arkei | a60606835cb44b0dcc0eb70166643ec8751f379fbc4d18e0dbfdc1c54f258fa2

General

Target
5e6486d0bb8a6336c72997d383d91ac1.exe
Size 263KB
Sample211002-cf5pgsdch8
SHA256 a60606835cb44b0dcc0eb70166643ec8751f379fbc4d18e0dbfdc1c54f258fa2
MD5 5e6486d0bb8a6336c72997d383d91ac1
SHA1 ab0f65e55faf88d22c8ee3df1c9411578ee34c70
SHA512 10283b353b71bcf7ce0f6fb439ae43c7d24759aa970d1a70e2339cc64fb13de2481151f003689bfa319c732e82700bfa78dc5c6a686ec3ef488327c9b2accc6d
MD5 SHA1 SHA512

Score

10^/10

arkei discovery spyware stealer

Malware Config

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/1532-54-0x0000000000020000-0x0000000000039000-memory.dmp	family_arkei
behavioral1/memory/1532-55-0x0000000000400000-0x0000000000871000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
740	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1532	5e6486d0bb8a6336c72997d383d91ac1.exe
1532	5e6486d0bb8a6336c72997d383d91ac1.exe
1532	5e6486d0bb8a6336c72997d383d91ac1.exe
1532	5e6486d0bb8a6336c72997d383d91ac1.exe
1532	5e6486d0bb8a6336c72997d383d91ac1.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	5e6486d0bb8a6336c72997d383d91ac1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	5e6486d0bb8a6336c72997d383d91ac1.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1460	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1532 wrote to memory of 740	1532	5e6486d0bb8a6336c72997d383d91ac1.exe	29
PID 1532 wrote to memory of 740	1532	5e6486d0bb8a6336c72997d383d91ac1.exe	29
PID 1532 wrote to memory of 740	1532	5e6486d0bb8a6336c72997d383d91ac1.exe	29
PID 1532 wrote to memory of 740	1532	5e6486d0bb8a6336c72997d383d91ac1.exe	29
PID 740 wrote to memory of 1460	740	cmd.exe	31
PID 740 wrote to memory of 1460	740	cmd.exe	31
PID 740 wrote to memory of 1460	740	cmd.exe	31
PID 740 wrote to memory of 1460	740	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\5e6486d0bb8a6336c72997d383d91ac1.exe
"C:\Users\Admin\AppData\Local\Temp\5e6486d0bb8a6336c72997d383d91ac1.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1532
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\5e6486d0bb8a6336c72997d383d91ac1.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:740
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1460

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/1532-53-0x00000000751D1000-0x00000000751D3000-memory.dmp

Download

memory/1532-54-0x0000000000020000-0x0000000000039000-memory.dmp

Download

memory/1532-55-0x0000000000400000-0x0000000000871000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads