xworm | 13998cf5ce3fc1b1fb20635ef2c1e476c880d72eec7afb7e8ec74808928700da

Analysis

max time kernel
135s
max time network
154s
platform
windows7_x64
resource
win7-20250207-en
resource tags

arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:15

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General

Target

a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe
Size

211KB
MD5

1f0395936dc0d6537bccdb76d7f69e2f
SHA1

fe932a4a7d78d9c184e31205c3576d288be69272
SHA256

a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad
SHA512

4e4a87a1a753b80ab5471768f198446e77cf16a89485e0e9da50d907bf1468a2f5a2b7082cf6024f8b9e3381f15ba796019a56f379293ba90b6415591349119a
SSDEEP

3072:9O9PzMMAdkVkgNe+bGtq4QXSfOW3ty83hLKKKKKU8AAFTbp8ELQHsoOJNuYnZIWV:9OUIkiHbwqS9yLfJXnIZR

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

192.168.100.13:7000

Attributes

Install_directory
%AppData%
install_file
RuntimeBroker.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral5/memory/2648-1-0x0000000001230000-0x000000000126A000-memory.dmp	family_xworm
behavioral5/memory/2300-11-0x0000000000CD0000-0x0000000000D0A000-memory.dmp	family_xworm
behavioral5/files/0x00060000000120e8-10.dat	family_xworm
behavioral5/memory/796-15-0x0000000000D60000-0x0000000000D9A000-memory.dmp	family_xworm
behavioral5/memory/2364-17-0x00000000010A0000-0x00000000010DA000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RuntimeBroker.lnk	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RuntimeBroker.lnk	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe

Executes dropped EXE 3 IoCs

pid	Process
2300	RuntimeBroker.exe
796	RuntimeBroker.exe
2364	RuntimeBroker.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-677481364-2238709445-1347953534-1000\Software\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "C:\\Users\\Admin\\AppData\\Roaming\\RuntimeBroker.exe"	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe

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

pid	Process
2452	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2648	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe
Token: SeDebugPrivilege	2648	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe
Token: SeDebugPrivilege	2300	RuntimeBroker.exe
Token: SeDebugPrivilege	796	RuntimeBroker.exe
Token: SeDebugPrivilege	2364	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2648	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2452	2648	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe	31
PID 2648 wrote to memory of 2452	2648	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe	31
PID 2648 wrote to memory of 2452	2648	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe	31
PID 2016 wrote to memory of 2300	2016	taskeng.exe	34
PID 2016 wrote to memory of 2300	2016	taskeng.exe	34
PID 2016 wrote to memory of 2300	2016	taskeng.exe	34
PID 2016 wrote to memory of 796	2016	taskeng.exe	35
PID 2016 wrote to memory of 796	2016	taskeng.exe	35
PID 2016 wrote to memory of 796	2016	taskeng.exe	35
PID 2016 wrote to memory of 2364	2016	taskeng.exe	37
PID 2016 wrote to memory of 2364	2016	taskeng.exe	37
PID 2016 wrote to memory of 2364	2016	taskeng.exe	37

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\a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe
"C:\Users\Admin\AppData\Local\Temp\a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2452

C:\Windows\system32\taskeng.exe
taskeng.exe {FD06DD42-AAF9-49FD-BD01-E5F6D1554CA4} S-1-5-21-677481364-2238709445-1347953534-1000:JXXXDSWS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
  C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2300
- C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
  C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:796
- C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
  C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2364

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe

Filesize
211KB

MD5
1f0395936dc0d6537bccdb76d7f69e2f

SHA1
fe932a4a7d78d9c184e31205c3576d288be69272

SHA256
a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad

SHA512
4e4a87a1a753b80ab5471768f198446e77cf16a89485e0e9da50d907bf1468a2f5a2b7082cf6024f8b9e3381f15ba796019a56f379293ba90b6415591349119a

Download Submit
memory/796-15-0x0000000000D60000-0x0000000000D9A000-memory.dmp

Filesize
232KB

Download
memory/2300-11-0x0000000000CD0000-0x0000000000D0A000-memory.dmp

Filesize
232KB

Download
memory/2364-17-0x00000000010A0000-0x00000000010DA000-memory.dmp

Filesize
232KB

Download
memory/2648-0-0x000007FEF5D93000-0x000007FEF5D94000-memory.dmp

Filesize
4KB

Download
memory/2648-1-0x0000000001230000-0x000000000126A000-memory.dmp

Filesize
232KB

Download
memory/2648-6-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/2648-7-0x000007FEF5D93000-0x000007FEF5D94000-memory.dmp

Filesize
4KB

Download
memory/2648-12-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download