Analysis

  • max time kernel
    50s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    05-04-2023 21:17

General

  • Target

    gcleaner.exe

  • Size

    324KB

  • MD5

    f0fdfaad6edf6b629ffd261429dcd756

  • SHA1

    e364e2f87e231c6eb6a733d69f1b9033370f3107

  • SHA256

    3fb631fa531f1393af9469aabcb808eab87eb3c3fac3f901854b75fe4e806d0e

  • SHA512

    8be7750477b6f3d3a962931b57f90a4f7193fbbe28ad725ec090c816f85b7c30bf41c11455e4f2e3f1c9cda6f50925dc8575947e72b65e6aae003b912b4629b0

  • SSDEEP

    6144:msYSsp5yL23j0Tj4M6aW4I7NMk5B8k3qX/SCm63P8KAO8XNESqAguOSfmiCQsmG:msYSsp5R3j0Tj4XaW4I7NM0B9a04yHLg

Score
7/10

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\gcleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\gcleaner.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1712
    • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5QtdF.exe
      2⤵
      • Executes dropped EXE
      PID:1452
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "gcleaner.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\gcleaner.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1776
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "gcleaner.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1624

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\EV74ZOZO\dll[2].htm
    Filesize

    1B

    MD5

    cfcd208495d565ef66e7dff9f98764da

    SHA1

    b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

    SHA256

    5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

    SHA512

    31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5QtdF.exe
    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5QtdF.exe
    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1712-62-0x0000000010000000-0x000000001001B000-memory.dmp
    Filesize

    108KB