arkei | bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084

General

Target
bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe
Size 309KB
Sample220131-317yfseda2
SHA256 bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084
MD5 51333d00f617296e7cfaf04324665f0d
SHA1 ae9be7d2eadd0cded786eb7c77947a0b85532a49
SHA512 35271794bf12cad569bf46710885fc0e0bbf4e1e36503fe0b2f7f76f47d883a56f64e7a6eb4b3470c2568b32ffdca090b3867aa5fd108922d717ec2a9183cd4a
MD5 SHA1 SHA512

Score

10^/10

arkei default discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://coin-file-file-19.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/348-116-0x00000000001D0000-0x00000000001EC000-memory.dmp	family_arkei
behavioral1/memory/348-117-0x0000000000400000-0x0000000000476000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
348	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe
348	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe
348	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.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	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2824	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 348 wrote to memory of 3272	348	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe	71
PID 348 wrote to memory of 3272	348	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe	71
PID 348 wrote to memory of 3272	348	bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe	71
PID 3272 wrote to memory of 2824	3272	cmd.exe	73
PID 3272 wrote to memory of 2824	3272	cmd.exe	73
PID 3272 wrote to memory of 2824	3272	cmd.exe	73

C:\Users\Admin\AppData\Local\Temp\bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe
"C:\Users\Admin\AppData\Local\Temp\bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:348
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\bd3486e075b172b83321b895819f06bf7312cda2f24f41afb817bdfb9b3ad084.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3272
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2824

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/348-116-0x00000000001D0000-0x00000000001EC000-memory.dmp

Download

memory/348-117-0x0000000000400000-0x0000000000476000-memory.dmp