xworm | 6c5dd289cd2ec3345727cbe7430e50c7743596c5b1d258065e23c7a02865c1c4

Analysis

max time kernel
143s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30-06-2024 03:26

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General

Target

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe
Size

41KB
MD5

ada4045ee6399dc5733826a4d7e43a10
SHA1

5184959ba1eb9034df44fb309be3781cee9a3d83
SHA256

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad
SHA512

8987d6809bb5a8f9e94c35115d86cf9de6b1b3ee732e10338e38df33f2608954e6c5a61024ddcd7a833861aea0fd2aec94670aba529b73928031854fc39df1b0
SSDEEP

768:1KjSON6U+0VT7OWCCKUS0BMRjJF5Pa9pmA6vOwhy3/+zc:1gStUJVTa1nFrtF49AA6vOwg2o

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

156.225.129.202:7000

Mutex

lUhImY84qBJOkvuH

Attributes

Install_directory
%AppData%
install_file
crss.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource yara_rule

behavioral2/memory/560-1-0x0000000000DE0000-0x0000000000DF0000-memory.dmp family_xworm
C:\Users\Admin\AppData\Roaming\crss.exe 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

1716 powershell.exe
4728 powershell.exe
4536 powershell.exe
4492 powershell.exe

resource	yara_rule
behavioral2/memory/560-1-0x0000000000DE0000-0x0000000000DF0000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\crss.exe	family_xworm

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:

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

Drops startup file 2 IoCs

Processes:

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

Executes dropped EXE 2 IoCs

Processes:

crss.execrss.exe

pid process

4520 crss.exe
412 crss.exe

pid	process
4520	crss.exe
412	crss.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\crss = "C:\\Users\\Admin\\AppData\\Roaming\\crss.exe"	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.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
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

3464 schtasks.exe

flow	ioc
14	ip-api.com

pid	process
3464	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

pid	process
1716	powershell.exe
1716	powershell.exe
4728	powershell.exe
4728	powershell.exe
4536	powershell.exe
4536	powershell.exe
4492	powershell.exe
4492	powershell.exe
560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exepowershell.exepowershell.exepowershell.exepowershell.execrss.execrss.exe

description	pid	process
Token: SeDebugPrivilege	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe
Token: SeDebugPrivilege	1716	powershell.exe
Token: SeDebugPrivilege	4728	powershell.exe
Token: SeDebugPrivilege	4536	powershell.exe
Token: SeDebugPrivilege	4492	powershell.exe
Token: SeDebugPrivilege	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe
Token: SeDebugPrivilege	4520	crss.exe
Token: SeDebugPrivilege	412	crss.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

pid process

560 07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

pid	process
560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe

description	pid	process	target process
PID 560 wrote to memory of 1716	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 1716	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 4728	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 4728	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 4536	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 4536	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 4492	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 4492	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	powershell.exe
PID 560 wrote to memory of 3464	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe	schtasks.exe
PID 560 wrote to memory of 3464	560	07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.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\07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe
"C:\Users\Admin\AppData\Local\Temp\07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.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:560

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\07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1716

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4728

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\crss.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4536

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'crss.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4492

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "crss" /tr "C:\Users\Admin\AppData\Roaming\crss.exe"
2⤵
- Scheduled Task/Job: Scheduled Task
PID:3464

C:\Users\Admin\AppData\Roaming\crss.exe
C:\Users\Admin\AppData\Roaming\crss.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4520

C:\Users\Admin\AppData\Roaming\crss.exe
C:\Users\Admin\AppData\Roaming\crss.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:412

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\crss.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

MD5
10fb30dc297f99d6ebafa5fee8b24fa2

SHA1
76904509313a49a765edcde26b69c3a61f9fa225

SHA256
567bcacac120711fc04bf8e6c8cd0bff7b61e8ee0a6316254d1005ebb1264e6a

SHA512
c42ace1ea0923fa55592f4f486a508ea56997fdbe0200016b0fc16a33452fc28e4530129a315b3b3a5ede37a07097c13a0eb310c9e91e5d97bb7ce7b955b9498

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

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_er5hnp4h.xds.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\crss.exe
Filesize
41KB

MD5
ada4045ee6399dc5733826a4d7e43a10

SHA1
5184959ba1eb9034df44fb309be3781cee9a3d83

SHA256
07ecf0ee68a52e1783da654389f5adaa861b5e7cfff04cbec504e721cc3a11ad

SHA512
8987d6809bb5a8f9e94c35115d86cf9de6b1b3ee732e10338e38df33f2608954e6c5a61024ddcd7a833861aea0fd2aec94670aba529b73928031854fc39df1b0

Download Submit
memory/560-1-0x0000000000DE0000-0x0000000000DF0000-memory.dmp

Filesize
64KB

Download
memory/560-2-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

Filesize
10.8MB

Download
memory/560-0-0x00007FF917AA3000-0x00007FF917AA5000-memory.dmp

Filesize
8KB

Download
memory/560-58-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

Filesize
10.8MB

Download
memory/560-57-0x00007FF917AA3000-0x00007FF917AA5000-memory.dmp

Filesize
8KB

Download
memory/1716-4-0x000001DA77FC0000-0x000001DA77FE2000-memory.dmp

Filesize
136KB

Download
memory/1716-18-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

Filesize
10.8MB

Download
memory/1716-15-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

Filesize
10.8MB

Download
memory/1716-5-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

Filesize
10.8MB

Download
memory/1716-3-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

Filesize
10.8MB

Download