xworm | 68fb0d6a348b6962f02272a0f8018a83ab69576f09729bed1af975bb9b6544ea

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

C2

unable-39391.portmap.host:39391

Attributes

Install_directory
%Temp%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x001c00000002abc1-13.dat	family_xworm
behavioral1/memory/4512-21-0x0000000000980000-0x0000000000998000-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
3356	powershell.exe
228	powershell.exe
4656	powershell.exe
2716	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
796	HXSLoader.exe
4512	HXSLoader_protected.exe
2088	svchost.exe
1400	svchost.exe
808	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-1-5-21-3870231897-2573482396-1083937135-1000\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

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
2568	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2716	powershell.exe
2716	powershell.exe
3356	powershell.exe
3356	powershell.exe
228	powershell.exe
228	powershell.exe
4656	powershell.exe
4656	powershell.exe
4512	HXSLoader_protected.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	4512	HXSLoader_protected.exe
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	3356	powershell.exe
Token: SeDebugPrivilege	228	powershell.exe
Token: SeDebugPrivilege	4656	powershell.exe
Token: SeDebugPrivilege	4512	HXSLoader_protected.exe
Token: SeDebugPrivilege	2088	svchost.exe
Token: SeDebugPrivilege	1400	svchost.exe
Token: SeDebugPrivilege	808	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4512	HXSLoader_protected.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3200 wrote to memory of 796	3200	NetCompilerCShrp.exe	77
PID 3200 wrote to memory of 796	3200	NetCompilerCShrp.exe	77
PID 3200 wrote to memory of 4512	3200	NetCompilerCShrp.exe	79
PID 3200 wrote to memory of 4512	3200	NetCompilerCShrp.exe	79
PID 4512 wrote to memory of 2716	4512	HXSLoader_protected.exe	81
PID 4512 wrote to memory of 2716	4512	HXSLoader_protected.exe	81
PID 4512 wrote to memory of 3356	4512	HXSLoader_protected.exe	83
PID 4512 wrote to memory of 3356	4512	HXSLoader_protected.exe	83
PID 4512 wrote to memory of 228	4512	HXSLoader_protected.exe	85
PID 4512 wrote to memory of 228	4512	HXSLoader_protected.exe	85
PID 4512 wrote to memory of 4656	4512	HXSLoader_protected.exe	87
PID 4512 wrote to memory of 4656	4512	HXSLoader_protected.exe	87
PID 4512 wrote to memory of 2568	4512	HXSLoader_protected.exe	89
PID 4512 wrote to memory of 2568	4512	HXSLoader_protected.exe	89

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:3200
- C:\Users\Admin\AppData\Roaming\HXSLoader.exe
  "C:\Users\Admin\AppData\Roaming\HXSLoader.exe"
  2⤵
  - Executes dropped EXE
  PID:796
- 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:4512
- - 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:2716
- - 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:3356
- - 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:228
- - 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:4656
- - 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:2568

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:2088

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:1400

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:808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

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
1189a72e42e2321edf1ed3a8d5568687

SHA1
a2142fc754d6830de107d9d46f398483156f16a6

SHA256
009aee0a5f2d25ed79160e75cde58722def11663334ed20283e3afca32f971ea

SHA512
b1eb9b7aa7a57d0acec93b8152229b1f274a8d1b8f19133513486587f39b0636a9df89ddc6c2013e001d831f2b23cd0bb0fc084131824ea8e1dff134cd6d4f29

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

Filesize
944B

MD5
cef328ddb1ee8916e7a658919323edd8

SHA1
a676234d426917535e174f85eabe4ef8b88256a5

SHA256
a1b5b7ada8ebc910f20f91ada3991d3321104e9da598c958b1edac9f9aca0e90

SHA512
747400c20ca5b5fd1b54bc24e75e6a78f15af61df263be932d2ee7b2f34731c2de8ce03b2706954fb098c1ac36f0b761cf37e418738fa91f2a8ea78572f545cb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nkgbrjfr.3mf.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/2716-30-0x00000232EC9B0000-0x00000232EC9D2000-memory.dmp

Filesize
136KB

Download
memory/3200-0-0x00007FFAB8833000-0x00007FFAB8835000-memory.dmp

Filesize
8KB

Download
memory/3200-1-0x0000000000C30000-0x0000000000DB4000-memory.dmp

Filesize
1.5MB

Download
memory/4512-24-0x00007FFAB8830000-0x00007FFAB92F2000-memory.dmp

Filesize
10.8MB

Download
memory/4512-23-0x00007FFAB8830000-0x00007FFAB92F2000-memory.dmp

Filesize
10.8MB

Download
memory/4512-21-0x0000000000980000-0x0000000000998000-memory.dmp

Filesize
96KB

Download
memory/4512-71-0x00007FFAB8830000-0x00007FFAB92F2000-memory.dmp

Filesize
10.8MB

Download
memory/4512-74-0x00007FFAB8830000-0x00007FFAB92F2000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads