xworm | ae045f8e36db8f38af35258127ff43a71d522ae6ad15b7aad527bf75dd7a7666

Analysis

max time kernel
1209s
max time network
1213s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
24-03-2023 11:42

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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

Extracted

Family

xworm

ways-examining.at.ply.gg:18120

Attributes

install_file
USB.exe

Signatures

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-1-5-21-144354903-2550862337-1367551827-1000\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

26 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

4376 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

LbsClient.exe

pid process

4680 LbsClient.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

LbsClient.exe

description pid process

Token: SeDebugPrivilege 4680 LbsClient.exe
Token: SeDebugPrivilege 4680 LbsClient.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LbsClient.exe

pid process

4680 LbsClient.exe

flow	ioc
26	ip-api.com

pid	process
4376	timeout.exe

pid	process
4680	LbsClient.exe

description	pid	process
Token: SeDebugPrivilege	4680	LbsClient.exe
Token: SeDebugPrivilege	4680	LbsClient.exe

pid	process
4680	LbsClient.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

LbsClient.execmd.exe

description	pid	process	target process
PID 4680 wrote to memory of 4768	4680	LbsClient.exe	cmd.exe
PID 4680 wrote to memory of 4768	4680	LbsClient.exe	cmd.exe
PID 4768 wrote to memory of 4376	4768	cmd.exe	timeout.exe
PID 4768 wrote to memory of 4376	4768	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:4680

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp20B2.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4768

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4376

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\tmp20B2.tmp.bat
Filesize
161B

MD5
aa54a80dc5231cac40f1c82ca5973604

SHA1
747c3f48663ef9b111f443005c5ae9ef0f863c1c

SHA256
bb194902155f74b385f48c47b3f75b27d55aef2f8c633c4eb249b1ff4f72b973

SHA512
870729b3620f9a98f73b7de8205ef46af669fa67af90d82c77928091fc06ba0429edf02df135b4a21e2432440e37c5e3decba02c52a10fdfe449f67b32cd514c

Download Submit
memory/4680-133-0x0000000000500000-0x0000000000516000-memory.dmp

Filesize
88KB

Download
memory/4680-134-0x000000001C7C0000-0x000000001C7D0000-memory.dmp

Filesize
64KB

Download
memory/4680-141-0x000000001C7C0000-0x000000001C7D0000-memory.dmp

Filesize
64KB

Download