Analysis

  • max time kernel
    24s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    24-11-2022 11:48

General

  • Target

    3a137548dcba570baa2ad022755cd8974c314baa5cb7f78be04be90cad7f4500.exe

  • Size

    4.3MB

  • MD5

    4ed86cca58c61749a88f4110b9e9c1c0

  • SHA1

    8889552b7ee522f37605672ffef3d986d358d5bd

  • SHA256

    3a137548dcba570baa2ad022755cd8974c314baa5cb7f78be04be90cad7f4500

  • SHA512

    380f52784d5af458a38a167bcfc41effc79939f1cc8f932babbdd2f5b310d8c6f2c315950c56c34dc4df84e8cf7fb7baec48fde6d7f01e98d10d03af9bcf15cc

  • SSDEEP

    49152:qiOqoT5U2XC5Oarmxup4sdGKvghxfki1l9buOBqFFB+lyzEJ3j2f:p25UdQaSKchbuOBqF6YiT2

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 6 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\3a137548dcba570baa2ad022755cd8974c314baa5cb7f78be04be90cad7f4500.exe
    "C:\Users\Admin\AppData\Local\Temp\3a137548dcba570baa2ad022755cd8974c314baa5cb7f78be04be90cad7f4500.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:1532
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe /s "C:\Program Files (x86)\GoSave\dcJDbsNBEaxUop.x64.dll"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1384
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Program Files (x86)\GoSave\dcJDbsNBEaxUop.x64.dll"
        3⤵
        • Registers COM server for autorun
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:1036

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\dcJDbsNBEaxUop.dat
    Filesize

    4KB

    MD5

    2d1a2a07b2e6c32e9d7d1e080fc5ba42

    SHA1

    e206be6be55ba3a17f615c4cee1e3de8c586c007

    SHA256

    de78ac09f6d1aa9c156e3b43ea2053985260eefa4512ac566b7cb563fe80dc68

    SHA512

    cbd6a967f537bf44725da971a261ec84654327170fc834d9a820a8ed824cd6c6e171f0f7cc66fe2778801edaea9a749484b6bcdd361fed771e7232fb18ac60a6

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

    3KB

    MD5

    e3ab22d8beac0180520ab5289a64419b

    SHA1

    1456ba2c78b293e5a80185fefdf05f5dbe424937

    SHA256

    0d3342857b67678dd76e6a24e137f0d75ba399bb48bf5095d7e4f7dfa0bbe416

    SHA512

    c04163026ffa1c6fab34b4fdbf23702148c7c2a31dd356d26f9541027db078b6433aff3a5f749a209a3acbcf3a853a9b5f77984540e21be1f823ce92bcbfc4bf

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

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • \Program Files (x86)\GoSave\dcJDbsNBEaxUop.dll
    Filesize

    738KB

    MD5

    49961c7c9a7aef57f49adf50d1c810f6

    SHA1

    fc2078aeff5d5abee27c9e8a500cb2d6ae755b05

    SHA256

    c80abdc502d18db54137edc2680a498402c765999814b7fe1b2a7b69a64ce846

    SHA512

    8ad2c3dbd3b4390e4c49561f25ff2acdd4ab4468074e213f3efc81a598f71620e8f21fc87114623a6c0509997e47e1c4f5ffe703c7421ae313f7ba536df2772f

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

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

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

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • memory/1036-65-0x0000000000000000-mapping.dmp
  • memory/1036-66-0x000007FEFB941000-0x000007FEFB943000-memory.dmp
    Filesize

    8KB

  • memory/1384-61-0x0000000000000000-mapping.dmp
  • memory/1532-54-0x0000000075F81000-0x0000000075F83000-memory.dmp
    Filesize

    8KB

  • memory/1532-55-0x00000000008D0000-0x0000000000999000-memory.dmp
    Filesize

    804KB