arkei | 4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb

General

Target
4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe
Size 321KB
Sample220115-a13phsbfb4
SHA256 4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb
MD5 e914291a04849d5beb4a43969155c486
SHA1 85ff3f7115cda99e31a21fddfed36197b4b673d5
SHA512 2450f07c8daeb908b36470ddec9b2b9025b6fd486da622ebfde621d43cecec874c8e88e8cfc5224fb0b0268e7aeec49f9011b63fdd51ece7fc17ecd5210175cd
MD5 SHA1 SHA512

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 1 IoCs

stealer

resource	yara_rule
behavioral1/memory/2448-117-0x0000000000400000-0x0000000000560000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
2448	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe
2448	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe
2448	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.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	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2748	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 1396	2448	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe	69
PID 2448 wrote to memory of 1396	2448	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe	69
PID 2448 wrote to memory of 1396	2448	4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe	69
PID 1396 wrote to memory of 2748	1396	cmd.exe	71
PID 1396 wrote to memory of 2748	1396	cmd.exe	71
PID 1396 wrote to memory of 2748	1396	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe
"C:\Users\Admin\AppData\Local\Temp\4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\4017f2124bbff8830e52c96a36f07498e3ad0d8c46096279117c799bf72af9eb.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1396
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2748

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

Loading Replay Monitor...

Downloads

memory/2448-117-0x0000000000400000-0x0000000000560000-memory.dmp

Download

memory/2448-116-0x0000000000560000-0x000000000060E000-memory.dmp