Analysis

  • max time kernel
    90s
  • max time network
    127s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240611-en
  • resource tags

    arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29-06-2024 07:25

General

  • Target

    c929a54f69431941c73e7950a8d0d629ad30599552f5710bad43a2e122069f53.exe

  • Size

    2.2MB

  • MD5

    3f4a06a294d8669d1db2e933f6b8520d

  • SHA1

    3b00de652026162cfbb464b0e9b1f5f176ec48a8

  • SHA256

    c929a54f69431941c73e7950a8d0d629ad30599552f5710bad43a2e122069f53

  • SHA512

    a37b58f8bee55593bf35505c61353e2c5d4d41cdc79fad7e17cc91f0631543ef62ffe4df24ce1d641b996966cb298fd381906b7cf13032b356d792d2853c8ddf

  • SSDEEP

    49152:qpjNvr9ySAOmw4JHHO+SASagXkJr4MDkUwm:qpjNp7p4JHH8n5A

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

  • Detect Vidar Stealer 8 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
  • 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c929a54f69431941c73e7950a8d0d629ad30599552f5710bad43a2e122069f53.exe
    "C:\Users\Admin\AppData\Local\Temp\c929a54f69431941c73e7950a8d0d629ad30599552f5710bad43a2e122069f53.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2888
    • C:\Users\Admin\AppData\Local\Temp\kat6283.tmp
      C:\Users\Admin\AppData\Local\Temp\kat6283.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:980

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat6283.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/980-8-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/980-9-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/980-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/980-24-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/980-25-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/980-27-0x000000002F6A0000-0x000000002F8FF000-memory.dmp

    Filesize

    2.4MB

  • memory/980-35-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/980-36-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/2888-0-0x0000000000850000-0x0000000000851000-memory.dmp

    Filesize

    4KB

  • memory/2888-2-0x0000000004060000-0x0000000004170000-memory.dmp

    Filesize

    1.1MB

  • memory/2888-10-0x0000000000400000-0x0000000000635000-memory.dmp

    Filesize

    2.2MB