Malware Analysis Report

2024-09-11 14:06

Sample ID 240615-exwt1syeqd
Target s3.exe
SHA256 41c277b3d567ac5449e29328212596efe8c16bf58bc9043b70a14d7142111163
Tags
xworm execution rat trojan
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 Overview

score
10/10

SHA256

41c277b3d567ac5449e29328212596efe8c16bf58bc9043b70a14d7142111163

Threat Level: Known bad

The file s3.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution rat trojan

Xworm family

Xworm

Detect Xworm Payload

Command and Scripting Interpreter: PowerShell

Looks up external IP address via web service

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Creates scheduled task(s)

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Command and Scripting Interpreter
T1059
PowerShell
T1059.001
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
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
Web Service
T1102
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-15 04:19

Signatures

Detect Xworm Payload

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

Xworm family

xworm

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-15 04:19

Reported

2024-06-15 04:20

Platform

win11-20240611-en

Max time kernel

28s

Max time network

31s

Command Line

"C:\Users\Admin\AppData\Local\Temp\s3.exe"

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A

Looks up external IP address via web service

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

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\s3.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\s3.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\s3.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\s3.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3936 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 2548 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 2548 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 4528 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 4528 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3936 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\schtasks.exe
PID 3936 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\s3.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\s3.exe

"C:\Users\Admin\AppData\Local\Temp\s3.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\s3.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 's3.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\rundll64.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'rundll64.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "rundll64" /tr "C:\Users\Admin\AppData\Local\rundll64.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
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 104.20.3.235:443 pastebin.com tcp
US 64.188.16.134:7861 tcp
US 64.188.16.134:7861 tcp

Files

memory/3936-0-0x00007FFEAE493000-0x00007FFEAE495000-memory.dmp

memory/3936-1-0x0000000000D30000-0x0000000000D42000-memory.dmp

memory/3936-2-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jios3jek.u5s.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4356-8-0x0000028FCB750000-0x0000028FCB772000-memory.dmp

memory/4356-9-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp

memory/4356-13-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp

memory/4356-14-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp

memory/4356-15-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp

memory/4356-16-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp

memory/4356-19-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 2e8eb51096d6f6781456fef7df731d97
SHA1 ec2aaf851a618fb43c3d040a13a71997c25bda43
SHA256 96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864
SHA512 0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 f6146e84c1404ad55bc73e3dac09e5ce
SHA1 c6ca5bfb670960fbd22dca6f1b35988b00ac92eb
SHA256 4def91aea2c4de54e5dd6e2b30748e65e7dce1d1b2af9e3c5b18394ab0973743
SHA512 1de14b45abf85788008f48597e55e0839c8b93347789f7ecd0fb4921c04df74c95dd2b3d7264c9cb507b3005cd436c96f908d314c66303be4e15229eab881cae

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 906523560f8af295fe0b398799658002
SHA1 b6b3d1f077ae0c39ac71d138630744856c0e424d
SHA256 9f1750afbd8fd87ce27d8ecb32a9dfc9247ca360055a34fb25780c3685995ced
SHA512 4dacd67d05b3648ce9ec59833aeca1c4683e25a8c0ab13297bede5168487e3c9a0608b9c93bb4e3baa2bd3a5414672f62c55b7386813d814e2cb44cd926f566b

memory/3936-52-0x000000001C840000-0x000000001C84C000-memory.dmp

memory/3936-53-0x00007FFEAE490000-0x00007FFEAEF52000-memory.dmp