Analysis Overview
SHA256
809ccbd6dc5ce0e1e654f8dc89aa5de50e3bebc9bd6d5c69259eecf9240d8a43
Threat Level: Known bad
The file KarolinaUtility.exe was found to be: Known bad.
Malicious Activity Summary
njRAT/Bladabindi
Modifies Windows Firewall
Executes dropped EXE
Drops startup file
Suspicious use of NtSetInformationThreadHideFromDebugger
Drops file in System32 directory
Drops file in Program Files directory
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
Checks SCSI registry key(s)
Modifies data under HKEY_USERS
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of FindShellTrayWindow
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-28 12:37
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-28 12:37
Reported
2024-04-28 12:38
Platform
win10-20240404-en
Max time kernel
61s
Max time network
62s
Command Line
Signatures
njRAT/Bladabindi
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9832c3e9cd3e821e5314be8029b17d5eWindows Update.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9832c3e9cd3e821e5314be8029b17d5eWindows Update.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\Explower.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\Explower.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\KarolinaUtility.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Program Files (x86)\Explower.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File created | C:\Program Files (x86)\Explower.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\rescache\_merged\4183903823\2290032291.pri | C:\Windows\system32\taskmgr.exe | N/A |
| File created | C:\Windows\rescache\_merged\1601268389\715946058.pri | C:\Windows\system32\taskmgr.exe | 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_QEMU&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&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_QEMU&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | 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 |
| 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\DWM\ColorizationColor = "3288365271" | 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\EnableWindowColorization = "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\DWM | 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\ColorizationAfterglowBalance = "10" | 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\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" | 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\ColorizationBlurBalance = "1" | 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\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" | C:\Windows\system32\LogonUI.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\KarolinaUtility.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Windows\system32\LogonUI.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\KarolinaUtility.exe
"C:\Users\Admin\AppData\Local\Temp\KarolinaUtility.exe"
C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
C:\Windows\SysWOW64\netsh.exe
netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3a9c055 /state1:0x41c64e6d
Network
| Country | Destination | Domain | Proto |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| N/A | 127.0.0.1:13595 | tcp | |
| US | 8.8.8.8:53 | udp |
Files
memory/204-0-0x0000000000CE0000-0x0000000001060000-memory.dmp
memory/204-1-0x0000000073DE0000-0x0000000074390000-memory.dmp
memory/204-3-0x0000000003250000-0x0000000003260000-memory.dmp
memory/204-2-0x0000000073DE0000-0x0000000074390000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\server.exe
| MD5 | b1fd40e0d774fc34ca7e3f19aabf6ab1 |
| SHA1 | 938e853894b0d5f157557bedfa531d49c1771f99 |
| SHA256 | 809ccbd6dc5ce0e1e654f8dc89aa5de50e3bebc9bd6d5c69259eecf9240d8a43 |
| SHA512 | d70f95b2bff8af647115cb958180f1ef327ad57f48f22a4113480bd818005de55f2457c381c9486adb21e2340efe56dc2803a21ecb55075b8e1a5e1513b946c2 |
memory/3032-12-0x0000000000950000-0x0000000000CD0000-memory.dmp
memory/204-13-0x0000000000CE0000-0x0000000001060000-memory.dmp
memory/204-14-0x0000000073DE0000-0x0000000074390000-memory.dmp
memory/3032-17-0x0000000073DE0000-0x0000000074390000-memory.dmp
memory/3032-16-0x0000000003AA0000-0x0000000003AB0000-memory.dmp
memory/3032-15-0x0000000073DE0000-0x0000000074390000-memory.dmp
C:\Users\Admin\AppData\Roaming\app
| MD5 | 7eb860abfe2281298575b5216ef42bc6 |
| SHA1 | d4dfd7ac22dcd07da34306c40b4e5367a969cda5 |
| SHA256 | 83d46461bf45f00cb4fc5df9679b2bd82dbf54eeb022ca1711eefb4b2e7b7689 |
| SHA512 | 427bfc41f0514ee10d400eea38f22f6fac6f9d5ecd84ad7adb1161ff9355e47c04ff411e172fafcd23c137ad1528ed2f2cb95d247613ae5550c089633f18994d |
memory/3032-45-0x0000000000950000-0x0000000000CD0000-memory.dmp
memory/3032-47-0x0000000003AA0000-0x0000000003AB0000-memory.dmp
memory/3032-46-0x0000000073DE0000-0x0000000074390000-memory.dmp
memory/3032-59-0x0000000000950000-0x0000000000CD0000-memory.dmp
memory/3032-60-0x0000000073DE0000-0x0000000074390000-memory.dmp