arkei | b3c5e8250ec320fd546df876a5be7ca4e9a70696dc2373ce5ff670def95d5238

General

Target
75a4c25e5af7c58034b2323a11c63ce2.exe
Size 292KB
Sample210927-kf5cqagbbm
SHA256 b3c5e8250ec320fd546df876a5be7ca4e9a70696dc2373ce5ff670def95d5238
MD5 75a4c25e5af7c58034b2323a11c63ce2
SHA1 51bdcfb40c10aebb1374a0a6257d1c63d88a608b
SHA512 5c3d802a28aaacfdea2c21f32bfbb9383f0f3adc09f89616517358e6b3ebfae1d778cc49a1f529133d424cedc1f1eb5f00d6d4e3f9f760ed8d86820ead65c2c5
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 1 IoCs

stealer

resource	yara_rule
behavioral1/memory/1340-55-0x0000000000400000-0x000000000044D000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
568	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1340	75a4c25e5af7c58034b2323a11c63ce2.exe
1340	75a4c25e5af7c58034b2323a11c63ce2.exe
1340	75a4c25e5af7c58034b2323a11c63ce2.exe
1340	75a4c25e5af7c58034b2323a11c63ce2.exe
1340	75a4c25e5af7c58034b2323a11c63ce2.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	75a4c25e5af7c58034b2323a11c63ce2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	75a4c25e5af7c58034b2323a11c63ce2.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1076	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 568	1340	75a4c25e5af7c58034b2323a11c63ce2.exe	29
PID 1340 wrote to memory of 568	1340	75a4c25e5af7c58034b2323a11c63ce2.exe	29
PID 1340 wrote to memory of 568	1340	75a4c25e5af7c58034b2323a11c63ce2.exe	29
PID 1340 wrote to memory of 568	1340	75a4c25e5af7c58034b2323a11c63ce2.exe	29
PID 568 wrote to memory of 1076	568	cmd.exe	31
PID 568 wrote to memory of 1076	568	cmd.exe	31
PID 568 wrote to memory of 1076	568	cmd.exe	31
PID 568 wrote to memory of 1076	568	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\75a4c25e5af7c58034b2323a11c63ce2.exe
"C:\Users\Admin\AppData\Local\Temp\75a4c25e5af7c58034b2323a11c63ce2.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\75a4c25e5af7c58034b2323a11c63ce2.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:568
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1076

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/1340-54-0x0000000000330000-0x000000000035D000-memory.dmp

Download

memory/1340-55-0x0000000000400000-0x000000000044D000-memory.dmp

Download

memory/1340-56-0x0000000075331000-0x0000000075333000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads