arkei | f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202

General

Target

f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe
Size

342KB
MD5

14b619ec65172a9dfa91a216201d441c
SHA1

f1c38546761477c69dd054c24bf4f52ca5ab6b73
SHA256

f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202
SHA512

11311325f9c6f618a0fee17b17ed1b637b00d63a4a9a950d65f81847c08c7c83e68ccf225164637c7978c751ffb2c282dc4638d0a0c00a90722a4dc11d3a0713

Score

10^/10

arkei default discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://file-file-host4.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/2540-117-0x0000000000400000-0x000000000277D000-memory.dmp	family_arkei
behavioral1/memory/2540-116-0x00000000029F0000-0x0000000002A11000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
2540	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe
2540	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe
2540	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.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	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3672	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 3540	2540	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe	69
PID 2540 wrote to memory of 3540	2540	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe	69
PID 2540 wrote to memory of 3540	2540	f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe	69
PID 3540 wrote to memory of 3672	3540	cmd.exe	71
PID 3540 wrote to memory of 3672	3540	cmd.exe	71
PID 3540 wrote to memory of 3672	3540	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe
"C:\Users\Admin\AppData\Local\Temp\f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\f73083131c826bacf43061f3e7a83946be04b2a2c4c7ad0170574f381206f202.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3540
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:3672

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/2540-115-0x0000000002A79000-0x0000000002A8D000-memory.dmp

Filesize
80KB

Download
memory/2540-117-0x0000000000400000-0x000000000277D000-memory.dmp

Filesize
35.5MB

Download
memory/2540-116-0x00000000029F0000-0x0000000002A11000-memory.dmp

Filesize
132KB

Download

Analysis

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