arkei | cb8f3744db75d13ec86fc9ef5b8e0f680a29fd2368f1d991cc0865aa6c7cc89e

General

Target
ff83b1518022f4538654e5ed80c8f5ad.exe
Size 263KB
Sample220120-yn9jasbdcq
SHA256 cb8f3744db75d13ec86fc9ef5b8e0f680a29fd2368f1d991cc0865aa6c7cc89e
MD5 ff83b1518022f4538654e5ed80c8f5ad
SHA1 88524949dfcc8130d14d4c607ec716d032f1aa15
SHA512 d828101e5ec637d418b0752b7fccc7f94fc5fb870e6debd73970a411ad8cde66e2326b03b4896789761f07b0daba34a93762a6cac17ddd0eee7751f899c83cb5
MD5 SHA1 SHA512

Score

10^/10

arkei default discovery spyware stealer

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

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/1876-56-0x00000000003A0000-0x00000000003BC000-memory.dmp	family_arkei
behavioral1/memory/1876-57-0x0000000000400000-0x0000000000449000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1368	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1876	ff83b1518022f4538654e5ed80c8f5ad.exe
1876	ff83b1518022f4538654e5ed80c8f5ad.exe
1876	ff83b1518022f4538654e5ed80c8f5ad.exe
1876	ff83b1518022f4538654e5ed80c8f5ad.exe
1876	ff83b1518022f4538654e5ed80c8f5ad.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ff83b1518022f4538654e5ed80c8f5ad.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ff83b1518022f4538654e5ed80c8f5ad.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1124	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 1368	1876	ff83b1518022f4538654e5ed80c8f5ad.exe	29
PID 1876 wrote to memory of 1368	1876	ff83b1518022f4538654e5ed80c8f5ad.exe	29
PID 1876 wrote to memory of 1368	1876	ff83b1518022f4538654e5ed80c8f5ad.exe	29
PID 1876 wrote to memory of 1368	1876	ff83b1518022f4538654e5ed80c8f5ad.exe	29
PID 1368 wrote to memory of 1124	1368	cmd.exe	31
PID 1368 wrote to memory of 1124	1368	cmd.exe	31
PID 1368 wrote to memory of 1124	1368	cmd.exe	31
PID 1368 wrote to memory of 1124	1368	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\ff83b1518022f4538654e5ed80c8f5ad.exe
"C:\Users\Admin\AppData\Local\Temp\ff83b1518022f4538654e5ed80c8f5ad.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\ff83b1518022f4538654e5ed80c8f5ad.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1368
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1124

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

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Downloads

memory/1876-55-0x0000000000020000-0x0000000000031000-memory.dmp

Download

memory/1876-56-0x00000000003A0000-0x00000000003BC000-memory.dmp

Download

memory/1876-57-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/1876-58-0x00000000760F1000-0x00000000760F3000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads