arkei | b0ffdeb93d45ef22371b46cf607a43a75e24568a9bc784187489c0761c3481ec

General

Target
7cbc2100b9698ae41f88e0cfbf6037ae.exe
Size 190KB
Sample211124-ybtx3sdeep
SHA256 b0ffdeb93d45ef22371b46cf607a43a75e24568a9bc784187489c0761c3481ec
MD5 7cbc2100b9698ae41f88e0cfbf6037ae
SHA1 8fa3993b7782a8cb8c117f8a7457af7b4f0c2eea
SHA512 5b1f797715500fb2629a85093a1f37de22939c5d521091e89b3161a4e29d8614630d4b360146886330e4c32e062a3d1ffa933ae3d9d5fbeec64c3d9898dc5baf
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/1612-57-0x0000000000240000-0x0000000000261000-memory.dmp	family_arkei
behavioral1/memory/1612-58-0x0000000000400000-0x0000000000437000-memory.dmp	family_arkei

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1924	cmd.exe

Loads dropped DLL 5 IoCs

pid	Process
1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe
1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe
1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe
1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe
1612	7cbc2100b9698ae41f88e0cfbf6037ae.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	7cbc2100b9698ae41f88e0cfbf6037ae.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	7cbc2100b9698ae41f88e0cfbf6037ae.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1956	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 1924	1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe	30
PID 1612 wrote to memory of 1924	1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe	30
PID 1612 wrote to memory of 1924	1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe	30
PID 1612 wrote to memory of 1924	1612	7cbc2100b9698ae41f88e0cfbf6037ae.exe	30
PID 1924 wrote to memory of 1956	1924	cmd.exe	32
PID 1924 wrote to memory of 1956	1924	cmd.exe	32
PID 1924 wrote to memory of 1956	1924	cmd.exe	32
PID 1924 wrote to memory of 1956	1924	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\7cbc2100b9698ae41f88e0cfbf6037ae.exe
"C:\Users\Admin\AppData\Local\Temp\7cbc2100b9698ae41f88e0cfbf6037ae.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\7cbc2100b9698ae41f88e0cfbf6037ae.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1924
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1956

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/1612-55-0x0000000075491000-0x0000000075493000-memory.dmp

Download

memory/1612-57-0x0000000000240000-0x0000000000261000-memory.dmp

Download

memory/1612-56-0x0000000000220000-0x0000000000234000-memory.dmp

Download

memory/1612-58-0x0000000000400000-0x0000000000437000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads