Analysis

  • max time kernel
    229s
  • max time network
    337s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    24-11-2022 19:00

General

  • Target

    cf0fbf5f74920e0673ac598bd49f459ea7a446db303efd07e37138e1cc7d2f42.exe

  • Size

    4.2MB

  • MD5

    d5174a0c2744a1d0a2eeb87c38f3185f

  • SHA1

    1eece94c6ad187f155011fc02a54791d8fdcda45

  • SHA256

    cf0fbf5f74920e0673ac598bd49f459ea7a446db303efd07e37138e1cc7d2f42

  • SHA512

    92e85bfd837ab1625457982ddc7da908823de961edc36edbd5211f0e095832e4e29fc28146803ef886addc86c7c6261ebc8ae929a2478432148ed424260aa1c3

  • SSDEEP

    49152:r+RmAZoUroKRXjQ5QA0w3eLnfwZU5BcumIuXPYefftBC+uwzw/PMtn8NE3I9Hek4:rkm0NRoZe0NlBC+uXPMtEE3Ihz

Malware Config

Signatures

  • Registers COM server for autorun 1 TTPs 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

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

  • Drops Chrome extension 3 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 8 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Modifies Internet Explorer settings 1 TTPs 8 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cf0fbf5f74920e0673ac598bd49f459ea7a446db303efd07e37138e1cc7d2f42.exe
    "C:\Users\Admin\AppData\Local\Temp\cf0fbf5f74920e0673ac598bd49f459ea7a446db303efd07e37138e1cc7d2f42.exe"
    1⤵
    • Loads dropped DLL
    • Drops Chrome extension
    • Installs/modifies Browser Helper Object
    • Drops file in System32 directory
    • 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:664
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe /s "C:\Program Files (x86)\GoSave\6rBbK8l0zKdQHX.x64.dll"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:864
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Program Files (x86)\GoSave\6rBbK8l0zKdQHX.x64.dll"
        3⤵
        • Registers COM server for autorun
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:452

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

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\GoSave\6rBbK8l0zKdQHX.dat
    Filesize

    4KB

    MD5

    7562016c392e63b24cecea200f08212b

    SHA1

    6b0e020093f793b1771708f6a8b57d3bf438afbd

    SHA256

    7c8e12a5408c5b64cac0a67d72c633c345c924e4fc487a53dbb74939be6039d2

    SHA512

    ef6e01dac4b475519ffe2fd1592e9bb96e6f79ec8265ad0dce1d7d16432de538bd5dde80e62bc2f6285585b1cfbaca57f0ad7c26ba7fdd2af34d828621e3608f

  • C:\Program Files (x86)\GoSave\6rBbK8l0zKdQHX.tlb
    Filesize

    3KB

    MD5

    6bdd6ba23e0c129c5b4fa1a141aa21f6

    SHA1

    beef025f5611f84ce53f24e58435f070f92c064f

    SHA256

    14f706e58b4e332e1bc9b6fc6c650097db6e0ea91ac7ad0064aba01832ddd990

    SHA512

    828d9f58efd731252209ea1ed7d092c9e88190b81272fa704c8cb963f5f9d91172610b90e0bce763c0f5207b10d67d0fc4eb31294fd89dde2a260a19d324bc1b

  • C:\Program Files (x86)\GoSave\6rBbK8l0zKdQHX.x64.dll
    Filesize

    882KB

    MD5

    0827270a2d7dca4230839de0511d4280

    SHA1

    264ce2775315b06a37cd51d7152df58e29a11b60

    SHA256

    6863740f9ed110fbf10ef18b8732ada23f4db42e998214ed97a09f5fbdd7571b

    SHA512

    d1bf285d6b084920c8d03170cc317939a6a5a3c8b67f71064478fc02feba512a1bffe7f10da424efd6441e61933af777b70c5ace4dce582a0b2bd3a02bdc76c4

  • \Program Files (x86)\GoSave\6rBbK8l0zKdQHX.dll
    Filesize

    750KB

    MD5

    a1e5276fa264891a2394cfb992fef753

    SHA1

    3fc9b45acb1feaf1799f70cf93a965221ffe492e

    SHA256

    7d25cce7e647fbee7c157d7cad8b3a12abb66fa3b992adfede9de78687b69838

    SHA512

    ded2b69d13d0f6dd0b7f1fb0b6e8dd0ff1e6705ef5ecae284421826b630de43f0fc7c7783c3246c9fe31dedf07e35e3051366abcc666dec7ff6fe06416c62fcd

  • \Program Files (x86)\GoSave\6rBbK8l0zKdQHX.x64.dll
    Filesize

    882KB

    MD5

    0827270a2d7dca4230839de0511d4280

    SHA1

    264ce2775315b06a37cd51d7152df58e29a11b60

    SHA256

    6863740f9ed110fbf10ef18b8732ada23f4db42e998214ed97a09f5fbdd7571b

    SHA512

    d1bf285d6b084920c8d03170cc317939a6a5a3c8b67f71064478fc02feba512a1bffe7f10da424efd6441e61933af777b70c5ace4dce582a0b2bd3a02bdc76c4

  • \Program Files (x86)\GoSave\6rBbK8l0zKdQHX.x64.dll
    Filesize

    882KB

    MD5

    0827270a2d7dca4230839de0511d4280

    SHA1

    264ce2775315b06a37cd51d7152df58e29a11b60

    SHA256

    6863740f9ed110fbf10ef18b8732ada23f4db42e998214ed97a09f5fbdd7571b

    SHA512

    d1bf285d6b084920c8d03170cc317939a6a5a3c8b67f71064478fc02feba512a1bffe7f10da424efd6441e61933af777b70c5ace4dce582a0b2bd3a02bdc76c4

  • memory/452-65-0x0000000000000000-mapping.dmp
  • memory/452-66-0x000007FEFC131000-0x000007FEFC133000-memory.dmp
    Filesize

    8KB

  • memory/664-54-0x00000000763D1000-0x00000000763D3000-memory.dmp
    Filesize

    8KB

  • memory/664-55-0x0000000000840000-0x000000000090A000-memory.dmp
    Filesize

    808KB

  • memory/864-61-0x0000000000000000-mapping.dmp