Malware Analysis Report

2024-08-06 14:52

Sample ID 240416-z5mljaed5y
Target 3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe
SHA256 3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255
Tags
marsstealer default stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255

Threat Level: Known bad

The file 3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe was found to be: Known bad.

Malicious Activity Summary

marsstealer default stealer

Mars Stealer

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-04-16 21:18

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-16 21:18

Reported

2024-04-16 21:20

Platform

win7-20240221-en

Max time kernel

144s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2952 wrote to memory of 2096 N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe
PID 2952 wrote to memory of 2096 N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe
PID 2952 wrote to memory of 2096 N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe
PID 2952 wrote to memory of 2096 N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe

Processes

C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe

"C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe"

C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe

"C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 kenesrakishev.net udp
US 173.201.180.75:80 kenesrakishev.net tcp
US 173.201.180.75:80 kenesrakishev.net tcp
US 173.201.180.75:80 kenesrakishev.net tcp

Files

memory/2952-0-0x0000000000030000-0x00000000000A6000-memory.dmp

memory/2952-1-0x0000000074030000-0x000000007471E000-memory.dmp

memory/2952-2-0x00000000005D0000-0x0000000000610000-memory.dmp

\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\WXIEDFW8RB.exe

MD5 00333d129e6ef188664819662a141476
SHA1 41605ab3ceffff75a4abd29d2df0fe26bc7de8a1
SHA256 82314104e7bccbced4fbe95a65273d88678b183e45f4fffa8abf2a4ee6a06ee7
SHA512 cb762a2b092fe00ce7c6b99816084dfd6d34d59dde8eb6ccad5f8c031f892f0a495fce7e8600e8fdcd3989f828813a06a5dc23feeb5f2ba7c8c649b9f0a8a150

memory/2952-7-0x0000000002010000-0x000000000204D000-memory.dmp

memory/2952-13-0x0000000074030000-0x000000007471E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-16 21:18

Reported

2024-04-16 21:20

Platform

win10v2004-20240412-en

Max time kernel

148s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe"

Signatures

Mars Stealer

stealer marsstealer

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Templates\FLO10WTGWDO.exe N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2200 wrote to memory of 1944 N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe C:\ProgramData\Templates\FLO10WTGWDO.exe
PID 2200 wrote to memory of 1944 N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe C:\ProgramData\Templates\FLO10WTGWDO.exe
PID 2200 wrote to memory of 1944 N/A C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe C:\ProgramData\Templates\FLO10WTGWDO.exe

Processes

C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe

"C:\Users\Admin\AppData\Local\Temp\3c71bf86bdeb35c1b8b178e99f3193efabf63a55abebb3356426b731c362a255.exe"

C:\ProgramData\Templates\FLO10WTGWDO.exe

"C:\ProgramData\Templates\FLO10WTGWDO.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 kenesrakishev.net udp
US 173.201.180.75:80 kenesrakishev.net tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 173.201.180.75:80 kenesrakishev.net tcp
US 52.111.229.48:443 tcp
US 8.8.8.8:53 101.58.20.217.in-addr.arpa udp
US 173.201.180.75:80 kenesrakishev.net tcp
US 8.8.8.8:53 8.167.79.40.in-addr.arpa udp

Files

memory/2200-0-0x0000000000DF0000-0x0000000000E66000-memory.dmp

memory/2200-1-0x0000000074F80000-0x0000000075730000-memory.dmp

memory/2200-2-0x00000000058B0000-0x00000000058C0000-memory.dmp

C:\ProgramData\Microsoft\Windows\Templates\FLO10WTGWDO.exe

MD5 00333d129e6ef188664819662a141476
SHA1 41605ab3ceffff75a4abd29d2df0fe26bc7de8a1
SHA256 82314104e7bccbced4fbe95a65273d88678b183e45f4fffa8abf2a4ee6a06ee7
SHA512 cb762a2b092fe00ce7c6b99816084dfd6d34d59dde8eb6ccad5f8c031f892f0a495fce7e8600e8fdcd3989f828813a06a5dc23feeb5f2ba7c8c649b9f0a8a150

memory/1944-13-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2200-14-0x0000000074F80000-0x0000000075730000-memory.dmp