xworm | 77b137f35801187a1a535c39b3b5dd78c230162b340e4aaadfb257436ac49f0a

General

Target

XClient.exe
Size

79KB
MD5

e75cd40b330ca27c53ad8adefa31945c
SHA1

09c81abe659f3c5878414034da93abe594db6d94
SHA256

77b137f35801187a1a535c39b3b5dd78c230162b340e4aaadfb257436ac49f0a
SHA512

434df96dd9fdb74aa9f312ed72534c96685afb405c7553ece45efd4a4a4fd5e9bd4a551eb37058098a9633c4ef7c187e2e8525c6e0a5b00fc706f11a257aad13
SSDEEP

1536:ll6VVj22yBq/RVoRWJ11bvEEHK7M6hOApu17y2in+x:GjXBJ11bvK73OApu5yd+x

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

12345555.openvpn.com:4444

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/3028-1-0x00000000003D0000-0x00000000003EA000-memory.dmp	family_xworm
behavioral1/files/0x000d000000012282-34.dat	family_xworm
behavioral1/memory/2820-36-0x0000000000BC0000-0x0000000000BDA000-memory.dmp	family_xworm
behavioral1/memory/3020-41-0x0000000000D80000-0x0000000000D9A000-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
2592	powershell.exe
1476	powershell.exe
2644	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2820	security
1748	security
3020	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
2132	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3028	XClient.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2644	powershell.exe
2640	powershell.exe
2592	powershell.exe
1476	powershell.exe
3028	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3028	XClient.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	1476	powershell.exe
Token: SeDebugPrivilege	3028	XClient.exe
Token: SeDebugPrivilege	2820	security
Token: SeDebugPrivilege	1748	security
Token: SeDebugPrivilege	3020	security

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3028	XClient.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 2644	3028	XClient.exe	31
PID 3028 wrote to memory of 2644	3028	XClient.exe	31
PID 3028 wrote to memory of 2644	3028	XClient.exe	31
PID 3028 wrote to memory of 2640	3028	XClient.exe	33
PID 3028 wrote to memory of 2640	3028	XClient.exe	33
PID 3028 wrote to memory of 2640	3028	XClient.exe	33
PID 3028 wrote to memory of 2592	3028	XClient.exe	35
PID 3028 wrote to memory of 2592	3028	XClient.exe	35
PID 3028 wrote to memory of 2592	3028	XClient.exe	35
PID 3028 wrote to memory of 1476	3028	XClient.exe	37
PID 3028 wrote to memory of 1476	3028	XClient.exe	37
PID 3028 wrote to memory of 1476	3028	XClient.exe	37
PID 3028 wrote to memory of 2132	3028	XClient.exe	39
PID 3028 wrote to memory of 2132	3028	XClient.exe	39
PID 3028 wrote to memory of 2132	3028	XClient.exe	39
PID 812 wrote to memory of 2820	812	taskeng.exe	43
PID 812 wrote to memory of 2820	812	taskeng.exe	43
PID 812 wrote to memory of 2820	812	taskeng.exe	43
PID 812 wrote to memory of 1748	812	taskeng.exe	44
PID 812 wrote to memory of 1748	812	taskeng.exe	44
PID 812 wrote to memory of 1748	812	taskeng.exe	44
PID 812 wrote to memory of 3020	812	taskeng.exe	46
PID 812 wrote to memory of 3020	812	taskeng.exe	46
PID 812 wrote to memory of 3020	812	taskeng.exe	46

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:3028
- 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:2644
- 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: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\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2592
- 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:1476
- 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:2132

C:\Windows\system32\taskeng.exe
taskeng.exe {32ED9521-67AD-4B6F-9092-578A02B5F021} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:812
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2820
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1748
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3020

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\W0T4UVOL5G312FEYQQ1D.temp

Filesize
7KB

MD5
db25693ef815f78bc4e10e4262a97c94

SHA1
6a56f44db7acc3a7c5708f62b741401d9627cecc

SHA256
ef96f5e44d1853576995fe937a159dbd02a0b3b9f4601c05f7179ae3cf90c4a7

SHA512
f490846588b106389dfb1380416113b0c02cb520b460812044e0784f4006435c3daaec8f4b480e998858978a3f4747908df38a58489ce634d1972b07665ebd1d

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

Filesize
79KB

MD5
e75cd40b330ca27c53ad8adefa31945c

SHA1
09c81abe659f3c5878414034da93abe594db6d94

SHA256
77b137f35801187a1a535c39b3b5dd78c230162b340e4aaadfb257436ac49f0a

SHA512
434df96dd9fdb74aa9f312ed72534c96685afb405c7553ece45efd4a4a4fd5e9bd4a551eb37058098a9633c4ef7c187e2e8525c6e0a5b00fc706f11a257aad13

Download Submit
memory/2640-15-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download
memory/2640-14-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/2644-7-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2644-8-0x0000000002070000-0x0000000002078000-memory.dmp

Filesize
32KB

Download
memory/2644-6-0x0000000002950000-0x00000000029D0000-memory.dmp

Filesize
512KB

Download
memory/2820-36-0x0000000000BC0000-0x0000000000BDA000-memory.dmp

Filesize
104KB

Download
memory/3020-41-0x0000000000D80000-0x0000000000D9A000-memory.dmp

Filesize
104KB

Download
memory/3028-0-0x000007FEF4E13000-0x000007FEF4E14000-memory.dmp

Filesize
4KB

Download
memory/3028-31-0x000000001B180000-0x000000001B200000-memory.dmp

Filesize
512KB

Download
memory/3028-32-0x000007FEF4E13000-0x000007FEF4E14000-memory.dmp

Filesize
4KB

Download
memory/3028-1-0x00000000003D0000-0x00000000003EA000-memory.dmp

Filesize
104KB

Download
memory/3028-37-0x000000001B180000-0x000000001B200000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads