Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-ltsc 2021_x64 -
resource
win10ltsc2021-20241023-en -
resource tags
arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system -
submitted
20-11-2024 19:22
Behavioral task
behavioral1
Sample
mrpersonisabigfatskid.exe
Resource
win10ltsc2021-20241023-en
windows10-ltsc 2021-x64
General
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Target
mrpersonisabigfatskid.exe
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Size
41KB
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MD5
83325ba20e90b7f81fb69a030fe99b79
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SHA1
d4142e85b70bd70e97bfb6258cf84427ce79eea6
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SHA256
91456e4547509c9ddc330deb70e5dd27b5832e00a7e851591c702737327c16fa
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SHA512
52441bec8495436e92281081e3dc8ddfb55f73c7aedb52564f6bb92a36380f286f4379da106f93178f58925690e537ba11d05a4b8cf3847bd4bc1786d13c8629
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SSDEEP
768:treDweeLOoHdSgDdeLhXvgggCLJF5PG9pmS6vOwh/3Emzf:YDweQldSgDItXvvgcFI9AS6vOwp9D
Malware Config
Extracted
xworm
5.0
10.9.248.138:29647
uB9wPEusM22Q2JdW
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Install_directory
%AppData%
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install_file
$77MicrosoftDefender.exe
Signatures
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Detect Xworm Payload 2 IoCs
resource yara_rule behavioral1/memory/2560-1-0x0000000000290000-0x00000000002A0000-memory.dmp family_xworm behavioral1/files/0x002d00000004502f-61.dat family_xworm -
Xworm family
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Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 1944 powershell.exe 1492 powershell.exe 3856 powershell.exe 4396 powershell.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3495501434-311648039-2993076821-1000\Control Panel\International\Geo\Nation mrpersonisabigfatskid.exe -
Drops startup file 2 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk mrpersonisabigfatskid.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk mrpersonisabigfatskid.exe -
Executes dropped EXE 3 IoCs
pid Process 4648 $77MicrosoftDefender.exe 4952 $77MicrosoftDefender.exe 2752 $77MicrosoftDefender.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3495501434-311648039-2993076821-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77MicrosoftDefender = "C:\\Users\\Admin\\AppData\\Roaming\\$77MicrosoftDefender.exe" mrpersonisabigfatskid.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 17 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName taskmgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000 taskmgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A taskmgr.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4944 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4396 powershell.exe 4396 powershell.exe 1944 powershell.exe 1944 powershell.exe 1492 powershell.exe 1492 powershell.exe 3856 powershell.exe 3856 powershell.exe 2560 mrpersonisabigfatskid.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 2560 mrpersonisabigfatskid.exe Token: SeDebugPrivilege 4396 powershell.exe Token: SeIncreaseQuotaPrivilege 4396 powershell.exe Token: SeSecurityPrivilege 4396 powershell.exe Token: SeTakeOwnershipPrivilege 4396 powershell.exe Token: SeLoadDriverPrivilege 4396 powershell.exe Token: SeSystemProfilePrivilege 4396 powershell.exe Token: SeSystemtimePrivilege 4396 powershell.exe Token: SeProfSingleProcessPrivilege 4396 powershell.exe Token: SeIncBasePriorityPrivilege 4396 powershell.exe Token: SeCreatePagefilePrivilege 4396 powershell.exe Token: SeBackupPrivilege 4396 powershell.exe Token: SeRestorePrivilege 4396 powershell.exe Token: SeShutdownPrivilege 4396 powershell.exe Token: SeDebugPrivilege 4396 powershell.exe Token: SeSystemEnvironmentPrivilege 4396 powershell.exe Token: SeRemoteShutdownPrivilege 4396 powershell.exe Token: SeUndockPrivilege 4396 powershell.exe Token: SeManageVolumePrivilege 4396 powershell.exe Token: 33 4396 powershell.exe Token: 34 4396 powershell.exe Token: 35 4396 powershell.exe Token: 36 4396 powershell.exe Token: SeDebugPrivilege 1944 powershell.exe Token: SeIncreaseQuotaPrivilege 1944 powershell.exe Token: SeSecurityPrivilege 1944 powershell.exe Token: SeTakeOwnershipPrivilege 1944 powershell.exe Token: SeLoadDriverPrivilege 1944 powershell.exe Token: SeSystemProfilePrivilege 1944 powershell.exe Token: SeSystemtimePrivilege 1944 powershell.exe Token: SeProfSingleProcessPrivilege 1944 powershell.exe Token: SeIncBasePriorityPrivilege 1944 powershell.exe Token: SeCreatePagefilePrivilege 1944 powershell.exe Token: SeBackupPrivilege 1944 powershell.exe Token: SeRestorePrivilege 1944 powershell.exe Token: SeShutdownPrivilege 1944 powershell.exe Token: SeDebugPrivilege 1944 powershell.exe Token: SeSystemEnvironmentPrivilege 1944 powershell.exe Token: SeRemoteShutdownPrivilege 1944 powershell.exe Token: SeUndockPrivilege 1944 powershell.exe Token: SeManageVolumePrivilege 1944 powershell.exe Token: 33 1944 powershell.exe Token: 34 1944 powershell.exe Token: 35 1944 powershell.exe Token: 36 1944 powershell.exe Token: SeDebugPrivilege 1492 powershell.exe Token: SeIncreaseQuotaPrivilege 1492 powershell.exe Token: SeSecurityPrivilege 1492 powershell.exe Token: SeTakeOwnershipPrivilege 1492 powershell.exe Token: SeLoadDriverPrivilege 1492 powershell.exe Token: SeSystemProfilePrivilege 1492 powershell.exe Token: SeSystemtimePrivilege 1492 powershell.exe Token: SeProfSingleProcessPrivilege 1492 powershell.exe Token: SeIncBasePriorityPrivilege 1492 powershell.exe Token: SeCreatePagefilePrivilege 1492 powershell.exe Token: SeBackupPrivilege 1492 powershell.exe Token: SeRestorePrivilege 1492 powershell.exe Token: SeShutdownPrivilege 1492 powershell.exe Token: SeDebugPrivilege 1492 powershell.exe Token: SeSystemEnvironmentPrivilege 1492 powershell.exe Token: SeRemoteShutdownPrivilege 1492 powershell.exe Token: SeUndockPrivilege 1492 powershell.exe Token: SeManageVolumePrivilege 1492 powershell.exe Token: 33 1492 powershell.exe -
Suspicious use of FindShellTrayWindow 64 IoCs
pid Process 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe -
Suspicious use of SendNotifyMessage 64 IoCs
pid Process 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe 3504 taskmgr.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2560 mrpersonisabigfatskid.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 2560 wrote to memory of 4396 2560 mrpersonisabigfatskid.exe 86 PID 2560 wrote to memory of 4396 2560 mrpersonisabigfatskid.exe 86 PID 2560 wrote to memory of 1944 2560 mrpersonisabigfatskid.exe 90 PID 2560 wrote to memory of 1944 2560 mrpersonisabigfatskid.exe 90 PID 2560 wrote to memory of 1492 2560 mrpersonisabigfatskid.exe 94 PID 2560 wrote to memory of 1492 2560 mrpersonisabigfatskid.exe 94 PID 2560 wrote to memory of 3856 2560 mrpersonisabigfatskid.exe 96 PID 2560 wrote to memory of 3856 2560 mrpersonisabigfatskid.exe 96 PID 2560 wrote to memory of 4944 2560 mrpersonisabigfatskid.exe 98 PID 2560 wrote to memory of 4944 2560 mrpersonisabigfatskid.exe 98 -
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.
Processes
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C:\Users\Admin\AppData\Local\Temp\mrpersonisabigfatskid.exe"C:\Users\Admin\AppData\Local\Temp\mrpersonisabigfatskid.exe"1⤵
- Checks computer location settings
- 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:2560 -
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\mrpersonisabigfatskid.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4396
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'mrpersonisabigfatskid.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1944
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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\Roaming\$77MicrosoftDefender.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1492
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77MicrosoftDefender.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
PID:3856
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77MicrosoftDefender" /tr "C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"2⤵
- Scheduled Task/Job: Scheduled Task
PID:4944
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C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"1⤵
- Executes dropped EXE
PID:4648
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:3504
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C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"1⤵
- Executes dropped EXE
PID:4952
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C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"1⤵
- Executes dropped EXE
PID:2752
Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
654B
MD511c6e74f0561678d2cf7fc075a6cc00c
SHA1535ee79ba978554abcb98c566235805e7ea18490
SHA256d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63
SHA51232c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0
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Filesize
3KB
MD53eb3833f769dd890afc295b977eab4b4
SHA1e857649b037939602c72ad003e5d3698695f436f
SHA256c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485
SHA512c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72
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Filesize
1KB
MD526c94c408a5a2e1e04f1191fc2902d3e
SHA1ce50b153be03511bd62a477abf71a7e9f94e68a5
SHA25686ad00a425874b935cc725f83780add09d08d7dc9cbfb705821955fe937c05ec
SHA51270e7bc620b369d7d0fcf06f93da000819bf089a502f1014641ad14d56ead22f31c25b97363296fd3749c63bde6db3bf115b33504b160485d792e1331c337b586
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Filesize
1KB
MD5dbc7e71d4d150ccfefe2f0aeea0f4b88
SHA10bd7c87aac1cdfadc651eeea85d888b96f7e3c4c
SHA25641a20dea317c2164b772f7c33e97f316e3cec5a288a9b5d2ac03b30eb4c4d359
SHA512a39adb3f7172b7ae0fc1e28c386c894e5571429a169a4d8bc0aa2e25f1c91807242fca5b5b206374f851bdca1ac58cdafd827e1ea6f3ad0137e1d1bde14548e0
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Filesize
1KB
MD5214a202dda1c0251b232c3996b4a7dce
SHA19059f740a079e7d2165f5daff69c7be8df48f5f4
SHA256998a8c155009a2ce0a68d39747d665d7489fe02dc095796c4afad46957edc60f
SHA512114518c031f03eb931be55ac30c27d432e4f3beb2a42b519071ce636f6df666c8596f503c95fd548912537768e6a08fa14a4c6dad8c9c187dad605e7661a26b0
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
41KB
MD583325ba20e90b7f81fb69a030fe99b79
SHA1d4142e85b70bd70e97bfb6258cf84427ce79eea6
SHA25691456e4547509c9ddc330deb70e5dd27b5832e00a7e851591c702737327c16fa
SHA51252441bec8495436e92281081e3dc8ddfb55f73c7aedb52564f6bb92a36380f286f4379da106f93178f58925690e537ba11d05a4b8cf3847bd4bc1786d13c8629
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk
Filesize838B
MD54455333ce33242b808e5b8c117a531d8
SHA1f8c2cba20021c2ac9aac3f4c651bb80919b4299f
SHA2562cf08eb7b4249675b4863d1f303ed0f0cde17888f9b3a0cb663c55e967b1ea24
SHA5129f491a921c001ccce1324c010e9a74c7499bc75de75d6a02f5a8e755b8cfcca33b8bf7affd369b82998d9a11102a4e37d10c23ba11634c995bd4c98d74364e4c