Analysis

  • max time kernel
    146s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-11-2022 15:21

General

  • Target

    6cd8d4ae87a7c260ea6e16403fa761281d3073f466cc0217951d978c17020d2a.exe

  • Size

    669KB

  • MD5

    87fc357cfaa43f6766a5efef072871bc

  • SHA1

    ab77612d19ab9ec9f3bff9f13bf18cffc82799a7

  • SHA256

    6cd8d4ae87a7c260ea6e16403fa761281d3073f466cc0217951d978c17020d2a

  • SHA512

    2fbe4934c1d5485d12d4a395668778e765de66ec44afd06f8d702427dac7f8de13f4b3f954ef95f7f5cb27f6bc8f1db4933b56babfa6bab1575a66dfede5c436

  • SSDEEP

    12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DhKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWIKrKe

Malware Config

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker payload 2 IoCs
  • UAC bypass 3 TTPs 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 5 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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 AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6cd8d4ae87a7c260ea6e16403fa761281d3073f466cc0217951d978c17020d2a.exe
    "C:\Users\Admin\AppData\Local\Temp\6cd8d4ae87a7c260ea6e16403fa761281d3073f466cc0217951d978c17020d2a.exe"
    1⤵
    • UAC bypass
    • Modifies extensions of user files
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4352
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4876
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3968
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2016
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:796

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\svhost.exe

    Filesize

    669KB

    MD5

    87fc357cfaa43f6766a5efef072871bc

    SHA1

    ab77612d19ab9ec9f3bff9f13bf18cffc82799a7

    SHA256

    6cd8d4ae87a7c260ea6e16403fa761281d3073f466cc0217951d978c17020d2a

    SHA512

    2fbe4934c1d5485d12d4a395668778e765de66ec44afd06f8d702427dac7f8de13f4b3f954ef95f7f5cb27f6bc8f1db4933b56babfa6bab1575a66dfede5c436

  • C:\Users\Admin\AppData\Roaming\svhost.exe

    Filesize

    669KB

    MD5

    87fc357cfaa43f6766a5efef072871bc

    SHA1

    ab77612d19ab9ec9f3bff9f13bf18cffc82799a7

    SHA256

    6cd8d4ae87a7c260ea6e16403fa761281d3073f466cc0217951d978c17020d2a

    SHA512

    2fbe4934c1d5485d12d4a395668778e765de66ec44afd06f8d702427dac7f8de13f4b3f954ef95f7f5cb27f6bc8f1db4933b56babfa6bab1575a66dfede5c436

  • memory/2016-134-0x0000000000000000-mapping.dmp

  • memory/3968-133-0x0000000000000000-mapping.dmp

  • memory/4876-132-0x0000000000000000-mapping.dmp