xworm | a2cc98c332e44b73a8737a390dfeaaa17b08adaec271ba6d64eb2bf4c8cc5d18

Analysis

max time kernel
33s
max time network
45s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
03-11-2024 12:21

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General

Target

dllhost.exe
Size

35KB
MD5

dfe1a183698d916bb80a2b3f5e16b146
SHA1

75d97ebebbf43679de5b14e4d3be23d22a09ba21
SHA256

a2cc98c332e44b73a8737a390dfeaaa17b08adaec271ba6d64eb2bf4c8cc5d18
SHA512

2e67e15d4ad7c0c233021770de96a3cf6c95a22bed89fd31f0a872266f34a4cb3d41872de61bd929964b63170a5db5663e778a96d045b2723edce648bb750970
SSDEEP

768:rDMfF7zLKYs2Byj5MuddqLa9Fk9wu/O/hr/q2O:rkF7HKYs/1hdtFk9wgO/dC2O

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

ensure-manual.gl.at.ply.gg:41199

Mutex

ZtTzf8WYbWwk3j1n

Attributes

Install_directory
%AppData%
install_file
dllhost.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/3712-1-0x0000000000820000-0x0000000000830000-memory.dmp	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-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	dllhost.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dllhost.lnk	dllhost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dllhost.lnk	dllhost.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-1-5-21-87863914-780023816-688321450-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "C:\\Users\\Admin\\AppData\\Roaming\\dllhost.exe"	dllhost.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
5084	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3712	dllhost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3712 wrote to memory of 5084	3712	dllhost.exe	86
PID 3712 wrote to memory of 5084	3712	dllhost.exe	86

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\dllhost.exe
"C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3712
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dllhost" /tr "C:\Users\Admin\AppData\Roaming\dllhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5084

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

memory/3712-0-0x00007FFBDD143000-0x00007FFBDD145000-memory.dmp

Filesize
8KB

Download
memory/3712-1-0x0000000000820000-0x0000000000830000-memory.dmp

Filesize
64KB

Download
memory/3712-6-0x00007FFBDD140000-0x00007FFBDDC02000-memory.dmp

Filesize
10.8MB

Download
memory/3712-7-0x00007FFBDD143000-0x00007FFBDD145000-memory.dmp

Filesize
8KB

Download
memory/3712-8-0x00007FFBDD140000-0x00007FFBDDC02000-memory.dmp

Filesize
10.8MB

Download
memory/3712-9-0x000000001B530000-0x000000001B53C000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads