xworm | 653dda55a4c53f5e20d427cdcc0aa7c484d30b7e0797d3cfc73e8a6b786694af

Resubmissions

21-05-2024 11:37

240521-nrfqaacb93 10

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 11:37

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General

Target

XClient.exe
Size

51KB
MD5

c3d51775fdc985a9a6168da2df484e53
SHA1

2a8c36d89a433a14e7f2b726083e7c74965511fc
SHA256

653dda55a4c53f5e20d427cdcc0aa7c484d30b7e0797d3cfc73e8a6b786694af
SHA512

5b738c3b733a6e328fe26c170ff01bd81e6f1eeb7ffd367dc53027dbca9947d5d356951589168579c739970cf4d2d859db28d890e084ac3f42f982972180f851
SSDEEP

768:pFFI/kN2DoHAs4/tLfmjC2fgo0ZbWgzbnXalm1OWONuzh0943gd:HF3N2PdfmO2fg1zbnXaYrONOE4Qd

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

values-painted.gl.at.ply.gg:12784

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4496-1-0x0000000000BD0000-0x0000000000BE4000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\XClient.exe	family_xworm

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

Processes:

XClient.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation XClient.exe
Executes dropped EXE 3 IoCs

Processes:

XClient.exeXClient.exeXClient.exe

pid process

2052 XClient.exe
4932 XClient.exe
880 XClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	XClient.exe

pid	process
2052	XClient.exe
4932	XClient.exe
880	XClient.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-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

740 schtasks.exe

pid	process
740	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

XClient.exeXClient.exeXClient.exeXClient.exe

description	pid	process
Token: SeDebugPrivilege	4496	XClient.exe
Token: SeDebugPrivilege	2052	XClient.exe
Token: SeDebugPrivilege	4932	XClient.exe
Token: SeDebugPrivilege	880	XClient.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 4496 wrote to memory of 740	4496	XClient.exe	schtasks.exe
PID 4496 wrote to memory of 740	4496	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⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4496

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
2⤵
- Creates scheduled task(s)
PID:740

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2052

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4932

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:880

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

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

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe
Filesize
51KB

MD5
c3d51775fdc985a9a6168da2df484e53

SHA1
2a8c36d89a433a14e7f2b726083e7c74965511fc

SHA256
653dda55a4c53f5e20d427cdcc0aa7c484d30b7e0797d3cfc73e8a6b786694af

SHA512
5b738c3b733a6e328fe26c170ff01bd81e6f1eeb7ffd367dc53027dbca9947d5d356951589168579c739970cf4d2d859db28d890e084ac3f42f982972180f851

Download Submit
memory/2052-8-0x00007FFF45B00000-0x00007FFF465C1000-memory.dmp

Filesize
10.8MB

Download
memory/2052-10-0x00007FFF45B00000-0x00007FFF465C1000-memory.dmp

Filesize
10.8MB

Download
memory/4496-1-0x0000000000BD0000-0x0000000000BE4000-memory.dmp

Filesize
80KB

Download
memory/4496-0-0x00007FFF45B03000-0x00007FFF45B05000-memory.dmp

Filesize
8KB

Download
memory/4496-5-0x00007FFF45B00000-0x00007FFF465C1000-memory.dmp

Filesize
10.8MB

Download
memory/4496-11-0x00007FFF45B00000-0x00007FFF465C1000-memory.dmp

Filesize
10.8MB

Download