xworm | ae045f8e36db8f38af35258127ff43a71d522ae6ad15b7aad527bf75dd7a7666

Analysis

max time kernel
404s
max time network
1607s
platform
windows10-1703_x64
resource
win10-20230220-en
resource tags

arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
submitted
23-03-2023 10:24

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General

Target

LbsClient.exe
Size

63KB
MD5

762f2fc17465058d27010124bb425202
SHA1

1b6b701c9c09128886e4676c4f1e534c7db39ad9
SHA256

ae045f8e36db8f38af35258127ff43a71d522ae6ad15b7aad527bf75dd7a7666
SHA512

329eacc85396f176fb30989f8d85fbeea097388ab37edecf22c3f4f368c1b0b0106cc7ec5c5ad06abbe488868ce4a5731ab04e4e7852a3d37bb1bdc42bb4e932
SSDEEP

768:8FfQVS7rGOe01ZDKMFiw7qyignMEOoCenkHubK23vuEBXKZ7ifudOPJhsAjDOep:Yfo/mKM1qrgnqebKivpaV0udOR3us

Score

10^/10

xworm persistence rat trojan

Malware Config

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral1/memory/2516-127-0x0000000002F80000-0x0000000002F8C000-memory.dmp	disable_win_def

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

Drops startup file 2 IoCs

Processes:

LbsClient.exe

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

LbsClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1311743041-1167936498-546579926-1000\Software\Microsoft\Windows\CurrentVersion\Run\LbsClient = "C:\\Users\\Admin\\AppData\\Roaming\\LbsClient.exe"	LbsClient.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

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

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4688 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

LbsClient.exe

pid process

2516 LbsClient.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

LbsClient.exe

description pid process

Token: SeDebugPrivilege 2516 LbsClient.exe
Token: SeDebugPrivilege 2516 LbsClient.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LbsClient.exe

pid process

2516 LbsClient.exe

flow	ioc
1	ip-api.com

pid	process
4688	timeout.exe

pid	process
2516	LbsClient.exe

description	pid	process
Token: SeDebugPrivilege	2516	LbsClient.exe
Token: SeDebugPrivilege	2516	LbsClient.exe

pid	process
2516	LbsClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

LbsClient.execmd.execmd.exe

description	pid	process	target process
PID 2516 wrote to memory of 1484	2516	LbsClient.exe	cmd.exe
PID 2516 wrote to memory of 1484	2516	LbsClient.exe	cmd.exe
PID 1484 wrote to memory of 1348	1484	cmd.exe	netsh.exe
PID 1484 wrote to memory of 1348	1484	cmd.exe	netsh.exe
PID 2516 wrote to memory of 3856	2516	LbsClient.exe	cmd.exe
PID 2516 wrote to memory of 3856	2516	LbsClient.exe	cmd.exe
PID 3856 wrote to memory of 4688	3856	cmd.exe	timeout.exe
PID 3856 wrote to memory of 4688	3856	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\LbsClient.exe
"C:\Users\Admin\AppData\Local\Temp\LbsClient.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:2516
- C:\Windows\SYSTEM32\cmd.exe
  "cmd"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1484
- - C:\Windows\system32\netsh.exe
    netsh wlan show profiles
    3⤵
    PID:1348
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7963.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3856
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4688

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7963.tmp.bat

Filesize
161B

MD5
397e8be23791621e5e3640c78d7f19e5

SHA1
32e8e5ca3cdef28cc5221e24791aed8c4c3c92af

SHA256
ec8c9b223367a64d462b28e6b710f1ae05407ea12711b161d011e9937e449685

SHA512
7a1fad29dc83d6742f479057e1d67aefd8c14cc674a2947b56cd0e28f95fb647e2e25dafe7e67e7d28f09ff8e808b00b0cb7c66a642b02f459525207917048e1

Download Submit
memory/2516-121-0x0000000000DB0000-0x0000000000DC6000-memory.dmp

Filesize
88KB

Download
memory/2516-122-0x000000001BA40000-0x000000001BA50000-memory.dmp

Filesize
64KB

Download
memory/2516-126-0x000000001BA40000-0x000000001BA50000-memory.dmp

Filesize
64KB

Download
memory/2516-127-0x0000000002F80000-0x0000000002F8C000-memory.dmp

Filesize
48KB

Download
memory/2516-129-0x0000000001390000-0x0000000001412000-memory.dmp

Filesize
520KB

Download
memory/2516-130-0x0000000001350000-0x000000000135A000-memory.dmp

Filesize
40KB

Download