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Analysis

  • max time kernel
    91s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/02/2023, 11:31

General

  • Target

    file.exe

  • Size

    1.9MB

  • MD5

    f11783c621c837cff58d4ea72b51f7aa

  • SHA1

    4f396927ce541ced4dfcfb86dbb4b105a8e39af6

  • SHA256

    a776ea1b4751e08775b98a3283c9cc91ccc07c20adfb158d2224ccc1d136bb40

  • SHA512

    72f2237796bf8aa3beef5925630f11216b098cd2f9b71f80e55433abf11317c54f14ce55937f0c6ff09144b6d649d632e554d17ea87ae84aa332235aacc8b420

  • SSDEEP

    49152:xaZ0Dg/Vi1AE3EZsSzSQD1ot7vkHjOM1MKFgTBsrpt2ALCgv2MR:QZ0g9ij2s56aM1MIOZov2MR

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:4876
    • C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp" /SL5="$801B8,1769494,97792,C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4848
      • C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe
        "C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4604
        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\1QtHYvpSifNuzY.exe
          4⤵
          • Executes dropped EXE
          PID:4388
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "FRec25.exe" /f & erase "C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3844
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "FRec25.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3420

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe

    Filesize

    1.9MB

    MD5

    2b709fdaf8add4eb6885a2bdd5d12ff8

    SHA1

    1ca9a1d9d7f2aad85b26bb3103d197262ae17082

    SHA256

    2cd90a6b7e91f4b9efc9abe33379c4f56af53f15d3b9a7294b0fa13a90263c6e

    SHA512

    2dd30c2f67095a2333c3983924b62e5f5f5394cbf21ea4711f4df89611a1c230251c8c26b19bb5b2d20193e35195fccbcf58ef56daf142cb8987b2cad2303a4e

  • C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe

    Filesize

    1.9MB

    MD5

    2b709fdaf8add4eb6885a2bdd5d12ff8

    SHA1

    1ca9a1d9d7f2aad85b26bb3103d197262ae17082

    SHA256

    2cd90a6b7e91f4b9efc9abe33379c4f56af53f15d3b9a7294b0fa13a90263c6e

    SHA512

    2dd30c2f67095a2333c3983924b62e5f5f5394cbf21ea4711f4df89611a1c230251c8c26b19bb5b2d20193e35195fccbcf58ef56daf142cb8987b2cad2303a4e

  • C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp

    Filesize

    696KB

    MD5

    d76329b30db65f61d55b20f36b56da26

    SHA1

    5e4c77b723ae8f05b3ae6afeee735a4355f00663

    SHA256

    229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

    SHA512

    a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

  • C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp

    Filesize

    696KB

    MD5

    d76329b30db65f61d55b20f36b56da26

    SHA1

    5e4c77b723ae8f05b3ae6afeee735a4355f00663

    SHA256

    229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

    SHA512

    a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

  • C:\Users\Admin\AppData\Local\Temp\is-D3JP0.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\1QtHYvpSifNuzY.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\1QtHYvpSifNuzY.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/4604-142-0x0000000000400000-0x00000000013DB000-memory.dmp

    Filesize

    15.9MB

  • memory/4604-144-0x0000000000400000-0x00000000013DB000-memory.dmp

    Filesize

    15.9MB

  • memory/4604-143-0x0000000000400000-0x00000000013DB000-memory.dmp

    Filesize

    15.9MB

  • memory/4604-148-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/4604-152-0x0000000000400000-0x00000000013DB000-memory.dmp

    Filesize

    15.9MB

  • memory/4604-155-0x0000000000400000-0x00000000013DB000-memory.dmp

    Filesize

    15.9MB

  • memory/4876-132-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4876-151-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4876-134-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4876-156-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB