xworm | 8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5

Analysis

max time kernel
1048s
max time network
1049s
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, 15:43

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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
behavioral2/memory/2448-1-0x00000000002B0000-0x00000000002C4000-memory.dmp	family_xworm
behavioral2/files/0x00280000000450f8-59.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
4696	powershell.exe
2992	powershell.exe
2596	powershell.exe
408	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-1-5-21-2319007114-3335580451-2147236418-1000\Control Panel\International\Geo\Nation	winlogon.exe

Executes dropped EXE 18 IoCs

pid	Process
1948	winlogon.exe
4024	winlogon.exe
2872	winlogon.exe
2932	winlogon.exe
408	winlogon.exe
2548	winlogon.exe
1672	winlogon.exe
4440	winlogon.exe
4956	winlogon.exe
2156	winlogon.exe
4332	winlogon.exe
4004	winlogon.exe
2964	winlogon.exe
5032	winlogon.exe
3524	winlogon.exe
3616	winlogon.exe
1048	winlogon.exe
1180	winlogon.exe

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

Web Service

T1102

flow	ioc
18	pastebin.com
19	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
3028	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2448	winlogon.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
4696	powershell.exe
4696	powershell.exe
2992	powershell.exe
2992	powershell.exe
2596	powershell.exe
2596	powershell.exe
408	powershell.exe
408	powershell.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe
2448	winlogon.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2448	winlogon.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	winlogon.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeIncreaseQuotaPrivilege	4696	powershell.exe
Token: SeSecurityPrivilege	4696	powershell.exe
Token: SeTakeOwnershipPrivilege	4696	powershell.exe
Token: SeLoadDriverPrivilege	4696	powershell.exe
Token: SeSystemProfilePrivilege	4696	powershell.exe
Token: SeSystemtimePrivilege	4696	powershell.exe
Token: SeProfSingleProcessPrivilege	4696	powershell.exe
Token: SeIncBasePriorityPrivilege	4696	powershell.exe
Token: SeCreatePagefilePrivilege	4696	powershell.exe
Token: SeBackupPrivilege	4696	powershell.exe
Token: SeRestorePrivilege	4696	powershell.exe
Token: SeShutdownPrivilege	4696	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeSystemEnvironmentPrivilege	4696	powershell.exe
Token: SeRemoteShutdownPrivilege	4696	powershell.exe
Token: SeUndockPrivilege	4696	powershell.exe
Token: SeManageVolumePrivilege	4696	powershell.exe
Token: 33	4696	powershell.exe
Token: 34	4696	powershell.exe
Token: 35	4696	powershell.exe
Token: 36	4696	powershell.exe
Token: SeDebugPrivilege	2992	powershell.exe
Token: SeIncreaseQuotaPrivilege	2992	powershell.exe
Token: SeSecurityPrivilege	2992	powershell.exe
Token: SeTakeOwnershipPrivilege	2992	powershell.exe
Token: SeLoadDriverPrivilege	2992	powershell.exe
Token: SeSystemProfilePrivilege	2992	powershell.exe
Token: SeSystemtimePrivilege	2992	powershell.exe
Token: SeProfSingleProcessPrivilege	2992	powershell.exe
Token: SeIncBasePriorityPrivilege	2992	powershell.exe
Token: SeCreatePagefilePrivilege	2992	powershell.exe
Token: SeBackupPrivilege	2992	powershell.exe
Token: SeRestorePrivilege	2992	powershell.exe
Token: SeShutdownPrivilege	2992	powershell.exe
Token: SeDebugPrivilege	2992	powershell.exe
Token: SeSystemEnvironmentPrivilege	2992	powershell.exe
Token: SeRemoteShutdownPrivilege	2992	powershell.exe
Token: SeUndockPrivilege	2992	powershell.exe
Token: SeManageVolumePrivilege	2992	powershell.exe
Token: 33	2992	powershell.exe
Token: 34	2992	powershell.exe
Token: 35	2992	powershell.exe
Token: 36	2992	powershell.exe
Token: SeDebugPrivilege	2596	powershell.exe
Token: SeIncreaseQuotaPrivilege	2596	powershell.exe
Token: SeSecurityPrivilege	2596	powershell.exe
Token: SeTakeOwnershipPrivilege	2596	powershell.exe
Token: SeLoadDriverPrivilege	2596	powershell.exe
Token: SeSystemProfilePrivilege	2596	powershell.exe
Token: SeSystemtimePrivilege	2596	powershell.exe
Token: SeProfSingleProcessPrivilege	2596	powershell.exe
Token: SeIncBasePriorityPrivilege	2596	powershell.exe
Token: SeCreatePagefilePrivilege	2596	powershell.exe
Token: SeBackupPrivilege	2596	powershell.exe
Token: SeRestorePrivilege	2596	powershell.exe
Token: SeShutdownPrivilege	2596	powershell.exe
Token: SeDebugPrivilege	2596	powershell.exe
Token: SeSystemEnvironmentPrivilege	2596	powershell.exe
Token: SeRemoteShutdownPrivilege	2596	powershell.exe
Token: SeUndockPrivilege	2596	powershell.exe
Token: SeManageVolumePrivilege	2596	powershell.exe
Token: 33	2596	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2448	winlogon.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 4696	2448	winlogon.exe	84
PID 2448 wrote to memory of 4696	2448	winlogon.exe	84
PID 2448 wrote to memory of 2992	2448	winlogon.exe	89
PID 2448 wrote to memory of 2992	2448	winlogon.exe	89
PID 2448 wrote to memory of 2596	2448	winlogon.exe	91
PID 2448 wrote to memory of 2596	2448	winlogon.exe	91
PID 2448 wrote to memory of 408	2448	winlogon.exe	93
PID 2448 wrote to memory of 408	2448	winlogon.exe	93
PID 2448 wrote to memory of 3028	2448	winlogon.exe	96
PID 2448 wrote to memory of 3028	2448	winlogon.exe	96
PID 2448 wrote to memory of 5052	2448	winlogon.exe	103
PID 2448 wrote to memory of 5052	2448	winlogon.exe	103

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 behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2448
- 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:4696
- 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:2992
- 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:2596
- 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:408
- 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:3028
- C:\Windows\SYSTEM32\CMD.EXE
  "CMD.EXE"
  2⤵
  PID:5052

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:1948

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:4024

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:2872

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:2932

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:408

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:2548

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:1672

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:4440

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:4956

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:2156

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:4332

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:4004

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:2964

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:5032

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:3524

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:3616

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:1048

C:\ProgramData\winlogon.exe
"C:\ProgramData\winlogon.exe"
1⤵
- Executes dropped EXE
PID:1180

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

Replay Monitor

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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
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
1KB

MD5
f30fecdba307b8ccf949db4333c045c5

SHA1
e627bf6975d2281a809475bbd85d4d057e995531

SHA256
9e3d1038a48c2eddcfdc50fa8832ad5f06cd1fdf095ab7afc7f3b6a817eb9dc2

SHA512
64054c2b92004de674575eedaf91c958fcab41508aea074a79bcdc0428ee7357784a21138f61129305f6d8ec2110619624387422df08ee4eb436a89395b88702

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

Filesize
1KB

MD5
c9569d209d2c7736dd0bf85e5b391e18

SHA1
123597f50a683c6b8b724460aba71b8fbd92d7a7

SHA256
e65255c123e55f2972607e6f596be0e8f879a946bdceb235b635f557046bc4b7

SHA512
40d491e266869814da5f87410ca2b1de279a1bcd89ef382b13940bdbb9f017d3ad6ece22ab98c8f06fb9d227c4adeafd390be622cb27dd08240f201e96a5ca6a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vqmuj41c.elo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/408-54-0x00000220FDE30000-0x00000220FE04D000-memory.dmp

Filesize
2.1MB

Download
memory/2448-56-0x00007FFB71443000-0x00007FFB71445000-memory.dmp

Filesize
8KB

Download
memory/2448-0-0x00007FFB71443000-0x00007FFB71445000-memory.dmp

Filesize
8KB

Download
memory/2448-57-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/2448-58-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/2448-1-0x00000000002B0000-0x00000000002C4000-memory.dmp

Filesize
80KB

Download
memory/2448-68-0x000000001BFB0000-0x000000001BFBA000-memory.dmp

Filesize
40KB

Download
memory/4696-19-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/4696-16-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/4696-15-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/4696-14-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/4696-13-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/4696-12-0x00007FFB71440000-0x00007FFB71F02000-memory.dmp

Filesize
10.8MB

Download
memory/4696-9-0x00000129FAD20000-0x00000129FAD42000-memory.dmp

Filesize
136KB

Download