arkei | f41503e7b6f5ce811b27f8ff160b1b0d60a437d36c9db6327e254a910f405a4f

General

Target
71a63fa7419177239910ef20940b5da1.exe
Size 204KB
Sample211120-jxp4pacean
SHA256 f41503e7b6f5ce811b27f8ff160b1b0d60a437d36c9db6327e254a910f405a4f
MD5 71a63fa7419177239910ef20940b5da1
SHA1 8ed778a268852a39c3991b3f8aedec381b93944b
SHA512 7032cc874d58dc6f5d0342a9dd2aa829681f5265cc80a35811499807373d5b0bbfcd83296ee1742036ef875c5e131ab4eba4bfc07627f38665843d3eef17134a
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 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/1080-57-0x00000000003D0000-0x00000000003F1000-memory.dmp	family_arkei
behavioral1/memory/1080-58-0x0000000000400000-0x000000000043B000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
968	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1080	71a63fa7419177239910ef20940b5da1.exe
1080	71a63fa7419177239910ef20940b5da1.exe
1080	71a63fa7419177239910ef20940b5da1.exe
1080	71a63fa7419177239910ef20940b5da1.exe
1080	71a63fa7419177239910ef20940b5da1.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	71a63fa7419177239910ef20940b5da1.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	71a63fa7419177239910ef20940b5da1.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1780	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 968	1080	71a63fa7419177239910ef20940b5da1.exe	30
PID 1080 wrote to memory of 968	1080	71a63fa7419177239910ef20940b5da1.exe	30
PID 1080 wrote to memory of 968	1080	71a63fa7419177239910ef20940b5da1.exe	30
PID 1080 wrote to memory of 968	1080	71a63fa7419177239910ef20940b5da1.exe	30
PID 968 wrote to memory of 1780	968	cmd.exe	32
PID 968 wrote to memory of 1780	968	cmd.exe	32
PID 968 wrote to memory of 1780	968	cmd.exe	32
PID 968 wrote to memory of 1780	968	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\71a63fa7419177239910ef20940b5da1.exe
"C:\Users\Admin\AppData\Local\Temp\71a63fa7419177239910ef20940b5da1.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1080
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\71a63fa7419177239910ef20940b5da1.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:968
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1780

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/1080-55-0x0000000075A61000-0x0000000075A63000-memory.dmp

Download

memory/1080-56-0x00000000003A0000-0x00000000003B4000-memory.dmp

Download

memory/1080-57-0x00000000003D0000-0x00000000003F1000-memory.dmp

Download

memory/1080-58-0x0000000000400000-0x000000000043B000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads