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 2 IoCs

resource	yara_rule
behavioral1/memory/1832-1-0x0000000000A10000-0x0000000000A6A000-memory.dmp	family_xworm
behavioral1/files/0x002000000002aa96-57.dat	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
1668	powershell.exe
3364	powershell.exe
4784	powershell.exe
2972	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 1 IoCs

pid	Process
908	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-1-5-21-4248760313-3670024077-2384670640-1000\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
1	ip-api.com

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1512	Notepad.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
3356	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2972	powershell.exe
2972	powershell.exe
1668	powershell.exe
1668	powershell.exe
3364	powershell.exe
3364	powershell.exe
4784	powershell.exe
4784	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1832	vlz.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	1668	powershell.exe
Token: SeDebugPrivilege	3364	powershell.exe
Token: SeDebugPrivilege	4784	powershell.exe
Token: SeDebugPrivilege	1832	vlz.exe
Token: SeDebugPrivilege	908	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1800	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1832 wrote to memory of 2972	1832	vlz.exe	79
PID 1832 wrote to memory of 2972	1832	vlz.exe	79
PID 1832 wrote to memory of 1668	1832	vlz.exe	81
PID 1832 wrote to memory of 1668	1832	vlz.exe	81
PID 1832 wrote to memory of 3364	1832	vlz.exe	83
PID 1832 wrote to memory of 3364	1832	vlz.exe	83
PID 1832 wrote to memory of 4784	1832	vlz.exe	85
PID 1832 wrote to memory of 4784	1832	vlz.exe	85
PID 1832 wrote to memory of 3356	1832	vlz.exe	87
PID 1832 wrote to memory of 3356	1832	vlz.exe	87

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:1832
- 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:2972
- 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:1668
- 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:3364
- 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:4784
- 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:3356

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4648

C:\Windows\System32\Notepad.exe
"C:\Windows\System32\Notepad.exe" C:\Users\Admin\Downloads\UndoStop.vbs
1⤵
- Opens file in notepad (likely ransom note)
PID:1512

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:908

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:1800

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
aa4f31835d07347297d35862c9045f4a

SHA1
83e728008935d30f98e5480fba4fbccf10cefb05

SHA256
99c83bc5c531e49d4240700142f3425aba74e18ebcc23556be32238ffde9cce0

SHA512
ec3a4bee8335007b8753ae8ac42287f2b3bcbb258f7fc3fb15c9f8d3e611cb9bf6ae2d3034953286a34f753e9ec33f7495e064bab0e8c7fcedd75d6e5eb66629

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6f0e62045515b66d0a0105abc22dbf19

SHA1
894d685122f3f3c9a3457df2f0b12b0e851b394c

SHA256
529811e4d3496c559f3bd92cd877b93b719c3ac4834202aa76ab9e16e25f9319

SHA512
f78426df6032ee77f8c463446ab1c6bb4669ef7a2463dead831ec4ff83a07d7dc702d79372d8bcaf4594bf0fb6e11e9f027f3e0325de9b19be5f51b7b80ed54a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
795938d4c6e7dbca544ec4bdca81c53a

SHA1
0ca41665a9b6b0c3159211aed5fc595de98afb6b

SHA256
dc400265ecb7f850894b2b648b956964d4fe75639f76bb3634a1f73c3182dbcb

SHA512
19d36e5b648a1d5faa7d7d67d454f0157f99a546532bcf538b1ff81b4acc126124ea937e143a49eb91dce2e657a53378b327078aaacb5c2a8c54a5249a5efff5

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
1301a13a0b62ba61652cdbf2d61f80fa

SHA1
1911d1f0d097e8f5275a29e17b0bcef305df1d9e

SHA256
7e75ad955706d05f5934810aebbd3b5a7742d5e5766efd9c4fc17ee492b2f716

SHA512
66aa4261628bb31ee416af70f4159c02e5bbfbe2f7645e87d70bb35b1f20fa915d62b25d99cd72c59580d1f64e6c6b5ad36ace6600d3bcdb67f45036d768ed8b

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
964219fcbf4c1e0008bc5e05686367a9

SHA1
685a0b860afbfd43305bc67763e41b296a22ba8b

SHA256
4f4388ce8c3055db4827ad4b6d7d6ffc7bead99955a3fbe44ab3a5454651ae25

SHA512
2745f64b2bd54740a5c1f754785c39eeda9b6b5112707cc8630ba188638442de7c636446f750aeb340905d9da26f96ee4e7f7c96e2b690058ce29d7b6efe8c16

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2vdfu4kh.wqw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
335KB

MD5
1c3d5b401cebef06499718e000aa6c2b

SHA1
2f337e0fe1562aea14c4256afd47bce049e79f3c

SHA256
aa3dabbac106353d10a29feef610256139771ae6bd70c86204623fc827dcb659

SHA512
f7d069f73b7b423123352ce100668608ae430151ceeddc0df542508b93ce7c4c3310bda4e8488888d9f425dfd26c0db4bd8070f0128697d23ffd44fdfdb42093

Download Submit
memory/1832-81-0x0000000001330000-0x000000000133C000-memory.dmp

Filesize
48KB

Download
memory/1832-56-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download
memory/1832-0-0x00007FFA0CAD3000-0x00007FFA0CAD5000-memory.dmp

Filesize
8KB

Download
memory/1832-40-0x00007FFA0CAD3000-0x00007FFA0CAD5000-memory.dmp

Filesize
8KB

Download
memory/1832-2-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download
memory/1832-1-0x0000000000A10000-0x0000000000A6A000-memory.dmp

Filesize
360KB

Download
memory/2972-9-0x0000016C2A5F0000-0x0000016C2A612000-memory.dmp

Filesize
136KB

Download
memory/2972-19-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download
memory/2972-16-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download
memory/2972-15-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download
memory/2972-14-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download
memory/2972-13-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download
memory/2972-3-0x00007FFA0CAD0000-0x00007FFA0D592000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads