xworm | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

max time kernel
1798s
max time network
1805s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10-05-2024 18:05

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General

Target

RAT/XClient.exe
Size

172KB
MD5

75ba783757c5b61bd841afa136fc3eda
SHA1

8db9cda9508471a23f9b743027fa115e01bc1fe1
SHA256

75a8719e83e4aecbe51287d7bfaf1e334fa190c7784324f24bcf61ab984de20a
SHA512

9a6cfbf4302336662527837bf60b30b458f8d438bd6e9563093d4948bf81c79d56578e965d836e90aafde553d1cdc9c6df81a254aafcfb3379fbe6405dce0ea1
SSDEEP

1536:vJcr5kCyoAp30kaF6CiJzt7UbjFdZe8e6TOAJkU7JsOpysa7iAMI:BcmNNxda6zZUbjHZe8jO6H2OpYuAf

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/2jTT3Lnj

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral4/memory/772-1-0x0000000000890000-0x00000000008C0000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
1276	powershell.exe
5084	powershell.exe
4968	powershell.exe
4592	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 30 IoCs

Web Service

T1102

flow	ioc
96	7.tcp.eu.ngrok.io
139	7.tcp.eu.ngrok.io
17	pastebin.com
197	7.tcp.eu.ngrok.io
18	pastebin.com
57	7.tcp.eu.ngrok.io
88	7.tcp.eu.ngrok.io
189	7.tcp.eu.ngrok.io
248	7.tcp.eu.ngrok.io
20	7.tcp.eu.ngrok.io
115	7.tcp.eu.ngrok.io
147	7.tcp.eu.ngrok.io
165	7.tcp.eu.ngrok.io
173	7.tcp.eu.ngrok.io
79	7.tcp.eu.ngrok.io
226	7.tcp.eu.ngrok.io
123	7.tcp.eu.ngrok.io
159	7.tcp.eu.ngrok.io
241	7.tcp.eu.ngrok.io
219	7.tcp.eu.ngrok.io
44	7.tcp.eu.ngrok.io
64	7.tcp.eu.ngrok.io
72	7.tcp.eu.ngrok.io
106	7.tcp.eu.ngrok.io
182	7.tcp.eu.ngrok.io
206	7.tcp.eu.ngrok.io
212	7.tcp.eu.ngrok.io
132	7.tcp.eu.ngrok.io
154	7.tcp.eu.ngrok.io
233	7.tcp.eu.ngrok.io

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

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

pid	Process
5084	powershell.exe
5084	powershell.exe
4968	powershell.exe
4968	powershell.exe
4592	powershell.exe
4592	powershell.exe
1276	powershell.exe
1276	powershell.exe
772	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	772	XClient.exe
Token: SeDebugPrivilege	5084	powershell.exe
Token: SeDebugPrivilege	4968	powershell.exe
Token: SeDebugPrivilege	4592	powershell.exe
Token: SeDebugPrivilege	1276	powershell.exe
Token: SeDebugPrivilege	772	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
772	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 772 wrote to memory of 5084	772	XClient.exe	89
PID 772 wrote to memory of 5084	772	XClient.exe	89
PID 772 wrote to memory of 4968	772	XClient.exe	91
PID 772 wrote to memory of 4968	772	XClient.exe	91
PID 772 wrote to memory of 4592	772	XClient.exe	93
PID 772 wrote to memory of 4592	772	XClient.exe	93
PID 772 wrote to memory of 1276	772	XClient.exe	95
PID 772 wrote to memory of 1276	772	XClient.exe	95

C:\Users\Admin\AppData\Local\Temp\RAT\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\RAT\XClient.exe"
1⤵
- Checks computer location settings
- 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:772
- 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\RAT\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5084
- 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:4968
- 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:4592
- 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:1276

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

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

Filesize
944B

MD5
2d06ce10e4e5b9e174b5ebbdad300fad

SHA1
bcc1c231e22238cef02ae25331320060ada2f131

SHA256
87d1dd56f12a88907ba5aebca8d555443d6f77ed214497277cc8bcd31c669f2c

SHA512
38cfbeb59605854ae4fcfae8619a6b26bd916148acfb5636383672a3960b45ca41fed5c241f97465129e92eaf78c4c85dcf258f1ab501a2bf771287ce04f76a7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_crn3hhex.wsu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/772-62-0x00007FF815FF0000-0x00007FF816AB1000-memory.dmp

Filesize
10.8MB

Download
memory/772-61-0x00007FF815FF3000-0x00007FF815FF5000-memory.dmp

Filesize
8KB

Download
memory/772-0-0x00007FF815FF3000-0x00007FF815FF5000-memory.dmp

Filesize
8KB

Download
memory/772-2-0x00007FF815FF0000-0x00007FF816AB1000-memory.dmp

Filesize
10.8MB

Download
memory/772-1-0x0000000000890000-0x00000000008C0000-memory.dmp

Filesize
192KB

Download
memory/1276-56-0x00000200E1190000-0x00000200E12FA000-memory.dmp

Filesize
1.4MB

Download
memory/4592-44-0x0000023868D40000-0x0000023868F5C000-memory.dmp

Filesize
2.1MB

Download
memory/4968-32-0x0000028650840000-0x0000028650A5C000-memory.dmp

Filesize
2.1MB

Download
memory/5084-4-0x00007FF815FF0000-0x00007FF816AB1000-memory.dmp

Filesize
10.8MB

Download
memory/5084-19-0x00007FF815FF0000-0x00007FF816AB1000-memory.dmp

Filesize
10.8MB

Download
memory/5084-18-0x00000217F7550000-0x00000217F76BA000-memory.dmp

Filesize
1.4MB

Download
memory/5084-15-0x00007FF815FF0000-0x00007FF816AB1000-memory.dmp

Filesize
10.8MB

Download
memory/5084-14-0x00000217F6AC0000-0x00000217F6AE2000-memory.dmp

Filesize
136KB

Download
memory/5084-3-0x00007FF815FF0000-0x00007FF816AB1000-memory.dmp

Filesize
10.8MB

Download