Analysis

  • max time kernel
    62s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-03-2023 04:56

General

  • Target

    file.exe

  • Size

    1.8MB

  • MD5

    87ab999411c98cd71165d80cc28ccdf7

  • SHA1

    a87c9617638c5b0800a771cc9b743c2d31c605db

  • SHA256

    a9f02f4197438a00803cc5797895b65016c05c310a306d3b52ffe7c8b0643893

  • SHA512

    155e44700815c7feeae27d0a62d54cc396c435d13d866b7eb5b45c5009733fb275a1adb85a80f3e044f46e7d147a5ed24d4678905bda40e8b89b3080b89b759c

  • SSDEEP

    49152:EGlJfs0l7JOzFt98Uyz/oE0xpma7SYtqfAms4KE5dlLYp:5H7KFtCz/o18aGYt6AmhPYp

Malware Config

Extracted

Family

gcleaner

C2

45.12.253.56

45.12.253.72

45.12.253.98

45.12.253.75

Signatures

  • GCleaner

    GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 9 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Users\Admin\AppData\Local\Temp\is-55EDI.tmp\is-EMHRP.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-55EDI.tmp\is-EMHRP.tmp" /SL4 $8006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1623486 52736
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1240
      • C:\Program Files (x86)\FJGsoftFR\FRec327\FRec327.exe
        "C:\Program Files (x86)\FJGsoftFR\FRec327\FRec327.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3536
        • C:\Users\Admin\AppData\Roaming\{0338073a-b1a2-11ed-9ee7-806e6f6e6963}\DUsZavR.exe
          4⤵
          • Executes dropped EXE
          PID:4676
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "FRec327.exe" /f & erase "C:\Program Files (x86)\FJGsoftFR\FRec327\FRec327.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2848
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "FRec327.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:4960

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\FJGsoftFR\FRec327\FRec327.exe
    Filesize

    1.6MB

    MD5

    b25ae2bbd8cddf56825abaf223c4c3ab

    SHA1

    f109415d40fcc61379cb77c8b0a351bb83895883

    SHA256

    62d4029436cf1c0836df0eddef67184efc60627254269b52d3e312ed79e69085

    SHA512

    c0753d444561004246b912affd2c91a227dfc4e283a7bd6c5cf2cc9560a700c116a13a25fe720a68e559d3477b25211df33a2fa16ee1007fac3103b5f262129f

  • C:\Program Files (x86)\FJGsoftFR\FRec327\FRec327.exe
    Filesize

    1.6MB

    MD5

    b25ae2bbd8cddf56825abaf223c4c3ab

    SHA1

    f109415d40fcc61379cb77c8b0a351bb83895883

    SHA256

    62d4029436cf1c0836df0eddef67184efc60627254269b52d3e312ed79e69085

    SHA512

    c0753d444561004246b912affd2c91a227dfc4e283a7bd6c5cf2cc9560a700c116a13a25fe720a68e559d3477b25211df33a2fa16ee1007fac3103b5f262129f

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\6K3GJRJ1\dll[1].htm
    Filesize

    1B

    MD5

    cfcd208495d565ef66e7dff9f98764da

    SHA1

    b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

    SHA256

    5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

    SHA512

    31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

  • C:\Users\Admin\AppData\Local\Temp\is-55EDI.tmp\is-EMHRP.tmp
    Filesize

    659KB

    MD5

    63bdf487b26c0886dbced14bab4d4257

    SHA1

    e3621d870aa54d552861f1c71dea1fb36d71def6

    SHA256

    ca5e816fa95cbcd2a880f2c319d3ddf09686e96ee633af63a396969e5e62335a

    SHA512

    b433e540c9da175efdd09d44be39c563176046d89aa03edcc43e3582aa1f180e40e283503d152a46e07d4e77f8fa18b76118e425961b507ad5ca3864c39a7c40

  • C:\Users\Admin\AppData\Local\Temp\is-55EDI.tmp\is-EMHRP.tmp
    Filesize

    659KB

    MD5

    63bdf487b26c0886dbced14bab4d4257

    SHA1

    e3621d870aa54d552861f1c71dea1fb36d71def6

    SHA256

    ca5e816fa95cbcd2a880f2c319d3ddf09686e96ee633af63a396969e5e62335a

    SHA512

    b433e540c9da175efdd09d44be39c563176046d89aa03edcc43e3582aa1f180e40e283503d152a46e07d4e77f8fa18b76118e425961b507ad5ca3864c39a7c40

  • C:\Users\Admin\AppData\Local\Temp\is-SVNBJ.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Roaming\{0338073a-b1a2-11ed-9ee7-806e6f6e6963}\DUsZavR.exe
    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{0338073a-b1a2-11ed-9ee7-806e6f6e6963}\DUsZavR.exe
    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1240-160-0x00000000021F0000-0x00000000021F1000-memory.dmp
    Filesize

    4KB

  • memory/1240-180-0x0000000000400000-0x00000000004B4000-memory.dmp
    Filesize

    720KB

  • memory/1240-198-0x0000000000400000-0x00000000004B4000-memory.dmp
    Filesize

    720KB

  • memory/1640-178-0x0000000000400000-0x0000000000413000-memory.dmp
    Filesize

    76KB

  • memory/1640-199-0x0000000000400000-0x0000000000413000-memory.dmp
    Filesize

    76KB

  • memory/1640-133-0x0000000000400000-0x0000000000413000-memory.dmp
    Filesize

    76KB

  • memory/3536-166-0x0000000000400000-0x000000000139B000-memory.dmp
    Filesize

    15.6MB

  • memory/3536-174-0x0000000010000000-0x000000001001B000-memory.dmp
    Filesize

    108KB

  • memory/3536-182-0x0000000000400000-0x000000000139B000-memory.dmp
    Filesize

    15.6MB

  • memory/3536-165-0x0000000000400000-0x000000000139B000-memory.dmp
    Filesize

    15.6MB

  • memory/3536-197-0x0000000000400000-0x000000000139B000-memory.dmp
    Filesize

    15.6MB