arkei | d98129981f18ffdf2db5edd0fc09442cc35ac1458971ca0ed14fe58dcd0dd3e0

General

Target

03e81c8df40db6549e905d8832fa1b80.exe
Size

359KB
MD5

03e81c8df40db6549e905d8832fa1b80
SHA1

8653cebf8079fa38d845d12e424bcde4afd625b4
SHA256

d98129981f18ffdf2db5edd0fc09442cc35ac1458971ca0ed14fe58dcd0dd3e0
SHA512

b2999496aa5eb2ca90603a458d96523fc5795365c86e71d5a03cf79b2764ec572d4f1da15207836a78ec0df1b703b0efad46643945ffd5225c607abe5327c9e0

Score

10^/10

arkei default discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

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

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-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	03e81c8df40db6549e905d8832fa1b80.exe

Loads dropped DLL 2 IoCs

pid	Process
4216	03e81c8df40db6549e905d8832fa1b80.exe
4216	03e81c8df40db6549e905d8832fa1b80.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4780 set thread context of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84

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	03e81c8df40db6549e905d8832fa1b80.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	03e81c8df40db6549e905d8832fa1b80.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1288	timeout.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4780 wrote to memory of 4216	4780	03e81c8df40db6549e905d8832fa1b80.exe	84
PID 4216 wrote to memory of 4536	4216	03e81c8df40db6549e905d8832fa1b80.exe	89
PID 4216 wrote to memory of 4536	4216	03e81c8df40db6549e905d8832fa1b80.exe	89
PID 4216 wrote to memory of 4536	4216	03e81c8df40db6549e905d8832fa1b80.exe	89
PID 4536 wrote to memory of 1288	4536	cmd.exe	91
PID 4536 wrote to memory of 1288	4536	cmd.exe	91
PID 4536 wrote to memory of 1288	4536	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\03e81c8df40db6549e905d8832fa1b80.exe
"C:\Users\Admin\AppData\Local\Temp\03e81c8df40db6549e905d8832fa1b80.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4780
- C:\Users\Admin\AppData\Local\Temp\03e81c8df40db6549e905d8832fa1b80.exe
  "C:\Users\Admin\AppData\Local\Temp\03e81c8df40db6549e905d8832fa1b80.exe"
  2⤵
  - Checks computer location settings
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\03e81c8df40db6549e905d8832fa1b80.exe" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4536
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:1288

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
C:\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
memory/4216-131-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4216-133-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4216-136-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4216-137-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/4216-159-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4780-135-0x00000000021B0000-0x00000000021DA000-memory.dmp

Filesize
168KB

Download
memory/4780-134-0x000000000055D000-0x000000000057E000-memory.dmp

Filesize
132KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads