xworm | 407c8bca5d8860243c432477063fd131e5ac5f262df2ee3f95ea995eaca3d584

Analysis

max time kernel
146s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
30-06-2024 20:49

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General

Target

XClient.exe
Size

38KB
MD5

580476bf6d98b53ca3897d3e1ddb7395
SHA1

4228dd985cac40c46b5e78e0b1db4d2b432768cc
SHA256

407c8bca5d8860243c432477063fd131e5ac5f262df2ee3f95ea995eaca3d584
SHA512

7ba29b6dfddac9bf3945a8b02c30d25a38e88f608f479f7d8b4cd3fb59e05d3464d3b8aa754add793bf21c42dca4b35bb707f1f073e2894e20c8d15570b1720d
SSDEEP

768:L7kigiROpS93paGFyw9/lI6rO/htjPNsb:L9Z/lpFr99I6rO/Pab

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

NgM4ZY0RAWPip3iP

Attributes

Install_directory
%AppData%
install_file
ReAgentC.exe
pastebin_url
https://pastebin.com/raw/UWpQULMP

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource yara_rule

behavioral1/memory/2148-0-0x0000000000320000-0x0000000000330000-memory.dmp family_xworm
C:\Users\Admin\AppData\Roaming\ReAgentC.exe family_xworm
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

1468 powershell.exe
2448 powershell.exe
5064 powershell.exe
4712 powershell.exe

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000320000-0x0000000000330000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\ReAgentC.exe	family_xworm

pid	process
1468	powershell.exe
2448	powershell.exe
5064	powershell.exe
4712	powershell.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ReAgentC.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ReAgentC.lnk	XClient.exe

Executes dropped EXE 2 IoCs

Processes:

ReAgentC.exeReAgentC.exe

pid process

4912 ReAgentC.exe
4984 ReAgentC.exe

pid	process
4912	ReAgentC.exe
4984	ReAgentC.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\ReAgentC = "C:\\Users\\Admin\\AppData\\Roaming\\ReAgentC.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 9 IoCs

Web Service
T1102

Processes:

flow ioc

5 pastebin.com
9 pastebin.com
14 pastebin.com
11 pastebin.com
12 pastebin.com
13 pastebin.com
15 pastebin.com
16 pastebin.com
17 pastebin.com
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

1 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

2296 schtasks.exe
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

1468 powershell.exe
1468 powershell.exe
2448 powershell.exe
2448 powershell.exe
5064 powershell.exe
5064 powershell.exe
4712 powershell.exe
4712 powershell.exe

flow	ioc
5	pastebin.com
9	pastebin.com
14	pastebin.com
11	pastebin.com
12	pastebin.com
13	pastebin.com
15	pastebin.com
16	pastebin.com
17	pastebin.com

flow	ioc
1	ip-api.com

pid	process
2296	schtasks.exe

pid	process
1468	powershell.exe
1468	powershell.exe
2448	powershell.exe
2448	powershell.exe
5064	powershell.exe
5064	powershell.exe
4712	powershell.exe
4712	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exeReAgentC.exeReAgentC.exe

description	pid	process
Token: SeDebugPrivilege	2148	XClient.exe
Token: SeDebugPrivilege	1468	powershell.exe
Token: SeDebugPrivilege	2448	powershell.exe
Token: SeDebugPrivilege	5064	powershell.exe
Token: SeDebugPrivilege	4712	powershell.exe
Token: SeDebugPrivilege	4912	ReAgentC.exe
Token: SeDebugPrivilege	4984	ReAgentC.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 2148 wrote to memory of 1468	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 1468	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 2448	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 2448	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 5064	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 5064	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 4712	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 4712	2148	XClient.exe	powershell.exe
PID 2148 wrote to memory of 2296	2148	XClient.exe	schtasks.exe
PID 2148 wrote to memory of 2296	2148	XClient.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2148

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'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1468

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2448

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\Roaming\ReAgentC.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5064

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'ReAgentC.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4712

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "ReAgentC" /tr "C:\Users\Admin\AppData\Roaming\ReAgentC.exe"
2⤵
- Scheduled Task/Job: Scheduled Task
PID:2296

C:\Users\Admin\AppData\Roaming\ReAgentC.exe
C:\Users\Admin\AppData\Roaming\ReAgentC.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4912

C:\Users\Admin\AppData\Roaming\ReAgentC.exe
C:\Users\Admin\AppData\Roaming\ReAgentC.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4984

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\ReAgentC.exe.log
Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
050567a067ffea4eb40fe2eefebdc1ee

SHA1
6e1fb2c7a7976e0724c532449e97722787a00fec

SHA256
3952d5b543e5cb0cb84014f4ad9f5f1b7166f592d28640cbc3d914d0e6f41d2e

SHA512
341ad71ef7e850b10e229666312e4bca87a0ed9fe25ba4b0ab65661d5a0efa855db0592153106da07134d8fc2c6c0e44709bf38183c9a574a1fa543189971259

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
e07eea85a8893f23fb814cf4b3ed974c

SHA1
8a8125b2890bbddbfc3531d0ee4393dbbf5936fe

SHA256
83387ce468d717a7b4ba238af2273da873b731a13cc35604f775a31fa0ac70ea

SHA512
9d4808d8a261005391388b85da79e4c5396bdded6e7e5ce3a3a23e7359d1aa1fb983b4324f97e0afec6e8ed9d898322ca258dd7cda654456dd7e84c9cbd509df

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qj2omx1q.wcu.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\ReAgentC.exe
Filesize
38KB

MD5
580476bf6d98b53ca3897d3e1ddb7395

SHA1
4228dd985cac40c46b5e78e0b1db4d2b432768cc

SHA256
407c8bca5d8860243c432477063fd131e5ac5f262df2ee3f95ea995eaca3d584

SHA512
7ba29b6dfddac9bf3945a8b02c30d25a38e88f608f479f7d8b4cd3fb59e05d3464d3b8aa754add793bf21c42dca4b35bb707f1f073e2894e20c8d15570b1720d

Download Submit
memory/1468-11-0x0000023859020000-0x0000023859042000-memory.dmp

Filesize
136KB

Download
memory/1468-17-0x00007FFD97EF0000-0x00007FFD989B2000-memory.dmp

Filesize
10.8MB

Download
memory/1468-16-0x00007FFD97EF0000-0x00007FFD989B2000-memory.dmp

Filesize
10.8MB

Download
memory/1468-13-0x00007FFD97EF0000-0x00007FFD989B2000-memory.dmp

Filesize
10.8MB

Download
memory/1468-12-0x00007FFD97EF0000-0x00007FFD989B2000-memory.dmp

Filesize
10.8MB

Download
memory/2148-0-0x0000000000320000-0x0000000000330000-memory.dmp

Filesize
64KB

Download
memory/2148-53-0x00007FFD97EF0000-0x00007FFD989B2000-memory.dmp

Filesize
10.8MB

Download
memory/2148-2-0x00007FFD97EF0000-0x00007FFD989B2000-memory.dmp

Filesize
10.8MB

Download
memory/2148-1-0x00007FFD97EF3000-0x00007FFD97EF5000-memory.dmp

Filesize
8KB

Download