arkei | 4fb9f08b1053d49ff58f30aa0016beefcd85041435ba9bb4b0402d99feb6df5e

General

Target
3f8a073be59c3c47bdf4e9a42273ae84.exe
Size 282KB
Sample220207-lnrx2aaha9
SHA256 4fb9f08b1053d49ff58f30aa0016beefcd85041435ba9bb4b0402d99feb6df5e
MD5 3f8a073be59c3c47bdf4e9a42273ae84
SHA1 5790779c7a63d48e933a6d38dc5d79a9288b9bde
SHA512 ac08879630a4d0a3380b9192d1733141a38306fa324662afcbbc3824ba1733ff35581cadbe1eb4b6bee18825e69c88e1eba94d877c2d3efde2eeb1580a883515
MD5 SHA1 SHA512

Score

10^/10

arkei dafault discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Dafault

C2

http://googe.link/gate1.php

Signatures

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

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/1452-55-0x0000000000220000-0x000000000023F000-memory.dmp	family_arkei
behavioral1/memory/1452-56-0x0000000000400000-0x0000000000471000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1064	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1452	3f8a073be59c3c47bdf4e9a42273ae84.exe
1452	3f8a073be59c3c47bdf4e9a42273ae84.exe
1452	3f8a073be59c3c47bdf4e9a42273ae84.exe
1452	3f8a073be59c3c47bdf4e9a42273ae84.exe
1452	3f8a073be59c3c47bdf4e9a42273ae84.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	3f8a073be59c3c47bdf4e9a42273ae84.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	3f8a073be59c3c47bdf4e9a42273ae84.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1804	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 1064	1452	3f8a073be59c3c47bdf4e9a42273ae84.exe	29
PID 1452 wrote to memory of 1064	1452	3f8a073be59c3c47bdf4e9a42273ae84.exe	29
PID 1452 wrote to memory of 1064	1452	3f8a073be59c3c47bdf4e9a42273ae84.exe	29
PID 1452 wrote to memory of 1064	1452	3f8a073be59c3c47bdf4e9a42273ae84.exe	29
PID 1064 wrote to memory of 1804	1064	cmd.exe	31
PID 1064 wrote to memory of 1804	1064	cmd.exe	31
PID 1064 wrote to memory of 1804	1064	cmd.exe	31
PID 1064 wrote to memory of 1804	1064	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\3f8a073be59c3c47bdf4e9a42273ae84.exe
"C:\Users\Admin\AppData\Local\Temp\3f8a073be59c3c47bdf4e9a42273ae84.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3f8a073be59c3c47bdf4e9a42273ae84.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1064
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1804

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/1452-54-0x0000000000650000-0x0000000000682000-memory.dmp

Download

memory/1452-55-0x0000000000220000-0x000000000023F000-memory.dmp

Download

memory/1452-56-0x0000000000400000-0x0000000000471000-memory.dmp

Download

memory/1452-57-0x0000000075B51000-0x0000000075B53000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads