xworm | f3e91c0e63a38f99af50221e9215315f401d591968c9e76d2d786908a6cccf1b

Analysis

max time kernel
30s
max time network
31s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 05:41

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General

Target

windowspowershell.exe
Size

70KB
MD5

a65730c3385f81d9dd1245fd6a7dd8bc
SHA1

bfea51aad8077ffbe0893687c6706449e0204f07
SHA256

f3e91c0e63a38f99af50221e9215315f401d591968c9e76d2d786908a6cccf1b
SHA512

6e0327af881fbc18dc8542835513e502e1575aa4b94ced9b752194eb3d84014b0e8d47e9a44d0dc2d8eac9552b4fab7744ec4a486879d4242bd57a04ab6256c6
SSDEEP

1536:4xr5e+IPIyYGFZabUnYmjLha8qB2nD6T9aZOLTST6:gFE7YWQbUmt2cKOLM6

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

so-presently.gl.at.ply.gg :59751

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource yara_rule

behavioral2/memory/3704-1-0x0000000000410000-0x0000000000428000-memory.dmp family_xworm
C:\Users\Admin\AppData\Roaming\windowspowershell.exe family_xworm
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 3 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.exe

pid process

1708 powershell.exe
1032 powershell.exe
3404 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:

windowspowershell.exe

description ioc process

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

resource	yara_rule
behavioral2/memory/3704-1-0x0000000000410000-0x0000000000428000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\windowspowershell.exe	family_xworm

pid	process
1708	powershell.exe
1032	powershell.exe
3404	powershell.exe

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

Drops startup file 2 IoCs

Processes:

windowspowershell.exe

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

windowspowershell.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\windowspowershell = "C:\\Users\\Admin\\AppData\\Roaming\\windowspowershell.exe"	windowspowershell.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

15 ip-api.com
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

Processes:

schtasks.exe

pid process

1272 schtasks.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

powershell.exepowershell.exepowershell.exewindowspowershell.exe

pid process

1708 powershell.exe
1708 powershell.exe
1032 powershell.exe
1032 powershell.exe
3404 powershell.exe
3404 powershell.exe
3704 windowspowershell.exe

flow	ioc
15	ip-api.com

pid	process
1272	schtasks.exe

pid	process
1708	powershell.exe
1708	powershell.exe
1032	powershell.exe
1032	powershell.exe
3404	powershell.exe
3404	powershell.exe
3704	windowspowershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

windowspowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	3704	windowspowershell.exe
Token: SeDebugPrivilege	1708	powershell.exe
Token: SeDebugPrivilege	1032	powershell.exe
Token: SeDebugPrivilege	3404	powershell.exe
Token: SeDebugPrivilege	3704	windowspowershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowspowershell.exe

pid process

3704 windowspowershell.exe

pid	process
3704	windowspowershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

windowspowershell.exe

description	pid	process	target process
PID 3704 wrote to memory of 1708	3704	windowspowershell.exe	powershell.exe
PID 3704 wrote to memory of 1708	3704	windowspowershell.exe	powershell.exe
PID 3704 wrote to memory of 1032	3704	windowspowershell.exe	powershell.exe
PID 3704 wrote to memory of 1032	3704	windowspowershell.exe	powershell.exe
PID 3704 wrote to memory of 3404	3704	windowspowershell.exe	powershell.exe
PID 3704 wrote to memory of 3404	3704	windowspowershell.exe	powershell.exe
PID 3704 wrote to memory of 1272	3704	windowspowershell.exe	schtasks.exe
PID 3704 wrote to memory of 1272	3704	windowspowershell.exe	schtasks.exe

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\windowspowershell.exe
"C:\Users\Admin\AppData\Local\Temp\windowspowershell.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:3704

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\windowspowershell.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1708

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'windowspowershell.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1032

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\windowspowershell.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3404

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "windowspowershell" /tr "C:\Users\Admin\AppData\Roaming\windowspowershell.exe"
2⤵
- Scheduled Task/Job: Scheduled Task
PID:1272

Network

MITRE ATT&CK Matrix ATT&CK v13

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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
5f9246b90bb643f1f6e32b638684da6e

SHA1
7c3d0a783c969d3a55eb92669bd9183f0b7dd603

SHA256
4ac95bd39341c98026937c0fc18142ed1d3f034f5073c9b03defdfa1c9be8bad

SHA512
57285dcf7c0e0a0f477e3f6ff1aca9223785c221d899a74c02aa8f82619d1d1914562682a85dd4b4fadb25c95d98f016d76bb3c8049d38d8de8fa14db194110d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_avdfucow.nnw.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\windowspowershell.exe
Filesize
70KB

MD5
a65730c3385f81d9dd1245fd6a7dd8bc

SHA1
bfea51aad8077ffbe0893687c6706449e0204f07

SHA256
f3e91c0e63a38f99af50221e9215315f401d591968c9e76d2d786908a6cccf1b

SHA512
6e0327af881fbc18dc8542835513e502e1575aa4b94ced9b752194eb3d84014b0e8d47e9a44d0dc2d8eac9552b4fab7744ec4a486879d4242bd57a04ab6256c6

Download Submit
memory/1708-3-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/1708-10-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/1708-11-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/1708-18-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/1708-9-0x000001945BB40000-0x000001945BB62000-memory.dmp

Filesize
136KB

Download
memory/3704-0-0x00007FFFBA453000-0x00007FFFBA455000-memory.dmp

Filesize
8KB

Download
memory/3704-2-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/3704-1-0x0000000000410000-0x0000000000428000-memory.dmp

Filesize
96KB

Download
memory/3704-50-0x00007FFFBA453000-0x00007FFFBA455000-memory.dmp

Filesize
8KB

Download
memory/3704-51-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download