Analysis Overview
SHA256
fcb5bc70a3b13a8135442a155b8f999581767d84b8cf3557dc6bab6306185ca7
Threat Level: Known bad
The file 2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_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
Enumerates physical storage devices
Unsigned PE
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-23 12:27
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
2024-02-23 12:27
Reported
2024-02-23 12:30
Platform
win7-20240221-en
Max time kernel
3s
Max time network
71s
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\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_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\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_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 3068 wrote to memory of 1988 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 3068 wrote to memory of 1988 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 3068 wrote to memory of 1988 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 3068 wrote to memory of 1988 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_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/3068-0-0x00000000003F0000-0x00000000003F6000-memory.dmp
memory/3068-1-0x0000000000400000-0x0000000000406000-memory.dmp
memory/3068-8-0x00000000003F0000-0x00000000003F6000-memory.dmp
\Users\Admin\AppData\Local\Temp\retln.exe
| MD5 | 7d40a10a9bb27fd90e190868a844a024 |
| SHA1 | 23d24b050f577c6e3e0eced626c43e7dcbd9a4b3 |
| SHA256 | 5837ded4dfaef4379e46713d72516953a87b2a49adc2e51ecc710066eb494c64 |
| SHA512 | ebb36f7a13068c188d25019098d5f9f94b83a2f95f4ed548cc243eee578c2fa99054ce30f673cb2fdbd3f06cdd4020b746e4479c8cf3ffed30ccf6886e2121ec |
memory/1988-23-0x0000000000280000-0x0000000000286000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-23 12:27
Reported
2024-02-23 12:30
Platform
win10v2004-20240221-en
Max time kernel
145s
Max time network
150s
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-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_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 3288 wrote to memory of 456 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 3288 wrote to memory of 456 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 3288 wrote to memory of 456 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_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 |
| US | 8.8.8.8:53 | 16.53.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 176.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.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 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.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 | 172.178.17.96.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 | 19.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.178.17.96.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 | 48.192.11.51.in-addr.arpa | udp |
Files
memory/3288-0-0x0000000002350000-0x0000000002356000-memory.dmp
memory/3288-1-0x0000000002350000-0x0000000002356000-memory.dmp
memory/3288-2-0x0000000000400000-0x0000000000406000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\retln.exe
| MD5 | 7d40a10a9bb27fd90e190868a844a024 |
| SHA1 | 23d24b050f577c6e3e0eced626c43e7dcbd9a4b3 |
| SHA256 | 5837ded4dfaef4379e46713d72516953a87b2a49adc2e51ecc710066eb494c64 |
| SHA512 | ebb36f7a13068c188d25019098d5f9f94b83a2f95f4ed548cc243eee578c2fa99054ce30f673cb2fdbd3f06cdd4020b746e4479c8cf3ffed30ccf6886e2121ec |
memory/456-20-0x0000000000750000-0x0000000000756000-memory.dmp