arkei | a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334

General

Target
a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe
Size 336KB
Sample220117-n6cbeaaccm
SHA256 a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334
MD5 2fd09b6fbbe6857f8d5fd23cd64219a1
SHA1 e66d1df65222f9e0e847a38b864f9a1c39033c3d
SHA512 16a0f45f11db0debb73b53b8ca466204fa071a046fb322d3d020e3efcbffac354f8baa2bf48dac829d6e23ff17a93004160e55e7557ede4ff646c3724dbc2f53
MD5 SHA1 SHA512

Score

10^/10

arkei homesteadr discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

homesteadr

C2

http://homesteadr.link/ggate.php

Signatures

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

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3928 created 4028	3928	WerFault.exe	51

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/4028-132-0x0000000000400000-0x00000000005DC000-memory.dmp	family_arkei
behavioral1/memory/4028-131-0x0000000000930000-0x000000000094C000-memory.dmp	family_arkei

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe

Loads dropped DLL 3 IoCs

pid	Process
4028	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe
4028	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe
4028	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2984	4028	WerFault.exe	51

Checks processor information in registry 2 TTPs 7 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	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MusNotification.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	MusNotification.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2888	timeout.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2984	WerFault.exe
2984	WerFault.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1952	MusNotification.exe
Token: SeCreatePagefilePrivilege	1952	MusNotification.exe
Token: SeRestorePrivilege	2984	WerFault.exe
Token: SeBackupPrivilege	2984	WerFault.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4028 wrote to memory of 3840	4028	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe	59
PID 4028 wrote to memory of 3840	4028	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe	59
PID 4028 wrote to memory of 3840	4028	a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe	59
PID 3840 wrote to memory of 2888	3840	cmd.exe	62
PID 3840 wrote to memory of 2888	3840	cmd.exe	62
PID 3840 wrote to memory of 2888	3840	cmd.exe	62
PID 3928 wrote to memory of 4028	3928	WerFault.exe	51
PID 3928 wrote to memory of 4028	3928	WerFault.exe	51

C:\Users\Admin\AppData\Local\Temp\a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe
"C:\Users\Admin\AppData\Local\Temp\a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\a74a33005f023e5239a671a89c969e524c49e3b0a2e20fdef22609ce0c5b4334.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3840
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 1544
  2⤵
  - Program crash
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2984

C:\Windows\system32\MusNotification.exe
C:\Windows\system32\MusNotification.exe
1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
PID:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4028 -ip 4028
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:3928

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

4

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/4028-130-0x0000000000978000-0x0000000000989000-memory.dmp

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memory/4028-132-0x0000000000400000-0x00000000005DC000-memory.dmp

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memory/4028-131-0x0000000000930000-0x000000000094C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads