xworm | 8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5

Analysis

max time kernel
124s
max time network
150s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
31/10/2024, 16:58

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General

Target

winlogon.exe
Size

59KB
MD5

f2a18b995a82e938ab6a067491aa0d79
SHA1

d437fca2f38d712bafae8c92169eec8934699e54
SHA256

8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5
SHA512

73db4ec0271045f3f2c40fa197cf6300d81f32e4ecdddf792b475c8234d997c8d9ddfd62f944f230d8929017dfd1f473fbf4470f3bf6c2e92a8606cd3fed6d56
SSDEEP

1536:CcG/DG/fDG+wopontVm+4ys9bFKR4F+9E6ywbgOmXvkAq:CcGGfDG+wWoPm+4X9bFKac/0Omfbq

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%ProgramData%
install_file
winlogon.exe
pastebin_url
https://pastebin.com/raw/QUwdrCNg

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2640-0-0x0000000000720000-0x0000000000734000-memory.dmp	family_xworm
behavioral1/files/0x002c0000000450d5-57.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
1032	powershell.exe
5096	powershell.exe
2984	powershell.exe
3604	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-1-5-21-4074627901-37362009-3519777259-1000\Control Panel\International\Geo\Nation	winlogon.exe

Executes dropped EXE 2 IoCs

pid	Process
3104	winlogon.exe
3848	winlogon.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
15	pastebin.com
16	pastebin.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
4884	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2640	winlogon.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1032	powershell.exe
1032	powershell.exe
5096	powershell.exe
5096	powershell.exe
2984	powershell.exe
2984	powershell.exe
3604	powershell.exe
3604	powershell.exe
2640	winlogon.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2640	winlogon.exe
Token: SeDebugPrivilege	1032	powershell.exe
Token: SeIncreaseQuotaPrivilege	1032	powershell.exe
Token: SeSecurityPrivilege	1032	powershell.exe
Token: SeTakeOwnershipPrivilege	1032	powershell.exe
Token: SeLoadDriverPrivilege	1032	powershell.exe
Token: SeSystemProfilePrivilege	1032	powershell.exe
Token: SeSystemtimePrivilege	1032	powershell.exe
Token: SeProfSingleProcessPrivilege	1032	powershell.exe
Token: SeIncBasePriorityPrivilege	1032	powershell.exe
Token: SeCreatePagefilePrivilege	1032	powershell.exe
Token: SeBackupPrivilege	1032	powershell.exe
Token: SeRestorePrivilege	1032	powershell.exe
Token: SeShutdownPrivilege	1032	powershell.exe
Token: SeDebugPrivilege	1032	powershell.exe
Token: SeSystemEnvironmentPrivilege	1032	powershell.exe
Token: SeRemoteShutdownPrivilege	1032	powershell.exe
Token: SeUndockPrivilege	1032	powershell.exe
Token: SeManageVolumePrivilege	1032	powershell.exe
Token: 33	1032	powershell.exe
Token: 34	1032	powershell.exe
Token: 35	1032	powershell.exe
Token: 36	1032	powershell.exe
Token: SeDebugPrivilege	5096	powershell.exe
Token: SeIncreaseQuotaPrivilege	5096	powershell.exe
Token: SeSecurityPrivilege	5096	powershell.exe
Token: SeTakeOwnershipPrivilege	5096	powershell.exe
Token: SeLoadDriverPrivilege	5096	powershell.exe
Token: SeSystemProfilePrivilege	5096	powershell.exe
Token: SeSystemtimePrivilege	5096	powershell.exe
Token: SeProfSingleProcessPrivilege	5096	powershell.exe
Token: SeIncBasePriorityPrivilege	5096	powershell.exe
Token: SeCreatePagefilePrivilege	5096	powershell.exe
Token: SeBackupPrivilege	5096	powershell.exe
Token: SeRestorePrivilege	5096	powershell.exe
Token: SeShutdownPrivilege	5096	powershell.exe
Token: SeDebugPrivilege	5096	powershell.exe
Token: SeSystemEnvironmentPrivilege	5096	powershell.exe
Token: SeRemoteShutdownPrivilege	5096	powershell.exe
Token: SeUndockPrivilege	5096	powershell.exe
Token: SeManageVolumePrivilege	5096	powershell.exe
Token: 33	5096	powershell.exe
Token: 34	5096	powershell.exe
Token: 35	5096	powershell.exe
Token: 36	5096	powershell.exe
Token: SeDebugPrivilege	2984	powershell.exe
Token: SeIncreaseQuotaPrivilege	2984	powershell.exe
Token: SeSecurityPrivilege	2984	powershell.exe
Token: SeTakeOwnershipPrivilege	2984	powershell.exe
Token: SeLoadDriverPrivilege	2984	powershell.exe
Token: SeSystemProfilePrivilege	2984	powershell.exe
Token: SeSystemtimePrivilege	2984	powershell.exe
Token: SeProfSingleProcessPrivilege	2984	powershell.exe
Token: SeIncBasePriorityPrivilege	2984	powershell.exe
Token: SeCreatePagefilePrivilege	2984	powershell.exe
Token: SeBackupPrivilege	2984	powershell.exe
Token: SeRestorePrivilege	2984	powershell.exe
Token: SeShutdownPrivilege	2984	powershell.exe
Token: SeDebugPrivilege	2984	powershell.exe
Token: SeSystemEnvironmentPrivilege	2984	powershell.exe
Token: SeRemoteShutdownPrivilege	2984	powershell.exe
Token: SeUndockPrivilege	2984	powershell.exe
Token: SeManageVolumePrivilege	2984	powershell.exe
Token: 33	2984	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2640	winlogon.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2640 wrote to memory of 1032	2640	winlogon.exe	82
PID 2640 wrote to memory of 1032	2640	winlogon.exe	82
PID 2640 wrote to memory of 5096	2640	winlogon.exe	87
PID 2640 wrote to memory of 5096	2640	winlogon.exe	87
PID 2640 wrote to memory of 2984	2640	winlogon.exe	91
PID 2640 wrote to memory of 2984	2640	winlogon.exe	91
PID 2640 wrote to memory of 3604	2640	winlogon.exe	93
PID 2640 wrote to memory of 3604	2640	winlogon.exe	93
PID 2640 wrote to memory of 4884	2640	winlogon.exe	96
PID 2640 wrote to memory of 4884	2640	winlogon.exe	96

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\winlogon.exe
"C:\Users\Admin\AppData\Local\Temp\winlogon.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2640
- 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\winlogon.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1032
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'winlogon.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5096
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\winlogon.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2984
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'winlogon.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:3604
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "winlogon" /tr "C:\ProgramData\winlogon.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4884

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:3104

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:3848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\winlogon.exe

Filesize
59KB

MD5
f2a18b995a82e938ab6a067491aa0d79

SHA1
d437fca2f38d712bafae8c92169eec8934699e54

SHA256
8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5

SHA512
73db4ec0271045f3f2c40fa197cf6300d81f32e4ecdddf792b475c8234d997c8d9ddfd62f944f230d8929017dfd1f473fbf4470f3bf6c2e92a8606cd3fed6d56

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\winlogon.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
1KB

MD5
6a807b1c91ac66f33f88a787d64904c1

SHA1
83c554c7de04a8115c9005709e5cd01fca82c5d3

SHA256
155314c1c86d8d4e5b802f1eef603c5dd4a2f7c949f069a38af5ba4959bd8256

SHA512
29f2d9f30fc081e7fe6e9fb772c810c9be0422afdc6aff5a286f49a990ededebcf0d083798c2d9f41ad8434393c6d0f5fa6df31226d9c3511ba2a41eb4a65200

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

Filesize
1KB

MD5
2af77bee6c760f7631c881830fca3cc2

SHA1
5c444037730e65d4b79f070e3d6c1d1e6d2063b9

SHA256
f8abcfc4432aa1052262db5854f2732f33142a4b7fc0b8dffc7463b0791c6308

SHA512
153f5c9e10c0869e02adbd17658fe59609a8949d9a9e0906906d5924ee9523c0d9db21943fef648cabea4efd7fbd219ad87fd7f62986345f0c11c01e79566935

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

Filesize
1KB

MD5
f1e843cd51c3ce764f34a731096ac65f

SHA1
f523df6793195f8c616af82b4a22ddb20b08c869

SHA256
3a6ec96ba90ea62bcf0ddb08e25782c7994f04c105a362216a92983be07a0bea

SHA512
31ea8fb7dd69fe2af8a577b9d607b7a55373525a1249ebd459fca213fbc8d5af97ec9a66b80107284f0e2c0b4d23786584244c1959523974e00879e22563276d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vjs0mmqe.c1c.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1032-12-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/1032-16-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/1032-19-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/1032-14-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/1032-15-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/1032-13-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/1032-2-0x00000231E70F0000-0x00000231E7112000-memory.dmp

Filesize
136KB

Download
memory/2640-1-0x00007FFDA4A93000-0x00007FFDA4A95000-memory.dmp

Filesize
8KB

Download
memory/2640-55-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/2640-56-0x00007FFDA4A90000-0x00007FFDA5552000-memory.dmp

Filesize
10.8MB

Download
memory/2640-0-0x0000000000720000-0x0000000000734000-memory.dmp

Filesize
80KB

Download