Analysis

  • max time kernel
    146s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-11-2022 16:34

General

  • Target

    fb751126907e0ce12495aefbf185e32cbf7be79c0fab3d2853745229e22e89b1.exe

  • Size

    4.3MB

  • MD5

    4c163fb792d79938c5cc74cfd61b6f6d

  • SHA1

    704f5baa51b56af1f0a2da4900998390d92f5252

  • SHA256

    fb751126907e0ce12495aefbf185e32cbf7be79c0fab3d2853745229e22e89b1

  • SHA512

    414ba7033d8ff12ba7500c5e1e7250bfaadf9f2d3b7b661670ba355b559b1139a274e5125e0b0db1764dc6a3148b507e8a1a4d0f0d9695eb42db9064de5b8e41

  • SSDEEP

    49152:wCOqIz5U23CZ+6rmxup4jdGKvghxfki1nPXGIjQwZ8hpTQdPb:D25U946RKc9P2iQwZspsdP

Malware Config

Signatures

  • Registers COM server for autorun 1 TTPs 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Installs/modifies Browser Helper Object 2 TTPs 8 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in Program Files directory 8 IoCs
  • Modifies Internet Explorer settings 1 TTPs 8 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fb751126907e0ce12495aefbf185e32cbf7be79c0fab3d2853745229e22e89b1.exe
    "C:\Users\Admin\AppData\Local\Temp\fb751126907e0ce12495aefbf185e32cbf7be79c0fab3d2853745229e22e89b1.exe"
    1⤵
    • Loads dropped DLL
    • Installs/modifies Browser Helper Object
    • Drops file in Program Files directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4140
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe /s "C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.x64.dll"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2200
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.x64.dll"
        3⤵
        • Registers COM server for autorun
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:4780

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Browser Extensions

1
T1176

Defense Evasion

Modify Registry

3
T1112

Discovery

Query Registry

1
T1012

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.dat
    Filesize

    4KB

    MD5

    3fed97b38ef995b4029b17443338240f

    SHA1

    4720cfc43d40d22ccb8646a8be0eec936afed553

    SHA256

    94f48feff87cbd6004199aed27120dff716c80175d8ac64dcc9c8dee8e19522b

    SHA512

    036aab6afb4848263cc3b3a123758502962ec69a8cd7c53e2c66d84a652cca35116bd6de76e9a727bea727239ecfa2644182f4e2be3bd71e482154ba739cd92a

  • C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.dll
    Filesize

    738KB

    MD5

    49961c7c9a7aef57f49adf50d1c810f6

    SHA1

    fc2078aeff5d5abee27c9e8a500cb2d6ae755b05

    SHA256

    c80abdc502d18db54137edc2680a498402c765999814b7fe1b2a7b69a64ce846

    SHA512

    8ad2c3dbd3b4390e4c49561f25ff2acdd4ab4468074e213f3efc81a598f71620e8f21fc87114623a6c0509997e47e1c4f5ffe703c7421ae313f7ba536df2772f

  • C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.tlb
    Filesize

    3KB

    MD5

    e3ab22d8beac0180520ab5289a64419b

    SHA1

    1456ba2c78b293e5a80185fefdf05f5dbe424937

    SHA256

    0d3342857b67678dd76e6a24e137f0d75ba399bb48bf5095d7e4f7dfa0bbe416

    SHA512

    c04163026ffa1c6fab34b4fdbf23702148c7c2a31dd356d26f9541027db078b6433aff3a5f749a209a3acbcf3a853a9b5f77984540e21be1f823ce92bcbfc4bf

  • C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.x64.dll
    Filesize

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.x64.dll
    Filesize

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • C:\Program Files (x86)\GoSave\WkM5QLVMrgP6Hf.x64.dll
    Filesize

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • memory/2200-138-0x0000000000000000-mapping.dmp
  • memory/4140-132-0x0000000002E90000-0x0000000002F59000-memory.dmp
    Filesize

    804KB

  • memory/4780-141-0x0000000000000000-mapping.dmp