xworm | b9254a6ecd096658f98b82ebb751201b4e447b5ce3b7302b48fb228c9b516c23

General

Target

Registry.exe
Size

77KB
MD5

9d6650618c58c87940342a370a32e509
SHA1

c579fae20e78573deeec2059c8119083ccdff7e2
SHA256

b9254a6ecd096658f98b82ebb751201b4e447b5ce3b7302b48fb228c9b516c23
SHA512

d37b31b2c9669980279e2ebf247811ddd2f43231766a735b8a904dd9de1034e10a5fb7ee23c80717f88d5e173b0ee84ee890b95f50e71590b57e03d8b81d6020
SSDEEP

1536:BQa31Z6Y6BFzJufgQIUbmVCcGDl4gBQOV8EaKiRE:BQZhB5IYTUbm1Yl4SQOV8EqE

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.20:49485

Attributes

Install_directory
%Userprofile%
install_file
System.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1756-1-0x0000000000420000-0x000000000043A000-memory.dmp	family_xworm
behavioral1/files/0x000900000001aa66-6.dat	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 5 IoCs

pid	Process
1940	System
3232	System
4736	System
3144	System
3136	System

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-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Admin\\System"	Registry.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
3	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
3084	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1756	Registry.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1756	Registry.exe
Token: SeDebugPrivilege	1756	Registry.exe
Token: SeDebugPrivilege	1940	System
Token: SeDebugPrivilege	3232	System
Token: SeDebugPrivilege	4736	System
Token: SeDebugPrivilege	3144	System
Token: SeDebugPrivilege	3136	System

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1756	Registry.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1756 wrote to memory of 3084	1756	Registry.exe	71
PID 1756 wrote to memory of 3084	1756	Registry.exe	71

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\Registry.exe
"C:\Users\Admin\AppData\Local\Temp\Registry.exe"
1⤵
- 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:1756
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System" /tr "C:\Users\Admin\System"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3084

C:\Users\Admin\System
C:\Users\Admin\System
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1940

C:\Users\Admin\System
C:\Users\Admin\System
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3232

C:\Users\Admin\System
C:\Users\Admin\System
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4736

C:\Users\Admin\System
C:\Users\Admin\System
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3144

C:\Users\Admin\System
C:\Users\Admin\System
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3136

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
16c5fce5f7230eea11598ec11ed42862

SHA1
75392d4824706090f5e8907eee1059349c927600

SHA256
87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151

SHA512
153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

Download Submit
C:\Users\Admin\System

Filesize
77KB

MD5
9d6650618c58c87940342a370a32e509

SHA1
c579fae20e78573deeec2059c8119083ccdff7e2

SHA256
b9254a6ecd096658f98b82ebb751201b4e447b5ce3b7302b48fb228c9b516c23

SHA512
d37b31b2c9669980279e2ebf247811ddd2f43231766a735b8a904dd9de1034e10a5fb7ee23c80717f88d5e173b0ee84ee890b95f50e71590b57e03d8b81d6020

Download Submit
memory/1756-0-0x00007FF8EE9D3000-0x00007FF8EE9D4000-memory.dmp

Filesize
4KB

Download
memory/1756-1-0x0000000000420000-0x000000000043A000-memory.dmp

Filesize
104KB

Download
memory/1756-2-0x00007FF8EE9D0000-0x00007FF8EF3BC000-memory.dmp

Filesize
9.9MB

Download
memory/1756-9-0x00007FF8EE9D3000-0x00007FF8EE9D4000-memory.dmp

Filesize
4KB

Download
memory/1756-12-0x00007FF8EE9D0000-0x00007FF8EF3BC000-memory.dmp

Filesize
9.9MB

Download
memory/1940-8-0x00007FF8EE9D0000-0x00007FF8EF3BC000-memory.dmp

Filesize
9.9MB

Download
memory/1940-11-0x00007FF8EE9D0000-0x00007FF8EF3BC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads