Malware Analysis Report

2025-04-13 10:41

Sample ID 220507-e6931aegan
Target zxcvb.exekfxfuesu
SHA256 df4876573295b4e7beb618db31a015ea617f61b811978bb168d432c4052f7731
Tags
arkei default stealer suricata
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

df4876573295b4e7beb618db31a015ea617f61b811978bb168d432c4052f7731

Threat Level: Known bad

The file zxcvb.exekfxfuesu was found to be: Known bad.

Malicious Activity Summary

arkei default stealer suricata

Arkei

suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA or USERPROFILE Environment Variable M4

Checks computer location settings

Loads dropped DLL

Suspicious use of SetThreadContext

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-05-07 04:34

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-05-07 04:34

Reported

2022-05-07 04:47

Platform

win7-20220414-en

Max time kernel

149s

Max time network

187s

Command Line

"C:\Users\Admin\AppData\Local\Temp\zxcvb.exe"

Signatures

Arkei

stealer arkei

suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA or USERPROFILE Environment Variable M4

suricata

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\zxcvb.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 908 set thread context of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 908 wrote to memory of 1784 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Processes

C:\Users\Admin\AppData\Local\Temp\zxcvb.exe

"C:\Users\Admin\AppData\Local\Temp\zxcvb.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Network

Country Destination Domain Proto
SC 185.215.113.89:80 185.215.113.89 tcp
US 8.8.8.8:53 rockrock.ug udp
SC 185.215.113.89:80 rockrock.ug tcp
SC 185.215.113.89:80 rockrock.ug tcp

Files

memory/908-54-0x00000000013E0000-0x00000000013FE000-memory.dmp

memory/908-55-0x00000000763E1000-0x00000000763E3000-memory.dmp

memory/908-56-0x0000000008710000-0x0000000008874000-memory.dmp

memory/908-57-0x00000000011F0000-0x0000000001238000-memory.dmp

memory/1784-58-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-59-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-61-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-63-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-64-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-66-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-67-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-68-0x000000000043C0B2-mapping.dmp

memory/1784-70-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1784-71-0x0000000000400000-0x000000000043D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-07 04:34

Reported

2022-05-07 04:47

Platform

win10v2004-20220414-en

Max time kernel

169s

Max time network

176s

Command Line

"C:\Users\Admin\AppData\Local\Temp\zxcvb.exe"

Signatures

Arkei

stealer arkei

suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA or USERPROFILE Environment Variable M4

suricata

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\zxcvb.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3912 set thread context of 4980 N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\zxcvb.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\zxcvb.exe

"C:\Users\Admin\AppData\Local\Temp\zxcvb.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 4980 -ip 4980

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4980 -s 1348

Network

Country Destination Domain Proto
US 216.239.36.21:80 tcp
US 20.189.173.14:443 tcp
SC 185.215.113.89:80 185.215.113.89 tcp
NL 104.110.191.140:80 tcp
US 8.8.8.8:53 rockrock.ug udp
SC 185.215.113.89:80 rockrock.ug tcp
US 34.117.168.233:443 tcp

Files

memory/3912-130-0x0000000000080000-0x000000000009E000-memory.dmp

memory/3912-131-0x0000000005070000-0x0000000005614000-memory.dmp

memory/3912-132-0x0000000004AC0000-0x0000000004B52000-memory.dmp

memory/3912-133-0x0000000004A50000-0x0000000004A5A000-memory.dmp

memory/4980-134-0x0000000000000000-mapping.dmp

memory/4980-135-0x0000000000400000-0x000000000043D000-memory.dmp

memory/4980-137-0x0000000000400000-0x000000000043D000-memory.dmp

memory/4980-138-0x0000000000400000-0x000000000043D000-memory.dmp

memory/4980-139-0x0000000060900000-0x0000000060992000-memory.dmp

C:\ProgramData\nss3.dll

MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

C:\ProgramData\mozglue.dll

MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89