Analysis Overview
SHA256
4fc821f8e0fab3f4f3c9698a75cd2e92a098c1a8552e52297d7e4a5d32d6a8a4
Threat Level: Known bad
The file 2024-02-23_92aa3dfa8691f919541fd84daea2717a_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 WriteProcessMemory
Suspicious use of UnmapMainImage
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-23 12:50
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: behavioral2
Detonation Overview
Submitted
2024-02-23 12:50
Reported
2024-02-23 12:52
Platform
win10v2004-20240221-en
Max time kernel
152s
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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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 632 wrote to memory of 3576 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 632 wrote to memory of 3576 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 632 wrote to memory of 3576 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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 | 19.53.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 210.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.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 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.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 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | 190.178.17.96.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 | 31.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | 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 | 10.73.50.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
| US | 8.8.8.8:53 | storage-cabinets.info | udp |
Files
memory/632-0-0x0000000002190000-0x0000000002196000-memory.dmp
memory/632-1-0x0000000002190000-0x0000000002196000-memory.dmp
memory/632-2-0x0000000000400000-0x0000000000406000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\retln.exe
| MD5 | 485c41fa1d2f63d1421170405104642b |
| SHA1 | c521545aa3b4aaffe42d499dbffc3b21760e966c |
| SHA256 | d982d00f1d89802c5bfe978550ccae63afff54faea5d4222ccd53d9171f6e8e9 |
| SHA512 | a2caede05142b57b86cdf9ee54e6f660401b592729efaccba76085b090905035be8d9dd8bd33bdc795b7033d014f4199c0534844931ca185f63e0976d5cc25ba |
memory/3576-19-0x0000000002210000-0x0000000002216000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-23 12:50
Reported
2024-02-23 12:52
Platform
win7-20240221-en
Max time kernel
10s
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\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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_92aa3dfa8691f919541fd84daea2717a_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 2120 wrote to memory of 2124 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 2120 wrote to memory of 2124 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 2120 wrote to memory of 2124 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
| PID 2120 wrote to memory of 2124 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe | C:\Users\Admin\AppData\Local\Temp\retln.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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/2120-3-0x0000000000270000-0x0000000000276000-memory.dmp
memory/2120-1-0x0000000000400000-0x0000000000406000-memory.dmp
memory/2120-0-0x0000000000270000-0x0000000000276000-memory.dmp
\Users\Admin\AppData\Local\Temp\retln.exe
| MD5 | 485c41fa1d2f63d1421170405104642b |
| SHA1 | c521545aa3b4aaffe42d499dbffc3b21760e966c |
| SHA256 | d982d00f1d89802c5bfe978550ccae63afff54faea5d4222ccd53d9171f6e8e9 |
| SHA512 | a2caede05142b57b86cdf9ee54e6f660401b592729efaccba76085b090905035be8d9dd8bd33bdc795b7033d014f4199c0534844931ca185f63e0976d5cc25ba |
memory/2124-16-0x0000000000260000-0x0000000000266000-memory.dmp