xworm | 56ef629323495497970ffe5efd4c3197bd8043825ba264b9e6294113675820ac

General

Target

X.exe
Size

44KB
MD5

d8dec448ddbb0749bbe3f4259c9bc29b
SHA1

93886a2b1c55fa6ff41ac5bce6945e601d355f8c
SHA256

56ef629323495497970ffe5efd4c3197bd8043825ba264b9e6294113675820ac
SHA512

20739296d87d15b801086a8e7478875722e83dc1fd4004e9905a1c6f8c0c8913644bcf7e5b7aecb760f4870354118fc10d218f952fcd7b204c1f0ebae4e4a400
SSDEEP

768:lFM3oVOl50FADMe/e2TSAlsUUd3FFRPG9+I6OOChwvmbW5:jMK650osOirFw9+I6OOCCui5

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:36623

fax-scenarios.gl.at.ply.gg:36623

Mutex

iq4Cbvqxc9yxmDW5

Attributes

Install_directory
%AppData%
install_file
svchost.exe

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1696-1-0x0000000000DE0000-0x0000000000DF2000-memory.dmp	family_xworm
behavioral1/files/0x0004000000004ed7-35.dat	family_xworm
behavioral1/memory/1952-37-0x00000000013E0000-0x00000000013F2000-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
2640	powershell.exe
2176	powershell.exe
2668	powershell.exe
2316	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	X.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	X.exe

Executes dropped EXE 2 IoCs

pid	Process
1952	svchost.exe
2412	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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	X.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	X.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	X.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BIOSVersion	X.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BIOSReleaseDate	X.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	X.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	X.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
2652	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2316	powershell.exe
2640	powershell.exe
2176	powershell.exe
2668	powershell.exe
1696	X.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1696	X.exe
Token: SeDebugPrivilege	2316	powershell.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	2176	powershell.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	1696	X.exe
Token: SeDebugPrivilege	1952	svchost.exe
Token: SeDebugPrivilege	2412	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1696	X.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 2316	1696	X.exe	31
PID 1696 wrote to memory of 2316	1696	X.exe	31
PID 1696 wrote to memory of 2316	1696	X.exe	31
PID 1696 wrote to memory of 2640	1696	X.exe	33
PID 1696 wrote to memory of 2640	1696	X.exe	33
PID 1696 wrote to memory of 2640	1696	X.exe	33
PID 1696 wrote to memory of 2176	1696	X.exe	35
PID 1696 wrote to memory of 2176	1696	X.exe	35
PID 1696 wrote to memory of 2176	1696	X.exe	35
PID 1696 wrote to memory of 2668	1696	X.exe	37
PID 1696 wrote to memory of 2668	1696	X.exe	37
PID 1696 wrote to memory of 2668	1696	X.exe	37
PID 1696 wrote to memory of 2652	1696	X.exe	39
PID 1696 wrote to memory of 2652	1696	X.exe	39
PID 1696 wrote to memory of 2652	1696	X.exe	39
PID 2268 wrote to memory of 1952	2268	taskeng.exe	43
PID 2268 wrote to memory of 1952	2268	taskeng.exe	43
PID 2268 wrote to memory of 1952	2268	taskeng.exe	43
PID 2268 wrote to memory of 2412	2268	taskeng.exe	45
PID 2268 wrote to memory of 2412	2268	taskeng.exe	45
PID 2268 wrote to memory of 2412	2268	taskeng.exe	45

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\X.exe
"C:\Users\Admin\AppData\Local\Temp\X.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1696
- 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\X.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2316
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'X.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2640
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2176
- 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:2668
- 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\Roaming\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2652

C:\Windows\system32\taskeng.exe
taskeng.exe {6F6DEC90-4550-4FF1-909F-581751EDAE9F} S-1-5-21-1488793075-819845221-1497111674-1000:UPNECVIU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1952
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2412

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

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
7KB

MD5
fa81bde9b0562a1f49a94650ef0ebc29

SHA1
b82692f128e06cec99fdd7011fef50c58f8922f1

SHA256
e65f4f969f8702fbacb0cd0c62d0c998621a8fe4735fc5515ea1c2569d0ba764

SHA512
67fb0c20cb45edd1a494e1824e42c5c5da5c11f9a5be252c543300ff810395fc1ff028756487f4c0219d76fade2ea8eaef8e620cd7f648380349da8df705acee

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

Filesize
44KB

MD5
d8dec448ddbb0749bbe3f4259c9bc29b

SHA1
93886a2b1c55fa6ff41ac5bce6945e601d355f8c

SHA256
56ef629323495497970ffe5efd4c3197bd8043825ba264b9e6294113675820ac

SHA512
20739296d87d15b801086a8e7478875722e83dc1fd4004e9905a1c6f8c0c8913644bcf7e5b7aecb760f4870354118fc10d218f952fcd7b204c1f0ebae4e4a400

Download Submit
memory/1696-31-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

Filesize
4KB

Download
memory/1696-1-0x0000000000DE0000-0x0000000000DF2000-memory.dmp

Filesize
72KB

Download
memory/1696-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

Filesize
4KB

Download
memory/1696-33-0x0000000000D90000-0x0000000000D9C000-memory.dmp

Filesize
48KB

Download
memory/1696-32-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/1696-30-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/1952-37-0x00000000013E0000-0x00000000013F2000-memory.dmp

Filesize
72KB

Download
memory/2316-7-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2316-8-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2316-6-0x0000000002CB0000-0x0000000002D30000-memory.dmp

Filesize
512KB

Download
memory/2640-15-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/2640-14-0x000000001B4E0000-0x000000001B7C2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads