xworm | 68fb0d6a348b6962f02272a0f8018a83ab69576f09729bed1af975bb9b6544ea

Resubmissions

22-01-2025 13:19

250122-qkt1faypfj 10

18-01-2025 20:58

250118-zsgjratqhw 10

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
22-01-2025 13:19

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General

Target

NetCompilerCShrp.exe
Size

1.5MB
MD5

c125697bdf4aae54fa53be4e772c6a49
SHA1

919afec0cb7a46024a221c0c02721eca753ccd80
SHA256

68fb0d6a348b6962f02272a0f8018a83ab69576f09729bed1af975bb9b6544ea
SHA512

6e8b95b8aeae30ae09ff4674bf8f173cde38d9f5fdd2cce73ca694d1e2599f24cb81870f862cb77c8e89a271e8d5aae03cc82a52663727fca70577d166602488
SSDEEP

24576:/MeoskJNFkm0deK3zuRCLg4j43tpikJ8eTgOFGR2QRR0dwY1gjHq3V4:RkJNFPorzuRCLgs+nggIRq47V

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

unable-39391.portmap.host:39391

Attributes

Install_directory
%Temp%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x001b00000002aae8-18.dat	family_xworm
behavioral1/memory/5016-21-0x0000000000A80000-0x0000000000A98000-memory.dmp	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
1760	powershell.exe
72	powershell.exe
2572	powershell.exe
2676	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 5 IoCs

pid	Process
1756	HXSLoader.exe
5016	HXSLoader_protected.exe
1532	svchost.exe
244	svchost.exe
4128	svchost.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-1-5-21-4249425805-3408538557-1766626484-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe"	HXSLoader_protected.exe

Looks up external IP address via web service 1 IoCs

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

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4249425805-3408538557-1766626484-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe

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
4024	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1760	powershell.exe
1760	powershell.exe
72	powershell.exe
72	powershell.exe
2572	powershell.exe
2572	powershell.exe
2676	powershell.exe
2676	powershell.exe
5016	HXSLoader_protected.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	HXSLoader_protected.exe
Token: SeDebugPrivilege	1760	powershell.exe
Token: SeDebugPrivilege	72	powershell.exe
Token: SeDebugPrivilege	2572	powershell.exe
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeDebugPrivilege	5016	HXSLoader_protected.exe
Token: SeDebugPrivilege	1532	svchost.exe
Token: SeDebugPrivilege	244	svchost.exe
Token: SeDebugPrivilege	4128	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2172	MiniSearchHost.exe
5016	HXSLoader_protected.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 1756	4236	NetCompilerCShrp.exe	78
PID 4236 wrote to memory of 1756	4236	NetCompilerCShrp.exe	78
PID 4236 wrote to memory of 5016	4236	NetCompilerCShrp.exe	80
PID 4236 wrote to memory of 5016	4236	NetCompilerCShrp.exe	80
PID 5016 wrote to memory of 1760	5016	HXSLoader_protected.exe	82
PID 5016 wrote to memory of 1760	5016	HXSLoader_protected.exe	82
PID 5016 wrote to memory of 72	5016	HXSLoader_protected.exe	84
PID 5016 wrote to memory of 72	5016	HXSLoader_protected.exe	84
PID 5016 wrote to memory of 2572	5016	HXSLoader_protected.exe	86
PID 5016 wrote to memory of 2572	5016	HXSLoader_protected.exe	86
PID 5016 wrote to memory of 2676	5016	HXSLoader_protected.exe	88
PID 5016 wrote to memory of 2676	5016	HXSLoader_protected.exe	88
PID 5016 wrote to memory of 4024	5016	HXSLoader_protected.exe	90
PID 5016 wrote to memory of 4024	5016	HXSLoader_protected.exe	90

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\NetCompilerCShrp.exe
"C:\Users\Admin\AppData\Local\Temp\NetCompilerCShrp.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Users\Admin\AppData\Roaming\HXSLoader.exe
  "C:\Users\Admin\AppData\Roaming\HXSLoader.exe"
  2⤵
  - Executes dropped EXE
  PID:1756
- C:\Users\Admin\AppData\Roaming\HXSLoader_protected.exe
  "C:\Users\Admin\AppData\Roaming\HXSLoader_protected.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5016
- - 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\Roaming\HXSLoader_protected.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1760
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'HXSLoader_protected.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:72
- - 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\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2572
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2676
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4024

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:2172

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1532

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:244

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4128

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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

Filesize
944B

MD5
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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

Filesize
944B

MD5
0e88b64517c0e49a6b72b2f2f9e7e44a

SHA1
63d29644bef51f635909f2d0e68f13ce664e5d6f

SHA256
f3db9f3daf3783c8afb24b4fbe61f7b1a9277bfa8697824a988319f211f2d2c6

SHA512
7a58c45a3bd4accd5f003c29c564e899151df7b802cf6a7e3aafcaaa9e860683b316449e56bfda6615eee76f480351436388dc347ec206f801883ddea6643a60

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

Filesize
944B

MD5
f28832ecd9829ee81bb32f98f0747445

SHA1
ac0dc6c286da7b0b7b1b595aaf4f8877e1304125

SHA256
d44590cb55e999c1e0abdd9932e00ddde1bc637ac3eb7d02374ace88479f2f50

SHA512
3b72129f951df7d4b2437ed761ff00ea9dc046a284665a3036b9c86fd20626435f775ec2bb9665435b7d8ec6a211e6c54d1debae75b5ae8778797b3485a163fa

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
96329c73cc49cd960e2485210d01c4d2

SHA1
a496b98ad2f2bbf26687b5b7794a26aa4470148e

SHA256
4c159cab6c9ef5ff39e6141b0ccb5b8c6251a3d637520609dfbdd852fa94d466

SHA512
e98736a879cad24c693d6c5939654b2fd25bf9d348f738668624214f22d541a9b781c967201ab2d43cbac9207946824a0299d482485f4b63c48d5d2a839e5baf

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uti3wu5f.2wf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\HXSLoader.exe

Filesize
1.4MB

MD5
e756ae91ac4e68194bf78c4aa5600966

SHA1
dbf0789228bb7c15a4af1838d25a24db8c28d074

SHA256
c434cfb4c0ce58a6628720bee3e34415b063bc464cc1c3b0f479b9ed50c537c6

SHA512
7ebd439cb385f806860371a0c7faf5debccab2ae0f28b4ed9b5ad5fbcc6551e488c30d97c877f2cf0f50c943d6fa2f28f10226b5af6b890c19f7defd37e954ec

Download Submit
C:\Users\Admin\AppData\Roaming\HXSLoader_protected.exe

Filesize
67KB

MD5
cae60b73b1b4194eda197f4b63c8c058

SHA1
e155e936efc50f454883afc1380be0b1573eae04

SHA256
69ec99513199bd74d947b97fda99c3f2e2921652a6525ef2c260a6f920ece536

SHA512
af4a3910c63dc31bfe4f96563ce254c27d5b3c035eac87f929384af02dc3d2764a7910f338f799052eb258392efc6cd117343a3b8b8169e056d91cd1b57e60b0

Download Submit
memory/1760-33-0x000001A19A7F0000-0x000001A19A812000-memory.dmp

Filesize
136KB

Download
memory/4236-0-0x00007FFB50323000-0x00007FFB50325000-memory.dmp

Filesize
8KB

Download
memory/4236-1-0x0000000000C60000-0x0000000000DE4000-memory.dmp

Filesize
1.5MB

Download
memory/5016-24-0x00007FFB50320000-0x00007FFB50DE2000-memory.dmp

Filesize
10.8MB

Download
memory/5016-23-0x00007FFB50320000-0x00007FFB50DE2000-memory.dmp

Filesize
10.8MB

Download
memory/5016-21-0x0000000000A80000-0x0000000000A98000-memory.dmp

Filesize
96KB

Download
memory/5016-78-0x00007FFB50320000-0x00007FFB50DE2000-memory.dmp

Filesize
10.8MB

Download
memory/5016-79-0x00007FFB50320000-0x00007FFB50DE2000-memory.dmp

Filesize
10.8MB

Download