Malware Analysis Report

2025-08-05 11:00

Sample ID 241031-d7spnsyhrp
Target 91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe
SHA256 91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83
Tags
xworm discovery rat trojan
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

91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83

Threat Level: Known bad

The file 91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe was found to be: Known bad.

Malicious Activity Summary

xworm discovery rat trojan

Detect Xworm Payload

Xworm

Xworm family

Looks up external IP address via web service

Suspicious use of SetThreadContext

Program crash

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 03:39

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-31 03:39

Reported

2024-10-31 03:42

Platform

win7-20240903-en

Max time kernel

122s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe"

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Xworm family

xworm

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1672 set thread context of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1672 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Processes

C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe

"C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.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
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp

Files

memory/1672-0-0x00000000001EC000-0x00000000001ED000-memory.dmp

memory/2188-1-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2188-6-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2188-5-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

memory/2188-4-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2188-3-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2188-2-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2188-10-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2188-8-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2188-11-0x000000007442E000-0x000000007442F000-memory.dmp

memory/2188-12-0x0000000074420000-0x0000000074B0E000-memory.dmp

memory/2188-13-0x0000000074420000-0x0000000074B0E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 03:39

Reported

2024-10-31 03:42

Platform

win10v2004-20241007-en

Max time kernel

132s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe"

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Xworm family

xworm

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4568 set thread context of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4568 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Processes

C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.exe

"C:\Users\Admin\AppData\Local\Temp\91e36194bc1caf8580ad6f4c697f4086b7bc49ded8b05b8d379997c465d2ba83.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 456 -p 4916 -ip 4916

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 1692

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 105.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 70.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp

Files

memory/4568-0-0x00000000005DC000-0x00000000005DD000-memory.dmp

memory/4916-1-0x0000000000400000-0x0000000000410000-memory.dmp

memory/4916-2-0x00000000753FE000-0x00000000753FF000-memory.dmp

memory/4916-3-0x0000000005470000-0x000000000550C000-memory.dmp

memory/4916-4-0x0000000005510000-0x0000000005576000-memory.dmp

memory/4916-5-0x00000000753F0000-0x0000000075BA0000-memory.dmp

memory/4916-6-0x00000000753F0000-0x0000000075BA0000-memory.dmp