arkei | 111dd17966a5f7058eb1cfc468c1d062602437a69694aa05eff97d121d611408

General

Target

eufive_20210830-223756.exe
Size

264KB
MD5

134fac2ca9c3723cd6107a69f7f06c9e
SHA1

dd81965431606b8e940bb4a5f8f83a9b060d7f10
SHA256

111dd17966a5f7058eb1cfc468c1d062602437a69694aa05eff97d121d611408
SHA512

3d170c5cfaae1ad3f0288afae0a45ce43b852196c74b779618ccaa6dd53009ca3342aa867c6e44164c34b295698b9bf096b640cceeb183e82b1e6cb4f379ada3

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/1060-60-0x0000000000020000-0x0000000000039000-memory.dmp	family_arkei
behavioral1/memory/1060-61-0x0000000000400000-0x00000000023AC000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
760	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1060	eufive_20210830-223756.exe
1060	eufive_20210830-223756.exe
1060	eufive_20210830-223756.exe
1060	eufive_20210830-223756.exe
1060	eufive_20210830-223756.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 1 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	eufive_20210830-223756.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
432	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1060 wrote to memory of 760	1060	eufive_20210830-223756.exe	31
PID 1060 wrote to memory of 760	1060	eufive_20210830-223756.exe	31
PID 1060 wrote to memory of 760	1060	eufive_20210830-223756.exe	31
PID 1060 wrote to memory of 760	1060	eufive_20210830-223756.exe	31
PID 760 wrote to memory of 432	760	cmd.exe	33
PID 760 wrote to memory of 432	760	cmd.exe	33
PID 760 wrote to memory of 432	760	cmd.exe	33
PID 760 wrote to memory of 432	760	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\eufive_20210830-223756.exe
"C:\Users\Admin\AppData\Local\Temp\eufive_20210830-223756.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\eufive_20210830-223756.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:432

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/1060-60-0x0000000000020000-0x0000000000039000-memory.dmp

Filesize
100KB

Download
memory/1060-61-0x0000000000400000-0x00000000023AC000-memory.dmp

Filesize
31.7MB

Download
memory/1060-62-0x0000000075AF1000-0x0000000075AF3000-memory.dmp

Filesize
8KB

Download

Analysis

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