xworm | ae045f8e36db8f38af35258127ff43a71d522ae6ad15b7aad527bf75dd7a7666

Analysis

max time kernel
282s
max time network
280s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-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
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1596 cmd.exe

pid	process
1596	cmd.exe

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-1-5-21-3499517378-2376672570-1134980332-1000\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

3 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

668 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

LbsClient.exe

pid process

1388 LbsClient.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

LbsClient.exe

description pid process

Token: SeDebugPrivilege 1388 LbsClient.exe
Token: SeDebugPrivilege 1388 LbsClient.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LbsClient.exe

pid process

1388 LbsClient.exe

flow	ioc
3	ip-api.com

pid	process
668	timeout.exe

pid	process
1388	LbsClient.exe

description	pid	process
Token: SeDebugPrivilege	1388	LbsClient.exe
Token: SeDebugPrivilege	1388	LbsClient.exe

pid	process
1388	LbsClient.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

LbsClient.execmd.exe

description	pid	process	target process
PID 1388 wrote to memory of 1596	1388	LbsClient.exe	cmd.exe
PID 1388 wrote to memory of 1596	1388	LbsClient.exe	cmd.exe
PID 1388 wrote to memory of 1596	1388	LbsClient.exe	cmd.exe
PID 1596 wrote to memory of 668	1596	cmd.exe	timeout.exe
PID 1596 wrote to memory of 668	1596	cmd.exe	timeout.exe
PID 1596 wrote to memory of 668	1596	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:1388

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3DCC.tmp.bat""
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1596

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:668

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp3DCC.tmp.bat
Filesize
161B

MD5
455f4a607c3ca33df4bcf329d63f3f14

SHA1
d92f3448a84a4ade34c5741d397d485bc8771476

SHA256
b3e273ac513357ab1479a2927a7eeb54e4eca711e3857872a69bc44b6b4b8d52

SHA512
fbb9a23ab3065e926029a9ecf6cd2aaf4e3c30b5c4162c6237ca1ea9815fe92875b478fb07d6a79e041e33d8021caf0c90187f586d53740d18e52168d22ea8b8

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3DCC.tmp.bat
Filesize
161B

MD5
455f4a607c3ca33df4bcf329d63f3f14

SHA1
d92f3448a84a4ade34c5741d397d485bc8771476

SHA256
b3e273ac513357ab1479a2927a7eeb54e4eca711e3857872a69bc44b6b4b8d52

SHA512
fbb9a23ab3065e926029a9ecf6cd2aaf4e3c30b5c4162c6237ca1ea9815fe92875b478fb07d6a79e041e33d8021caf0c90187f586d53740d18e52168d22ea8b8

Download Submit
memory/1388-54-0x0000000000150000-0x0000000000166000-memory.dmp

Filesize
88KB

Download
memory/1388-55-0x000000001B110000-0x000000001B190000-memory.dmp

Filesize
512KB

Download