xworm | e19bbde43b68c0b2ab107adde791a74bdfd078fc6ac88df307e6a0cbee56b1da

General

Target

XClient.exe
Size

39KB
MD5

40fd2932a64ccfd8ad76a8ce81d557d5
SHA1

3e8f86b139ffb80a5425140d5ea08e149fae1b08
SHA256

e19bbde43b68c0b2ab107adde791a74bdfd078fc6ac88df307e6a0cbee56b1da
SHA512

35ebaf198dcc9071f163d89d0913fe1c0840ce4b28c6b9b15ab5710abb60c061c09e788565a6921c04a9975a7dd187fcdc4d03b6fc51dd09f944573dd3287679
SSDEEP

768:ZBj78fx6MooHKBjJfDUbtRFH9OKi6BOMh6L05jX:b78p6MLqBjJfIbDFH93i6BOMskjX

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:14333

previous-contests.gl.at.ply.gg:14333

Mutex

GH9VJU0DztsBgWNu

Attributes

Install_directory
%AppData%
install_file
XClient.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3708-1-0x00000000003B0000-0x00000000003C0000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
3868	powershell.exe
2288	powershell.exe
4000	powershell.exe
4016	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

Processes:

XClient.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Processes:

flow	ioc
14	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	Process
4000	powershell.exe
4000	powershell.exe
4016	powershell.exe
4016	powershell.exe
3868	powershell.exe
3868	powershell.exe
2288	powershell.exe
2288	powershell.exe
3708	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	3708	XClient.exe
Token: SeDebugPrivilege	4000	powershell.exe
Token: SeDebugPrivilege	4016	powershell.exe
Token: SeDebugPrivilege	3868	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid	Process
3708	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

XClient.exe

description	pid	Process	procid_target
PID 3708 wrote to memory of 4000	3708	XClient.exe	87
PID 3708 wrote to memory of 4000	3708	XClient.exe	87
PID 3708 wrote to memory of 4016	3708	XClient.exe	89
PID 3708 wrote to memory of 4016	3708	XClient.exe	89
PID 3708 wrote to memory of 3868	3708	XClient.exe	91
PID 3708 wrote to memory of 3868	3708	XClient.exe	91
PID 3708 wrote to memory of 2288	3708	XClient.exe	93
PID 3708 wrote to memory of 2288	3708	XClient.exe	93

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3708
- 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:4000
- 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:4016
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3868
- 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:2288

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
2979eabc783eaca50de7be23dd4eafcf

SHA1
d709ce5f3a06b7958a67e20870bfd95b83cad2ea

SHA256
006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903

SHA512
92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

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

Filesize
944B

MD5
e3161f4edbc9b963debe22e29658050b

SHA1
45dbf88dadafe5dd1cfee1e987c8a219d3208cdb

SHA256
1359d6daeaed2f254b162914203c891b23139cc236a3bf75c2dfcbe26265c84a

SHA512
006ffb8f37d1f77f8ee79b22ffa413819f565d62773c632b70985759572121c6ab4743139d16d885f8c0ff9d0e0b136686741728b3e142ee54aea3bb733dffb2

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

Filesize
944B

MD5
98baf5117c4fcec1692067d200c58ab3

SHA1
5b33a57b72141e7508b615e17fb621612cb8e390

SHA256
30bf8496e9a08f4fdfe4767abcd565f92b6da06ca1c7823a70cb7cab16262e51

SHA512
344a70bfc037d54176f12db91f05bf4295bb587a5062fd1febe6f52853571170bd8ef6042cb87b893185bbae1937cf77b679d7970f8cc1c2666b0b7c1b32987d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_40czlnhb.iis.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3708-1-0x00000000003B0000-0x00000000003C0000-memory.dmp

Filesize
64KB

Download
memory/3708-2-0x00007FFF26BA0000-0x00007FFF27661000-memory.dmp

Filesize
10.8MB

Download
memory/3708-0-0x00007FFF26BA3000-0x00007FFF26BA5000-memory.dmp

Filesize
8KB

Download
memory/3708-57-0x00007FFF26BA0000-0x00007FFF27661000-memory.dmp

Filesize
10.8MB

Download
memory/4000-3-0x00007FFF26BA0000-0x00007FFF27661000-memory.dmp

Filesize
10.8MB

Download
memory/4000-18-0x00007FFF26BA0000-0x00007FFF27661000-memory.dmp

Filesize
10.8MB

Download
memory/4000-15-0x00007FFF26BA0000-0x00007FFF27661000-memory.dmp

Filesize
10.8MB

Download
memory/4000-14-0x00000268CFCF0000-0x00000268CFD12000-memory.dmp

Filesize
136KB

Download
memory/4000-4-0x00007FFF26BA0000-0x00007FFF27661000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads