xworm | 160104171f76a625bac4aabf4fa99bc7a6c1c145786ff5bb98a949e40053fdeb

General

Target

Versal Client Beta.exe
Size

68KB
MD5

3e7d64259b363be8f8d3ad5ce94943f4
SHA1

7e2fa2fb30069c3a7ce3f523440497d30ff6164f
SHA256

992fa7f194c76a9e6155a13ef849ae3fe55c3bd7954d3a08cff1719fdd16ae1b
SHA512

cadd51b55ad4ee21ed3c21bc462d034122fb5068c5bd8b82e61f2019c72d70c01f7c3892c916da6b89c39ba73ff9e65e6f52115fac3abc929796194008f0fca4
SSDEEP

1536:SDhdopFOmcMwSlUHbHzMiwO7EsxNbqFDAkIhQ+pnOhZ46+2dTR1:7OMjYbYiwv6NbqDXQnOPx+Y1

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

slipprz.duckdns.org:7214

Attributes

Install_directory
%LocalAppData%
install_file
win32services.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3220-1-0x00000000007D0000-0x00000000007E8000-memory.dmp	family_xworm
behavioral2/files/0x0007000000023cc5-10.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	Versal Client Beta.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\win32services.lnk	Versal Client Beta.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\win32services.lnk	Versal Client Beta.exe

Executes dropped EXE 2 IoCs

pid	Process
3664	win32services.exe
3056	win32services.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\win32services = "C:\\Users\\Admin\\AppData\\Local\\win32services.exe"	Versal Client Beta.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
22	ip-api.com

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
4744	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3220	Versal Client Beta.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3220	Versal Client Beta.exe
Token: SeDebugPrivilege	3220	Versal Client Beta.exe
Token: SeDebugPrivilege	3664	win32services.exe
Token: SeDebugPrivilege	3056	win32services.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3220	Versal Client Beta.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3220 wrote to memory of 4744	3220	Versal Client Beta.exe	89
PID 3220 wrote to memory of 4744	3220	Versal Client Beta.exe	89

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\Versal Client Beta.exe
"C:\Users\Admin\AppData\Local\Temp\Versal Client Beta.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:3220
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "win32services" /tr "C:\Users\Admin\AppData\Local\win32services.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4744

C:\Users\Admin\AppData\Local\win32services.exe
C:\Users\Admin\AppData\Local\win32services.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3664

C:\Users\Admin\AppData\Local\win32services.exe
C:\Users\Admin\AppData\Local\win32services.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3056

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\win32services.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\win32services.exe

Filesize
68KB

MD5
3e7d64259b363be8f8d3ad5ce94943f4

SHA1
7e2fa2fb30069c3a7ce3f523440497d30ff6164f

SHA256
992fa7f194c76a9e6155a13ef849ae3fe55c3bd7954d3a08cff1719fdd16ae1b

SHA512
cadd51b55ad4ee21ed3c21bc462d034122fb5068c5bd8b82e61f2019c72d70c01f7c3892c916da6b89c39ba73ff9e65e6f52115fac3abc929796194008f0fca4

Download Submit
memory/3220-0-0x00007FF8CFC13000-0x00007FF8CFC15000-memory.dmp

Filesize
8KB

Download
memory/3220-1-0x00000000007D0000-0x00000000007E8000-memory.dmp

Filesize
96KB

Download
memory/3220-2-0x00007FF8CFC13000-0x00007FF8CFC15000-memory.dmp

Filesize
8KB

Download
memory/3220-3-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download
memory/3220-8-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-12-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-13-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-15-0x00007FF8CFC10000-0x00007FF8D06D1000-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