Analysis Overview
SHA256
33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81
Threat Level: Likely malicious
The file 33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81 was found to be: Likely malicious.
Malicious Activity Summary
Detects executables containing base64 encoded User Agent
Blocklisted process makes network request
Reads user/profile data of web browsers
Adds Run key to start application
Enumerates connected drives
Writes to the Master Boot Record (MBR)
Unsigned PE
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-07 19:57
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-07 19:57
Reported
2024-04-07 20:00
Platform
win7-20240215-en
Max time kernel
140s
Max time network
149s
Command Line
Signatures
Detects executables containing base64 encoded User Agent
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Blocklisted process makes network request
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\gc = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll\",GetColor" | C:\Windows\SysWOW64\rundll32.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\h: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\j: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\n: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\q: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\s: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\u: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\x: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\b: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\i: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\k: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\l: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\p: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\r: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\t: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\w: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\g: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\m: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\a: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\e: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\o: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\v: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\y: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\z: | C:\Windows\SysWOW64\rundll32.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PHYSICALDRIVE0 | C:\Windows\SysWOW64\rundll32.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1512 wrote to memory of 2336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1512 wrote to memory of 2336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1512 wrote to memory of 2336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1512 wrote to memory of 2336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1512 wrote to memory of 2336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1512 wrote to memory of 2336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1512 wrote to memory of 2336 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll,#1
Network
| Country | Destination | Domain | Proto |
| US | 174.139.6.44:803 | tcp | |
| US | 107.163.56.110:18530 | 107.163.56.110 | tcp |
| US | 174.139.6.44:803 | tcp | |
| US | 174.139.6.42:3204 | tcp | |
| US | 174.139.6.43:805 | tcp | |
| US | 174.139.6.43:805 | tcp | |
| US | 174.139.6.43:805 | tcp | |
| US | 174.139.6.43:805 | tcp | |
| US | 174.139.6.42:3204 | tcp | |
| US | 174.139.6.42:3204 | tcp | |
| US | 174.139.6.42:3204 | tcp |
Files
memory/2336-0-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-1-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-2-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-4-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-3-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-5-0x0000000000190000-0x0000000000192000-memory.dmp
memory/2336-6-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-7-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-11-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2336-12-0x0000000010000000-0x000000001004E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 19:57
Reported
2024-04-07 20:00
Platform
win10v2004-20240226-en
Max time kernel
148s
Max time network
151s
Command Line
Signatures
Detects executables containing base64 encoded User Agent
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Blocklisted process makes network request
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gc = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll\",GetColor" | C:\Windows\SysWOW64\rundll32.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\u: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\x: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\z: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\h: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\i: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\o: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\q: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\l: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\v: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\b: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\g: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\j: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\k: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\m: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\n: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\p: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\r: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\w: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\y: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\a: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\e: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\s: | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\t: | C:\Windows\SysWOW64\rundll32.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PHYSICALDRIVE0 | C:\Windows\SysWOW64\rundll32.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3668 wrote to memory of 3052 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3668 wrote to memory of 3052 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3668 wrote to memory of 3052 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll,#1
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 174.139.6.44:803 | tcp | |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 107.163.56.110:18530 | 107.163.56.110 | tcp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 110.56.163.107.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 174.139.6.42:3204 | tcp | |
| US | 174.139.6.43:805 | tcp | |
| US | 174.139.6.43:805 | tcp | |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 98.56.20.217.in-addr.arpa | udp |
| US | 174.139.6.43:805 | tcp | |
| US | 174.139.6.42:3204 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 174.139.6.42:3204 | tcp | |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 99.56.20.217.in-addr.arpa | udp |
| US | 174.139.6.42:3204 | tcp | |
| US | 174.139.6.42:3204 | tcp |
Files
memory/3052-0-0x0000000010000000-0x000000001004E000-memory.dmp
memory/3052-1-0x0000000010000000-0x000000001004E000-memory.dmp
memory/3052-2-0x0000000000C90000-0x0000000000C92000-memory.dmp
memory/3052-3-0x0000000010000000-0x000000001004E000-memory.dmp
memory/3052-4-0x0000000010000000-0x000000001004E000-memory.dmp
memory/3052-6-0x0000000010000000-0x000000001004E000-memory.dmp
memory/3052-8-0x0000000010000000-0x000000001004E000-memory.dmp