Analysis

  • max time kernel
    134s
  • max time network
    108s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 01:53

General

  • Target

    e4877fdceffd87cec166b266532a431e0d5e7644d950ce9566d2f14bc18be5e2.exe

  • Size

    3.0MB

  • MD5

    097a014e9066d6a4dd30e057e18eb511

  • SHA1

    2baa37cdc9b69e4083fdf468240cbacb1f2851ae

  • SHA256

    e4877fdceffd87cec166b266532a431e0d5e7644d950ce9566d2f14bc18be5e2

  • SHA512

    3409f75f0d073146410ebf31f487626e0c5fc01abb962f56b673256e72981f3e4f5c063e6690feeff1b2937bd14b453c38823242c9dee9e607fe63888d9ad627

  • SSDEEP

    49152:HzcK4Uk57r6mnw8fqFEIawGt2jlobG+FVSA7tffhpZ4F/3:HzvMWmnZSVawGtjHFVS8ffDZ4J

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

  • Detect Vidar Stealer 12 IoCs
  • Detect ZGRat V1 1 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 9 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 9 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 12 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 9 IoCs
  • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 12 IoCs
  • Detects executables containing potential Windows Defender anti-emulation checks 12 IoCs
  • Detects executables packed with unregistered version of .NET Reactor 1 IoCs
  • Downloads MZ/PE file
  • .NET Reactor proctector 1 IoCs

    Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

  • Loads dropped DLL 1 IoCs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e4877fdceffd87cec166b266532a431e0d5e7644d950ce9566d2f14bc18be5e2.exe
    "C:\Users\Admin\AppData\Local\Temp\e4877fdceffd87cec166b266532a431e0d5e7644d950ce9566d2f14bc18be5e2.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1464
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe
      2⤵
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5108
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe" & rd /s /q "C:\ProgramData\GCAKKECAEGDG" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4644
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:3672
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1464 -s 984
      2⤵
      • Program crash
      PID:3360
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1464 -ip 1464
    1⤵
      PID:1600

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Protect544cd51a.dll

      Filesize

      742KB

      MD5

      544cd51a596619b78e9b54b70088307d

      SHA1

      4769ddd2dbc1dc44b758964ed0bd231b85880b65

      SHA256

      dfce2d4d06de6452998b3c5b2dc33eaa6db2bd37810d04e3d02dc931887cfddd

      SHA512

      f56d8b81022bb132d40aa78596da39b5c212d13b84b5c7d2c576bbf403924f1d22e750de3b09d1be30aea359f1b72c5043b19685fc9bf06d8040bfee16b17719

    • memory/1464-21-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-1-0x0000000000B20000-0x0000000000E22000-memory.dmp

      Filesize

      3.0MB

    • memory/1464-23-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-4-0x00000000059F0000-0x0000000005B82000-memory.dmp

      Filesize

      1.6MB

    • memory/1464-28-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-10-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-11-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-12-0x0000000005880000-0x0000000005890000-memory.dmp

      Filesize

      64KB

    • memory/1464-13-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-14-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-15-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-16-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-17-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-0-0x000000007450E000-0x000000007450F000-memory.dmp

      Filesize

      4KB

    • memory/1464-3-0x0000000074500000-0x0000000074CB0000-memory.dmp

      Filesize

      7.7MB

    • memory/1464-2-0x00000000057B0000-0x000000000584C000-memory.dmp

      Filesize

      624KB

    • memory/5108-32-0x000000001B290000-0x000000001B4EF000-memory.dmp

      Filesize

      2.4MB

    • memory/5108-19-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-20-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-29-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-30-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-24-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-47-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-65-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-64-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-48-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-76-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-77-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

    • memory/5108-78-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB