xworm | c9c4abd3b029e4afafec56a5ee940b4d14444d27c9b0da4794b3cfe047236695

General

Target

XClient.exe
Size

140KB
MD5

ba590e758bf7f43c86ddc06f39dd2347
SHA1

f4acbb1bdee1e31f4430af059a67cd136491a60e
SHA256

c9c4abd3b029e4afafec56a5ee940b4d14444d27c9b0da4794b3cfe047236695
SHA512

17e46beb2d57acc1f9f4a9c959d2f9fadb53158a6a02bd93eece88099655f8246a6cf325c8853e7e45b3b002fdc76c3a528f1972d6674ef883670ebe3244b2d6
SSDEEP

3072:0G/pS61n7sEbZVnJbkLiITO2DIqmyBer:0x6hoEbv5UIqm

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/PG3MaVGP

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2156-0-0x0000000000AB0000-0x0000000000AD8000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\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 2 IoCs

Web Service
T1102

Processes:

flow ioc

6 pastebin.com
7 pastebin.com
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

4 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 5 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid process

2640 powershell.exe
2556 powershell.exe
2940 powershell.exe
2620 powershell.exe
2156 XClient.exe

flow	ioc
6	pastebin.com
7	pastebin.com

flow	ioc
4	ip-api.com

pid	process
2640	powershell.exe
2556	powershell.exe
2940	powershell.exe
2620	powershell.exe
2156	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2156	XClient.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	2556	powershell.exe
Token: SeDebugPrivilege	2940	powershell.exe
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeDebugPrivilege	2156	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

2156 XClient.exe

pid	process
2156	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 2156 wrote to memory of 2640	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2640	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2640	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2556	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2556	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2556	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2940	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2940	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2940	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2620	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2620	2156	XClient.exe	powershell.exe
PID 2156 wrote to memory of 2620	2156	XClient.exe	powershell.exe

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:2156

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⤵
- 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 -ExclusionProcess 'XClient.exe'
2⤵
- 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 -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2940

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
62196d5707dc9590913287d2a3927c19

SHA1
4db1c456703c2c45a1cdf452394489eb71beea59

SHA256
9ee5037d648ddd37dce61070518a9c05f3a9a6c10dddb06ce239ef7812d1c2d9

SHA512
8c5469e30218f1ed32afbb8e94bac363c2676f268fb3d567be93a9829aaacd31aea5356199d4fbc641181ac624c844903133ecd61377add83a16f15137379bc3

Download Submit
memory/2156-0-0x0000000000AB0000-0x0000000000AD8000-memory.dmp

Filesize
160KB

Download
memory/2156-1-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2156-2-0x000000001B510000-0x000000001B590000-memory.dmp

Filesize
512KB

Download
memory/2156-31-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2156-32-0x000000001B510000-0x000000001B590000-memory.dmp

Filesize
512KB

Download
memory/2556-15-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2556-16-0x0000000001E60000-0x0000000001E68000-memory.dmp

Filesize
32KB

Download
memory/2640-7-0x0000000002CF0000-0x0000000002D70000-memory.dmp

Filesize
512KB

Download
memory/2640-8-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2640-9-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads