xworm | b5a4b1a445b993f44e351821b76c5bdc156c2f2609c6f6fbfc34a731e7d9937f

Resubmissions

05/03/2025, 01:10

250305-bjw13svky9 10

Analysis

max time kernel
94s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
05/03/2025, 01:10

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General

Target

QH8DN3K9X.exe
Size

518KB
MD5

8fd78d3f0ffc585c0946e347281caa9d
SHA1

1cd95c47a876b367a96b91575ce876f933659144
SHA256

b5a4b1a445b993f44e351821b76c5bdc156c2f2609c6f6fbfc34a731e7d9937f
SHA512

cc692611f688cf60a2d2f396e18e9ab7579832f127084a4c596b93550ecd913a952feff7c52f80f29e8d85217beb21659b5b644a8ea8cb653bbc74f0bb6bf27c
SSDEEP

6144:QC5gmYW9mPMQ/ay6H5hcQMFHYQdH2RYRtO7aIRvHLfaf97rUHZNTrtiZp6AH:jgtPx/uZhaHY4H2i2RvrfY0H7tc

Score

10^/10

xworm discovery persistence rat trojan

Malware Config

Extracted

Family

xworm

176.65.144.119:7000

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4848-21-0x0000000000400000-0x0000000000416000-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	InstallUtil.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	InstallUtil.exe

Executes dropped EXE 1 IoCs

pid	Process
1040	vcxxc.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-1-5-21-3181990009-820930284-137514597-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xcxz = "C:\\Users\\Admin\\AppData\\Roaming\\vcxxc.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1040 set thread context of 4848	1040	vcxxc.exe	110

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	QH8DN3K9X.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vcxxc.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 5 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4888	cmd.exe
1128	PING.EXE
1620	PING.EXE
876	cmd.exe
2788	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2788	PING.EXE
1128	PING.EXE
1620	PING.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4848	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
5116	QH8DN3K9X.exe
1040	vcxxc.exe
1040	vcxxc.exe
1040	vcxxc.exe
4848	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	QH8DN3K9X.exe
Token: SeDebugPrivilege	1040	vcxxc.exe
Token: SeDebugPrivilege	4848	InstallUtil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4848	InstallUtil.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 876	5116	QH8DN3K9X.exe	94
PID 5116 wrote to memory of 876	5116	QH8DN3K9X.exe	94
PID 5116 wrote to memory of 876	5116	QH8DN3K9X.exe	94
PID 876 wrote to memory of 2788	876	cmd.exe	96
PID 876 wrote to memory of 2788	876	cmd.exe	96
PID 876 wrote to memory of 2788	876	cmd.exe	96
PID 5116 wrote to memory of 4888	5116	QH8DN3K9X.exe	97
PID 5116 wrote to memory of 4888	5116	QH8DN3K9X.exe	97
PID 5116 wrote to memory of 4888	5116	QH8DN3K9X.exe	97
PID 4888 wrote to memory of 1128	4888	cmd.exe	99
PID 4888 wrote to memory of 1128	4888	cmd.exe	99
PID 4888 wrote to memory of 1128	4888	cmd.exe	99
PID 876 wrote to memory of 3048	876	cmd.exe	103
PID 876 wrote to memory of 3048	876	cmd.exe	103
PID 876 wrote to memory of 3048	876	cmd.exe	103
PID 4888 wrote to memory of 1620	4888	cmd.exe	104
PID 4888 wrote to memory of 1620	4888	cmd.exe	104
PID 4888 wrote to memory of 1620	4888	cmd.exe	104
PID 4888 wrote to memory of 1040	4888	cmd.exe	105
PID 4888 wrote to memory of 1040	4888	cmd.exe	105
PID 4888 wrote to memory of 1040	4888	cmd.exe	105
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110
PID 1040 wrote to memory of 4848	1040	vcxxc.exe	110

C:\Users\Admin\AppData\Local\Temp\QH8DN3K9X.exe
"C:\Users\Admin\AppData\Local\Temp\QH8DN3K9X.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5116
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 8 > nul && REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "xcxz" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\vcxxc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:876
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 8
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2788
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "xcxz" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\vcxxc.exe"
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:3048
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 11 > nul && copy "C:\Users\Admin\AppData\Local\Temp\QH8DN3K9X.exe" "C:\Users\Admin\AppData\Roaming\vcxxc.exe" && ping 127.0.0.1 -n 11 > nul && "C:\Users\Admin\AppData\Roaming\vcxxc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4888
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 11
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1128
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 11
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1620
- - C:\Users\Admin\AppData\Roaming\vcxxc.exe
    "C:\Users\Admin\AppData\Roaming\vcxxc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1040
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
      4⤵
      Drops startup file
      System Location Discovery: System Language Discovery
      Suspicious behavior: AddClipboardFormatListener
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\vcxxc.exe

Filesize
518KB

MD5
8fd78d3f0ffc585c0946e347281caa9d

SHA1
1cd95c47a876b367a96b91575ce876f933659144

SHA256
b5a4b1a445b993f44e351821b76c5bdc156c2f2609c6f6fbfc34a731e7d9937f

SHA512
cc692611f688cf60a2d2f396e18e9ab7579832f127084a4c596b93550ecd913a952feff7c52f80f29e8d85217beb21659b5b644a8ea8cb653bbc74f0bb6bf27c

Download Submit
memory/1040-23-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/1040-20-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/1040-19-0x00000000064C0000-0x00000000064C6000-memory.dmp

Filesize
24KB

Download
memory/1040-18-0x0000000006460000-0x000000000647A000-memory.dmp

Filesize
104KB

Download
memory/1040-17-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/1040-16-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4848-28-0x0000000007320000-0x0000000007386000-memory.dmp

Filesize
408KB

Download
memory/4848-21-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/5116-4-0x0000000004C00000-0x0000000004C26000-memory.dmp

Filesize
152KB

Download
memory/5116-10-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/5116-8-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/5116-7-0x00000000052F0000-0x00000000052FA000-memory.dmp

Filesize
40KB

Download
memory/5116-6-0x0000000005160000-0x00000000051F2000-memory.dmp

Filesize
584KB

Download
memory/5116-5-0x0000000005570000-0x0000000005B14000-memory.dmp

Filesize
5.6MB

Download
memory/5116-0-0x0000000074F6E000-0x0000000074F6F000-memory.dmp

Filesize
4KB

Download
memory/5116-3-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/5116-2-0x0000000004C30000-0x0000000004CCC000-memory.dmp

Filesize
624KB

Download
memory/5116-1-0x00000000001F0000-0x0000000000278000-memory.dmp

Filesize
544KB

Download