xworm | aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659

General

Target

vlz.exe
Size

335KB
MD5

1c3d5b401cebef06499718e000aa6c2b
SHA1

2f337e0fe1562aea14c4256afd47bce049e79f3c
SHA256

aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659
SHA512

f7d069f73b7b423123352ce100668608ae430151ceeddc0df542508b93ce7c4c3310bda4e8488888d9f425dfd26c0db4bd8070f0128697d23ffd44fdfdb42093
SSDEEP

6144:vWQLUqb9Bh+GIIIIIIIhIIIIIIIIIIIIIIIU:XLHBa

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

its-definitely.gl.at.ply.gg:32735

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/3060-1-0x0000000000370000-0x00000000003CA000-memory.dmp	family_xworm
behavioral1/files/0x0009000000012117-35.dat	family_xworm
behavioral1/memory/2524-37-0x0000000001150000-0x00000000011AA000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1336	powershell.exe
2720	powershell.exe
2880	powershell.exe
2152	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2524	XClient.exe
2284	XClient.exe
2356	XClient.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	vlz.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
4	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
1816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1336	powershell.exe
2720	powershell.exe
2880	powershell.exe
2152	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3060	vlz.exe
Token: SeDebugPrivilege	1336	powershell.exe
Token: SeDebugPrivilege	2720	powershell.exe
Token: SeDebugPrivilege	2880	powershell.exe
Token: SeDebugPrivilege	2152	powershell.exe
Token: SeDebugPrivilege	3060	vlz.exe
Token: SeDebugPrivilege	2524	XClient.exe
Token: SeDebugPrivilege	2284	XClient.exe
Token: SeDebugPrivilege	2356	XClient.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 1336	3060	vlz.exe	31
PID 3060 wrote to memory of 1336	3060	vlz.exe	31
PID 3060 wrote to memory of 1336	3060	vlz.exe	31
PID 3060 wrote to memory of 2720	3060	vlz.exe	33
PID 3060 wrote to memory of 2720	3060	vlz.exe	33
PID 3060 wrote to memory of 2720	3060	vlz.exe	33
PID 3060 wrote to memory of 2880	3060	vlz.exe	35
PID 3060 wrote to memory of 2880	3060	vlz.exe	35
PID 3060 wrote to memory of 2880	3060	vlz.exe	35
PID 3060 wrote to memory of 2152	3060	vlz.exe	37
PID 3060 wrote to memory of 2152	3060	vlz.exe	37
PID 3060 wrote to memory of 2152	3060	vlz.exe	37
PID 3060 wrote to memory of 1816	3060	vlz.exe	39
PID 3060 wrote to memory of 1816	3060	vlz.exe	39
PID 3060 wrote to memory of 1816	3060	vlz.exe	39
PID 480 wrote to memory of 2524	480	taskeng.exe	42
PID 480 wrote to memory of 2524	480	taskeng.exe	42
PID 480 wrote to memory of 2524	480	taskeng.exe	42
PID 480 wrote to memory of 2284	480	taskeng.exe	43
PID 480 wrote to memory of 2284	480	taskeng.exe	43
PID 480 wrote to memory of 2284	480	taskeng.exe	43
PID 480 wrote to memory of 2356	480	taskeng.exe	44
PID 480 wrote to memory of 2356	480	taskeng.exe	44
PID 480 wrote to memory of 2356	480	taskeng.exe	44

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\vlz.exe
"C:\Users\Admin\AppData\Local\Temp\vlz.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3060
- 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\vlz.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1336
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'vlz.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2720
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2880
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2152
- 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⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1816

C:\Windows\system32\taskeng.exe
taskeng.exe {62C9360D-9081-428E-89BE-E5767FDB10CD} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:480
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2524
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2284
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2356

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

Filesize
7KB

MD5
ba92f9e762ec374cf71630792154b751

SHA1
9bb2ec35ce0cb0faa3d81d45c20e0daed36da1ed

SHA256
d651c865c4cc2f5981bdbc15283fd382a46b4e6ddb4b2580b4d55cdcb5752a47

SHA512
513dc6cdc8e8b35b38cd8c761c2a9365ea68b9d25054c20066e5c702a012b95bee03a47a97040f69e4818bc6ae3686e06775371cf91f13aecc51e1592147b14e

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

Filesize
335KB

MD5
1c3d5b401cebef06499718e000aa6c2b

SHA1
2f337e0fe1562aea14c4256afd47bce049e79f3c

SHA256
aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659

SHA512
f7d069f73b7b423123352ce100668608ae430151ceeddc0df542508b93ce7c4c3310bda4e8488888d9f425dfd26c0db4bd8070f0128697d23ffd44fdfdb42093

Download Submit
memory/1336-7-0x00000000022D0000-0x0000000002350000-memory.dmp

Filesize
512KB

Download
memory/1336-8-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/1336-9-0x0000000002350000-0x0000000002358000-memory.dmp

Filesize
32KB

Download
memory/2524-37-0x0000000001150000-0x00000000011AA000-memory.dmp

Filesize
360KB

Download
memory/2720-15-0x000000001B560000-0x000000001B842000-memory.dmp

Filesize
2.9MB

Download
memory/2720-16-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/3060-0-0x000007FEF5753000-0x000007FEF5754000-memory.dmp

Filesize
4KB

Download
memory/3060-22-0x000007FEF5753000-0x000007FEF5754000-memory.dmp

Filesize
4KB

Download
memory/3060-2-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-33-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-1-0x0000000000370000-0x00000000003CA000-memory.dmp

Filesize
360KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads