Analysis

  • max time kernel
    41s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 17:15

General

  • Target

    4f14190dd45d95156362829c7f8adc3de715ed29befff14834fda7cb2dccccd2.exe

  • Size

    3.6MB

  • MD5

    e4bff2be82b2692de3104665543fd92a

  • SHA1

    34f3b75957b9e94aa66ff213fe6271d274fdc73a

  • SHA256

    4f14190dd45d95156362829c7f8adc3de715ed29befff14834fda7cb2dccccd2

  • SHA512

    78e1038e7b23ae5b4d1958ab7fb96d0c37e10ac0f38755372df89d60f24649f1f8b64ae44f21fe80db0cc7ad753b204ab0213ab69749d735e695002bcfa9167e

  • SSDEEP

    49152:GZnE7OROC/lQNdt8mDISXMW6GTBO6kyqzUh8xlFZqa:GZnEpC/lvmDISj6yONwhWFk

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 9 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\4f14190dd45d95156362829c7f8adc3de715ed29befff14834fda7cb2dccccd2.exe
    "C:\Users\Admin\AppData\Local\Temp\4f14190dd45d95156362829c7f8adc3de715ed29befff14834fda7cb2dccccd2.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:1220
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe /s "C:\Program Files (x86)\cosstminn\p8USGr2u3H4xoS.x64.dll"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1044
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Program Files (x86)\cosstminn\p8USGr2u3H4xoS.x64.dll"
        3⤵
        • Registers COM server for autorun
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:368

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\cosstminn\p8USGr2u3H4xoS.dat

    Filesize

    3KB

    MD5

    f437d4474d0658e778ad916c68d09d7a

    SHA1

    1e915cc1569a5a55690e541cdf2545965c2fd184

    SHA256

    8aa1cf88095e0804031121fb46be505922b70c76dca404ba8b6ee636a111b2fc

    SHA512

    5c37c92be0c4732cc4ac4ca28edcff436b91109dd5d12b86fb2455ac4448999d1e65783693136ee67f5e8fc62b6e561de0d2179316ce346a38e238b061df74ac

  • C:\Program Files (x86)\cosstminn\p8USGr2u3H4xoS.tlb

    Filesize

    3KB

    MD5

    74dcfbb4c0210a05872897b72dad6ccc

    SHA1

    ae4fe72c69877b895e4fd9e27dcdb57edaf08e5b

    SHA256

    fd828f1d5979ed1997727e6709529f2455e308ff5d771ecf8f362dc311c116a6

    SHA512

    8aff1886b7a1e20bb1b4aedf9ce380c607f9e34d7cb155890b0de4f45a2fdd3a7d4c66bc43341521100ca675b64e966e90cf0a4220ec813681172baf0b2e96dc

  • C:\Program Files (x86)\cosstminn\p8USGr2u3H4xoS.x64.dll

    Filesize

    703KB

    MD5

    02dc4deb3ed0a4ed4ab84f5ec9fd303b

    SHA1

    1376b56ac30294ddff639dbf3b832d534f3c3fb9

    SHA256

    8498051cb730a3be5d7dc8eabd939f2f7223464145061bc15afc7d3cee88c421

    SHA512

    1bea8bbe0ce9cc0f652437c7ebb2b1c6d2741db6976a6b3228cc5358a5985f47228e1b475d7ed4bf66a0834c09916517c3e813a6b9ebebedf608a8666493a1b7

  • \Program Files (x86)\cosstminn\p8USGr2u3H4xoS.dll

    Filesize

    626KB

    MD5

    40bb0aaab84ce029293396ecf927c32d

    SHA1

    52f60ebe0af63494869e9b9e8ced6409cd9461fb

    SHA256

    b268dd30a47ce2568d761b67fb522d9c0f5638dc0f0b2bc229bb589b49745d78

    SHA512

    8f9d3f7c3e0ceac22096e125bbf31c4e7206b804cb9482ae7eebfca63dcbc09bb8e64341820a501c3d03e15b2658b29706c3e222a2d68312a8f7023ca14dd706

  • \Program Files (x86)\cosstminn\p8USGr2u3H4xoS.x64.dll

    Filesize

    703KB

    MD5

    02dc4deb3ed0a4ed4ab84f5ec9fd303b

    SHA1

    1376b56ac30294ddff639dbf3b832d534f3c3fb9

    SHA256

    8498051cb730a3be5d7dc8eabd939f2f7223464145061bc15afc7d3cee88c421

    SHA512

    1bea8bbe0ce9cc0f652437c7ebb2b1c6d2741db6976a6b3228cc5358a5985f47228e1b475d7ed4bf66a0834c09916517c3e813a6b9ebebedf608a8666493a1b7

  • \Program Files (x86)\cosstminn\p8USGr2u3H4xoS.x64.dll

    Filesize

    703KB

    MD5

    02dc4deb3ed0a4ed4ab84f5ec9fd303b

    SHA1

    1376b56ac30294ddff639dbf3b832d534f3c3fb9

    SHA256

    8498051cb730a3be5d7dc8eabd939f2f7223464145061bc15afc7d3cee88c421

    SHA512

    1bea8bbe0ce9cc0f652437c7ebb2b1c6d2741db6976a6b3228cc5358a5985f47228e1b475d7ed4bf66a0834c09916517c3e813a6b9ebebedf608a8666493a1b7

  • memory/368-65-0x0000000000000000-mapping.dmp

  • memory/368-66-0x000007FEFBE61000-0x000007FEFBE63000-memory.dmp

    Filesize

    8KB

  • memory/1044-61-0x0000000000000000-mapping.dmp

  • memory/1220-54-0x00000000765B1000-0x00000000765B3000-memory.dmp

    Filesize

    8KB

  • memory/1220-55-0x0000000002730000-0x00000000027D4000-memory.dmp

    Filesize

    656KB