xworm | a973208f7dff8f3ef5777da04f73415801f2f2ded3ea44077ca9a695a7965d66

General

Target

XClient.exe
Size

64KB
MD5

1ff6154dbcb71d60e924548345b984da
SHA1

075b5dbfbe99a2bc6e01db6c831a06878ff5cfbe
SHA256

a973208f7dff8f3ef5777da04f73415801f2f2ded3ea44077ca9a695a7965d66
SHA512

7bee117cdec90e0a1a7efa62679423d70b585e8d5de6f54a44241e4a44bca789d2c3eeebe85112bf88688e40abd3511308d0c2c6d3c42f69575e156d569ef2e3
SSDEEP

1536:LdUF8CEWGeTI9jApgc+bMuWGZnJ8p6uovO9bkMx:9WHI9Epgc+bMubJ8QvO9bHx

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

adrianmoritoru-34347.portmap.io:7000

192.168.150.131:7000

Attributes

Install_directory
%Userprofile%
install_file
injector.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2500-1-0x0000000000C50000-0x0000000000C66000-memory.dmp	family_xworm
behavioral1/files/0x000e000000012263-37.dat	family_xworm
behavioral1/memory/1192-39-0x00000000013C0000-0x00000000013D6000-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
2948	powershell.exe
2704	powershell.exe
2708	powershell.exe
2740	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1192	injector.exe
336	injector.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\injector = "C:\\Users\\Admin\\injector.exe"	XClient.exe

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
3012	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2948	powershell.exe
2704	powershell.exe
2708	powershell.exe
2740	powershell.exe
2500	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2500	XClient.exe
Token: SeDebugPrivilege	2948	powershell.exe
Token: SeDebugPrivilege	2704	powershell.exe
Token: SeDebugPrivilege	2708	powershell.exe
Token: SeDebugPrivilege	2740	powershell.exe
Token: SeDebugPrivilege	2500	XClient.exe
Token: SeDebugPrivilege	1192	injector.exe
Token: SeDebugPrivilege	336	injector.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2500	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 2948	2500	XClient.exe	30
PID 2500 wrote to memory of 2948	2500	XClient.exe	30
PID 2500 wrote to memory of 2948	2500	XClient.exe	30
PID 2500 wrote to memory of 2704	2500	XClient.exe	32
PID 2500 wrote to memory of 2704	2500	XClient.exe	32
PID 2500 wrote to memory of 2704	2500	XClient.exe	32
PID 2500 wrote to memory of 2708	2500	XClient.exe	34
PID 2500 wrote to memory of 2708	2500	XClient.exe	34
PID 2500 wrote to memory of 2708	2500	XClient.exe	34
PID 2500 wrote to memory of 2740	2500	XClient.exe	36
PID 2500 wrote to memory of 2740	2500	XClient.exe	36
PID 2500 wrote to memory of 2740	2500	XClient.exe	36
PID 2500 wrote to memory of 3012	2500	XClient.exe	38
PID 2500 wrote to memory of 3012	2500	XClient.exe	38
PID 2500 wrote to memory of 3012	2500	XClient.exe	38
PID 2504 wrote to memory of 1192	2504	taskeng.exe	42
PID 2504 wrote to memory of 1192	2504	taskeng.exe	42
PID 2504 wrote to memory of 1192	2504	taskeng.exe	42
PID 2504 wrote to memory of 336	2504	taskeng.exe	43
PID 2504 wrote to memory of 336	2504	taskeng.exe	43
PID 2504 wrote to memory of 336	2504	taskeng.exe	43

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.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:2500
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2948
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2704
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2708
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2740
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "injector" /tr "C:\Users\Admin\injector.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3012

C:\Windows\system32\taskeng.exe
taskeng.exe {52B67B2F-50E5-486E-B2B7-187E08355860} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Users\Admin\injector.exe
  C:\Users\Admin\injector.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1192
- C:\Users\Admin\injector.exe
  C:\Users\Admin\injector.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:336

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

Filesize
7KB

MD5
bc8095ac04af420e2cd3684546dbf9e8

SHA1
ab205e73fcf82758949e62d26687be671f341596

SHA256
be001adb1b3a434517905ae200b1cb579744b1a4539720a9d21c90a62fe8de5c

SHA512
961ea7a7b56215ece0533cc5e2aa5bdc3541063baa9f65aec76aa997247b545f8e0e0728169f0b577d3481ae7398236021dac41a8adc4843ce93498ac46c9226

Download Submit
C:\Users\Admin\injector.exe

Filesize
64KB

MD5
1ff6154dbcb71d60e924548345b984da

SHA1
075b5dbfbe99a2bc6e01db6c831a06878ff5cfbe

SHA256
a973208f7dff8f3ef5777da04f73415801f2f2ded3ea44077ca9a695a7965d66

SHA512
7bee117cdec90e0a1a7efa62679423d70b585e8d5de6f54a44241e4a44bca789d2c3eeebe85112bf88688e40abd3511308d0c2c6d3c42f69575e156d569ef2e3

Download Submit
memory/1192-39-0x00000000013C0000-0x00000000013D6000-memory.dmp

Filesize
88KB

Download
memory/2500-32-0x000000001B210000-0x000000001B290000-memory.dmp

Filesize
512KB

Download
memory/2500-1-0x0000000000C50000-0x0000000000C66000-memory.dmp

Filesize
88KB

Download
memory/2500-34-0x000000001B210000-0x000000001B290000-memory.dmp

Filesize
512KB

Download
memory/2500-33-0x000007FEF5C13000-0x000007FEF5C14000-memory.dmp

Filesize
4KB

Download
memory/2500-0-0x000007FEF5C13000-0x000007FEF5C14000-memory.dmp

Filesize
4KB

Download
memory/2704-15-0x0000000002100000-0x0000000002108000-memory.dmp

Filesize
32KB

Download
memory/2704-14-0x000000001B4A0000-0x000000001B782000-memory.dmp

Filesize
2.9MB

Download
memory/2948-8-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/2948-7-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2948-6-0x0000000002D70000-0x0000000002DF0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads