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/2456-1-0x00000000009E0000-0x0000000000A3A000-memory.dmp	family_xworm
behavioral1/files/0x0004000000004ed7-34.dat	family_xworm
behavioral1/memory/3044-36-0x00000000011A0000-0x00000000011FA000-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
2680	powershell.exe
2684	powershell.exe
1660	powershell.exe
1052	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3044	XClient.exe
2212	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-1-5-21-3063565911-2056067323-3330884624-1000\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
2876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2680	powershell.exe
2684	powershell.exe
1660	powershell.exe
1052	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2456	vlz.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	2684	powershell.exe
Token: SeDebugPrivilege	1660	powershell.exe
Token: SeDebugPrivilege	1052	powershell.exe
Token: SeDebugPrivilege	2456	vlz.exe
Token: SeDebugPrivilege	3044	XClient.exe
Token: SeDebugPrivilege	2212	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 2680	2456	vlz.exe	32
PID 2456 wrote to memory of 2680	2456	vlz.exe	32
PID 2456 wrote to memory of 2680	2456	vlz.exe	32
PID 2456 wrote to memory of 2684	2456	vlz.exe	34
PID 2456 wrote to memory of 2684	2456	vlz.exe	34
PID 2456 wrote to memory of 2684	2456	vlz.exe	34
PID 2456 wrote to memory of 1660	2456	vlz.exe	36
PID 2456 wrote to memory of 1660	2456	vlz.exe	36
PID 2456 wrote to memory of 1660	2456	vlz.exe	36
PID 2456 wrote to memory of 1052	2456	vlz.exe	38
PID 2456 wrote to memory of 1052	2456	vlz.exe	38
PID 2456 wrote to memory of 1052	2456	vlz.exe	38
PID 2456 wrote to memory of 2876	2456	vlz.exe	40
PID 2456 wrote to memory of 2876	2456	vlz.exe	40
PID 2456 wrote to memory of 2876	2456	vlz.exe	40
PID 1956 wrote to memory of 3044	1956	taskeng.exe	45
PID 1956 wrote to memory of 3044	1956	taskeng.exe	45
PID 1956 wrote to memory of 3044	1956	taskeng.exe	45
PID 1956 wrote to memory of 2212	1956	taskeng.exe	47
PID 1956 wrote to memory of 2212	1956	taskeng.exe	47
PID 1956 wrote to memory of 2212	1956	taskeng.exe	47

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:2456
- 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:2680
- 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:2684
- 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:1660
- 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:1052
- 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:2876

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2652

C:\Windows\system32\taskeng.exe
taskeng.exe {872471C8-D9AC-4E46-808F-049F1ED33FFA} S-1-5-21-3063565911-2056067323-3330884624-1000:KHBTHJFA\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3044
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2212

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
d14ebe77f4652e5b8731d36167d2db7f

SHA1
fa08a11edb1d22be2045adaf08f396d2f5b9ebd7

SHA256
578e8a0d8ecd4672cdd0ae60780bfd6d6850c3b3099db88dbb1b8599c7d03a85

SHA512
65b5133896a57c92a0fbfe55e7c27f0ed3cbf6427e5dffee383849d60916b203aa8f504c22d87e356f4c767dce953922cf447dd4e731a1592da89c7b025e426f

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

Filesize
335KB

MD5
1c3d5b401cebef06499718e000aa6c2b

SHA1
2f337e0fe1562aea14c4256afd47bce049e79f3c

SHA256
aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659

SHA512
f7d069f73b7b423123352ce100668608ae430151ceeddc0df542508b93ce7c4c3310bda4e8488888d9f425dfd26c0db4bd8070f0128697d23ffd44fdfdb42093

Download Submit
memory/2456-27-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

Filesize
4KB

Download
memory/2456-2-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2456-0-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

Filesize
4KB

Download
memory/2456-32-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2456-1-0x00000000009E0000-0x0000000000A3A000-memory.dmp

Filesize
360KB

Download
memory/2680-7-0x0000000002B00000-0x0000000002B80000-memory.dmp

Filesize
512KB

Download
memory/2680-8-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2680-9-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2684-15-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2684-16-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/3044-36-0x00000000011A0000-0x00000000011FA000-memory.dmp

Filesize
360KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads