arkei | b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2

General

Target

b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe
Size

316KB
MD5

a462b89517f859a66881609c088f3f74
SHA1

0b17d47d74448af3c4554a40467d0489ee2dbd2d
SHA256

b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2
SHA512

e1f027491450b75d59ebf9f7299e65de9ea621d8273c2db1973dd77913934d49fae32a73ac5ab65477d1fc20b52bee58a03994358a189122bcfb4dd14094791f

Score

10^/10

arkei default discovery spyware stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://file-file-host4.com/tratata.php

Signatures

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

Arkei Stealer Payload 2 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/3436-118-0x0000000000400000-0x000000000055F000-memory.dmp	family_arkei
behavioral1/memory/3436-117-0x00000000006E0000-0x00000000006FC000-memory.dmp	family_arkei

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

Processes:

b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe

pid	process
3436	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe
3436	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe
3436	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.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

Processes:

b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2040 timeout.exe

pid	process
2040	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.execmd.exe

description	pid	process	target process
PID 3436 wrote to memory of 952	3436	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe	cmd.exe
PID 3436 wrote to memory of 952	3436	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe	cmd.exe
PID 3436 wrote to memory of 952	3436	b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe	cmd.exe
PID 952 wrote to memory of 2040	952	cmd.exe	timeout.exe
PID 952 wrote to memory of 2040	952	cmd.exe	timeout.exe
PID 952 wrote to memory of 2040	952	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe
"C:\Users\Admin\AppData\Local\Temp\b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:3436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:952
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2040

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

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Downloads

\ProgramData\mozglue.dll

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\ProgramData\sqlite3.dll

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/952-122-0x0000000000000000-mapping.dmp

Download
memory/2040-123-0x0000000000000000-mapping.dmp

Download
memory/3436-116-0x00000000008FA000-0x000000000090B000-memory.dmp

Filesize
68KB

Download
memory/3436-118-0x0000000000400000-0x000000000055F000-memory.dmp

Filesize
1.4MB

Download
memory/3436-117-0x00000000006E0000-0x00000000006FC000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads