xworm | 9bed2d09b228519b7b0d423d96e05d45193b88f9669b3d7373ce92b8466ce072

Analysis

max time kernel
119s
max time network
146s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
27/07/2024, 21:05

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General

Target

Setup.exe
Size

296KB
MD5

4fbc8b878d44721f4f838334ac218ca3
SHA1

ab1bbbc858c32c512f3670db42da607ff8f5d797
SHA256

9bed2d09b228519b7b0d423d96e05d45193b88f9669b3d7373ce92b8466ce072
SHA512

804ece432385d03e546d247afa9f60722458262461e669792f24bf23704779b241c2562792aeec0cf7d450d61a967515e712704f33ede2814004d97cc3adde89
SSDEEP

3072:B9UoZkSvCRLTcda4bl7gWz3vW/XhQMg2t6tqnJr:Be8kCCRLTcs4blxvWvhDGq

Score

10^/10

xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Valdemar-62425.portmap.host:62425

Attributes

Install_directory
%ProgramData%
install_file
WinSysUpdater32.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/files/0x000900000001678f-13.dat	family_xworm
behavioral1/memory/2748-15-0x0000000001200000-0x000000000121E000-memory.dmp	family_xworm
behavioral1/memory/888-67-0x0000000000C80000-0x0000000000C9E000-memory.dmp	family_xworm
behavioral1/memory/1768-70-0x0000000000E30000-0x0000000000E4E000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
320	powershell.exe
1896	powershell.exe
2984	powershell.exe
2392	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\WinSysUpdater32.lnk	InspectedSetup.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WinSysUpdater32.lnk	InspectedSetup.exe

Executes dropped EXE 4 IoCs

pid	Process
1904	InspectedSetupV2.1.4.exe
2748	InspectedSetup.exe
888	WinSysUpdater32.exe
1768	WinSysUpdater32.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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\WinSysUpdater32 = "C:\\ProgramData\\WinSysUpdater32.exe"	InspectedSetup.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
4	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 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	AcroRd32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AcroRd32.exe

Modifies registry class 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\py_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\py_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\.py	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\.py\ = "py_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\py_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\py_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\py_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000_CLASSES\py_auto_file\	rundll32.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
1300	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2748	InspectedSetup.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
320	powershell.exe
1896	powershell.exe
2984	powershell.exe
2392	powershell.exe
2748	InspectedSetup.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3004	AcroRd32.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	InspectedSetup.exe
Token: SeDebugPrivilege	320	powershell.exe
Token: SeDebugPrivilege	1896	powershell.exe
Token: SeDebugPrivilege	2984	powershell.exe
Token: SeDebugPrivilege	2392	powershell.exe
Token: SeDebugPrivilege	2748	InspectedSetup.exe
Token: SeDebugPrivilege	888	WinSysUpdater32.exe
Token: SeDebugPrivilege	1768	WinSysUpdater32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3004	AcroRd32.exe
3004	AcroRd32.exe
2748	InspectedSetup.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 1904	2324	Setup.exe	31
PID 2324 wrote to memory of 1904	2324	Setup.exe	31
PID 2324 wrote to memory of 1904	2324	Setup.exe	31
PID 2324 wrote to memory of 2912	2324	Setup.exe	32
PID 2324 wrote to memory of 2912	2324	Setup.exe	32
PID 2324 wrote to memory of 2912	2324	Setup.exe	32
PID 1904 wrote to memory of 2748	1904	InspectedSetupV2.1.4.exe	33
PID 1904 wrote to memory of 2748	1904	InspectedSetupV2.1.4.exe	33
PID 1904 wrote to memory of 2748	1904	InspectedSetupV2.1.4.exe	33
PID 1904 wrote to memory of 2796	1904	InspectedSetupV2.1.4.exe	34
PID 1904 wrote to memory of 2796	1904	InspectedSetupV2.1.4.exe	34
PID 1904 wrote to memory of 2796	1904	InspectedSetupV2.1.4.exe	34
PID 2796 wrote to memory of 3004	2796	rundll32.exe	36
PID 2796 wrote to memory of 3004	2796	rundll32.exe	36
PID 2796 wrote to memory of 3004	2796	rundll32.exe	36
PID 2796 wrote to memory of 3004	2796	rundll32.exe	36
PID 2748 wrote to memory of 320	2748	InspectedSetup.exe	38
PID 2748 wrote to memory of 320	2748	InspectedSetup.exe	38
PID 2748 wrote to memory of 320	2748	InspectedSetup.exe	38
PID 2748 wrote to memory of 1896	2748	InspectedSetup.exe	40
PID 2748 wrote to memory of 1896	2748	InspectedSetup.exe	40
PID 2748 wrote to memory of 1896	2748	InspectedSetup.exe	40
PID 2748 wrote to memory of 2984	2748	InspectedSetup.exe	42
PID 2748 wrote to memory of 2984	2748	InspectedSetup.exe	42
PID 2748 wrote to memory of 2984	2748	InspectedSetup.exe	42
PID 2748 wrote to memory of 2392	2748	InspectedSetup.exe	44
PID 2748 wrote to memory of 2392	2748	InspectedSetup.exe	44
PID 2748 wrote to memory of 2392	2748	InspectedSetup.exe	44
PID 2748 wrote to memory of 1300	2748	InspectedSetup.exe	46
PID 2748 wrote to memory of 1300	2748	InspectedSetup.exe	46
PID 2748 wrote to memory of 1300	2748	InspectedSetup.exe	46
PID 2912 wrote to memory of 1728	2912	rundll32.exe	48
PID 2912 wrote to memory of 1728	2912	rundll32.exe	48
PID 2912 wrote to memory of 1728	2912	rundll32.exe	48
PID 2912 wrote to memory of 1728	2912	rundll32.exe	48
PID 112 wrote to memory of 888	112	taskeng.exe	50
PID 112 wrote to memory of 888	112	taskeng.exe	50
PID 112 wrote to memory of 888	112	taskeng.exe	50
PID 112 wrote to memory of 1768	112	taskeng.exe	51
PID 112 wrote to memory of 1768	112	taskeng.exe	51
PID 112 wrote to memory of 1768	112	taskeng.exe	51

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\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\Setup.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Users\Admin\AppData\Local\Temp\InspectedSetupV2.1.4.exe
  "C:\Users\Admin\AppData\Local\Temp\InspectedSetupV2.1.4.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1904
- - C:\Users\Admin\AppData\Roaming\InspectedSetup.exe
    "C:\Users\Admin\AppData\Roaming\InspectedSetup.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2748
  - - 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\InspectedSetup.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:320
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'InspectedSetup.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1896
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\WinSysUpdater32.exe'
      4⤵
      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 'WinSysUpdater32.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2392
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "WinSysUpdater32" /tr "C:\ProgramData\WinSysUpdater32.exe"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1300
- - C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Roaming\INSPECTEDfreeV2.4.py
    3⤵
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:2796
  - - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
      "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Roaming\INSPECTEDfreeV2.4.py"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      PID:3004
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\FreeINSPECTED.py
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
    "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\FreeINSPECTED.py"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1728

C:\Windows\system32\taskeng.exe
taskeng.exe {0457C575-FBFC-4F4D-AE8A-2582E7AE6C83} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:112
- C:\ProgramData\WinSysUpdater32.exe
  C:\ProgramData\WinSysUpdater32.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:888
- C:\ProgramData\WinSysUpdater32.exe
  C:\ProgramData\WinSysUpdater32.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1768

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\FreeINSPECTED.py

Filesize
6KB

MD5
1548bd62ce778723ca94f6c6ac710540

SHA1
bff334f3430794a78c5c6a64b2f3cc17592c96de

SHA256
a43db9b3f7d546f83a74a0fe5c377abac4512dc10cf3117918a4ca4abe9e7c40

SHA512
5f69e099ad09ca08165b60819a70366185e08361a597d4d96b9e60ad2d1d1a1e4f39dcdd152d15c276053079a06cc95226f1c8766d4e0d6407799ede9cd97885

Download Submit
C:\Users\Admin\AppData\Local\Temp\InspectedSetupV2.1.4.exe

Filesize
112KB

MD5
b6e3ad794d2172d8e6c909b904bccccb

SHA1
6618a1276353c6c4e4c746a190ef31098d3c9f38

SHA256
cf368edca395eeac03f42d5f902fcada7f4262802ff95631712347563d8bdb05

SHA512
a50abeec4ab2f3cdc42ddb4a852aa7ee10376cd140b607f98be4b96995d2b0b4722e2d0286133d88ccd1f4ece2dec01f79d2b8e67f93cac1d040a72cde1dd605

Download Submit
C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
83433f6fde21e2b8f47760a4f07244e2

SHA1
b9ffce59ec464808133fd58837e21a53220a5062

SHA256
1112748d8df01ea8026b6f6ffa7e7f17782778fc2da1f1d6736b69e1295558ef

SHA512
77743586b9e91f1b34376bf3ca23979b36c3302785095fd0fce6ec3368c46ff2ac7b4986e02bf580544f4a77a3fa53df8786a2ada0b66bffbb915c9caf068df0

Download Submit
C:\Users\Admin\AppData\Roaming\INSPECTEDfreeV2.4.py

Filesize
4KB

MD5
c717302066b1825d61744234057afd46

SHA1
a51f638e23311b7f35f2832e8739c3e4c5a83257

SHA256
a178663e55f00f9a234851a278d91bd4c02796477b9cafefaa2cd36df7277d87

SHA512
1e9c0315050ee435607cc90ac8e4180f0659f1469944af79cfb2a418efb714ebaa529f4a79698a6a78853c796b6af4c4d58de50379740f74c8c221850a3976a7

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

Filesize
97KB

MD5
2edb664bcabf152026fa329515a96821

SHA1
230f2c370647ba1e41498aa2efa8cba6f512642f

SHA256
6548408ffacead04d0e33df162a247f2f8542ea9c98b50698476b86380f3547b

SHA512
a65b623fe37143e0eba265d3cd80a68ecc30e836be13fc113177e4e2e40ab508c9e3a1bd1952f45b8e01bccc7a43e96ef18f41d2ea5de1bd4ab7bc67c19fef70

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
b498fc890256b2fc1a667706eb5fbee3

SHA1
0ea85040fbb944f672ff922638223a9905953690

SHA256
0053e6da61d60aa887f8164f11d884f41891e06fbd098c793ee601d9fdf8e1dc

SHA512
1ad023faa8ef879f5ca508db9ea12e01c4be763e6736d8107917c530642461db92ade71126859b38aa5911a8c53b49f9d1c57408771915126bdb007baedb393e

Download Submit
memory/320-22-0x000000001B4F0000-0x000000001B7D2000-memory.dmp

Filesize
2.9MB

Download
memory/320-23-0x0000000002890000-0x0000000002898000-memory.dmp

Filesize
32KB

Download
memory/888-67-0x0000000000C80000-0x0000000000C9E000-memory.dmp

Filesize
120KB

Download
memory/1768-70-0x0000000000E30000-0x0000000000E4E000-memory.dmp

Filesize
120KB

Download
memory/1896-29-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/1896-30-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/1904-16-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/1904-8-0x00000000002D0000-0x00000000002F2000-memory.dmp

Filesize
136KB

Download
memory/2324-0-0x000007FEF5D03000-0x000007FEF5D04000-memory.dmp

Filesize
4KB

Download
memory/2324-1-0x00000000008E0000-0x0000000000930000-memory.dmp

Filesize
320KB

Download
memory/2748-15-0x0000000001200000-0x000000000121E000-memory.dmp

Filesize
120KB

Download