xworm | e9cb28657a6dcd7e0f17f6e4f7d128351c389784bb027fdaba7f669794edc846

Analysis

max time kernel
142s
max time network
141s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
13-11-2024 10:34

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General

Target

SecurityHealthService.exe
Size

444KB
MD5

73c088a54fd675be63ae50e1415bce9b
SHA1

968ca108ce1d803f69cc3e1833d6d56615342169
SHA256

e9cb28657a6dcd7e0f17f6e4f7d128351c389784bb027fdaba7f669794edc846
SHA512

109d80075631fae4a952b972073677aafdb8b6c70d7e6ac1add6d6bfb5bee9a5227c3691d229a70ac67b993f37464b89efaf87b62f6646b135311e04419f9c09
SSDEEP

6144:IhuPcWqUsvDuKolyqL1eLBXziQZm07wGj386cDrWTAdjiutNNStXL297RDc+BwZI:IMyUsbuKwmFifywGWBPNStyxRDc+S

Score

10^/10

xworm discovery persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

QTumvC8IOVGR3m18

Attributes

install_file
USB.exe
pastebin_url
https://pastebin.com/raw/nV1XKCv3

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/332-22-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/332-24-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/332-27-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/332-30-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/332-29-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\Music\\Windows Security Health Host.exe,"	reg.exe

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

Executes dropped EXE 2 IoCs

pid	Process
1008	Windows Security Health Host.exe
332	Windows Security Health Host.exe

Loads dropped DLL 2 IoCs

pid	Process
2848	cmd.exe
2848	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1008 set thread context of 332	1008	Windows Security Health Host.exe	40

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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windows Security Health Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windows Security Health Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecurityHealthService.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
2804	cmd.exe
2912	PING.EXE
2848	cmd.exe
2904	PING.EXE
2688	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2688	PING.EXE
2912	PING.EXE
2904	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2932	SecurityHealthService.exe
2932	SecurityHealthService.exe
2932	SecurityHealthService.exe
2932	SecurityHealthService.exe
2932	SecurityHealthService.exe
2932	SecurityHealthService.exe
1008	Windows Security Health Host.exe
1008	Windows Security Health Host.exe
1008	Windows Security Health Host.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2932	SecurityHealthService.exe
Token: SeDebugPrivilege	1008	Windows Security Health Host.exe
Token: SeDebugPrivilege	332	Windows Security Health Host.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2804	2932	SecurityHealthService.exe	30
PID 2932 wrote to memory of 2804	2932	SecurityHealthService.exe	30
PID 2932 wrote to memory of 2804	2932	SecurityHealthService.exe	30
PID 2932 wrote to memory of 2804	2932	SecurityHealthService.exe	30
PID 2804 wrote to memory of 2912	2804	cmd.exe	32
PID 2804 wrote to memory of 2912	2804	cmd.exe	32
PID 2804 wrote to memory of 2912	2804	cmd.exe	32
PID 2804 wrote to memory of 2912	2804	cmd.exe	32
PID 2932 wrote to memory of 2848	2932	SecurityHealthService.exe	33
PID 2932 wrote to memory of 2848	2932	SecurityHealthService.exe	33
PID 2932 wrote to memory of 2848	2932	SecurityHealthService.exe	33
PID 2932 wrote to memory of 2848	2932	SecurityHealthService.exe	33
PID 2848 wrote to memory of 2904	2848	cmd.exe	35
PID 2848 wrote to memory of 2904	2848	cmd.exe	35
PID 2848 wrote to memory of 2904	2848	cmd.exe	35
PID 2848 wrote to memory of 2904	2848	cmd.exe	35
PID 2804 wrote to memory of 2956	2804	cmd.exe	36
PID 2804 wrote to memory of 2956	2804	cmd.exe	36
PID 2804 wrote to memory of 2956	2804	cmd.exe	36
PID 2804 wrote to memory of 2956	2804	cmd.exe	36
PID 2848 wrote to memory of 2688	2848	cmd.exe	37
PID 2848 wrote to memory of 2688	2848	cmd.exe	37
PID 2848 wrote to memory of 2688	2848	cmd.exe	37
PID 2848 wrote to memory of 2688	2848	cmd.exe	37
PID 2848 wrote to memory of 1008	2848	cmd.exe	39
PID 2848 wrote to memory of 1008	2848	cmd.exe	39
PID 2848 wrote to memory of 1008	2848	cmd.exe	39
PID 2848 wrote to memory of 1008	2848	cmd.exe	39
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40
PID 1008 wrote to memory of 332	1008	Windows Security Health Host.exe	40

C:\Users\Admin\AppData\Local\Temp\SecurityHealthService.exe
"C:\Users\Admin\AppData\Local\Temp\SecurityHealthService.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 10 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\Music\Windows Security Health Host.exe,"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2912
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\Music\Windows Security Health Host.exe,"
    3⤵
    - Modifies WinLogon for persistence
    - System Location Discovery: System Language Discovery
    PID:2956
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 13 > nul && copy "C:\Users\Admin\AppData\Local\Temp\SecurityHealthService.exe" "C:\Users\Admin\Music\Windows Security Health Host.exe" && ping 127.0.0.1 -n 13 > nul && "C:\Users\Admin\Music\Windows Security Health Host.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2848
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 13
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2904
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 13
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2688
- - C:\Users\Admin\Music\Windows Security Health Host.exe
    "C:\Users\Admin\Music\Windows Security Health Host.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:1008
  - - C:\Users\Admin\Music\Windows Security Health Host.exe
      "C:\Users\Admin\Music\Windows Security Health Host.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

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

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\Music\Windows Security Health Host.exe

Filesize
444KB

MD5
73c088a54fd675be63ae50e1415bce9b

SHA1
968ca108ce1d803f69cc3e1833d6d56615342169

SHA256
e9cb28657a6dcd7e0f17f6e4f7d128351c389784bb027fdaba7f669794edc846

SHA512
109d80075631fae4a952b972073677aafdb8b6c70d7e6ac1add6d6bfb5bee9a5227c3691d229a70ac67b993f37464b89efaf87b62f6646b135311e04419f9c09

Download Submit
memory/332-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/332-29-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/332-30-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/332-27-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/332-26-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/332-24-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/332-22-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/332-20-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1008-17-0x0000000000A90000-0x0000000000A96000-memory.dmp

Filesize
24KB

Download
memory/1008-16-0x00000000004F0000-0x000000000050A000-memory.dmp

Filesize
104KB

Download
memory/1008-15-0x0000000001330000-0x00000000013A6000-memory.dmp

Filesize
472KB

Download
memory/2932-0-0x00000000748CE000-0x00000000748CF000-memory.dmp

Filesize
4KB

Download
memory/2932-4-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2932-3-0x0000000000410000-0x0000000000452000-memory.dmp

Filesize
264KB

Download
memory/2932-2-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2932-1-0x0000000001080000-0x00000000010F6000-memory.dmp

Filesize
472KB

Download