xworm | cb4fcc07a8913820d0b8f5c35c7d2f35f6a3bd27dc65d88bccc4904039d6d71e

Analysis

max time kernel
148s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
30/09/2026, 12:50

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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
behavioral4/memory/5180-54-0x0000000000C20000-0x0000000000C32000-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
6036	powershell.exe
4908	powershell.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
3660	wlanext.exe
5180	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-1-5-21-4154726816-2055034831-2297277433-1000\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
1	discord.com
6	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
1	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
1184	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
3608	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
6036	powershell.exe
6036	powershell.exe
6036	powershell.exe
4908	powershell.exe
4908	powershell.exe
4908	powershell.exe

Suspicious use of AdjustPrivilegeToken 52 IoCs

description	pid	Process
Token: SeDebugPrivilege	3392	Legend kiiler v.exe
Token: SeBackupPrivilege	628	vssvc.exe
Token: SeRestorePrivilege	628	vssvc.exe
Token: SeAuditPrivilege	628	vssvc.exe
Token: SeDebugPrivilege	6036	powershell.exe
Token: SeIncreaseQuotaPrivilege	6036	powershell.exe
Token: SeSecurityPrivilege	6036	powershell.exe
Token: SeTakeOwnershipPrivilege	6036	powershell.exe
Token: SeLoadDriverPrivilege	6036	powershell.exe
Token: SeSystemProfilePrivilege	6036	powershell.exe
Token: SeSystemtimePrivilege	6036	powershell.exe
Token: SeProfSingleProcessPrivilege	6036	powershell.exe
Token: SeIncBasePriorityPrivilege	6036	powershell.exe
Token: SeCreatePagefilePrivilege	6036	powershell.exe
Token: SeBackupPrivilege	6036	powershell.exe
Token: SeRestorePrivilege	6036	powershell.exe
Token: SeShutdownPrivilege	6036	powershell.exe
Token: SeDebugPrivilege	6036	powershell.exe
Token: SeSystemEnvironmentPrivilege	6036	powershell.exe
Token: SeRemoteShutdownPrivilege	6036	powershell.exe
Token: SeUndockPrivilege	6036	powershell.exe
Token: SeManageVolumePrivilege	6036	powershell.exe
Token: 33	6036	powershell.exe
Token: 34	6036	powershell.exe
Token: 35	6036	powershell.exe
Token: 36	6036	powershell.exe
Token: SeDebugPrivilege	4908	powershell.exe
Token: SeIncreaseQuotaPrivilege	4908	powershell.exe
Token: SeSecurityPrivilege	4908	powershell.exe
Token: SeTakeOwnershipPrivilege	4908	powershell.exe
Token: SeLoadDriverPrivilege	4908	powershell.exe
Token: SeSystemProfilePrivilege	4908	powershell.exe
Token: SeSystemtimePrivilege	4908	powershell.exe
Token: SeProfSingleProcessPrivilege	4908	powershell.exe
Token: SeIncBasePriorityPrivilege	4908	powershell.exe
Token: SeCreatePagefilePrivilege	4908	powershell.exe
Token: SeBackupPrivilege	4908	powershell.exe
Token: SeRestorePrivilege	4908	powershell.exe
Token: SeShutdownPrivilege	4908	powershell.exe
Token: SeDebugPrivilege	4908	powershell.exe
Token: SeSystemEnvironmentPrivilege	4908	powershell.exe
Token: SeRemoteShutdownPrivilege	4908	powershell.exe
Token: SeUndockPrivilege	4908	powershell.exe
Token: SeManageVolumePrivilege	4908	powershell.exe
Token: 33	4908	powershell.exe
Token: 34	4908	powershell.exe
Token: 35	4908	powershell.exe
Token: 36	4908	powershell.exe
Token: SeDebugPrivilege	3660	wlanext.exe
Token: SeDebugPrivilege	5180	wlanext.exe
Token: SeDebugPrivilege	5180	wlanext.exe
Token: SeDebugPrivilege	5180	wlanext.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3392 wrote to memory of 6036	3392	Legend kiiler v.exe	92
PID 3392 wrote to memory of 4908	3392	Legend kiiler v.exe	95
PID 3392 wrote to memory of 1184	3392	Legend kiiler v.exe	100
PID 1184 wrote to memory of 3608	1184	cmd.exe	102

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⤵
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3392
- 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:6036
- 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:4908
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp300A.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:1184
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3608

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:628

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:3660

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:5180

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

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Downloads

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 435471b87a1a97b0e29f7d5dd0878e63031511f063629d7e750852c068e7c4f5
MD5 81b56f1dad28119d54bf23c83fc570b9
SHA1 cb9a89a716465611149ce3c700bd60681d434faf
SHA512 77bd4d53ca86d66d29ba662dd424e94e5cef46c6a460cbf9f8d87a40c627401c0f6d0fe30258c23ed1cf63df1a70b19288885a33c206fb85a19f12efaab61927
TLSH
T1F3216833B3DD8614C89A413A10CDAC1036B6C7DB40DECFAB7B84E655A43F699CE61160
MD5 SHA1 SHA512 TLSH

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__PSScriptPolicyTest_o5ljxr41.0es.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_o5ljxr41.0es.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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tmp300A.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp300A.tmp.bat
Size 167B
SHA256 e2236eca0238bd9a9ae76defadd1555f612a82c3c5b7deeb72b920c257375c7f
MD5 3d89300099065bd02ee84458048b4ebb
SHA1 2b01b5bc6fe6c88c1a02301ef656782c56365fcd
SHA512 f9f04bd95cb0574b83d05b22b62c15ad4137d00c74535b5b95e5c82bbdbb9b3b5e416dace6fd1e0dc78f925c708f69cc0a8518d97498c851efc79ee152e82361
TLSH
T196C08C061ACAFA4A1E0E241B15B6C18EC1666C5E3E81AB509768804878828ACE4F9306
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/3392-10-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-11-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-6-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-7-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-8-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-9-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-0-0x00007FFBB0ABF000-0x00007FFBB0AC0000-memory.dmp

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memory/3392-5-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-1-0x0000000000030000-0x0000000000072000-memory.dmp

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memory/3392-4-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-53-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-48-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-47-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-3-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/3392-2-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/5180-54-0x0000000000C20000-0x0000000000C32000-memory.dmp

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memory/6036-23-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-22-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-27-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-26-0x00000250FCE80000-0x00000250FCE9E000-memory.dmp

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memory/6036-28-0x00000250FCEA0000-0x00000250FCF52000-memory.dmp

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memory/6036-29-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-30-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-31-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-32-0x00000250FCF60000-0x00000250FCF6A000-memory.dmp

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memory/6036-33-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-34-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-36-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-21-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-20-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-19-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-18-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-17-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-16-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-15-0x00007FFBB0930000-0x00007FFBB12D4000-memory.dmp

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memory/6036-14-0x00000250FCCC0000-0x00000250FCCE2000-memory.dmp

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