xworm | cb4fcc07a8913820d0b8f5c35c7d2f35f6a3bd27dc65d88bccc4904039d6d71e

Analysis

max time kernel
149s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
30/09/2026, 12:50

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
Legend kiiler v.exe
Size 240KB
Sample260930-p298baxtdx
SHA256 cb4fcc07a8913820d0b8f5c35c7d2f35f6a3bd27dc65d88bccc4904039d6d71e
MD5 b741e5905f5fa916809481a273a895d4
SHA1 75cba6e5491413e5a2591341ab006680e7b87178
SHA512 d83eb5d02102087ef24941d0f4ec0c16d31528de163522e59cb2a1312a9340ca9130a523f0564fc5dc1c67b7da2385ebf20465c0ebf693ee09a95b62d34807aa
SSDEEP 6144:Dxo7FyWkpHHwVDOT6VWpHyuE8qnChPkHCMdpsShZ:DyipHHiy2MpHyZpHCMIS3
TLSH
T127343B4027D4C92BEABF47B9E4B1123067B9F1479522DB4A788C55FD6B233408923B6F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution xworm persistence privilege_escalation ransomware rat trojan

Malware Config

Extracted

Family

xworm

Version

38.tcp.vip.cpolar.cn:12402

Attributes

Install_directory
%LocalAppData%
install_file
USB.exe

Signatures

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

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4260-35-0x0000000000F40000-0x0000000000F52000-memory.dmp	family_xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1108	powershell.exe
3532	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000\Control Panel\International\Geo\Nation	Legend kiiler v.exe

Creates a file in the Startup directory 1 TTPs 2 IoCs

A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

persistence privilege_escalation

Registry Run Keys / Startup Folder

T1547.001

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

Executes dropped EXE 2 IoCs

pid	Process
1848	wlanext.exe
4260	wlanext.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-1-5-21-240542094-4193773837-3211495583-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wlanext = "C:\\Users\\Admin\\AppData\\Local\\wlanext.exe"	wlanext.exe

Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs

Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

Web Service

T1102

flow	ioc
6	discord.com
8	discord.com

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

ioc	Process
\??\F:\	powershell.exe
\??\F:\	powershell.exe

Looks up external IP address via web service 1 TTPs 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4368	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	Legend kiiler v.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	Legend kiiler v.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	wlanext.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	wlanext.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4628	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1108	powershell.exe
1108	powershell.exe
3532	powershell.exe
3532	powershell.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	4356	Legend kiiler v.exe
Token: SeBackupPrivilege	4112	vssvc.exe
Token: SeRestorePrivilege	4112	vssvc.exe
Token: SeAuditPrivilege	4112	vssvc.exe
Token: SeDebugPrivilege	1108	powershell.exe
Token: SeDebugPrivilege	3532	powershell.exe
Token: SeDebugPrivilege	1848	wlanext.exe
Token: SeDebugPrivilege	4260	wlanext.exe
Token: SeDebugPrivilege	4260	wlanext.exe
Token: SeDebugPrivilege	4260	wlanext.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 1108	4356	Legend kiiler v.exe	91
PID 4356 wrote to memory of 3532	4356	Legend kiiler v.exe	93
PID 4356 wrote to memory of 4368	4356	Legend kiiler v.exe	104
PID 4368 wrote to memory of 4628	4368	cmd.exe	106

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
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\Legend kiiler v.exe
"C:\Users\Admin\AppData\Local\Temp\Legend kiiler v.exe"
1⤵
- Checks computer location settings
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4356
- 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\wlanext.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Enumerates connected drives
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1108
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'wlanext.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Enumerates connected drives
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3532
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE23D.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4368
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4628

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4112

C:\Users\Admin\AppData\Local\Temp\wlanext.exe
C:\Users\Admin\AppData\Local\Temp\wlanext.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1848

C:\Users\Admin\AppData\Local\Temp\wlanext.exe
C:\Users\Admin\AppData\Local\Temp\wlanext.exe
1⤵
- Creates a file in the Startup directory
- Executes dropped EXE
- Adds Run key to start application
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:4260

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
TLSH
T1CE51EE323375B1E888167F071E681A8053BF4355EA94AF1CB698621ED93641B9F222F3
MD5 SHA1 SHA512 TLSH

Submit Download

wlanext.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\wlanext.exe.log
Size 1KB
SHA256 f825024aeb196af7aa49d77dccfae841aa55f9fef1c1f6f8f1e0c61032f8be12
MD5 c952c967a6c1013f7155cc3efed8cd03
SHA1 dc5bbab6c51387ee4d9863415a196e297457d045
SHA512 8126ef222f9ed0f332f56b8754ed24845fc03fadcbe61bf6d82e07da81b143e120ce82be14e59dc98b460e399563e8461bf0925089a71008af58b3acd6d6afef
TLSH
T1DC31AE312376E1D889153F522C2D2AC413BF0766B690EE1C7594A29ED9360175F212F7
MD5 SHA1 SHA512 TLSH

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 e8f1393a9e1a21ef9c18231e6d1301624694e6036ec8ddf1234219eb96222a28
MD5 164a45e66dbe5b4c1fad9ced25394a84
SHA1 5f90cf92b891734679ddb12be560b2ec4c6282d7
SHA512 d05e8eebd235ed67a9a4c8f13004cf576df60ae068b81cd11a9d3de69cde110bf3983005a55adac948c5e8f5843b44c865b56dad4d8a37de3d2e442c4ef2eb55
TLSH
T189112223F38C8920CC96163A509DAC5172B586CB81EEDF9F7FC0D210A1BF584CBA1294
MD5 SHA1 SHA512 TLSH

Submit Download

__PSScriptPolicyTest_4tlz5l0t.5ce.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4tlz5l0t.5ce.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

tmpE23D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpE23D.tmp.bat
Size 167B
SHA256 e746f0f8083bc372ba6c383fd85b423d4df0bd70a0b9b0d4009da6a4e659495f
MD5 f56a99d7149d52082be655e9112eef53
SHA1 15ba9c87e321e5daf5d4f032ec12d8406c5c920e
SHA512 ac6e0908f413d582d3ac9e42171772f301da9821e21486e698c19b03fb0380d4e3be840ad53719fb4bcf6cf7ff2ae611abff89722fa0345c9ff0eb76322d3307
TLSH
T1DDC0800515CAFA45190924171576C04DC0775C5E3E456B505764400868C055CE4F5705
MD5 SHA1 SHA512 TLSH

Submit Download

wlanext.exe

Path C:\Users\Admin\AppData\Local\Temp\wlanext.exe
Size 240KB
SHA256 cb4fcc07a8913820d0b8f5c35c7d2f35f6a3bd27dc65d88bccc4904039d6d71e
MD5 b741e5905f5fa916809481a273a895d4
SHA1 75cba6e5491413e5a2591341ab006680e7b87178
SHA512 d83eb5d02102087ef24941d0f4ec0c16d31528de163522e59cb2a1312a9340ca9130a523f0564fc5dc1c67b7da2385ebf20465c0ebf693ee09a95b62d34807aa
SSDEEP 6144:Dxo7FyWkpHHwVDOT6VWpHyuE8qnChPkHCMdpsShZ:DyipHHiy2MpHyZpHCMIS3
TLSH
T127343B4027D4C92BEABF47B9E4B1123067B9F1479522DB4A788C55FD6B233408923B6F
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1108-3-0x0000020F7ADF0000-0x0000020F7AE00000-memory.dmp

Download

memory/1108-2-0x0000020F7ADF0000-0x0000020F7AE00000-memory.dmp

Download

memory/1108-4-0x0000020F7A850000-0x0000020F7A872000-memory.dmp

Download

memory/4260-35-0x0000000000F40000-0x0000000000F52000-memory.dmp

Download

memory/4356-0-0x0000000000FF0000-0x0000000001032000-memory.dmp

Download

memory/4356-1-0x0000000001900000-0x0000000001910000-memory.dmp

Download