xworm | 92928ebfaff7dc919ec783798b7b107e9d97de105c2cf6a981a60e01461efb39

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
06/07/2026, 12:35

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General

Target
CotizaciondeAlborConsultores.vbs
Size 1.3MB
Sample260706-psltcsfs5w
SHA256 92928ebfaff7dc919ec783798b7b107e9d97de105c2cf6a981a60e01461efb39
MD5 b84c3476c63b2caac2016f171a0ade4c
SHA1 105153fbb6c35f6ffe8e669574be5493432d6d31
SHA512 0762e5605296ec4d9a82d089b9556734abd6b9e0eceed766e9b03a37de12e752f70b76e5022423ca044d0cb311aa9b6679a0a4125bacec268389a5a57945bfb9
SSDEEP 384:+BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBv:K7
TLSH
T13B554B4622D07BAC6D47E3C83AF0C6C3C9EE795B706C7C43E76A1FD0539970A6A50A19
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution xworm persistence rat trojan

Malware Config

Signatures

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

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/4084-13-0x0000000000400000-0x000000000041C000-memory.dmp	family_xworm

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4668	4876	powershell.exe	83

Badlisted process makes network request 2 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
6	4668	powershell.exe
9	4668	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Winrar32.lnk	Caspol.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Winrar32.lnk	Caspol.exe

Executes dropped EXE 2 IoCs

pid	Process
828	Winrar32.exe
1340	Winrar32.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-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winrar32 = "C:\\Users\\Admin\\AppData\\Roaming\\\\WindowsUpdate\\Winrar\\Winrar32.exe"	Caspol.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4668 set thread context of 4084	4668	powershell.exe	93

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4668	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Caspol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Winrar32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Winrar32.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe
4668	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4668	powershell.exe
Token: SeDebugPrivilege	4084	Caspol.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4028	conhost.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4028 wrote to memory of 2744	4028	conhost.exe	91
PID 4668 wrote to memory of 1440	4668	powershell.exe	92
PID 4668 wrote to memory of 4084	4668	powershell.exe	93
PID 4668 wrote to memory of 4084	4668	powershell.exe	93
PID 4668 wrote to memory of 4084	4668	powershell.exe	93
PID 4668 wrote to memory of 4084	4668	powershell.exe	93
PID 4668 wrote to memory of 4084	4668	powershell.exe	93

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:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\CotizaciondeAlborConsultores.vbs"
1⤵
PID:4188

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -NoProfile -Command "Invoke-Expression $env:defenestration"
1⤵
- Process spawned unexpected child process
- Badlisted process makes network request
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4668
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
  2⤵
  PID:1440
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4084

C:\Windows\system32\conhost.exe
conhost.exe
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe
  2⤵
  PID:2744

C:\Users\Admin\AppData\Roaming\WindowsUpdate\Winrar\Winrar32.exe
C:\Users\Admin\AppData\Roaming\\WindowsUpdate\Winrar\Winrar32.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:828

C:\Users\Admin\AppData\Roaming\WindowsUpdate\Winrar\Winrar32.exe
C:\Users\Admin\AppData\Roaming\WindowsUpdate\Winrar\Winrar32.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1340

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Query Registry

T1012

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Winrar32.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Winrar32.exe.log
Size 42B
SHA256 d8988d672d6915b46946b28c06ad8066c50041f6152a91d37ffa5cf129cc146b
MD5 84cfdb4b995b1dbf543b26b86c863adc
SHA1 d2f47764908bf30036cf8248b9ff5541e2711fa2
SHA512 485f0ed45e13f00a93762cbf15b4b8f996553baa021152fae5aba051e3736bcd3ca8f4328f0e6d9e3e1f910c96c4a9ae055331123ee08e3c2ce3a99ac2e177ce
MD5 SHA1 SHA512

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__PSScriptPolicyTest_rmrpejzh.2p5.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rmrpejzh.2p5.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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Winrar32.exe

Path C:\Users\Admin\AppData\Roaming\WindowsUpdate\Winrar\Winrar32.exe
Size 106KB
SHA256 7d3bdb5b7ee9685c7c18c0c3272da2a593f6c5c326f1ea67f22aae27c57ba1e6
MD5 914f728c04d3eddd5fba59420e74e56b
SHA1 8c68ca3f013c490161c0156ef359af03594ae5e2
SHA512 d7e49b361544ba22a0c66cf097e9d84db4f3759fbcc20386251caac6da80c591861c1468cb7a102eee1a1f86c974086ebc61de4027f9cd22ad06d63550400d6d
SSDEEP 1536:QSF7vA1hRqHNxxMjlI3ZC+0CtOss6mdcQ6A4vhZ91RKGpQJN:nA1hYPMUs6mdclA4vhNRKG4N
TLSH
T1B1B3C765B3FD1214F1FB8B70A9F89452593BFD9B6D41C26D2C89128D0A22BC1DA12F37
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/828-26-0x0000000000B60000-0x0000000000B7C000-memory.dmp

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memory/4084-17-0x0000000005540000-0x00000000055DC000-memory.dmp

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memory/4084-29-0x0000000006F00000-0x0000000006F92000-memory.dmp

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memory/4084-19-0x0000000005C30000-0x00000000061D4000-memory.dmp

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memory/4084-13-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/4084-18-0x0000000005610000-0x0000000005676000-memory.dmp

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memory/4668-10-0x000001ED99DC0000-0x000001ED99E74000-memory.dmp

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memory/4668-16-0x000001ED998A0000-0x000001ED99ABC000-memory.dmp

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memory/4668-12-0x000001ED99790000-0x000001ED997A0000-memory.dmp

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memory/4668-11-0x000001ED99770000-0x000001ED9977A000-memory.dmp

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memory/4668-1-0x000001ED99790000-0x000001ED997A0000-memory.dmp

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memory/4668-8-0x000001EDFF770000-0x000001EDFF792000-memory.dmp

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memory/4668-0-0x000001ED99790000-0x000001ED997A0000-memory.dmp

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