arkei | 64a44191e52ba66f1a7c4e35a2911d0aadda5f4678f513fa6d1a8a1dfa3c910e

General

Target

null.exe
Size

343KB
MD5

0c9fbe2b8445f43a1407508f609a65c5
SHA1

10dc04753f38e7e6050deff40a6a021e66211010
SHA256

64a44191e52ba66f1a7c4e35a2911d0aadda5f4678f513fa6d1a8a1dfa3c910e
SHA512

fe22b9ae47bef7d9e3e35e805dbbe1e99c0880770d018d224574930da1343770d758c342242caa8a0347329c73230a5e5808788a05abdd07eb1ebf0dd1600253

Score

10^/10

arkei homesteadr discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

homesteadr

C2

http://homesteadr.link/ggate.php

Signatures

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

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/3988-116-0x00000000001C0000-0x00000000001DC000-memory.dmp	family_arkei
behavioral2/memory/3988-117-0x0000000000400000-0x0000000000783000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
3988	null.exe
3988	null.exe
3988	null.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	null.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	null.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1648	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3988 wrote to memory of 3984	3988	null.exe	69
PID 3988 wrote to memory of 3984	3988	null.exe	69
PID 3988 wrote to memory of 3984	3988	null.exe	69
PID 3984 wrote to memory of 1648	3984	cmd.exe	71
PID 3984 wrote to memory of 1648	3984	cmd.exe	71
PID 3984 wrote to memory of 1648	3984	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\null.exe
"C:\Users\Admin\AppData\Local\Temp\null.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\null.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3984
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1648

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/3988-116-0x00000000001C0000-0x00000000001DC000-memory.dmp

Filesize
112KB

Download
memory/3988-117-0x0000000000400000-0x0000000000783000-memory.dmp

Filesize
3.5MB

Download

Analysis

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