90fd2ad97e6ef60ff8993d9da5fb5

      Download Submit
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      Filesize

      140KB

      MD5

      cb88e2a5631c6ef481af0803950c5e00

      SHA1

      f99b8bf66f2629e313e04e8a4cce7a69758fa647

      SHA256

      8f504845a4bca5527b3e3d283140d250e7c98effb4ab2811377d8240407fb24b

      SHA512

      9ba281c90ed85b65cfb9cdddb82d7b3e65403fd8869bd15cc65bbe8dbb82bcab2084517e6698942864b8ad018a13666622a90fd2ad97e6ef60ff8993d9da5fb5

      Download Submit
    • memory/1016-130-0x0000000000710000-0x000000000073C000-memory.dmp
      Filesize

      176KB

      Download
    • memory/1016-131-0x0000000005070000-0x000000000510C000-memory.dmp
      Filesize

      624KB

      Download
    • memory/1016-132-0x00000000056E0000-0x0000000005C84000-memory.dmp
      Filesize

      5.6MB

      Download
    • memory/1016-133-0x00000000051D0000-0x0000000005262000-memory.dmp
      Filesize

      584KB

      Download
    • memory/1016-134-0x0000000005180000-0x000000000518A000-memory.dmp
      Filesize

      40KB

      Download
    • memory/1016-135-0x0000000005320000-0x0000000005376000-memory.dmp
      Filesize

      344KB

      Download
    • memory/2272-136-0x0000000000000000-mapping.dmp
      Download
    • memory/4108-139-0x0000000000000000-mapping.dmp
      Download