arkei | 2e5e3591dfd701f78ff7a8e3773a0bfb23c7d291875276c7497579fef08f872e

General

Target
561d55e430e7fb7d2089f61d781dd395.exe
Size 241KB
Sample220203-kwl63sehf2
SHA256 2e5e3591dfd701f78ff7a8e3773a0bfb23c7d291875276c7497579fef08f872e
MD5 561d55e430e7fb7d2089f61d781dd395
SHA1 2ef0df0dbc2ba729cb82476167a4bb8a86c4c350
SHA512 e7b655ae8da4fdca8b68bcc3808ab699bc4f849102ca6700516eaae6e581e054f58fc984dddcd5164f9f855d00cc1e8a2b9ece1974e984dc152770e151c558f0
MD5 SHA1 SHA512

Score

10^/10

arkei default discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://coin-file-file-19.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/1072-55-0x00000000002E0000-0x00000000002FC000-memory.dmp	family_arkei
behavioral1/memory/1072-56-0x0000000000400000-0x0000000002C20000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1392	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1072	561d55e430e7fb7d2089f61d781dd395.exe
1072	561d55e430e7fb7d2089f61d781dd395.exe
1072	561d55e430e7fb7d2089f61d781dd395.exe
1072	561d55e430e7fb7d2089f61d781dd395.exe
1072	561d55e430e7fb7d2089f61d781dd395.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	561d55e430e7fb7d2089f61d781dd395.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	561d55e430e7fb7d2089f61d781dd395.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
812	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1072 wrote to memory of 1392	1072	561d55e430e7fb7d2089f61d781dd395.exe	29
PID 1072 wrote to memory of 1392	1072	561d55e430e7fb7d2089f61d781dd395.exe	29
PID 1072 wrote to memory of 1392	1072	561d55e430e7fb7d2089f61d781dd395.exe	29
PID 1072 wrote to memory of 1392	1072	561d55e430e7fb7d2089f61d781dd395.exe	29
PID 1392 wrote to memory of 812	1392	cmd.exe	31
PID 1392 wrote to memory of 812	1392	cmd.exe	31
PID 1392 wrote to memory of 812	1392	cmd.exe	31
PID 1392 wrote to memory of 812	1392	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\561d55e430e7fb7d2089f61d781dd395.exe
"C:\Users\Admin\AppData\Local\Temp\561d55e430e7fb7d2089f61d781dd395.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1072
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\561d55e430e7fb7d2089f61d781dd395.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1392
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:812

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/1072-54-0x00000000002A0000-0x00000000002B1000-memory.dmp

Download

memory/1072-55-0x00000000002E0000-0x00000000002FC000-memory.dmp

Download

memory/1072-56-0x0000000000400000-0x0000000002C20000-memory.dmp

Download

memory/1072-57-0x0000000076121000-0x0000000076123000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads