Overview

overview

10

Static

static

3e8307ec4f...74.exe

windows7_x64

10

3e8307ec4f...74.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    131s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    22/03/2022, 18:50

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General

  • Target
    3e8307ec4f41763c93622f351eba6774.exe
  • Size 269KB
  • Sample220322-xgyyjsdbbl
  • SHA256 13a68e687d6f5afa19b1cb993f3402f93dfbd3f2d7cc782c1912453ce877d381
  • MD5 SHA1 SHA512
Score
10/10
arkeidefaultdiscoveryspywarestealersuricata

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
  • suricata: ET MALWARE Win32/Arkei Stealer CnC Checkin (GET)

    suricata: ET MALWARE Win32/Arkei Stealer CnC Checkin (GET)

    suricata
  • suricata: ET MALWARE Win32/Arkei Stealer CnC Checkin (POST)

    suricata: ET MALWARE Win32/Arkei Stealer CnC Checkin (POST)

    suricata
  • 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
  • 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 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3e8307ec4f41763c93622f351eba6774.exe
    "C:\Users\Admin\AppData\Local\Temp\3e8307ec4f41763c93622f351eba6774.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1440
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3e8307ec4f41763c93622f351eba6774.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3592
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:3948
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1440 -s 1432
      2⤵
      • Program crash
      PID:1096
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1440 -ip 1440
    1⤵
      PID:4340

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1440-130-0x000000000066D000-0x0000000000680000-memory.dmp
          Download

          memory/1440-131-0x000000000066D000-0x0000000000680000-memory.dmp
          Download

          memory/1440-132-0x00000000005E0000-0x00000000005FF000-memory.dmp
          Download

          memory/1440-133-0x0000000000400000-0x0000000000487000-memory.dmp
          Download