arkei | ee7bd39d4d29eb7d605e5ee83da5247cfe11e14f397a76d64bb781fcc29ef583

General

Target
a4856b5512c2c5ba4aa42483b0b5eb5c.exe
Size 226KB
Sample220304-h1392sdhd5
SHA256 ee7bd39d4d29eb7d605e5ee83da5247cfe11e14f397a76d64bb781fcc29ef583
MD5 a4856b5512c2c5ba4aa42483b0b5eb5c
SHA1 d246fe9cbcbd8df45e53a40528ec8b3b23c35353
SHA512 e39cd95a686bf850f85a9984b3a3b9efc06ac27a4abaaa284be0da111b612e4c0668b8db8ae7d3d1a38e1ca15e1cbbfa06e129ed1ee8cb73a1045c32f0e6ddac
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
Downloads MZ/PE file

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	a4856b5512c2c5ba4aa42483b0b5eb5c.exe

Loads dropped DLL 3 IoCs

pid	Process
4216	a4856b5512c2c5ba4aa42483b0b5eb5c.exe
4216	a4856b5512c2c5ba4aa42483b0b5eb5c.exe
4216	a4856b5512c2c5ba4aa42483b0b5eb5c.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	a4856b5512c2c5ba4aa42483b0b5eb5c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a4856b5512c2c5ba4aa42483b0b5eb5c.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2420	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4216 wrote to memory of 1968	4216	a4856b5512c2c5ba4aa42483b0b5eb5c.exe	88
PID 4216 wrote to memory of 1968	4216	a4856b5512c2c5ba4aa42483b0b5eb5c.exe	88
PID 4216 wrote to memory of 1968	4216	a4856b5512c2c5ba4aa42483b0b5eb5c.exe	88
PID 1968 wrote to memory of 2420	1968	cmd.exe	90
PID 1968 wrote to memory of 2420	1968	cmd.exe	90
PID 1968 wrote to memory of 2420	1968	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\a4856b5512c2c5ba4aa42483b0b5eb5c.exe
"C:\Users\Admin\AppData\Local\Temp\a4856b5512c2c5ba4aa42483b0b5eb5c.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:4216
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\a4856b5512c2c5ba4aa42483b0b5eb5c.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1968
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2420

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/4216-130-0x00000000021D0000-0x00000000021E3000-memory.dmp

Download

memory/4216-131-0x00000000021F0000-0x000000000220F000-memory.dmp

Download

memory/4216-132-0x0000000000400000-0x0000000000469000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads