arkei | a1d583650ec7dc99e6c0c4009908358518a0be5fbe7cb6e2b3a50889bb5da3a1

General

Target

aec70ded586cfe6f9bae06560b0fe7a6.exe
Size

989KB
MD5

aec70ded586cfe6f9bae06560b0fe7a6
SHA1

8da695d69d3e3c3df85767b57c24f46576d1aeef
SHA256

a1d583650ec7dc99e6c0c4009908358518a0be5fbe7cb6e2b3a50889bb5da3a1
SHA512

14a2f13cb24652d0e3d230d5c05a90d9312ea26a7dacd81de9482fa87d7dab9b718c6af6be28ca7e747da156f136193b328cff662cd50d5f7fb8e684ead0edec

Score

10^/10

arkei default discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://185.7.214.239/POeNDXYchB.php

Signatures

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

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/2480-117-0x0000000001300000-0x0000000001460000-memory.dmp	family_arkei
behavioral2/memory/2480-118-0x0000000001300000-0x0000000001460000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
2480	aec70ded586cfe6f9bae06560b0fe7a6.exe
2480	aec70ded586cfe6f9bae06560b0fe7a6.exe
2480	aec70ded586cfe6f9bae06560b0fe7a6.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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2480	aec70ded586cfe6f9bae06560b0fe7a6.exe

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	aec70ded586cfe6f9bae06560b0fe7a6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	aec70ded586cfe6f9bae06560b0fe7a6.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3516	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2480	aec70ded586cfe6f9bae06560b0fe7a6.exe
2480	aec70ded586cfe6f9bae06560b0fe7a6.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2480 wrote to memory of 2356	2480	aec70ded586cfe6f9bae06560b0fe7a6.exe	68
PID 2480 wrote to memory of 2356	2480	aec70ded586cfe6f9bae06560b0fe7a6.exe	68
PID 2480 wrote to memory of 2356	2480	aec70ded586cfe6f9bae06560b0fe7a6.exe	68
PID 2356 wrote to memory of 3516	2356	cmd.exe	70
PID 2356 wrote to memory of 3516	2356	cmd.exe	70
PID 2356 wrote to memory of 3516	2356	cmd.exe	70

C:\Users\Admin\AppData\Local\Temp\aec70ded586cfe6f9bae06560b0fe7a6.exe
"C:\Users\Admin\AppData\Local\Temp\aec70ded586cfe6f9bae06560b0fe7a6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2480
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\aec70ded586cfe6f9bae06560b0fe7a6.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2356
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:3516

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/2480-115-0x00000000012A0000-0x00000000012E6000-memory.dmp

Filesize
280KB

Download
memory/2480-117-0x0000000001300000-0x0000000001460000-memory.dmp

Filesize
1.4MB

Download
memory/2480-116-0x0000000001300000-0x0000000001460000-memory.dmp

Filesize
1.4MB

Download
memory/2480-118-0x0000000001300000-0x0000000001460000-memory.dmp

Filesize
1.4MB

Download
memory/2480-119-0x00000000012F0000-0x00000000012F1000-memory.dmp

Filesize
4KB

Download
memory/2480-120-0x0000000074120000-0x00000000742E2000-memory.dmp

Filesize
1.8MB

Download

Analysis

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