arkei | c73fbcd3422e85b23bfa0e2d65ee0b35ecb344c7f1fe4d2827e45339137b356c

General

Target
6a3737493b3835b7d650b1cbc09d8e5b.exe
Size 324KB
Sample220311-xnn2xsdhal
SHA256 c73fbcd3422e85b23bfa0e2d65ee0b35ecb344c7f1fe4d2827e45339137b356c
MD5 6a3737493b3835b7d650b1cbc09d8e5b
SHA1 f56bdf2b93e48c87a758090be3809207c3661283
SHA512 4ca78cedbb3426a312831c8d3acfe5aefcc9df1b782f3bcf0ba2a3de346491842a3e81d43f3ee46f66397ebb33827512f2c519128fc0140f6000123055ac3b92
MD5 SHA1 SHA512

Score

10^/10

arkei default discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://tafun.link/51874.php

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	6a3737493b3835b7d650b1cbc09d8e5b.exe

Loads dropped DLL 2 IoCs

pid	Process
2432	6a3737493b3835b7d650b1cbc09d8e5b.exe
2432	6a3737493b3835b7d650b1cbc09d8e5b.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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1376	2432	WerFault.exe	78

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	6a3737493b3835b7d650b1cbc09d8e5b.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	6a3737493b3835b7d650b1cbc09d8e5b.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4176	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 1716	2432	6a3737493b3835b7d650b1cbc09d8e5b.exe	86
PID 2432 wrote to memory of 1716	2432	6a3737493b3835b7d650b1cbc09d8e5b.exe	86
PID 2432 wrote to memory of 1716	2432	6a3737493b3835b7d650b1cbc09d8e5b.exe	86
PID 1716 wrote to memory of 4176	1716	cmd.exe	90
PID 1716 wrote to memory of 4176	1716	cmd.exe	90
PID 1716 wrote to memory of 4176	1716	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\6a3737493b3835b7d650b1cbc09d8e5b.exe
"C:\Users\Admin\AppData\Local\Temp\6a3737493b3835b7d650b1cbc09d8e5b.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\6a3737493b3835b7d650b1cbc09d8e5b.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1716
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:4176
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2432 -s 1588
  2⤵
  - Program crash
  PID:1376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2432 -ip 2432
1⤵
PID:4192

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2432-130-0x00000000005ED000-0x0000000000605000-memory.dmp

Download

memory/2432-131-0x00000000005ED000-0x0000000000605000-memory.dmp

Download

memory/2432-132-0x00000000021D0000-0x00000000021F9000-memory.dmp

Download

memory/2432-133-0x0000000000400000-0x000000000047C000-memory.dmp

Download

memory/2432-134-0x0000000060900000-0x0000000060992000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads