xworm | c6451291df83bdd8b0af55160337e37a0f82cc3611475c05728bc50cd9777a5d

General

Target

XClient.exe
Size

245KB
MD5

8514e447cbf1f4e469b068e00c081976
SHA1

63bf10cb68dec396255cb6c541c4120280c0b237
SHA256

c6451291df83bdd8b0af55160337e37a0f82cc3611475c05728bc50cd9777a5d
SHA512

68c75b3b2d74cb2fb154ba2c133fe0b2604aab553915d69348ba7c461558c6937b478dfaa208af30316744ba16f3c3f26b40e7fe9e4e6d993f9c8bb14402599b
SSDEEP

6144:6dfCUJQb8RaGHUhcX7elbKTua9bfF/H9d9n:VURaGH3X3u+

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

140.99.97.156:7000

Attributes

Install_directory
%ProgramData%
install_file
VLC_Media.exe

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4080-1-0x0000000000350000-0x0000000000392000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

3832 powershell.exe
3400 powershell.exe
1112 powershell.exe
688 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-1-5-21-1181767204-2009306918-3718769404-1000\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\VLC_Media.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VLC_Media.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

21 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
21	ip-api.com

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	process
3832	powershell.exe
3832	powershell.exe
3832	powershell.exe
3400	powershell.exe
3400	powershell.exe
3400	powershell.exe
1112	powershell.exe
1112	powershell.exe
1112	powershell.exe
688	powershell.exe
688	powershell.exe
688	powershell.exe
4080	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	4080	XClient.exe
Token: SeDebugPrivilege	3832	powershell.exe
Token: SeDebugPrivilege	3400	powershell.exe
Token: SeDebugPrivilege	1112	powershell.exe
Token: SeDebugPrivilege	688	powershell.exe
Token: SeDebugPrivilege	4080	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

4080 XClient.exe

pid	process
4080	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 4080 wrote to memory of 3832	4080	XClient.exe	powershell.exe
PID 4080 wrote to memory of 3832	4080	XClient.exe	powershell.exe
PID 4080 wrote to memory of 3400	4080	XClient.exe	powershell.exe
PID 4080 wrote to memory of 3400	4080	XClient.exe	powershell.exe
PID 4080 wrote to memory of 1112	4080	XClient.exe	powershell.exe
PID 4080 wrote to memory of 1112	4080	XClient.exe	powershell.exe
PID 4080 wrote to memory of 688	4080	XClient.exe	powershell.exe
PID 4080 wrote to memory of 688	4080	XClient.exe	powershell.exe

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:4080

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:3832

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:3400

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\VLC_Media.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1112

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'VLC_Media.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:688

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4320,i,13879737908471496610,15335851594401413307,262144 --variations-seed-version --mojo-platform-channel-handle=1416 /prefetch:8
1⤵
PID:2656

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

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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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
797ae9992515d61cac86ee490b4f6869

SHA1
03d602c66b05a1c0cd11ed54ac3d3b0eb6fd336c

SHA256
32f64b0577e3ba4380020ba85069e94ae66a2f5ef1e2688c3148d33dde46224a

SHA512
857a2c8e95c555a526f142be9591bd7e10f5186d96aeb74f0e9fc4b76d10f96d592d798343d2fb0d27dd7e6f0f9c3b8ce4c24566e56d19faa5014b335b66c115

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
e3b6cc0fbea08a0831f0026a696db8b8

SHA1
4e32202d4700061cfd80d55e42798131c9f530d4

SHA256
3284cae7b82be99d93064390ba071ba4321f3f24dd21515b37b2ca9f31b2e8d5

SHA512
6a06856f360b48c8bc8a15ffb8d7a6604ec357bcb1d0fad5d71a2cb876929a7b67eb40ba4493998ab1bbae8cb71212e124276f27d5c138a135041c27a41a0b7a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lm1skkfu.ud3.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3832-13-0x00007FF842860000-0x00007FF843321000-memory.dmp

Filesize
10.8MB

Download
memory/3832-14-0x00007FF842860000-0x00007FF843321000-memory.dmp

Filesize
10.8MB

Download
memory/3832-15-0x00007FF842860000-0x00007FF843321000-memory.dmp

Filesize
10.8MB

Download
memory/3832-18-0x00007FF842860000-0x00007FF843321000-memory.dmp

Filesize
10.8MB

Download
memory/3832-8-0x000002BB2DA00000-0x000002BB2DA22000-memory.dmp

Filesize
136KB

Download
memory/4080-0-0x00007FF842863000-0x00007FF842865000-memory.dmp

Filesize
8KB

Download
memory/4080-2-0x00007FF842860000-0x00007FF843321000-memory.dmp

Filesize
10.8MB

Download
memory/4080-1-0x0000000000350000-0x0000000000392000-memory.dmp

Filesize
264KB

Download
memory/4080-57-0x00007FF842863000-0x00007FF842865000-memory.dmp

Filesize
8KB

Download
memory/4080-58-0x00007FF842860000-0x00007FF843321000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads