Analysis Overview
SHA256
4a75f2db1dbd3c1218bb9994b7e1c690c4edd4e0c1a675de8d2a127611173e69
Threat Level: Known bad
The file MrsMajor3.0.exe was found to be: Known bad.
Malicious Activity Summary
UAC bypass
Executes dropped EXE
Obfuscated with Agile.Net obfuscator
Checks computer location settings
Loads dropped DLL
Unsigned PE
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Checks processor information in registry
Checks SCSI registry key(s)
Suspicious use of WriteProcessMemory
System policy modification
Suspicious use of SendNotifyMessage
Suspicious use of FindShellTrayWindow
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-13 16:47
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-13 16:47
Reported
2024-04-13 16:49
Platform
win10v2004-20240226-en
Max time kernel
59s
Max time network
64s
Command Line
Signatures
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" | C:\Windows\system32\wscript.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation | C:\Windows\system32\wscript.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe | N/A |
Obfuscated with Agile.Net obfuscator
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Enumerates physical storage devices
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\system32\taskmgr.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" | C:\Windows\system32\LogonUI.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" | C:\Windows\system32\LogonUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "221" | C:\Windows\system32\LogonUI.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeCreateGlobalPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\LogonUI.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4176 wrote to memory of 2388 | N/A | C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe | C:\Windows\system32\wscript.exe |
| PID 4176 wrote to memory of 2388 | N/A | C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe | C:\Windows\system32\wscript.exe |
| PID 2388 wrote to memory of 5060 | N/A | C:\Windows\system32\wscript.exe | C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe |
| PID 2388 wrote to memory of 5060 | N/A | C:\Windows\system32\wscript.exe | C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe |
System policy modification
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System | C:\Windows\system32\wscript.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" | C:\Windows\system32\wscript.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe
"C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe"
C:\Windows\system32\wscript.exe
"C:\Windows\system32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\F9E2.tmp\F9E3.vbs //Nologo
C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe
"C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe"
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa394e855 /state1:0x41c64e6d
Network
| Country | Destination | Domain | Proto |
| GB | 142.250.187.234:443 | tcp | |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 42.140.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 4.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 13.107.253.64:443 | tcp | |
| US | 8.8.8.8:53 | 98.58.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 170.117.168.52.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\F9E2.tmp\F9E3.vbs
| MD5 | 3b8696ecbb737aad2a763c4eaf62c247 |
| SHA1 | 4a2d7a2d61d3f4c414b4e5d2933cd404b8f126e5 |
| SHA256 | ce95f7eea8b303bc23cfd6e41748ad4e7b5e0f0f1d3bdf390eadb1e354915569 |
| SHA512 | 713d9697b892b9dd892537e8a01eab8d0265ebf64867c8beecf7a744321257c2a5c11d4de18fcb486bb69f199422ce3cab8b6afdbe880481c47b06ba8f335beb |
C:\Users\Admin\AppData\Local\Temp\F9E1.tmp\eulascr.exe
| MD5 | 8b1c352450e480d9320fce5e6f2c8713 |
| SHA1 | d6bd88bf33de7c5d4e68b233c37cc1540c97bd3a |
| SHA256 | 2c343174231b55e463ca044d19d47bd5842793c15954583eb340bfd95628516e |
| SHA512 | 2d8e43b1021da08ed1bf5aff110159e6bc10478102c024371302ccfce595e77fd76794658617b5b52f9a50190db250c1ba486d247d9cd69e4732a768edbb4cbc |
memory/5060-8-0x0000000000C20000-0x0000000000C4A000-memory.dmp
memory/5060-9-0x00007FFD3FDC0000-0x00007FFD40881000-memory.dmp
memory/5060-11-0x000000001B890000-0x000000001B8A0000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\5a530dfd-bc51-4992-a05d-f09d41a331d4\AgileDotNetRT64.dll
| MD5 | 42b2c266e49a3acd346b91e3b0e638c0 |
| SHA1 | 2bc52134f03fcc51cb4e0f6c7cf70646b4df7dd1 |
| SHA256 | adeed015f06efa363d504a18acb671b1db4b20b23664a55c9bc28aef3283ca29 |
| SHA512 | 770822fd681a1d98afe03f6fbe5f116321b54c8e2989fb07491811fd29fca5b666f1adf4c6900823af1271e342cacc9293e9db307c4eef852d1a253b00347a81 |
memory/5060-17-0x00007FFD3E670000-0x00007FFD3E7BE000-memory.dmp
memory/5060-18-0x000000001B890000-0x000000001B8A0000-memory.dmp
memory/5060-19-0x000000001DC90000-0x000000001DE52000-memory.dmp
memory/5060-20-0x000000001E390000-0x000000001E8B8000-memory.dmp
memory/3332-21-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-22-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-23-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-30-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-32-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-31-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-29-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-28-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-27-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/3332-33-0x0000026EB8D00000-0x0000026EB8D01000-memory.dmp
memory/5060-34-0x00007FFD3FDC0000-0x00007FFD40881000-memory.dmp
memory/5060-35-0x000000001B890000-0x000000001B8A0000-memory.dmp
memory/5060-36-0x000000001B890000-0x000000001B8A0000-memory.dmp
memory/5060-37-0x00007FFD3FDC0000-0x00007FFD40881000-memory.dmp