xworm | 88bb5a5fe3e9eb6dd9e68f8086ac795da6263337058dab762e0a7ecce9eee2e0

General

Target

XClient.exe
Size

61KB
MD5

749532615ba40ead1048a013db63f232
SHA1

3ee0802705c604c701d54610ebc8881b6c5d1722
SHA256

88bb5a5fe3e9eb6dd9e68f8086ac795da6263337058dab762e0a7ecce9eee2e0
SHA512

08a70e10a017b6126c296a68d559ec7b1fadf9c04c372a8dd40a46dc1e876947631b075f6cb4af46da86dc200c615afecd4b5d4187ff59f6848312c0582192e6
SSDEEP

1536:MEt7v9JjRhBL7ZiO7DCWsnkbDMN7w5Ovgj:9tpJdj3ZrD6kbDMm5Ovu

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

24.ip.gl.ply.gg:16322

Attributes

Install_directory
%AppData%
install_file
windowscleaner.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2016-1-0x0000000000EC0000-0x0000000000ED6000-memory.dmp	family_xworm
behavioral1/files/0x0009000000016311-9.dat	family_xworm
behavioral1/memory/2800-11-0x00000000013D0000-0x00000000013E6000-memory.dmp	family_xworm
behavioral1/memory/1560-16-0x00000000002D0000-0x00000000002E6000-memory.dmp	family_xworm
behavioral1/memory/2180-18-0x0000000000200000-0x0000000000216000-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 opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\windowscleaner.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\windowscleaner.lnk	XClient.exe

Executes dropped EXE 3 IoCs

pid	Process
2800	windowscleaner.exe
1560	windowscleaner.exe
2180	windowscleaner.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\windowscleaner = "C:\\Users\\Admin\\AppData\\Roaming\\windowscleaner.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
2464	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	XClient.exe
Token: SeDebugPrivilege	2800	windowscleaner.exe
Token: SeDebugPrivilege	1560	windowscleaner.exe
Token: SeDebugPrivilege	2180	windowscleaner.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 2464	2016	XClient.exe	31
PID 2016 wrote to memory of 2464	2016	XClient.exe	31
PID 2016 wrote to memory of 2464	2016	XClient.exe	31
PID 2720 wrote to memory of 2800	2720	taskeng.exe	35
PID 2720 wrote to memory of 2800	2720	taskeng.exe	35
PID 2720 wrote to memory of 2800	2720	taskeng.exe	35
PID 2720 wrote to memory of 1560	2720	taskeng.exe	36
PID 2720 wrote to memory of 1560	2720	taskeng.exe	36
PID 2720 wrote to memory of 1560	2720	taskeng.exe	36
PID 2720 wrote to memory of 2180	2720	taskeng.exe	37
PID 2720 wrote to memory of 2180	2720	taskeng.exe	37
PID 2720 wrote to memory of 2180	2720	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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "windowscleaner" /tr "C:\Users\Admin\AppData\Roaming\windowscleaner.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2464

C:\Windows\system32\taskeng.exe
taskeng.exe {597B256B-E76A-4D2A-A233-E0DD41D196E2} S-1-5-21-3533259084-2542256011-65585152-1000:XPAJOTIY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2720
- C:\Users\Admin\AppData\Roaming\windowscleaner.exe
  C:\Users\Admin\AppData\Roaming\windowscleaner.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2800
- C:\Users\Admin\AppData\Roaming\windowscleaner.exe
  C:\Users\Admin\AppData\Roaming\windowscleaner.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1560
- C:\Users\Admin\AppData\Roaming\windowscleaner.exe
  C:\Users\Admin\AppData\Roaming\windowscleaner.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2180

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\windowscleaner.exe

Filesize
61KB

MD5
749532615ba40ead1048a013db63f232

SHA1
3ee0802705c604c701d54610ebc8881b6c5d1722

SHA256
88bb5a5fe3e9eb6dd9e68f8086ac795da6263337058dab762e0a7ecce9eee2e0

SHA512
08a70e10a017b6126c296a68d559ec7b1fadf9c04c372a8dd40a46dc1e876947631b075f6cb4af46da86dc200c615afecd4b5d4187ff59f6848312c0582192e6

Download Submit
memory/1560-16-0x00000000002D0000-0x00000000002E6000-memory.dmp

Filesize
88KB

Download
memory/2016-0-0x000007FEF5C53000-0x000007FEF5C54000-memory.dmp

Filesize
4KB

Download
memory/2016-1-0x0000000000EC0000-0x0000000000ED6000-memory.dmp

Filesize
88KB

Download
memory/2016-6-0x000007FEF5C50000-0x000007FEF663C000-memory.dmp

Filesize
9.9MB

Download
memory/2016-7-0x000007FEF5C53000-0x000007FEF5C54000-memory.dmp

Filesize
4KB

Download
memory/2016-12-0x000007FEF5C50000-0x000007FEF663C000-memory.dmp

Filesize
9.9MB

Download
memory/2016-13-0x00000000004E0000-0x00000000004EC000-memory.dmp

Filesize
48KB

Download
memory/2180-18-0x0000000000200000-0x0000000000216000-memory.dmp

Filesize
88KB

Download
memory/2800-11-0x00000000013D0000-0x00000000013E6000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads