Malware Analysis Report

2024-10-23 19:39

Sample ID 231216-vs4xtsdfe9
Target bffa608e609a6e2f67d01bb5f64ba70a.exe
SHA256 27c43e0863d1f53297dc16f09626d956c6f86cf3285bbd8eb8488eccb564fa66
Tags
arkei marsstealer default spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

27c43e0863d1f53297dc16f09626d956c6f86cf3285bbd8eb8488eccb564fa66

Threat Level: Known bad

The file bffa608e609a6e2f67d01bb5f64ba70a.exe was found to be: Known bad.

Malicious Activity Summary

arkei marsstealer default spyware stealer

Arkei

Mars Stealer

Loads dropped DLL

Accesses cryptocurrency files/wallets, possible credential harvesting

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Checks processor information in registry

Delays execution with timeout.exe

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-16 17:16

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-16 17:16

Reported

2023-12-16 17:18

Platform

win7-20231215-en

Max time kernel

118s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe"

Signatures

Arkei

stealer arkei

Mars Stealer

stealer marsstealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3040 set thread context of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 3040 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 2136 wrote to memory of 568 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 2136 wrote to memory of 568 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 2136 wrote to memory of 568 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 2136 wrote to memory of 568 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 568 wrote to memory of 1580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 568 wrote to memory of 1580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 568 wrote to memory of 1580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 568 wrote to memory of 1580 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe

"C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe" & exit

C:\Windows\SysWOW64\timeout.exe

timeout /t 5

Network

Country Destination Domain Proto
BG 91.92.250.149:80 91.92.250.149 tcp
BG 91.92.250.149:80 91.92.250.149 tcp
BG 91.92.250.149:80 91.92.250.149 tcp

Files

memory/3040-0-0x0000000000F70000-0x0000000001216000-memory.dmp

memory/3040-1-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

memory/3040-2-0x000000001B5D0000-0x000000001B650000-memory.dmp

memory/2136-3-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-5-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-13-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-11-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-9-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2136-16-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-7-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-19-0x0000000000400000-0x000000000043D000-memory.dmp

memory/3040-18-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

memory/2136-20-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2136-21-0x0000000060900000-0x0000000060992000-memory.dmp

\ProgramData\nss3.dll

MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

\ProgramData\mozglue.dll

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

memory/2136-61-0x0000000000400000-0x000000000043D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-16 17:16

Reported

2023-12-16 17:18

Platform

win10v2004-20231215-en

Max time kernel

140s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe"

Signatures

Mars Stealer

stealer marsstealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1264 set thread context of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1264 wrote to memory of 2812 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 2812 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 2812 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1264 wrote to memory of 3836 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe

"C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3836 -ip 3836

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3836 -s 1260

Network

Country Destination Domain Proto
US 8.8.8.8:53 21.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 177.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
BG 91.92.250.149:80 91.92.250.149 tcp
US 8.8.8.8:53 149.250.92.91.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 183.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 209.143.182.52.in-addr.arpa udp

Files

memory/1264-0-0x00000000001B0000-0x0000000000456000-memory.dmp

memory/1264-1-0x00007FFC393F0000-0x00007FFC39EB1000-memory.dmp

memory/1264-2-0x0000000000D40000-0x0000000000D50000-memory.dmp

memory/3836-3-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1264-4-0x00007FFC393F0000-0x00007FFC39EB1000-memory.dmp

memory/3836-6-0x0000000000400000-0x000000000043D000-memory.dmp

memory/3836-7-0x0000000000400000-0x000000000043D000-memory.dmp

memory/3836-8-0x0000000060900000-0x0000000060992000-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

memory/3836-59-0x0000000000400000-0x000000000043D000-memory.dmp