xworm | cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c

General

Target

XClient.exe
Size

76KB
MD5

20e1e5e3bbf0a01a30941cc12733c2da
SHA1

fced9d178bb03d5ed6bc2b0dc57befd9baed0e08
SHA256

cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c
SHA512

3642ca896b7fa00baf455d0764326ca6b8dab6d66bc743af8903c3937acfee7462b7964f98d340285edf3810c1f982a36f4911d7c74ab4ed8d5e8f4612feda12
SSDEEP

1536:5nstrkdd0P9rvnau2jsw84fP+uNu9b1KES9o//6U5VOHUQu5n+x:Kto+rCd2l9b1Kty5XOHU5+x

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

193.161.193.99:1194

Attributes

Install_directory
%AppData%
install_file
USB.exe
telegram
https://api.telegram.org/bot7704029346:AAHPre1lXQa0UfPCpOUXJZ9UXA9mFxvH4Gk/sendMessage?chat_id=7590668020

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2252-1-0x0000000000FC0000-0x0000000000FDA000-memory.dmp	family_xworm
behavioral1/files/0x000900000001211a-33.dat	family_xworm
behavioral1/memory/2076-35-0x0000000000ED0000-0x0000000000EEA000-memory.dmp	family_xworm
behavioral1/memory/2164-38-0x0000000001340000-0x000000000135A000-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
2556	powershell.exe
672	powershell.exe
2768	powershell.exe
2832	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2076	security
2164	security
1968	security

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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\security = "C:\\Users\\Admin\\AppData\\Roaming\\security"	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
1048	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2252	XClient.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2768	powershell.exe
2832	powershell.exe
2556	powershell.exe
672	powershell.exe
2252	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	XClient.exe
Token: SeDebugPrivilege	2768	powershell.exe
Token: SeDebugPrivilege	2832	powershell.exe
Token: SeDebugPrivilege	2556	powershell.exe
Token: SeDebugPrivilege	672	powershell.exe
Token: SeDebugPrivilege	2252	XClient.exe
Token: SeDebugPrivilege	2076	security
Token: SeDebugPrivilege	2164	security
Token: SeDebugPrivilege	1968	security

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2252	XClient.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2768	2252	XClient.exe	30
PID 2252 wrote to memory of 2768	2252	XClient.exe	30
PID 2252 wrote to memory of 2768	2252	XClient.exe	30
PID 2252 wrote to memory of 2832	2252	XClient.exe	32
PID 2252 wrote to memory of 2832	2252	XClient.exe	32
PID 2252 wrote to memory of 2832	2252	XClient.exe	32
PID 2252 wrote to memory of 2556	2252	XClient.exe	34
PID 2252 wrote to memory of 2556	2252	XClient.exe	34
PID 2252 wrote to memory of 2556	2252	XClient.exe	34
PID 2252 wrote to memory of 672	2252	XClient.exe	36
PID 2252 wrote to memory of 672	2252	XClient.exe	36
PID 2252 wrote to memory of 672	2252	XClient.exe	36
PID 2252 wrote to memory of 1048	2252	XClient.exe	38
PID 2252 wrote to memory of 1048	2252	XClient.exe	38
PID 2252 wrote to memory of 1048	2252	XClient.exe	38
PID 444 wrote to memory of 2076	444	taskeng.exe	42
PID 444 wrote to memory of 2076	444	taskeng.exe	42
PID 444 wrote to memory of 2076	444	taskeng.exe	42
PID 444 wrote to memory of 2164	444	taskeng.exe	43
PID 444 wrote to memory of 2164	444	taskeng.exe	43
PID 444 wrote to memory of 2164	444	taskeng.exe	43
PID 444 wrote to memory of 1968	444	taskeng.exe	44
PID 444 wrote to memory of 1968	444	taskeng.exe	44
PID 444 wrote to memory of 1968	444	taskeng.exe	44

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: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2252
- 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:2768
- 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:2832
- 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\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:672
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "security" /tr "C:\Users\Admin\AppData\Roaming\security"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1048

C:\Windows\system32\taskeng.exe
taskeng.exe {FC0E6BF2-1288-4D66-AA49-1919E9411F1A} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:444
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2076
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2164
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1968

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
762589554396dbaf9359a968bd7e41d8

SHA1
453a17e730a1d3438cec08b46d62ae13d5a8afcb

SHA256
89822ca630bd4627d4cc1de654800acd860a8595a89566c5d7483d65a25a7583

SHA512
d368070592fd628f750ab6d97978b1caa3932e7f2062ee54cb1096da662b32ebbef479794d89a9492d8e51d738fee6f8ebd0f835c6a4bd7776f1fcc15ecf7aa5

Download Submit
C:\Users\Admin\AppData\Roaming\security

Filesize
76KB

MD5
20e1e5e3bbf0a01a30941cc12733c2da

SHA1
fced9d178bb03d5ed6bc2b0dc57befd9baed0e08

SHA256
cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c

SHA512
3642ca896b7fa00baf455d0764326ca6b8dab6d66bc743af8903c3937acfee7462b7964f98d340285edf3810c1f982a36f4911d7c74ab4ed8d5e8f4612feda12

Download Submit
memory/2076-35-0x0000000000ED0000-0x0000000000EEA000-memory.dmp

Filesize
104KB

Download
memory/2164-38-0x0000000001340000-0x000000000135A000-memory.dmp

Filesize
104KB

Download
memory/2252-30-0x000007FEF5783000-0x000007FEF5784000-memory.dmp

Filesize
4KB

Download
memory/2252-1-0x0000000000FC0000-0x0000000000FDA000-memory.dmp

Filesize
104KB

Download
memory/2252-0-0x000007FEF5783000-0x000007FEF5784000-memory.dmp

Filesize
4KB

Download
memory/2252-31-0x000000001B250000-0x000000001B2D0000-memory.dmp

Filesize
512KB

Download
memory/2252-29-0x000000001B250000-0x000000001B2D0000-memory.dmp

Filesize
512KB

Download
memory/2768-7-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2768-8-0x0000000000680000-0x0000000000688000-memory.dmp

Filesize
32KB

Download
memory/2768-6-0x0000000002A00000-0x0000000002A80000-memory.dmp

Filesize
512KB

Download
memory/2832-15-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2832-14-0x000000001B600000-0x000000001B8E2000-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