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Analysis

  • max time kernel
    121s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    23/05/2024, 23:52

General

  • Target

    61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe

  • Size

    2.1MB

  • MD5

    6e4c4c16eb0a8ace6eff45bbf4af78b0

  • SHA1

    42f77ba20d965dd92b11b6de3daee169145ecfbd

  • SHA256

    61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6

  • SHA512

    db8609ce4490594e576cb1c9991864ab259fa84f1879105bc10048b752605081bb42b4782cd6fcffcfc881ca75915e45e7eaba602cb2591b977f9500fbdffe53

  • SSDEEP

    49152:N6uDuaS9refe4JtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9L4tIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

  • Detect Vidar Stealer 10 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 1 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe
    "C:\Users\Admin\AppData\Local\Temp\61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1780
    • C:\Users\Admin\AppData\Local\Temp\kat1AE0.tmp
      C:\Users\Admin\AppData\Local\Temp\kat1AE0.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1924

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    d2a66216111433a38747d045628fc746

    SHA1

    3d626df8e2810d047963058dda7e1dfe6915a733

    SHA256

    2478d6a39344d94aa603c3c972fc40586e68f007d7bb236454e5d2ec24ddcfe2

    SHA512

    297d72936500d64024769ba834dd0e24d4bb7ed18bb8414509894bcd53707d72d39fb04e27495c21756b1d7f88d8292616ee93b113a1c223ef3dc5ee52d74632

  • C:\Users\Admin\AppData\Local\Temp\Cab1FB3.tmp

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\Local\Temp\Tar1FC5.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • \Users\Admin\AppData\Local\Temp\kat1AE0.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1780-0-0x0000000000320000-0x0000000000321000-memory.dmp

    Filesize

    4KB

  • memory/1780-2-0x0000000003330000-0x0000000003479000-memory.dmp

    Filesize

    1.3MB

  • memory/1780-21-0x0000000000400000-0x000000000061C000-memory.dmp

    Filesize

    2.1MB

  • memory/1924-13-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-17-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-15-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-19-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-9-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-23-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-24-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-11-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-158-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-177-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-198-0x000000001DEC0000-0x000000001E11F000-memory.dmp

    Filesize

    2.4MB

  • memory/1924-208-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/1924-227-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB