Analysis

  • max time kernel
    61s
  • max time network
    69s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    25-03-2023 22:52

General

  • Target

    file.exe

  • Size

    1.9MB

  • MD5

    c20a33a7e854f6b23f142a499e3e66b8

  • SHA1

    0931830e1349eaec216ac5aaa5b0220aa4f0d33c

  • SHA256

    77a0d2ab6f210a06ced28c1202888ff6950ba6cd2d323008a18661493f18e870

  • SHA512

    7fcfd48d455aa297a6050446b1e0385979bc63d899fd4595d873f9a5d5820b4678c6d8e25fa98c679302b3df495303419860b7e2875bbbde1b123e2c03a5a4ca

  • SSDEEP

    49152:EGlJfs3s+ly+RX9CNjzWyAR2g1/bHKLy5QSKkrfL5dlLYp:5Ws+ly+RXiXWyhV25NrNPYp

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.

  • 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 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 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:1356
    • C:\Users\Admin\AppData\Local\Temp\is-CVBUH.tmp\is-4DK4P.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-CVBUH.tmp\is-4DK4P.tmp" /SL4 $7012A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1745646 52736
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1468
      • C:\Program Files (x86)\FJEsoftFR\FRec325\FRec325.exe
        "C:\Program Files (x86)\FJEsoftFR\FRec325\FRec325.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1744
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eM04u3VaI.exe
          4⤵
          • Executes dropped EXE
          PID:1844
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "FRec325.exe" /f & erase "C:\Program Files (x86)\FJEsoftFR\FRec325\FRec325.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1928
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "FRec325.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1684

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\FJEsoftFR\FRec325\FRec325.exe
    Filesize

    2.1MB

    MD5

    739a9a8eb28ac336548cbaf95f7bf702

    SHA1

    d59ee8a775a351382498281afb92b1391cdd42d5

    SHA256

    7423c807ef3b8ea991ee1d4b58837293e70b342d23f857c881063555ab6bbb7a

    SHA512

    b4dc5b816fc2edbd9873875981a111ceb48dea982240cd22ab368bc2da0f01cf771a015b85045a36aafb755b8d1062ecba8235f43e6323f33e08979285628fd2

  • C:\Program Files (x86)\FJEsoftFR\FRec325\FRec325.exe
    Filesize

    2.1MB

    MD5

    739a9a8eb28ac336548cbaf95f7bf702

    SHA1

    d59ee8a775a351382498281afb92b1391cdd42d5

    SHA256

    7423c807ef3b8ea991ee1d4b58837293e70b342d23f857c881063555ab6bbb7a

    SHA512

    b4dc5b816fc2edbd9873875981a111ceb48dea982240cd22ab368bc2da0f01cf771a015b85045a36aafb755b8d1062ecba8235f43e6323f33e08979285628fd2

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

    1B

    MD5

    cfcd208495d565ef66e7dff9f98764da

    SHA1

    b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

    SHA256

    5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

    SHA512

    31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

  • C:\Users\Admin\AppData\Local\Temp\is-CVBUH.tmp\is-4DK4P.tmp
    Filesize

    659KB

    MD5

    63bdf487b26c0886dbced14bab4d4257

    SHA1

    e3621d870aa54d552861f1c71dea1fb36d71def6

    SHA256

    ca5e816fa95cbcd2a880f2c319d3ddf09686e96ee633af63a396969e5e62335a

    SHA512

    b433e540c9da175efdd09d44be39c563176046d89aa03edcc43e3582aa1f180e40e283503d152a46e07d4e77f8fa18b76118e425961b507ad5ca3864c39a7c40

  • C:\Users\Admin\AppData\Local\Temp\is-CVBUH.tmp\is-4DK4P.tmp
    Filesize

    659KB

    MD5

    63bdf487b26c0886dbced14bab4d4257

    SHA1

    e3621d870aa54d552861f1c71dea1fb36d71def6

    SHA256

    ca5e816fa95cbcd2a880f2c319d3ddf09686e96ee633af63a396969e5e62335a

    SHA512

    b433e540c9da175efdd09d44be39c563176046d89aa03edcc43e3582aa1f180e40e283503d152a46e07d4e77f8fa18b76118e425961b507ad5ca3864c39a7c40

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eM04u3VaI.exe
    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\FJEsoftFR\FRec325\FRec325.exe
    Filesize

    2.1MB

    MD5

    739a9a8eb28ac336548cbaf95f7bf702

    SHA1

    d59ee8a775a351382498281afb92b1391cdd42d5

    SHA256

    7423c807ef3b8ea991ee1d4b58837293e70b342d23f857c881063555ab6bbb7a

    SHA512

    b4dc5b816fc2edbd9873875981a111ceb48dea982240cd22ab368bc2da0f01cf771a015b85045a36aafb755b8d1062ecba8235f43e6323f33e08979285628fd2

  • \Users\Admin\AppData\Local\Temp\is-CVBUH.tmp\is-4DK4P.tmp
    Filesize

    659KB

    MD5

    63bdf487b26c0886dbced14bab4d4257

    SHA1

    e3621d870aa54d552861f1c71dea1fb36d71def6

    SHA256

    ca5e816fa95cbcd2a880f2c319d3ddf09686e96ee633af63a396969e5e62335a

    SHA512

    b433e540c9da175efdd09d44be39c563176046d89aa03edcc43e3582aa1f180e40e283503d152a46e07d4e77f8fa18b76118e425961b507ad5ca3864c39a7c40

  • \Users\Admin\AppData\Local\Temp\is-NB4P5.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • \Users\Admin\AppData\Local\Temp\is-NB4P5.tmp\_isetup\_shfoldr.dll
    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-NB4P5.tmp\_isetup\_shfoldr.dll
    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eM04u3VaI.exe
    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1356-99-0x0000000000400000-0x0000000000413000-memory.dmp
    Filesize

    76KB

  • memory/1356-54-0x0000000000400000-0x0000000000413000-memory.dmp
    Filesize

    76KB

  • memory/1356-135-0x0000000000400000-0x0000000000413000-memory.dmp
    Filesize

    76KB

  • memory/1468-91-0x0000000003980000-0x00000000049A5000-memory.dmp
    Filesize

    16.1MB

  • memory/1468-90-0x0000000000250000-0x0000000000251000-memory.dmp
    Filesize

    4KB

  • memory/1468-100-0x0000000000400000-0x00000000004B4000-memory.dmp
    Filesize

    720KB

  • memory/1468-134-0x0000000000400000-0x00000000004B4000-memory.dmp
    Filesize

    720KB

  • memory/1468-108-0x0000000003980000-0x00000000049A5000-memory.dmp
    Filesize

    16.1MB

  • memory/1744-93-0x0000000000400000-0x0000000001425000-memory.dmp
    Filesize

    16.1MB

  • memory/1744-114-0x0000000000400000-0x0000000001425000-memory.dmp
    Filesize

    16.1MB

  • memory/1744-110-0x0000000000400000-0x0000000001425000-memory.dmp
    Filesize

    16.1MB

  • memory/1744-133-0x0000000000400000-0x0000000001425000-memory.dmp
    Filesize

    16.1MB

  • memory/1744-105-0x0000000010000000-0x000000001001B000-memory.dmp
    Filesize

    108KB

  • memory/1744-101-0x0000000000400000-0x0000000001425000-memory.dmp
    Filesize

    16.1MB

  • memory/1744-92-0x0000000000400000-0x0000000001425000-memory.dmp
    Filesize

    16.1MB