xworm | 4584e840367c8990cb040f840d4e6af35424e3ab7618985bfc76190757eae2a2

Analysis

max time kernel
298s
max time network
300s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
07-09-2024 20:54

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General

Target

XWorm.exe
Size

9.1MB
MD5

76b8dd1cc4d42ceb68720da77fa05dab
SHA1

4594f0a2b104257123b72587226e0694ed410803
SHA256

7eacc3500da7eeebe2936d120ac8dbc56de6f1100b0ae77b13da5ee0850af4fb
SHA512

5d72ea084d0b611566eb7fc35e6994c5bfd475813739ca9f5909206c081179d94faf59f707c52f9cf60de44cd1a86a6796c5ed1fd51f20db2c31abec3b9d964e
SSDEEP

3072:5BZK4Q137x/2bSinOvaYA2ewhLapuvpAsZOyMqmyBeYVYm:zZlQ137xebFVc/GWGwqqm1

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

uk1.localto.net:3725

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral3/memory/2212-1-0x0000000000120000-0x0000000000158000-memory.dmp	family_xworm
behavioral3/memory/2192-36-0x00000000011E0000-0x0000000001218000-memory.dmp	family_xworm
behavioral3/memory/1560-41-0x0000000001270000-0x00000000012A8000-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
2584	powershell.exe
2636	powershell.exe
1724	powershell.exe
1428	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 5 IoCs

pid	Process
2192	svchost.exe
1788	svchost.exe
2580	svchost.exe
1560	svchost.exe
1056	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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	XWorm.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

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
1764	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2584	powershell.exe
2636	powershell.exe
1724	powershell.exe
1428	powershell.exe
2212	XWorm.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	2212	XWorm.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	2636	powershell.exe
Token: SeDebugPrivilege	1724	powershell.exe
Token: SeDebugPrivilege	1428	powershell.exe
Token: SeDebugPrivilege	2212	XWorm.exe
Token: SeDebugPrivilege	2192	svchost.exe
Token: SeDebugPrivilege	1788	svchost.exe
Token: SeDebugPrivilege	2580	svchost.exe
Token: SeDebugPrivilege	1560	svchost.exe
Token: SeDebugPrivilege	1056	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2212	XWorm.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2584	2212	XWorm.exe	32
PID 2212 wrote to memory of 2584	2212	XWorm.exe	32
PID 2212 wrote to memory of 2584	2212	XWorm.exe	32
PID 2212 wrote to memory of 2636	2212	XWorm.exe	34
PID 2212 wrote to memory of 2636	2212	XWorm.exe	34
PID 2212 wrote to memory of 2636	2212	XWorm.exe	34
PID 2212 wrote to memory of 1724	2212	XWorm.exe	36
PID 2212 wrote to memory of 1724	2212	XWorm.exe	36
PID 2212 wrote to memory of 1724	2212	XWorm.exe	36
PID 2212 wrote to memory of 1428	2212	XWorm.exe	38
PID 2212 wrote to memory of 1428	2212	XWorm.exe	38
PID 2212 wrote to memory of 1428	2212	XWorm.exe	38
PID 2212 wrote to memory of 1764	2212	XWorm.exe	40
PID 2212 wrote to memory of 1764	2212	XWorm.exe	40
PID 2212 wrote to memory of 1764	2212	XWorm.exe	40
PID 2440 wrote to memory of 2192	2440	taskeng.exe	43
PID 2440 wrote to memory of 2192	2440	taskeng.exe	43
PID 2440 wrote to memory of 2192	2440	taskeng.exe	43
PID 2440 wrote to memory of 1788	2440	taskeng.exe	44
PID 2440 wrote to memory of 1788	2440	taskeng.exe	44
PID 2440 wrote to memory of 1788	2440	taskeng.exe	44
PID 2440 wrote to memory of 2580	2440	taskeng.exe	45
PID 2440 wrote to memory of 2580	2440	taskeng.exe	45
PID 2440 wrote to memory of 2580	2440	taskeng.exe	45
PID 2440 wrote to memory of 1560	2440	taskeng.exe	46
PID 2440 wrote to memory of 1560	2440	taskeng.exe	46
PID 2440 wrote to memory of 1560	2440	taskeng.exe	46
PID 2440 wrote to memory of 1056	2440	taskeng.exe	47
PID 2440 wrote to memory of 1056	2440	taskeng.exe	47
PID 2440 wrote to memory of 1056	2440	taskeng.exe	47

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\XWorm.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2212
- 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\XWorm.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XWorm.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1724
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1428
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1764

C:\Windows\system32\taskeng.exe
taskeng.exe {4A570B88-5FBC-47ED-8F68-B24DE714F6F8} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2440
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2192
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1788
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2580
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1560
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1056

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:\ProgramData\svchost.exe

Filesize
9.1MB

MD5
76b8dd1cc4d42ceb68720da77fa05dab

SHA1
4594f0a2b104257123b72587226e0694ed410803

SHA256
7eacc3500da7eeebe2936d120ac8dbc56de6f1100b0ae77b13da5ee0850af4fb

SHA512
5d72ea084d0b611566eb7fc35e6994c5bfd475813739ca9f5909206c081179d94faf59f707c52f9cf60de44cd1a86a6796c5ed1fd51f20db2c31abec3b9d964e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\F8IUGR35I4X651OHCRV6.temp

Filesize
7KB

MD5
2eea1a95876dc3db53b7f90fa8f86821

SHA1
e0aabc94603d7f7e2d3e4187d83926242d3eb7a7

SHA256
d74d84c2d04dc6985ee1fe0288b362bf0d80b13bf8e7a118468a88fdf1e6bb23

SHA512
c71bec343000857aec9c0d4bba3bf738f31ccff8d70973694f30eb8f6df9f876f3ef4784ee65d2a1a653b76bf9d9086f66058cbb5edeb17fd2a485e67af5c373

Download Submit
memory/1560-41-0x0000000001270000-0x00000000012A8000-memory.dmp

Filesize
224KB

Download
memory/2192-36-0x00000000011E0000-0x0000000001218000-memory.dmp

Filesize
224KB

Download
memory/2212-27-0x000007FEF5173000-0x000007FEF5174000-memory.dmp

Filesize
4KB

Download
memory/2212-0-0x000007FEF5173000-0x000007FEF5174000-memory.dmp

Filesize
4KB

Download
memory/2212-32-0x000007FEF5170000-0x000007FEF5B5C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-2-0x000007FEF5170000-0x000007FEF5B5C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-1-0x0000000000120000-0x0000000000158000-memory.dmp

Filesize
224KB

Download
memory/2584-9-0x0000000001EC0000-0x0000000001EC8000-memory.dmp

Filesize
32KB

Download
memory/2584-8-0x000000001B850000-0x000000001BB32000-memory.dmp

Filesize
2.9MB

Download
memory/2584-7-0x0000000002A20000-0x0000000002AA0000-memory.dmp

Filesize
512KB

Download
memory/2636-15-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2636-16-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download