Malware Analysis Report

2024-10-23 19:39

Sample ID 231216-vtbmnsdff2
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

Unsigned PE

Program crash

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

Delays execution with timeout.exe

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

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 17:19

Platform

win7-20231215-en

Max time kernel

119s

Max time network

121s

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 284 set thread context of 1124 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 value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 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 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 284 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1124 wrote to memory of 544 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 544 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 544 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 544 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe C:\Windows\SysWOW64\cmd.exe
PID 544 wrote to memory of 2828 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 544 wrote to memory of 2828 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 544 wrote to memory of 2828 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 544 wrote to memory of 2828 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/284-0-0x00000000012C0000-0x0000000001566000-memory.dmp

memory/284-1-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

memory/284-2-0x000000001B2C0000-0x000000001B340000-memory.dmp

memory/1124-5-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-6-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-4-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-3-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-7-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-10-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1124-12-0x0000000000400000-0x000000000043D000-memory.dmp

memory/284-13-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

memory/1124-8-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-14-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1124-15-0x0000000060900000-0x0000000060992000-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/1124-52-0x0000000000400000-0x000000000043D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-16 17:16

Reported

2023-12-16 17:19

Platform

win10v2004-20231215-en

Max time kernel

138s

Max time network

145s

Command Line

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

Signatures

Mars Stealer

stealer marsstealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1940 set thread context of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe

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 1940 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 2416 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 4224 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 4224 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 4224 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\bffa608e609a6e2f67d01bb5f64ba70a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddinProcess32.exe
PID 1940 wrote to memory of 788 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\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 788 -ip 788

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 788 -s 1300

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 186.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 201.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 193.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 77.239.69.13.in-addr.arpa udp

Files

memory/1940-0-0x0000000000070000-0x0000000000316000-memory.dmp

memory/1940-1-0x00007FF997820000-0x00007FF9982E1000-memory.dmp

memory/1940-2-0x000000001AF50000-0x000000001AF60000-memory.dmp

memory/788-3-0x0000000000400000-0x000000000043D000-memory.dmp

memory/1940-4-0x00007FF997820000-0x00007FF9982E1000-memory.dmp

memory/788-6-0x0000000000400000-0x000000000043D000-memory.dmp

memory/788-7-0x0000000000400000-0x000000000043D000-memory.dmp

memory/788-8-0x0000000060900000-0x0000000060992000-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/788-59-0x0000000000400000-0x000000000043D000-memory.dmp