xworm | 13998cf5ce3fc1b1fb20635ef2c1e476c880d72eec7afb7e8ec74808928700da

Analysis

max time kernel
142s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-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 2 IoCs

resource	yara_rule
behavioral6/memory/6004-1-0x0000000000180000-0x00000000001BA000-memory.dmp	family_xworm
behavioral6/files/0x000b00000002418b-11.dat	family_xworm

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe

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 2 IoCs

pid	Process
2304	RuntimeBroker.exe
3724	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-1-5-21-3975168204-1612096350-4002976354-1000\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
440	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
6004	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	6004	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe
Token: SeDebugPrivilege	6004	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe
Token: SeDebugPrivilege	2304	RuntimeBroker.exe
Token: SeDebugPrivilege	3724	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
6004	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 6004 wrote to memory of 440	6004	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe	91
PID 6004 wrote to memory of 440	6004	a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad.exe	91

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⤵
- Checks computer location settings
- 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:6004
- 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:440

C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2304

C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3724

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\Local\Microsoft\CLR_v4.0\UsageLogs\RuntimeBroker.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
211KB

MD5
1f0395936dc0d6537bccdb76d7f69e2f

SHA1
fe932a4a7d78d9c184e31205c3576d288be69272

SHA256
a72cdbd8e2e58d49bac3da8f517b97ee8262cc6d54e21eadfacbf1df504a26ad

SHA512
4e4a87a1a753b80ab5471768f198446e77cf16a89485e0e9da50d907bf1468a2f5a2b7082cf6024f8b9e3381f15ba796019a56f379293ba90b6415591349119a

Download Submit
memory/2304-12-0x00007FF90A090000-0x00007FF90AB51000-memory.dmp

Filesize
10.8MB

Download
memory/2304-14-0x00007FF90A090000-0x00007FF90AB51000-memory.dmp

Filesize
10.8MB

Download
memory/6004-0-0x00007FF90A093000-0x00007FF90A095000-memory.dmp

Filesize
8KB

Download
memory/6004-1-0x0000000000180000-0x00000000001BA000-memory.dmp

Filesize
232KB

Download
memory/6004-6-0x00007FF90A090000-0x00007FF90AB51000-memory.dmp

Filesize
10.8MB

Download
memory/6004-7-0x00007FF90A093000-0x00007FF90A095000-memory.dmp

Filesize
8KB

Download
memory/6004-8-0x00007FF90A090000-0x00007FF90AB51000-memory.dmp

Filesize
10.8MB

Download