xworm | 6cb26daf0ab888c6507fe5004eeb06ca66605664b2bda40179030e5e5d0e483a

General

Target

XWorm.exe
Size

41KB
MD5

757b77639d03590aa5d1cf21d08bc27e
SHA1

5b74577f9e5dbb7d4164de5f539381b1258f815f
SHA256

6cb26daf0ab888c6507fe5004eeb06ca66605664b2bda40179030e5e5d0e483a
SHA512

65d2ad77a11344127cbdd46f3e42812fd73b4e5c8e4084f1be40027326dca37294a1e82988b436c6c3d30ee4e004ec7c18710e4cd4eeea413b661700283351fe
SSDEEP

768:go8PvgoKrwdlS/shShk9lYAT9GKdQ9jGxZIRRTO:gdjMwdl3SGYKpQ9yg/TO

Score

10^/10

xworm discovery persistence rat trojan upx

Malware Config

Extracted

Family

xworm

C2

any-attraction.gl.at.ply.gg:27770

Mutex

8RhEzW61BTZ3YwGr

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1616-1-0x0000000000CF0000-0x0000000000D00000-memory.dmp	family_xworm
behavioral2/files/0x000300000001e64a-6.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-1-5-21-1161330783-2912525651-1278508834-1000\Control Panel\International\Geo\Nation	XWorm.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XWorm.exe	XWorm.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XWorm.exe	XWorm.exe

Executes dropped EXE 4 IoCs

pid	Process
4868	XWorm.exe
5300	ngrok.exe
4812	XWorm.exe
2008	XWorm.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-1-5-21-1161330783-2912525651-1278508834-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XWorm = "C:\\Users\\Admin\\AppData\\Roaming\\XWorm.exe"	XWorm.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x0004000000022b5e-19.dat	upx
behavioral2/memory/5300-25-0x0000000000F50000-0x0000000002A19000-memory.dmp	upx
behavioral2/memory/5300-27-0x0000000000F50000-0x0000000002A19000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ngrok.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
5080	taskkill.exe

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
3720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5300	ngrok.exe
5300	ngrok.exe
5300	ngrok.exe
5300	ngrok.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5080	taskkill.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1616 wrote to memory of 3720	1616	XWorm.exe	87
PID 1616 wrote to memory of 3720	1616	XWorm.exe	87
PID 1616 wrote to memory of 5080	1616	XWorm.exe	107
PID 1616 wrote to memory of 5080	1616	XWorm.exe	107
PID 1616 wrote to memory of 5300	1616	XWorm.exe	109
PID 1616 wrote to memory of 5300	1616	XWorm.exe	109
PID 1616 wrote to memory of 5300	1616	XWorm.exe	109

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\XWorm.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 1 /tn "XWorm" /tr "C:\Users\Admin\AppData\Roaming\XWorm.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3720
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill.exe /im ngrok.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:5080
- C:\Users\Admin\AppData\Local\Temp\ngrok.exe
  C:\Users\Admin\AppData\Local\Temp\ngrok.exe authtoken Your_Authtoken
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:5300

C:\Users\Admin\AppData\Roaming\XWorm.exe
C:\Users\Admin\AppData\Roaming\XWorm.exe
1⤵
- Executes dropped EXE
PID:4868

C:\Users\Admin\AppData\Roaming\XWorm.exe
C:\Users\Admin\AppData\Roaming\XWorm.exe
1⤵
- Executes dropped EXE
PID:4812

C:\Users\Admin\AppData\Roaming\XWorm.exe
C:\Users\Admin\AppData\Roaming\XWorm.exe
1⤵
- Executes dropped EXE
PID:2008

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
a8a147915e3a996fdbe10b3a3f1e1bb2

SHA1
abc564c1be468d57e700913e7b6cf8f62d421263

SHA256
8b96a8557deea66696837af011843d6a82451ba57c8f9b5a2726a70818d6fc7e

SHA512
17b42f17ef60a9f625703172763f692e5ed2ca93564a97853dfa72bb0ac6305ef3267aea0b205938e3aa8eac10156d9d4f322b30d0329d92d647bcec6372731c

Download Submit
C:\Users\Admin\AppData\Local\Temp\ngrok.exe

Filesize
12.2MB

MD5
ace44294213ca5ad0a4ae2eb3c786509

SHA1
8d208075dc5d00af7ead68ae7bd569b50ecdae01

SHA256
b41502b3e3fbd5d2617fac2c6a136515eea2525f2b0530d62c5797c80c0c1e02

SHA512
62c4bc3f0a7a958131f993b174b91c26c23d75c102e8d2c34d20c84fc7fbb2aca2d71bc0b78dc226eb6143cb3e1a8111c712b028b185c7e888b1278e55557f0b

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

Filesize
41KB

MD5
757b77639d03590aa5d1cf21d08bc27e

SHA1
5b74577f9e5dbb7d4164de5f539381b1258f815f

SHA256
6cb26daf0ab888c6507fe5004eeb06ca66605664b2bda40179030e5e5d0e483a

SHA512
65d2ad77a11344127cbdd46f3e42812fd73b4e5c8e4084f1be40027326dca37294a1e82988b436c6c3d30ee4e004ec7c18710e4cd4eeea413b661700283351fe

Download Submit
memory/1616-0-0x00007FFBA1EA3000-0x00007FFBA1EA5000-memory.dmp

Filesize
8KB

Download
memory/1616-11-0x00007FFBA1EA3000-0x00007FFBA1EA5000-memory.dmp

Filesize
8KB

Download
memory/1616-12-0x00007FFBA1EA0000-0x00007FFBA2961000-memory.dmp

Filesize
10.8MB

Download
memory/1616-13-0x0000000025130000-0x0000000025D88000-memory.dmp

Filesize
12.3MB

Download
memory/1616-5-0x00007FFBA1EA0000-0x00007FFBA2961000-memory.dmp

Filesize
10.8MB

Download
memory/1616-1-0x0000000000CF0000-0x0000000000D00000-memory.dmp

Filesize
64KB

Download
memory/4868-8-0x00007FFBA1EA0000-0x00007FFBA2961000-memory.dmp

Filesize
10.8MB

Download
memory/4868-10-0x00007FFBA1EA0000-0x00007FFBA2961000-memory.dmp

Filesize
10.8MB

Download
memory/5300-25-0x0000000000F50000-0x0000000002A19000-memory.dmp

Filesize
26.8MB

Download
memory/5300-27-0x0000000000F50000-0x0000000002A19000-memory.dmp

Filesize
26.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads