xworm | e131f44ff3131bd01316cc0d99a0f36c3116adab6f0354ade58678a644c736bb

General

Target

AC 3.exe
Size

90KB
MD5

676fbfb0698d8105b708e7fc902ec3ff
SHA1

1077cc7de056b570a2e117880884fddd8dcd5023
SHA256

e131f44ff3131bd01316cc0d99a0f36c3116adab6f0354ade58678a644c736bb
SHA512

0e052dfb608231b39a072f38ac169d6efafaac48b21101af13f5b2ac3b341ee83f5d7a50a36a598f01e2220b4799f00167a897487bc9db68badf27479743a07c
SSDEEP

1536:z3W5cwWRxDRuqJLOR4hvIFw9bdX0fT2to3/03JzTN6msCOlMe+DE56:z97DYsYAvGw9bdS2c/05z+COlb+Dc6

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

artist-forum.gl.at.ply.gg:38847

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3004-0-0x00000000001F0000-0x000000000020C000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\XClient.exe	family_xworm
behavioral1/memory/2140-38-0x0000000000AB0000-0x0000000000ACC000-memory.dmp	family_xworm
behavioral1/memory/2256-40-0x0000000001370000-0x000000000138C000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

Processes:

AC 3.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	AC 3.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	AC 3.exe

Executes dropped EXE 2 IoCs

Processes:

XClient.exeXClient.exe

pid process

2140 XClient.exe
2256 XClient.exe

pid	process
2140	XClient.exe
2256	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

AC 3.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	AC 3.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.

Processes:

flow ioc

4 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2892 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeAC 3.exe

pid process

3008 powershell.exe
2492 powershell.exe
2472 powershell.exe
1748 powershell.exe
3004 AC 3.exe

flow	ioc
4	ip-api.com

pid	process
2892	schtasks.exe

pid	process
3008	powershell.exe
2492	powershell.exe
2472	powershell.exe
1748	powershell.exe
3004	AC 3.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

AC 3.exepowershell.exepowershell.exepowershell.exepowershell.exeXClient.exeXClient.exe

description	pid	process
Token: SeDebugPrivilege	3004	AC 3.exe
Token: SeDebugPrivilege	3008	powershell.exe
Token: SeDebugPrivilege	2492	powershell.exe
Token: SeDebugPrivilege	2472	powershell.exe
Token: SeDebugPrivilege	1748	powershell.exe
Token: SeDebugPrivilege	3004	AC 3.exe
Token: SeDebugPrivilege	2140	XClient.exe
Token: SeDebugPrivilege	2256	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

AC 3.exe

pid process

3004 AC 3.exe

pid	process
3004	AC 3.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

AC 3.exetaskeng.exe

description	pid	process	target process
PID 3004 wrote to memory of 3008	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 3008	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 3008	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 2492	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 2492	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 2492	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 2472	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 2472	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 2472	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 1748	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 1748	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 1748	3004	AC 3.exe	powershell.exe
PID 3004 wrote to memory of 2892	3004	AC 3.exe	schtasks.exe
PID 3004 wrote to memory of 2892	3004	AC 3.exe	schtasks.exe
PID 3004 wrote to memory of 2892	3004	AC 3.exe	schtasks.exe
PID 2528 wrote to memory of 2140	2528	taskeng.exe	XClient.exe
PID 2528 wrote to memory of 2140	2528	taskeng.exe	XClient.exe
PID 2528 wrote to memory of 2140	2528	taskeng.exe	XClient.exe
PID 2528 wrote to memory of 2256	2528	taskeng.exe	XClient.exe
PID 2528 wrote to memory of 2256	2528	taskeng.exe	XClient.exe
PID 2528 wrote to memory of 2256	2528	taskeng.exe	XClient.exe

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\AC 3.exe
"C:\Users\Admin\AppData\Local\Temp\AC 3.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:3004

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\AC 3.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3008

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'AC 3.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2492

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2472

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1748

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
2⤵
- Creates scheduled task(s)
PID:2892

C:\Windows\system32\taskeng.exe
taskeng.exe {F34F1688-CFA1-4689-8F2A-E5434EF8BE05} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2528

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2140

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2256

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
b5c3556baae8a9388f6dc7a44acdf4ae

SHA1
08c23d30e5718bb0eff6147cb198276fc79c0bed

SHA256
14b1c99cf23cb305aa49029b1d987daaca544a09b891a3a2eabb2d60f91c1806

SHA512
cc9b902784d62f01451ba8676cb642f9b8ed24a93bbe70ebcd76bc3ab69ba138149565107f1372090d46567f01ea772b4bf8b56534f413d145a8c3d8dc2b82cf

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe
Filesize
90KB

MD5
676fbfb0698d8105b708e7fc902ec3ff

SHA1
1077cc7de056b570a2e117880884fddd8dcd5023

SHA256
e131f44ff3131bd01316cc0d99a0f36c3116adab6f0354ade58678a644c736bb

SHA512
0e052dfb608231b39a072f38ac169d6efafaac48b21101af13f5b2ac3b341ee83f5d7a50a36a598f01e2220b4799f00167a897487bc9db68badf27479743a07c

Download Submit
memory/2140-38-0x0000000000AB0000-0x0000000000ACC000-memory.dmp

Filesize
112KB

Download
memory/2256-40-0x0000000001370000-0x000000000138C000-memory.dmp

Filesize
112KB

Download
memory/2492-16-0x0000000001C90000-0x0000000001C98000-memory.dmp

Filesize
32KB

Download
memory/2492-15-0x000000001B510000-0x000000001B7F2000-memory.dmp

Filesize
2.9MB

Download
memory/3004-31-0x000007FEF4E60000-0x000007FEF584C000-memory.dmp

Filesize
9.9MB

Download
memory/3004-0-0x00000000001F0000-0x000000000020C000-memory.dmp

Filesize
112KB

Download
memory/3004-32-0x0000000000220000-0x00000000002A0000-memory.dmp

Filesize
512KB

Download
memory/3004-33-0x00000000023D0000-0x00000000023DC000-memory.dmp

Filesize
48KB

Download
memory/3004-2-0x0000000000220000-0x00000000002A0000-memory.dmp

Filesize
512KB

Download
memory/3004-1-0x000007FEF4E60000-0x000007FEF584C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-9-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/3008-8-0x000000001B6B0000-0x000000001B992000-memory.dmp

Filesize
2.9MB

Download
memory/3008-7-0x0000000002B50000-0x0000000002BD0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads