arkei | 4bad031e24ba56c29df3e75647208ff2fd4332d6bbd43e6eae85aee6c169b70e

General

Target
48614a69bb6acd0afd67c90f8ee7bb6a.exe
Size 345KB
Sample220104-trcxaahcb6
SHA256 4bad031e24ba56c29df3e75647208ff2fd4332d6bbd43e6eae85aee6c169b70e
MD5 48614a69bb6acd0afd67c90f8ee7bb6a
SHA1 e45362acce5d997f57a53987a22d4e68b1b66663
SHA512 7eb1de5d452a44961e60aec577adf9551f4ff8c8aa8afa7fb6f506dd4608e49072d4300cc5175e5387a2fcdca40cb30275504e4aee595625e583dc42d90a4e28
MD5 SHA1 SHA512

Score

10^/10

arkei discovery spyware stealer

Malware Config

Signatures

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

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/1108-116-0x00000000004B0000-0x00000000004CC000-memory.dmp	family_arkei
behavioral2/memory/1108-117-0x0000000000400000-0x000000000046A000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
1108	48614a69bb6acd0afd67c90f8ee7bb6a.exe
1108	48614a69bb6acd0afd67c90f8ee7bb6a.exe
1108	48614a69bb6acd0afd67c90f8ee7bb6a.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	48614a69bb6acd0afd67c90f8ee7bb6a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	48614a69bb6acd0afd67c90f8ee7bb6a.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1824	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1108 wrote to memory of 4064	1108	48614a69bb6acd0afd67c90f8ee7bb6a.exe	69
PID 1108 wrote to memory of 4064	1108	48614a69bb6acd0afd67c90f8ee7bb6a.exe	69
PID 1108 wrote to memory of 4064	1108	48614a69bb6acd0afd67c90f8ee7bb6a.exe	69
PID 4064 wrote to memory of 1824	4064	cmd.exe	71
PID 4064 wrote to memory of 1824	4064	cmd.exe	71
PID 4064 wrote to memory of 1824	4064	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\48614a69bb6acd0afd67c90f8ee7bb6a.exe
"C:\Users\Admin\AppData\Local\Temp\48614a69bb6acd0afd67c90f8ee7bb6a.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\48614a69bb6acd0afd67c90f8ee7bb6a.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4064
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1824

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/1108-116-0x00000000004B0000-0x00000000004CC000-memory.dmp

Download

memory/1108-117-0x0000000000400000-0x000000000046A000-memory.dmp