xworm | 4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
01/04/2024, 04:09

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe
Size 70KB
Sample240401-eqyd9sdf32
SHA256 4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311
MD5 109adf5a32829b151d536e30a81ee96b
SHA1 dc23006a97e7d5bc34eedec563432e63ed6a226a
SHA512 74e7fb13e195dcf6b8ed0f40c034925c3762b2e0c43c8faede99ce79a4b07966ff5336769db3f9f5bb4c0478cefc879d59b43d5ded5bda3e75d19bd0a1e9e9e5
SSDEEP 1536:QeYZA06UMG73jWw9o5zeS6LQR9bAayaIMbckM6mfOWcNFOfab:QfZxfMGTFXS6LQR9bAaZbfsfOPMab
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

involved-hurt.gl.at.ply.gg:35238

Attributes

Install_directory
%LocalAppData%
install_file
WindowsHealthSystem.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4372-0-0x0000000000FA0000-0x0000000000FB8000-memory.dmp	family_xworm
behavioral2/files/0x000a00000002a776-70.dat	family_xworm

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

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WindowsHealthSystem.lnk	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WindowsHealthSystem.lnk	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe

Executes dropped EXE 2 IoCs

pid	Process
2552	WindowsHealthSystem.exe
2124	WindowsHealthSystem.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-1-5-21-4280069375-290121026-380765049-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsHealthSystem = "C:\\Users\\Admin\\AppData\\Local\\WindowsHealthSystem.exe"	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe

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

pid	Process
428	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4900	powershell.exe
4900	powershell.exe
3664	powershell.exe
3664	powershell.exe
3284	powershell.exe
3284	powershell.exe
2456	powershell.exe
2456	powershell.exe
4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe
Token: SeDebugPrivilege	4900	powershell.exe
Token: SeDebugPrivilege	3664	powershell.exe
Token: SeDebugPrivilege	3284	powershell.exe
Token: SeDebugPrivilege	2456	powershell.exe
Token: SeDebugPrivilege	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe
Token: SeDebugPrivilege	2552	WindowsHealthSystem.exe
Token: SeDebugPrivilege	2124	WindowsHealthSystem.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4372 wrote to memory of 4900	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	77
PID 4372 wrote to memory of 4900	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	77
PID 4372 wrote to memory of 3664	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	79
PID 4372 wrote to memory of 3664	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	79
PID 4372 wrote to memory of 3284	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	81
PID 4372 wrote to memory of 3284	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	81
PID 4372 wrote to memory of 2456	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	83
PID 4372 wrote to memory of 2456	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	83
PID 4372 wrote to memory of 428	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	85
PID 4372 wrote to memory of 428	4372	4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe	85

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\4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe
"C:\Users\Admin\AppData\Local\Temp\4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4372
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4900
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3664
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\WindowsHealthSystem.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3284
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'WindowsHealthSystem.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2456
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "WindowsHealthSystem" /tr "C:\Users\Admin\AppData\Local\WindowsHealthSystem.exe"
  2⤵
  - Creates scheduled task(s)
  PID:428

C:\Users\Admin\AppData\Local\WindowsHealthSystem.exe
C:\Users\Admin\AppData\Local\WindowsHealthSystem.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2552

C:\Users\Admin\AppData\Local\WindowsHealthSystem.exe
C:\Users\Admin\AppData\Local\WindowsHealthSystem.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2124

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

WindowsHealthSystem.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\WindowsHealthSystem.exe.log
Size 654B
SHA256 e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3
MD5 2cbbb74b7da1f720b48ed31085cbd5b8
SHA1 79caa9a3ea8abe1b9c4326c3633da64a5f724964
SHA512 ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9
MD5 SHA1 SHA512

Submit Download

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888
MD5 1a9fa92a4f2e2ec9e244d43a6a4f8fb9
SHA1 9910190edfaccece1dfcc1d92e357772f5dae8f7
SHA512 5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe
MD5 781da0576417bf414dc558e5a315e2be
SHA1 215451c1e370be595f1c389f587efeaa93108b4c
SHA512 24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 4bb861850395dcc3bec4691e8b9f0fa733b8a2d568d460a9201d65250b12fee1
MD5 e47c3fa11e796c492a8388c946bf1636
SHA1 4a090378f0db26c6f019c9203f5b27f12fa865c7
SHA512 8d4af4eba3019cd060561f42cff11374eafe59da5e5ad677e41d0b9198b87d6d13706e760d13c70574ed1384993a1597f886d21fe6ecd0186379a1e93db30695
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_bmb4pzlk.nj5.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bmb4pzlk.nj5.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

WindowsHealthSystem.exe

Path C:\Users\Admin\AppData\Local\WindowsHealthSystem.exe
Size 70KB
SHA256 4b9d898379e5dd1d260c1706aa04aa8270994835a523bb83695062d92c830311
MD5 109adf5a32829b151d536e30a81ee96b
SHA1 dc23006a97e7d5bc34eedec563432e63ed6a226a
SHA512 74e7fb13e195dcf6b8ed0f40c034925c3762b2e0c43c8faede99ce79a4b07966ff5336769db3f9f5bb4c0478cefc879d59b43d5ded5bda3e75d19bd0a1e9e9e5
SSDEEP 1536:QeYZA06UMG73jWw9o5zeS6LQR9bAayaIMbckM6mfOWcNFOfab:QfZxfMGTFXS6LQR9bAaZbfsfOPMab
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2124-79-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/2124-78-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/2456-63-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/2456-60-0x0000029AFDBC0000-0x0000029AFDBD0000-memory.dmp

Download

memory/2456-50-0x0000029AFDBC0000-0x0000029AFDBD0000-memory.dmp

Download

memory/2456-49-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/2456-61-0x0000029AFDBC0000-0x0000029AFDBD0000-memory.dmp

Download

memory/2552-72-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/2552-74-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/3284-45-0x000002A97E890000-0x000002A97E8A0000-memory.dmp

Download

memory/3284-43-0x000002A97E890000-0x000002A97E8A0000-memory.dmp

Download

memory/3284-39-0x000002A97E890000-0x000002A97E8A0000-memory.dmp

Download

memory/3284-38-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/3284-48-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/3664-19-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/3664-32-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/3664-30-0x000001A71EB00000-0x000001A71EB10000-memory.dmp

Download

memory/3664-20-0x000001A71EB00000-0x000001A71EB10000-memory.dmp

Download

memory/4372-68-0x000000001BD60000-0x000000001BD70000-memory.dmp

Download

memory/4372-0-0x0000000000FA0000-0x0000000000FB8000-memory.dmp

Download

memory/4372-46-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/4372-69-0x000000001BD60000-0x000000001BD70000-memory.dmp

Download

memory/4372-1-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/4900-13-0x00000189E63D0000-0x00000189E63E0000-memory.dmp

Download

memory/4900-9-0x00000189E63D0000-0x00000189E63E0000-memory.dmp

Download

memory/4900-14-0x00000189E63D0000-0x00000189E63E0000-memory.dmp

Download

memory/4900-17-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download

memory/4900-7-0x00000189E6470000-0x00000189E6492000-memory.dmp

Download

memory/4900-8-0x00007FFFB8380000-0x00007FFFB8E42000-memory.dmp

Download