arkei | b7ea59bbce56cc2444eecac884b650a6038902ab692b2855a69e34b4e90b26db

General

Target
3ef4c9330ec5b21b133827c27a45c007.exe
Size 342KB
Sample211129-x14m5scfcj
SHA256 b7ea59bbce56cc2444eecac884b650a6038902ab692b2855a69e34b4e90b26db
MD5 3ef4c9330ec5b21b133827c27a45c007
SHA1 9625c581a1982cafd46b8138b15ee4358912af36
SHA512 0ea000ec45cd8cfab492fb5a6d095dfc9d4506870665a9c7716da6ab1b482f5da7eaa3679e8718409484235cd2d64badc5e0e54d4bcfcf96ba415f26ae22722f
MD5 SHA1 SHA512

Score

10^/10

arkei default discovery spyware stealer suricata

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://file-file-host4.com/tratata.php

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei
suricata: ET MALWARE Win32/Vidar Variant Stealer CnC Exfil
suricata: ET MALWARE Win32/Vidar Variant Stealer CnC Exfil
suricata

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/2616-116-0x00000000001C0000-0x00000000001E1000-memory.dmp	family_arkei
behavioral2/memory/2616-117-0x0000000000400000-0x0000000003231000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
2616	3ef4c9330ec5b21b133827c27a45c007.exe
2616	3ef4c9330ec5b21b133827c27a45c007.exe
2616	3ef4c9330ec5b21b133827c27a45c007.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	3ef4c9330ec5b21b133827c27a45c007.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	3ef4c9330ec5b21b133827c27a45c007.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3996	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 648	2616	3ef4c9330ec5b21b133827c27a45c007.exe	69
PID 2616 wrote to memory of 648	2616	3ef4c9330ec5b21b133827c27a45c007.exe	69
PID 2616 wrote to memory of 648	2616	3ef4c9330ec5b21b133827c27a45c007.exe	69
PID 648 wrote to memory of 3996	648	cmd.exe	71
PID 648 wrote to memory of 3996	648	cmd.exe	71
PID 648 wrote to memory of 3996	648	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\3ef4c9330ec5b21b133827c27a45c007.exe
"C:\Users\Admin\AppData\Local\Temp\3ef4c9330ec5b21b133827c27a45c007.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3ef4c9330ec5b21b133827c27a45c007.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:648
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:3996

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2616-116-0x00000000001C0000-0x00000000001E1000-memory.dmp

Download

memory/2616-117-0x0000000000400000-0x0000000003231000-memory.dmp