arkei | 488ba7404082cc16e852e7a284bb962f67563c82ab7fc43dd7bdba6b8a5b4de2

General

Target
88dc235aa4a6fb4358824eb9ff54761f.exe
Size 342KB
Sample211129-x1hexafff2
SHA256 488ba7404082cc16e852e7a284bb962f67563c82ab7fc43dd7bdba6b8a5b4de2
MD5 88dc235aa4a6fb4358824eb9ff54761f
SHA1 b0af38056ca15bf2cfa961a6d835a14857dbe402
SHA512 4338ac7deb4e1e424da37db8f5d2af3913884f8114b06243a8ad62e40103267750524810589fd7a5f9ba270faae41077b776ee34616bae853c6f964b89e05e8d
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
behavioral2/memory/2412-116-0x0000000003680000-0x00000000036A1000-memory.dmp	family_arkei
behavioral2/memory/2412-117-0x0000000000400000-0x0000000003231000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
2412	88dc235aa4a6fb4358824eb9ff54761f.exe
2412	88dc235aa4a6fb4358824eb9ff54761f.exe
2412	88dc235aa4a6fb4358824eb9ff54761f.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	88dc235aa4a6fb4358824eb9ff54761f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	88dc235aa4a6fb4358824eb9ff54761f.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1652	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 3248	2412	88dc235aa4a6fb4358824eb9ff54761f.exe	69
PID 2412 wrote to memory of 3248	2412	88dc235aa4a6fb4358824eb9ff54761f.exe	69
PID 2412 wrote to memory of 3248	2412	88dc235aa4a6fb4358824eb9ff54761f.exe	69
PID 3248 wrote to memory of 1652	3248	cmd.exe	71
PID 3248 wrote to memory of 1652	3248	cmd.exe	71
PID 3248 wrote to memory of 1652	3248	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\88dc235aa4a6fb4358824eb9ff54761f.exe
"C:\Users\Admin\AppData\Local\Temp\88dc235aa4a6fb4358824eb9ff54761f.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\88dc235aa4a6fb4358824eb9ff54761f.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3248
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1652

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/2412-116-0x0000000003680000-0x00000000036A1000-memory.dmp

Download

memory/2412-117-0x0000000000400000-0x0000000003231000-memory.dmp