xworm | 27110993bd53e38b26312d13c98b00b8b8e6447fb2726487638623e7214370ee

General

Target

XClient.exe
Size

35KB
MD5

9a2caad126990a0f16658a2ff1646157
SHA1

5d851c31aad1f79c3ebcdfd5e0293b402c2a48cb
SHA256

27110993bd53e38b26312d13c98b00b8b8e6447fb2726487638623e7214370ee
SHA512

514045535434ff6f9cad8451c6e0dd16c1a09fce14b58312633d8030d672863d2d448bae5a0b17074010105b25bf07fe7b975bf266dc76ce74aaab95a916adde
SSDEEP

768:9DMfF7zLKYs2Byj5MuddqLa9Fk9wEO/h0/q2z:9kF7HKYs/1hdtFk9wEO/6C2z

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

ensure-manual.gl.at.ply.gg:9321

Mutex

wwFuwDiBzpVl21Sl

Attributes

Install_directory
%AppData%
install_file
dllhost.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4760-1-0x0000000000D00000-0x0000000000D10000-memory.dmp	family_xworm
behavioral1/files/0x0028000000045058-9.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-1-5-21-584106483-899802418-1877852863-1000\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\dllhost.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dllhost.lnk	XClient.exe

Executes dropped EXE 3 IoCs

pid	Process
3220	dllhost.exe
740	dllhost.exe
980	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-1-5-21-584106483-899802418-1877852863-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "C:\\Users\\Admin\\AppData\\Roaming\\dllhost.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
1476	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	XClient.exe
Token: SeDebugPrivilege	3220	dllhost.exe
Token: SeDebugPrivilege	740	dllhost.exe
Token: SeDebugPrivilege	980	dllhost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4760 wrote to memory of 1476	4760	XClient.exe	87
PID 4760 wrote to memory of 1476	4760	XClient.exe	87

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
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4760
- 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:1476

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3220

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:740

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:980

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\dllhost.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
35KB

MD5
9a2caad126990a0f16658a2ff1646157

SHA1
5d851c31aad1f79c3ebcdfd5e0293b402c2a48cb

SHA256
27110993bd53e38b26312d13c98b00b8b8e6447fb2726487638623e7214370ee

SHA512
514045535434ff6f9cad8451c6e0dd16c1a09fce14b58312633d8030d672863d2d448bae5a0b17074010105b25bf07fe7b975bf266dc76ce74aaab95a916adde

Download Submit
memory/3220-11-0x00007FFEE45B0000-0x00007FFEE5072000-memory.dmp

Filesize
10.8MB

Download
memory/3220-13-0x00007FFEE45B0000-0x00007FFEE5072000-memory.dmp

Filesize
10.8MB

Download
memory/4760-0-0x00007FFEE45B3000-0x00007FFEE45B5000-memory.dmp

Filesize
8KB

Download
memory/4760-1-0x0000000000D00000-0x0000000000D10000-memory.dmp

Filesize
64KB

Download
memory/4760-6-0x00007FFEE45B0000-0x00007FFEE5072000-memory.dmp

Filesize
10.8MB

Download
memory/4760-7-0x00007FFEE45B3000-0x00007FFEE45B5000-memory.dmp

Filesize
8KB

Download
memory/4760-8-0x00007FFEE45B0000-0x00007FFEE5072000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads