xworm | 5da1772e67ac37571ed70b498e237cde750647607d4fe98fd8e7fd8668e0c0e0

General

Target

XClient.exe
Size

41KB
MD5

0658f349a11af82050212edf3f599342
SHA1

0fa5f0818a7e50fd312f5dab4b7150de7df9fa7e
SHA256

5da1772e67ac37571ed70b498e237cde750647607d4fe98fd8e7fd8668e0c0e0
SHA512

0c337cf6b38a2e2c7078813c61086a173c5761f4b90efdbee85fd7edb4f16731d66a9ea95bc4988340b64e37d75b4227b224a110bb0e64fc36e076511857c3f7
SSDEEP

768:TKr2/FPtKX7eRvIiWqyAuIzfjFSuDatF5PG9sJOwhU3ECN:The7EI3RAuwxSuDuFI9sJOwGlN

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

panel-slave.gl.at.ply.gg:57059

Mutex

kdrfWObdXWjh7iBF

Attributes

Install_directory
%AppData%
install_file
$77client.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1852-1-0x0000000000B30000-0x0000000000B40000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\$77client.exe	family_xworm
behavioral1/memory/1244-12-0x00000000009F0000-0x0000000000A00000-memory.dmp	family_xworm
behavioral1/memory/592-15-0x0000000000D70000-0x0000000000D80000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

Processes:

XClient.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77client.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77client.lnk	XClient.exe

Executes dropped EXE 2 IoCs

Processes:

$77client.exe$77client.exe

pid process

1244 $77client.exe
592 $77client.exe

pid	process
1244	$77client.exe
592	$77client.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77client = "C:\\Users\\Admin\\AppData\\Roaming\\$77client.exe"	XClient.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

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2804 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

XClient.exe

pid process

1852 XClient.exe

flow	ioc
2	ip-api.com

pid	process
2804	schtasks.exe

pid	process
1852	XClient.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

XClient.exe$77client.exe$77client.exe

description	pid	process
Token: SeDebugPrivilege	1852	XClient.exe
Token: SeDebugPrivilege	1852	XClient.exe
Token: SeDebugPrivilege	1244	$77client.exe
Token: SeDebugPrivilege	592	$77client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

1852 XClient.exe

pid	process
1852	XClient.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

XClient.exetaskeng.exe

description	pid	process	target process
PID 1852 wrote to memory of 2804	1852	XClient.exe	schtasks.exe
PID 1852 wrote to memory of 2804	1852	XClient.exe	schtasks.exe
PID 1852 wrote to memory of 2804	1852	XClient.exe	schtasks.exe
PID 2120 wrote to memory of 1244	2120	taskeng.exe	$77client.exe
PID 2120 wrote to memory of 1244	2120	taskeng.exe	$77client.exe
PID 2120 wrote to memory of 1244	2120	taskeng.exe	$77client.exe
PID 2120 wrote to memory of 592	2120	taskeng.exe	$77client.exe
PID 2120 wrote to memory of 592	2120	taskeng.exe	$77client.exe
PID 2120 wrote to memory of 592	2120	taskeng.exe	$77client.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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.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:1852

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77client" /tr "C:\Users\Admin\AppData\Roaming\$77client.exe"
2⤵
- Creates scheduled task(s)
PID:2804

C:\Windows\system32\taskeng.exe
taskeng.exe {E786B5C9-5AF4-4CC2-A2E9-0332E49B80C3} S-1-5-21-2737914667-933161113-3798636211-1000:PUMARTNR\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2120

C:\Users\Admin\AppData\Roaming\$77client.exe
C:\Users\Admin\AppData\Roaming\$77client.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1244

C:\Users\Admin\AppData\Roaming\$77client.exe
C:\Users\Admin\AppData\Roaming\$77client.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\$77client.exe

Filesize
41KB

MD5
0658f349a11af82050212edf3f599342

SHA1
0fa5f0818a7e50fd312f5dab4b7150de7df9fa7e

SHA256
5da1772e67ac37571ed70b498e237cde750647607d4fe98fd8e7fd8668e0c0e0

SHA512
0c337cf6b38a2e2c7078813c61086a173c5761f4b90efdbee85fd7edb4f16731d66a9ea95bc4988340b64e37d75b4227b224a110bb0e64fc36e076511857c3f7

Download Submit
memory/592-15-0x0000000000D70000-0x0000000000D80000-memory.dmp

Filesize
64KB

Download
memory/1244-12-0x00000000009F0000-0x0000000000A00000-memory.dmp

Filesize
64KB

Download
memory/1852-0-0x000007FEF5783000-0x000007FEF5784000-memory.dmp

Filesize
4KB

Download
memory/1852-1-0x0000000000B30000-0x0000000000B40000-memory.dmp

Filesize
64KB

Download
memory/1852-2-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

Filesize
9.9MB

Download
memory/1852-7-0x000007FEF5783000-0x000007FEF5784000-memory.dmp

Filesize
4KB

Download
memory/1852-8-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads