xworm | 8605ee7e95cfa1e4227c4d19acf8418cd18157515efda8f8ebbb7ce6eeaa7857

General

Target

XClient.exe
Size

67KB
MD5

b5ea7d94e5e61976ad39908ce98d3717
SHA1

23ef2cd169718cf5eb00e4a6a972888e4caff74f
SHA256

8605ee7e95cfa1e4227c4d19acf8418cd18157515efda8f8ebbb7ce6eeaa7857
SHA512

51c37b8c79f40bef577ee75c37471e358cdd3f80fea5477b33fdd3325f0320223aabdbd20ea7b481fafdb13316e2b4d566e4497255612581404662c3b4c7eb62
SSDEEP

1536:clLmeR5RsNC/70/KlTLHYd+bk81FxJRgZ6fwQOCDPnOdNL:cpPvRQu0/KlfYd+bnaQOEPnOfL

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

currently-rochester.gl.at.ply.gg:30522

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2680-1-0x0000000000BF0000-0x0000000000C08000-memory.dmp	family_xworm
behavioral1/files/0x002e00000001936b-10.dat	family_xworm
behavioral1/memory/2720-12-0x00000000013A0000-0x00000000013B8000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2720	XClient.exe
776	XClient.exe
1020	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

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

pid	Process
2704	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2680	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2680	XClient.exe
Token: SeDebugPrivilege	2680	XClient.exe
Token: SeDebugPrivilege	2720	XClient.exe
Token: SeDebugPrivilege	776	XClient.exe
Token: SeDebugPrivilege	1020	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2680	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2704	2680	XClient.exe	31
PID 2680 wrote to memory of 2704	2680	XClient.exe	31
PID 2680 wrote to memory of 2704	2680	XClient.exe	31
PID 2568 wrote to memory of 2720	2568	taskeng.exe	34
PID 2568 wrote to memory of 2720	2568	taskeng.exe	34
PID 2568 wrote to memory of 2720	2568	taskeng.exe	34
PID 2568 wrote to memory of 776	2568	taskeng.exe	36
PID 2568 wrote to memory of 776	2568	taskeng.exe	36
PID 2568 wrote to memory of 776	2568	taskeng.exe	36
PID 2568 wrote to memory of 1020	2568	taskeng.exe	37
PID 2568 wrote to memory of 1020	2568	taskeng.exe	37
PID 2568 wrote to memory of 1020	2568	taskeng.exe	37

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:2680
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2704

C:\Windows\system32\taskeng.exe
taskeng.exe {ECD4FE92-0940-423C-878F-7CBA65A5CBFA} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2720
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:776
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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\XClient.exe

Filesize
67KB

MD5
b5ea7d94e5e61976ad39908ce98d3717

SHA1
23ef2cd169718cf5eb00e4a6a972888e4caff74f

SHA256
8605ee7e95cfa1e4227c4d19acf8418cd18157515efda8f8ebbb7ce6eeaa7857

SHA512
51c37b8c79f40bef577ee75c37471e358cdd3f80fea5477b33fdd3325f0320223aabdbd20ea7b481fafdb13316e2b4d566e4497255612581404662c3b4c7eb62

Download Submit
memory/2680-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2680-1-0x0000000000BF0000-0x0000000000C08000-memory.dmp

Filesize
96KB

Download
memory/2680-6-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2680-7-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2680-8-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2720-12-0x00000000013A0000-0x00000000013B8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads