Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    23-05-2024 01:32

General

  • Target

    5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe

  • Size

    2.1MB

  • MD5

    e944a0bbd2b4eacf1c70e969db2f600a

  • SHA1

    1e3cc585110b19c62bda4dc3f76dc1ffa14f3775

  • SHA256

    5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd

  • SHA512

    fa0488fc8bdfc2cf22eca3170b1806c2caba933e396647a2ffc4728d14a620d3851393f4f0b5157daa5f9de864dda06192f75d952d0b8d41af04b299f7da7cca

  • SSDEEP

    49152:N6uDuaS9refuYJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9DYtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

  • Detect Vidar Stealer 10 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 4 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 4 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 9 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 4 IoCs
  • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 9 IoCs
  • Detects executables containing potential Windows Defender anti-emulation checks 9 IoCs
  • 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\5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe
    "C:\Users\Admin\AppData\Local\Temp\5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1792
    • C:\Users\Admin\AppData\Local\Temp\kat195A.tmp
      C:\Users\Admin\AppData\Local\Temp\kat195A.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:2392

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cab1E5C.tmp
    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\Local\Temp\Tar1E8D.tmp
    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • \Users\Admin\AppData\Local\Temp\kat195A.tmp
    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1792-21-0x0000000000400000-0x000000000061C000-memory.dmp
    Filesize

    2.1MB

  • memory/1792-4-0x0000000003370000-0x00000000034B9000-memory.dmp
    Filesize

    1.3MB

  • memory/1792-0-0x0000000000220000-0x0000000000221000-memory.dmp
    Filesize

    4KB

  • memory/2392-22-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-18-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-15-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-13-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-9-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-11-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-23-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-17-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-162-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-181-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-201-0x0000000020590000-0x00000000207EF000-memory.dmp
    Filesize

    2.4MB

  • memory/2392-212-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2392-231-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB