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Analysis

  • max time kernel
    58s
  • max time network
    59s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    13/01/2023, 16:17

General

  • Target

    file.exe

  • Size

    1.3MB

  • MD5

    3e9fdfad98a957c88dc532647c366c9e

  • SHA1

    c52a705c8320ba86855b97ad27edfba382fdee23

  • SHA256

    c302a2c99906b5b93406bafe03fa08f845d545bd8c5799c9e3c2fa4209c091b6

  • SHA512

    be9f04fb9ffbf28ce6c3e75543e45537770a7f68f36e85cb6e10065e6d18b26f68f27f933c9a80982e1d362edd9af60921ea339bf6281ffd7b6008519fe75a25

  • SSDEEP

    24576:g20hhVV4CHR+zYrYnIJv1S8MAlzP6yLYy+wcNiWI4hdUdfRLYf+kATuCqtn/:g2QVdoYsI/K4zPoFwNuAd1kATuCE/

Malware Config

Extracted

Family

gcleaner

C2

45.139.105.171

85.31.46.167

107.182.129.235

171.22.30.106

Signatures

  • GCleaner

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 6 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 17 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Users\Admin\AppData\Local\Temp\is-E8UUG.tmp\file.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-E8UUG.tmp\file.tmp" /SL5="$70022,1131115,233984,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:1676
      • C:\Program Files (x86)\Nit Files\NitFiles451.exe
        "C:\Program Files (x86)\Nit Files\NitFiles451.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1756
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\XUJzX.exe
          4⤵
          • Executes dropped EXE
          PID:1748
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "NitFiles451.exe" /f & erase "C:\Program Files (x86)\Nit Files\NitFiles451.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:316
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "NitFiles451.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:600

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Nit Files\NitFiles451.exe

    Filesize

    1.9MB

    MD5

    e35036e92fe3426d2e218d1a3cc7ea8b

    SHA1

    00f5ee91d93e2179a6a641369485586a30f25aaf

    SHA256

    5359910f896fb788ac375dc59525163c478a1cf1ef3358598de5c83763d7f8b6

    SHA512

    c7cafa9cd4d4ee6154114dfa697f5b88d851e0b3fe8affcf6c2342a41ce6d2901121929ba73745f71a7f18e05e39641f1be7912932c5158257c83532f557b51f

  • C:\Program Files (x86)\Nit Files\NitFiles451.exe

    Filesize

    1.9MB

    MD5

    e35036e92fe3426d2e218d1a3cc7ea8b

    SHA1

    00f5ee91d93e2179a6a641369485586a30f25aaf

    SHA256

    5359910f896fb788ac375dc59525163c478a1cf1ef3358598de5c83763d7f8b6

    SHA512

    c7cafa9cd4d4ee6154114dfa697f5b88d851e0b3fe8affcf6c2342a41ce6d2901121929ba73745f71a7f18e05e39641f1be7912932c5158257c83532f557b51f

  • C:\Users\Admin\AppData\Local\Temp\is-E8UUG.tmp\file.tmp

    Filesize

    849KB

    MD5

    56c525b0e7751035562a3bd35096b17d

    SHA1

    befb8a8e73e296e95412b319bc20f76fb382d525

    SHA256

    6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

    SHA512

    75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

  • C:\Users\Admin\AppData\Local\Temp\is-E8UUG.tmp\file.tmp

    Filesize

    849KB

    MD5

    56c525b0e7751035562a3bd35096b17d

    SHA1

    befb8a8e73e296e95412b319bc20f76fb382d525

    SHA256

    6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

    SHA512

    75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Nit Files\NitFiles451.exe

    Filesize

    1.9MB

    MD5

    e35036e92fe3426d2e218d1a3cc7ea8b

    SHA1

    00f5ee91d93e2179a6a641369485586a30f25aaf

    SHA256

    5359910f896fb788ac375dc59525163c478a1cf1ef3358598de5c83763d7f8b6

    SHA512

    c7cafa9cd4d4ee6154114dfa697f5b88d851e0b3fe8affcf6c2342a41ce6d2901121929ba73745f71a7f18e05e39641f1be7912932c5158257c83532f557b51f

  • \Users\Admin\AppData\Local\Temp\is-E8UUG.tmp\file.tmp

    Filesize

    849KB

    MD5

    56c525b0e7751035562a3bd35096b17d

    SHA1

    befb8a8e73e296e95412b319bc20f76fb382d525

    SHA256

    6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

    SHA512

    75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

  • \Users\Admin\AppData\Local\Temp\is-GFDF3.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • \Users\Admin\AppData\Local\Temp\is-GFDF3.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-GFDF3.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1676-81-0x0000000003600000-0x00000000045E9000-memory.dmp

    Filesize

    15.9MB

  • memory/1676-70-0x0000000003600000-0x00000000045E9000-memory.dmp

    Filesize

    15.9MB

  • memory/1756-77-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1756-73-0x0000000000400000-0x00000000013E9000-memory.dmp

    Filesize

    15.9MB

  • memory/1756-71-0x0000000000400000-0x00000000013E9000-memory.dmp

    Filesize

    15.9MB

  • memory/1756-82-0x0000000000400000-0x00000000013E9000-memory.dmp

    Filesize

    15.9MB

  • memory/1756-72-0x0000000000400000-0x00000000013E9000-memory.dmp

    Filesize

    15.9MB

  • memory/1756-85-0x0000000000400000-0x00000000013E9000-memory.dmp

    Filesize

    15.9MB

  • memory/1948-69-0x0000000000400000-0x0000000000440000-memory.dmp

    Filesize

    256KB

  • memory/1948-54-0x00000000764D1000-0x00000000764D3000-memory.dmp

    Filesize

    8KB

  • memory/1948-86-0x0000000000400000-0x0000000000440000-memory.dmp

    Filesize

    256KB

  • memory/1948-55-0x0000000000400000-0x0000000000440000-memory.dmp

    Filesize

    256KB