Analysis Overview
SHA256
58bb3931e32bd0e05923489f47755c4f4e8c4ae2ca3f0b64aa4699508292e340
Threat Level: Known bad
The file 2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker was found to be: Known bad.
Malicious Activity Summary
Detection of CryptoLocker Variants
Detection of CryptoLocker Variants
Executes dropped EXE
Checks computer location settings
Loads dropped DLL
Creates a large amount of network flows
Unsigned PE
Enumerates physical storage devices
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-28 00:55
Signatures
Detection of CryptoLocker Variants
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-28 00:55
Reported
2024-05-28 00:57
Platform
win7-20240508-en
Max time kernel
14s
Max time network
121s
Command Line
Signatures
Detection of CryptoLocker Variants
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\retln.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | N/A |
Creates a large amount of network flows
Enumerates physical storage devices
Suspicious use of UnmapMainImage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\retln.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 848 wrote to memory of 1808 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 848 wrote to memory of 1808 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 848 wrote to memory of 1808 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 848 wrote to memory of 1808 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe"
C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
Files
memory/848-8-0x00000000003F0000-0x00000000003F6000-memory.dmp
memory/848-1-0x0000000000400000-0x0000000000406000-memory.dmp
memory/848-0-0x00000000003F0000-0x00000000003F6000-memory.dmp
\Users\Admin\AppData\Local\Temp\retln.exe
| MD5 | 18cdfca6b82c63cebf7c44f4367161de |
| SHA1 | 1ca476fcd4906d095a7ecdf8eeb2a1e2f6f9ef54 |
| SHA256 | 81f92df47c58da83cc3e7a2132d8910a5ee4a07837e992d63481625723f7c813 |
| SHA512 | ce63abee689bfd6b4c49f5aa8dc31ea97d0be95afdea08e94541225ea35d4c3619f0bd43c82ae8611158e6fd60430f0aa16106951d6edf5132ada9568870a2df |
memory/1808-23-0x0000000000380000-0x0000000000386000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-28 00:55
Reported
2024-05-28 00:57
Platform
win10v2004-20240508-en
Max time kernel
150s
Max time network
156s
Command Line
Signatures
Detection of CryptoLocker Variants
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\retln.exe | N/A |
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1364 wrote to memory of 180 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 1364 wrote to memory of 180 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 1364 wrote to memory of 180 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe"
C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| NL | 23.62.61.97:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | 21.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
Files
memory/1364-0-0x0000000002150000-0x0000000002156000-memory.dmp
memory/1364-8-0x0000000002150000-0x0000000002156000-memory.dmp
memory/1364-1-0x0000000000400000-0x0000000000406000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\retln.exe
| MD5 | 18cdfca6b82c63cebf7c44f4367161de |
| SHA1 | 1ca476fcd4906d095a7ecdf8eeb2a1e2f6f9ef54 |
| SHA256 | 81f92df47c58da83cc3e7a2132d8910a5ee4a07837e992d63481625723f7c813 |
| SHA512 | ce63abee689bfd6b4c49f5aa8dc31ea97d0be95afdea08e94541225ea35d4c3619f0bd43c82ae8611158e6fd60430f0aa16106951d6edf5132ada9568870a2df |
memory/180-25-0x0000000002020000-0x0000000002026000-memory.dmp