xworm | 628619bc0cc92b18ec67bd63c723b9aec1e50ab5ed8bfdd069e40d02fba9b1f3

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

C2

uk1.localto.net:3725

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 3 IoCs

Processes:

resource	yara_rule
behavioral3/memory/2592-1-0x0000000000D80000-0x0000000000DB8000-memory.dmp	family_xworm
behavioral3/memory/2360-36-0x0000000001280000-0x00000000012B8000-memory.dmp	family_xworm
behavioral3/memory/1888-43-0x0000000001310000-0x0000000001348000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

2724 powershell.exe
2784 powershell.exe
2980 powershell.exe
2648 powershell.exe

pid	process
2724	powershell.exe
2784	powershell.exe
2980	powershell.exe
2648	powershell.exe

Drops startup file 2 IoCs

Processes:

XWorm.exe

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

Processes:

svchost.exesvchost.exesvchost.exesvchost.exesvchost.exe

pid process

2360 svchost.exe
1048 svchost.exe
968 svchost.exe
2404 svchost.exe
1888 svchost.exe

pid	process
2360	svchost.exe
1048	svchost.exe
968	svchost.exe
2404	svchost.exe
1888	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XWorm.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\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.

Processes:

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

Processes:

schtasks.exe

pid process

1912 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXWorm.exe

pid process

2724 powershell.exe
2784 powershell.exe
2980 powershell.exe
2648 powershell.exe
2592 XWorm.exe

flow	ioc
4	ip-api.com

pid	process
1912	schtasks.exe

pid	process
2724	powershell.exe
2784	powershell.exe
2980	powershell.exe
2648	powershell.exe
2592	XWorm.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

Processes:

XWorm.exepowershell.exepowershell.exepowershell.exepowershell.exesvchost.exesvchost.exesvchost.exesvchost.exesvchost.exe

description	pid	process
Token: SeDebugPrivilege	2592	XWorm.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	2784	powershell.exe
Token: SeDebugPrivilege	2980	powershell.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	2592	XWorm.exe
Token: SeDebugPrivilege	2360	svchost.exe
Token: SeDebugPrivilege	1048	svchost.exe
Token: SeDebugPrivilege	968	svchost.exe
Token: SeDebugPrivilege	2404	svchost.exe
Token: SeDebugPrivilege	1888	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XWorm.exe

pid process

2592 XWorm.exe

pid	process
2592	XWorm.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

XWorm.exetaskeng.exe

description	pid	process	target process
PID 2592 wrote to memory of 2724	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2724	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2724	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2784	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2784	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2784	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2980	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2980	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2980	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2648	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2648	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 2648	2592	XWorm.exe	powershell.exe
PID 2592 wrote to memory of 1912	2592	XWorm.exe	schtasks.exe
PID 2592 wrote to memory of 1912	2592	XWorm.exe	schtasks.exe
PID 2592 wrote to memory of 1912	2592	XWorm.exe	schtasks.exe
PID 2932 wrote to memory of 2360	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 2360	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 2360	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 1048	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 1048	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 1048	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 968	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 968	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 968	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 2404	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 2404	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 2404	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 1888	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 1888	2932	taskeng.exe	svchost.exe
PID 2932 wrote to memory of 1888	2932	taskeng.exe	svchost.exe

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:2592
- 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:2724
- 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:2784
- 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:2980
- 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:2648
- 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:1912

C:\Windows\system32\taskeng.exe
taskeng.exe {ECFF9D64-E51E-4650-8814-3E9D8837A727} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2932
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2360
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1048
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:968
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2404
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1888

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:\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\KNKLSZ0RGOX07NJRSD8I.temp

Filesize
7KB

MD5
17e59862f28a5db8c47faae1893bfa65

SHA1
53b580b89c9ecda8022c630903f1d9e69f284a23

SHA256
d06b592bba14d5a99450639ffd6e9c223cb64240031a59dc95b929de4737a16c

SHA512
6b56dab93ec843295c8ce072d64bc0a084a94024dc5e0541715f3ec2072a11de68620d50768cd83f65945a563a6cca8fe2f878d582e06083400d08fd2c08e19b

Download Submit
\??\PIPE\srvsvc

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/1888-43-0x0000000001310000-0x0000000001348000-memory.dmp

Filesize
224KB

Download
memory/2360-36-0x0000000001280000-0x00000000012B8000-memory.dmp

Filesize
224KB

Download
memory/2592-28-0x000007FEF5EC3000-0x000007FEF5EC4000-memory.dmp

Filesize
4KB

Download
memory/2592-1-0x0000000000D80000-0x0000000000DB8000-memory.dmp

Filesize
224KB

Download
memory/2592-2-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download
memory/2592-0-0x000007FEF5EC3000-0x000007FEF5EC4000-memory.dmp

Filesize
4KB

Download
memory/2592-37-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download
memory/2724-7-0x00000000029B0000-0x0000000002A30000-memory.dmp

Filesize
512KB

Download
memory/2724-9-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2724-8-0x000000001B810000-0x000000001BAF2000-memory.dmp

Filesize
2.9MB

Download
memory/2784-16-0x0000000001E40000-0x0000000001E48000-memory.dmp

Filesize
32KB

Download
memory/2784-15-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads