Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    07-06-2024 01:39

General

  • Target

    cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe

  • Size

    2.4MB

  • MD5

    fa3b69af927ad405668e5b2d569d7e66

  • SHA1

    9a9a881571dc2e8fcb0e20608e5c92d209d02ce2

  • SHA256

    cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8

  • SHA512

    9d56aa149dd437d2dff73272f7d0f32ef2cf877723774e551d38f24abea0fabf5ba41d0d009928fc49102928a0694e9bab4ef2240d71311ffc87f9bb2248ffe7

  • SSDEEP

    49152:wQc81KnB/a/hNT/dRYa8aesY3Ot4N7G/:wDta/hNT/dRn0etD/

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

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 15 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe
    "C:\Users\Admin\AppData\Local\Temp\cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Users\Admin\AppData\Local\Temp\kat2452.tmp
      C:\Users\Admin\AppData\Local\Temp\kat2452.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:2920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

    Filesize

    342B

    MD5

    66dc1aaeb02615f052726aa5a854702f

    SHA1

    f7c56aa4a3d6b678e33712fd6e27aabd349fa593

    SHA256

    f2f45c30524491a5530f5d7610face66efd6ca1682d83c19f7bfdf0e36e31af0

    SHA512

    4004f71d3688c438cf8b902f137d747b925bdbaf5e0d72189ee44df9bfb4b82255b84e6c20d28a13d524890fd260029246e08fa42623c65b5ca9f726164fb145

  • C:\Users\Admin\AppData\Local\Temp\Tar2978.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • \Users\Admin\AppData\Local\Temp\kat2452.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1740-0-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/1740-1-0x0000000002390000-0x00000000024DC000-memory.dmp

    Filesize

    1.3MB

  • memory/1740-21-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/2920-15-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-19-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-18-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-23-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-13-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-24-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-11-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-172-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-193-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-215-0x000000001DFC0000-0x000000001E21F000-memory.dmp

    Filesize

    2.4MB

  • memory/2920-230-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2920-251-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB