Overview

overview

10

Static

static

38c5430a9f...2b.exe

windows7_x64

10

38c5430a9f...2b.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    02/03/2022, 07:38

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General

  • Target
    38c5430a9f33c42cb506c6c91646142b.exe
  • Size 362KB
  • Sample220302-jgeb9adhb7
  • SHA256 80c2b454c1df4f36740d6943f7371acbc7cdfb2f981b25cac2978fc8f0d70379
  • MD5 SHA1 SHA512
Score
10/10
arkeidefaultdiscoveryspywarestealer

Malware Config

Extracted

Family

  • arkei

Botnet

  • Default

C2

  • http://coin-file-file-19.com/tratata.php

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

    stealerarkei
  • Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
    spyware
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 5 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\38c5430a9f33c42cb506c6c91646142b.exe
    "C:\Users\Admin\AppData\Local\Temp\38c5430a9f33c42cb506c6c91646142b.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:2924
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\38c5430a9f33c42cb506c6c91646142b.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2940
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:1708
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2924 -s 1440
      2⤵
      • Drops file in Windows directory
      • Program crash
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4496
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 124 -p 2924 -ip 2924
    1⤵
    • Suspicious use of NtCreateProcessExOtherParentProcess
    • Suspicious use of WriteProcessMemory
    PID:2824

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/2924-130-0x0000000002D08000-0x0000000002D1B000-memory.dmp
        Download

        memory/2924-131-0x0000000002D08000-0x0000000002D1B000-memory.dmp
        Download

        memory/2924-132-0x0000000002C90000-0x0000000002CAF000-memory.dmp
        Download

        memory/2924-133-0x0000000000400000-0x0000000000431000-memory.dmp
        Download