arkei | 2e24fa4b77253c4d1828ebb67824b0a891917bb79fde0accef9ca9576c4b30c2

General

Target
c46e7e24b453e720fc33dbff75c106f7.exe
Size 375KB
Sample211231-g67zragfc4
SHA256 2e24fa4b77253c4d1828ebb67824b0a891917bb79fde0accef9ca9576c4b30c2
MD5 c46e7e24b453e720fc33dbff75c106f7
SHA1 fd7cc0cb27ad684dad3aaa77f2e6e79358df330d
SHA512 660e1178ee0f970cb4bc97b4fbc79e578eddd5351df9f631accf66dde0685e0ba2271519583e7ab058f82091dd74eb641fb832c1fcff932d376ccbeba11634da
MD5 SHA1 SHA512

Score

10^/10

arkei discovery spyware stealer

Malware Config

Signatures

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

Arkei Stealer Payload 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/2608-116-0x00000000001C0000-0x00000000001DC000-memory.dmp	family_arkei
behavioral2/memory/2608-117-0x0000000000400000-0x0000000000C1F000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
2608	c46e7e24b453e720fc33dbff75c106f7.exe
2608	c46e7e24b453e720fc33dbff75c106f7.exe
2608	c46e7e24b453e720fc33dbff75c106f7.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	c46e7e24b453e720fc33dbff75c106f7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	c46e7e24b453e720fc33dbff75c106f7.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1012	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2608 wrote to memory of 912	2608	c46e7e24b453e720fc33dbff75c106f7.exe	69
PID 2608 wrote to memory of 912	2608	c46e7e24b453e720fc33dbff75c106f7.exe	69
PID 2608 wrote to memory of 912	2608	c46e7e24b453e720fc33dbff75c106f7.exe	69
PID 912 wrote to memory of 1012	912	cmd.exe	71
PID 912 wrote to memory of 1012	912	cmd.exe	71
PID 912 wrote to memory of 1012	912	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\c46e7e24b453e720fc33dbff75c106f7.exe
"C:\Users\Admin\AppData\Local\Temp\c46e7e24b453e720fc33dbff75c106f7.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2608
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\c46e7e24b453e720fc33dbff75c106f7.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:912
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1012

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/2608-116-0x00000000001C0000-0x00000000001DC000-memory.dmp

Download

memory/2608-117-0x0000000000400000-0x0000000000C1F000-memory.dmp