arkei | b8e7037873743a1e455171c6c18a27a60e7ff0ac011365ea8278ecad501273d6

Analysis

max time kernel
34s
max time network
119s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2023 06:49

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General

Target

2244-0-0x0000000000400000-0x000000000043D000-memory.exe
Size

244KB
MD5

fbe0a3246f0236a8f9355d909fabb68c
SHA1

2ab9d996996176a0ad125e806ab7cd84f20351e4
SHA256

b8e7037873743a1e455171c6c18a27a60e7ff0ac011365ea8278ecad501273d6
SHA512

3ebbaa48d96934d01c09ba2dc85b6205d0cb5eba63f028b8826a2d5c93e91730077f237f20efa5c9f517b43e18ae6647e8be165b33b6b1dfa46493f303ffd9a6
SSDEEP

3072:Um/E8k9ZjpIL+zNch12KbAwSaS/JSp8+b:N/E8k91zz6/tl

Score

10^/10

arkei stealer

Malware Config

Signatures

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

Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description	ioc	process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{162005B7-C31F-41B8-8381-37AC00CA83CB}.catalogItem	svchost.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4864 5084 WerFault.exe 2244-0-0x0000000000400000-0x000000000043D000-memory.exe

pid	pid_target	process	target process
4864	5084	WerFault.exe	2244-0-0x0000000000400000-0x000000000043D000-memory.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

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

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:3220

C:\Users\Admin\AppData\Local\Temp\2244-0-0x0000000000400000-0x000000000043D000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\2244-0-0x0000000000400000-0x000000000043D000-memory.exe"
1⤵
PID:5084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5084 -s 216
2⤵
- Program crash
PID:4864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5084 -ip 5084
1⤵
PID:2040

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/5084-0-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

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