xworm | 9618961af8c6db27588c649679634bec7ece8fabd3e48f02f33ac0b837b56d2e

Analysis

max time kernel
149s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
15-07-2024 16:14

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General

Target

zvgfd-main/XClient.exe
Size

44KB
MD5

d1b7f8c52ec77b5216e9d9481af3dfe6
SHA1

6c80d55a0b7b752522b97fdd4f295a034cb6f22c
SHA256

89a91963ffa6c8f651d919a026631fcc6bba96bb82d04d7721d6e3b8535d6532
SHA512

c776a5c6206593f6dc65d0f8aada968067a2d2551e38d4ae39521cf98f685ef3bbb6282859024865cb6b135740b397b363d90631ad514a3448579d28d98a19b4
SSDEEP

768:pMDF7zLXoeUHyLp0uddqLi9Fk9wIAO/hM/22ods4S1EAd8IIR:SF73XoeUS95d9Fk9wnO/uu2odS1EAd8R

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

75.24.104.157:7000

Mutex

o7sujR9sYt3NZzSf

Attributes

Install_directory
%Public%
install_file
$77-Update.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral24/memory/400-1-0x0000000000440000-0x0000000000452000-memory.dmp	family_xworm
behavioral24/files/0x0008000000023427-8.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-701583114-2636601053-947405450-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-Update.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-Update.lnk	XClient.exe

Executes dropped EXE 3 IoCs

pid	Process
4528	$77-Update.exe
4612	$77-Update.exe
632	$77-Update.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-1-5-21-701583114-2636601053-947405450-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-Update = "C:\\Users\\Public\\$77-Update.exe"	XClient.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
5020	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	400	XClient.exe
Token: SeDebugPrivilege	4528	$77-Update.exe
Token: SeDebugPrivilege	4612	$77-Update.exe
Token: SeDebugPrivilege	632	$77-Update.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 5020	400	XClient.exe	84
PID 400 wrote to memory of 5020	400	XClient.exe	84

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\zvgfd-main\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\zvgfd-main\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77-Update" /tr "C:\Users\Public\$77-Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5020

C:\Users\Public\$77-Update.exe
C:\Users\Public\$77-Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4528

C:\Users\Public\$77-Update.exe
C:\Users\Public\$77-Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4612

C:\Users\Public\$77-Update.exe
C:\Users\Public\$77-Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:632

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\$77-Update.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Public\$77-Update.exe

Filesize
44KB

MD5
d1b7f8c52ec77b5216e9d9481af3dfe6

SHA1
6c80d55a0b7b752522b97fdd4f295a034cb6f22c

SHA256
89a91963ffa6c8f651d919a026631fcc6bba96bb82d04d7721d6e3b8535d6532

SHA512
c776a5c6206593f6dc65d0f8aada968067a2d2551e38d4ae39521cf98f685ef3bbb6282859024865cb6b135740b397b363d90631ad514a3448579d28d98a19b4

Download Submit
memory/400-0-0x00007FFF67853000-0x00007FFF67855000-memory.dmp

Filesize
8KB

Download
memory/400-1-0x0000000000440000-0x0000000000452000-memory.dmp

Filesize
72KB

Download
memory/400-6-0x00007FFF67850000-0x00007FFF68311000-memory.dmp

Filesize
10.8MB

Download
memory/400-7-0x00007FFF67853000-0x00007FFF67855000-memory.dmp

Filesize
8KB

Download
memory/400-10-0x00007FFF67850000-0x00007FFF68311000-memory.dmp

Filesize
10.8MB

Download
memory/4528-11-0x00007FFF67850000-0x00007FFF68311000-memory.dmp

Filesize
10.8MB

Download
memory/4528-13-0x00007FFF67850000-0x00007FFF68311000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads