xworm | 4584e840367c8990cb040f840d4e6af35424e3ab7618985bfc76190757eae2a2

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 1 IoCs

resource	yara_rule
behavioral4/memory/3548-1-0x0000000000E50000-0x0000000000E88000-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
2684	powershell.exe
1140	powershell.exe
3568	powershell.exe
4576	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	XWorm.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	XWorm.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XWorm.exe

Executes dropped EXE 5 IoCs

pid	Process
2752	svchost.exe
4948	svchost.exe
4896	svchost.exe
3952	svchost.exe
1776	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-1-5-21-2718105630-359604950-2820636825-1000\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
11	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
4756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4576	powershell.exe
4576	powershell.exe
2684	powershell.exe
2684	powershell.exe
1140	powershell.exe
1140	powershell.exe
3568	powershell.exe
3568	powershell.exe
3548	XWorm.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	3548	XWorm.exe
Token: SeDebugPrivilege	4576	powershell.exe
Token: SeDebugPrivilege	2684	powershell.exe
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeDebugPrivilege	3568	powershell.exe
Token: SeDebugPrivilege	3548	XWorm.exe
Token: SeDebugPrivilege	2752	svchost.exe
Token: SeDebugPrivilege	4948	svchost.exe
Token: SeDebugPrivilege	4896	svchost.exe
Token: SeDebugPrivilege	3952	svchost.exe
Token: SeDebugPrivilege	1776	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3548	XWorm.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3548 wrote to memory of 4576	3548	XWorm.exe	87
PID 3548 wrote to memory of 4576	3548	XWorm.exe	87
PID 3548 wrote to memory of 2684	3548	XWorm.exe	89
PID 3548 wrote to memory of 2684	3548	XWorm.exe	89
PID 3548 wrote to memory of 1140	3548	XWorm.exe	91
PID 3548 wrote to memory of 1140	3548	XWorm.exe	91
PID 3548 wrote to memory of 3568	3548	XWorm.exe	93
PID 3548 wrote to memory of 3568	3548	XWorm.exe	93
PID 3548 wrote to memory of 4756	3548	XWorm.exe	97
PID 3548 wrote to memory of 4756	3548	XWorm.exe	97

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⤵
- Checks computer location settings
- 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:3548
- 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:4576
- 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:2684
- 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:1140
- 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:3568
- 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:4756

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2752

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4948

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4896

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3952

C:\ProgramData\svchost.exe
C:\ProgramData\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1776

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

2

T1012

System Information Discovery

2

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
9c172d22fbbdafe12dfc5c909edea107

SHA1
9961cfc5a51f1d375186fc64bf98214bdc0cf2df

SHA256
315439a1131019ecb316a0344395624965a961baff563be19221620e6e3dc18d

SHA512
d459ca5a3abd05b5bff39056065e786eec0260cb83b03c774ab0b98f07dfc8ef7dd5db5f37c569ac0d531ebd640c6dc0aaefc407d357280e07b011e982b91e2d

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
35c0dd6b7297ce23b5f0f71be4717641

SHA1
f131d8a22859c147066fc351a7033cb72b119af0

SHA256
dbda1afb665f8ffebc77ebf8c5aa6b34005b45d2f69b9bebc80e101798b3d187

SHA512
c608f32d51046446a0f581138ea3915e5f09be6465538b4860099ce9fb4ba1b28c152fd756552a76b3efd21e7f6f55327b0aad11beb036b9567b01ffc657f03c

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

Filesize
944B

MD5
21643a4d156ecab7dc5310237c59ea25

SHA1
a67c19d36b0206e248fe5cda1be83264c11868f5

SHA256
2683eb556df64c8cd20a74c4647843b44afbc53ec049f8512af5d2e456dc4780

SHA512
399a359683007c7da871fd5a4d491e49eed5a3112650b51bf51c5cb5a9889114d94b496241efc7b0a1586315188232839583ad5d022504f764eee1a73093a041

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sxchne2u.bqo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3548-0-0x00007FFDB7253000-0x00007FFDB7255000-memory.dmp

Filesize
8KB

Download
memory/3548-53-0x00007FFDB7253000-0x00007FFDB7255000-memory.dmp

Filesize
8KB

Download
memory/3548-58-0x00007FFDB7250000-0x00007FFDB7D11000-memory.dmp

Filesize
10.8MB

Download
memory/3548-2-0x00007FFDB7250000-0x00007FFDB7D11000-memory.dmp

Filesize
10.8MB

Download
memory/3548-1-0x0000000000E50000-0x0000000000E88000-memory.dmp

Filesize
224KB

Download
memory/4576-15-0x00007FFDB7250000-0x00007FFDB7D11000-memory.dmp

Filesize
10.8MB

Download
memory/4576-18-0x00007FFDB7250000-0x00007FFDB7D11000-memory.dmp

Filesize
10.8MB

Download
memory/4576-14-0x00007FFDB7250000-0x00007FFDB7D11000-memory.dmp

Filesize
10.8MB

Download
memory/4576-13-0x00000199B1920000-0x00000199B1942000-memory.dmp

Filesize
136KB

Download
memory/4576-3-0x00007FFDB7250000-0x00007FFDB7D11000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads