Malware Analysis Report

2024-09-11 14:08

Sample ID 240615-fl3c4azblb
Target XClient.exe
SHA256 daafb00382eccadaf2f91f5cdf9495db9f3c7245aebe3905bb4637909c58a2e0
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

daafb00382eccadaf2f91f5cdf9495db9f3c7245aebe3905bb4637909c58a2e0

Threat Level: Known bad

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

Malicious Activity Summary

xworm execution rat trojan

Xworm

Detect Xworm Payload

Xworm family

Command and Scripting Interpreter: PowerShell

Executes dropped EXE

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 WriteProcessMemory

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

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 04:58

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 04:58

Reported

2024-06-15 04:59

Platform

win11-20240611-en

Max time kernel

33s

Max time network

32s

Command Line

"C:\Users\Admin\AppData\Local\Temp\XClient.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

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\rundll64.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\XClient.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.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\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\rundll64.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1572 wrote to memory of 3444 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 3444 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 2264 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 2264 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 4544 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 4544 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 2376 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 2376 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1572 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\schtasks.exe
PID 1572 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\XClient.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\XClient.exe'

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

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

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

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

C:\ProgramData\rundll64.exe

C:\ProgramData\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 104.20.4.235:443 pastebin.com tcp
US 64.188.16.134:7861 tcp
US 64.188.16.134:7861 tcp

Files

memory/1572-0-0x00007FF92ECD3000-0x00007FF92ECD5000-memory.dmp

memory/1572-1-0x00000000003B0000-0x00000000003C2000-memory.dmp

memory/1572-2-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/3444-3-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/3444-4-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/3444-14-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/3444-13-0x00000221D6690000-0x00000221D66B2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kuks1rgu.ppk.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3444-15-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/3444-16-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/3444-19-0x00007FF92ECD0000-0x00007FF92F792000-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 1a9fa92a4f2e2ec9e244d43a6a4f8fb9
SHA1 9910190edfaccece1dfcc1d92e357772f5dae8f7
SHA256 0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888
SHA512 5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

MD5 f1ed0ca7585ba163098d9e724addbab2
SHA1 1bfbaa9b7e1d4211c65a421bc4a760d4eb72c196
SHA256 1ab4ae61b4737b190193187b1aeab9be32401753022b5e739023bea857edd9c7
SHA512 0738b9346203da57bd44a34c289e7b2013bb7e6de398cd8e859bbab6971e40ef0ff5b41a9c5a24ffb889564e730cc16b275272917841a61cb87790bbb69af573

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

MD5 235a07b025b2b08ad72a3334b8d3d31c
SHA1 db17747d857bb685c444c6dcb443cf776ba26510
SHA256 adffc75eb7bb7c89fd7d718c872d2e1f26a843f9696ca4025d9426ffd9f13ebf
SHA512 c8e2af527e9d32f2cab596e3f4beef531c75729c32537a5e1b5019e9cd9c8b179a3bc86a720f77d8c68a8702ae66e2e923e36feda5588cc44b2f09264beb8855

memory/1572-52-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

C:\ProgramData\rundll64.exe

MD5 1ea7fa570588a032058606fb7e020a3b
SHA1 e65850b6abc138b93a9810ae03d20ff3109a52cc
SHA256 daafb00382eccadaf2f91f5cdf9495db9f3c7245aebe3905bb4637909c58a2e0
SHA512 e952652c2385e39d670b68aa14be28a04687b1bf036af116be7310eb1af0e6a9bbc3990803f109d145e79c37d2f043d98b60f23b5affdd29555caae193fb5e95

memory/1572-56-0x000000001BD90000-0x000000001BD9C000-memory.dmp