arkei | f8e0071b5a217e2caf3193ff532db9cdff04a9bb61090518204d46e05f8d3ec3

General

Target

4a50407aa5853e81c080bb645275d056.exe
Size

386KB
MD5

4a50407aa5853e81c080bb645275d056
SHA1

da95b3398334929fbe7823386fdf5e8eddc3a485
SHA256

f8e0071b5a217e2caf3193ff532db9cdff04a9bb61090518204d46e05f8d3ec3
SHA512

f587ad89a7d3e1e4834dbe36364bd0be29d9d9b3ba2ba05fa6359ce0d1d7add860f6eefa1f425f547346b907c85e5f8f31a426dac6fd5dc9874ba6068893193d

Score

10^/10

arkei default discovery spyware stealer suricata

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei
suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil
suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil
suricata

Deletes itself 1 IoCs

pid	Process
1152	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1512	4a50407aa5853e81c080bb645275d056.exe
1512	4a50407aa5853e81c080bb645275d056.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 1396 set thread context of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4a50407aa5853e81c080bb645275d056.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	4a50407aa5853e81c080bb645275d056.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
820	timeout.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1396 wrote to memory of 1512	1396	4a50407aa5853e81c080bb645275d056.exe	26
PID 1512 wrote to memory of 1152	1512	4a50407aa5853e81c080bb645275d056.exe	29
PID 1512 wrote to memory of 1152	1512	4a50407aa5853e81c080bb645275d056.exe	29
PID 1512 wrote to memory of 1152	1512	4a50407aa5853e81c080bb645275d056.exe	29
PID 1512 wrote to memory of 1152	1512	4a50407aa5853e81c080bb645275d056.exe	29
PID 1152 wrote to memory of 820	1152	cmd.exe	31
PID 1152 wrote to memory of 820	1152	cmd.exe	31
PID 1152 wrote to memory of 820	1152	cmd.exe	31
PID 1152 wrote to memory of 820	1152	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\4a50407aa5853e81c080bb645275d056.exe
"C:\Users\Admin\AppData\Local\Temp\4a50407aa5853e81c080bb645275d056.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1396
- C:\Users\Admin\AppData\Local\Temp\4a50407aa5853e81c080bb645275d056.exe
  "C:\Users\Admin\AppData\Local\Temp\4a50407aa5853e81c080bb645275d056.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious use of WriteProcessMemory
  PID:1512
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\4a50407aa5853e81c080bb645275d056.exe" & exit
    3⤵
    - Deletes itself
    - Suspicious use of WriteProcessMemory
    PID:1152
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:820

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

\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
memory/1396-58-0x00000000002C0000-0x00000000002EA000-memory.dmp

Filesize
168KB

Download
memory/1396-56-0x000000000051C000-0x000000000053D000-memory.dmp

Filesize
132KB

Download
memory/1512-60-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1512-61-0x0000000076311000-0x0000000076313000-memory.dmp

Filesize
8KB

Download
memory/1512-62-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1512-63-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1512-59-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1512-54-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1512-85-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download

Analysis

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