Analysis Overview
SHA256
cf6a5918ae91f2ed5b91b5dbe28f4b1ef985416019099c542fb84360b7ff1283
Threat Level: Likely malicious
The file c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.zip was found to be: Likely malicious.
Malicious Activity Summary
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Checks BIOS information in registry
Themida packer
Checks whether UAC is enabled
Drops desktop.ini file(s)
Suspicious use of NtSetInformationThreadHideFromDebugger
Program crash
Unsigned PE
Uses Volume Shadow Copy service COM API
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Opens file in notepad (likely ransom note)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-11 07:51
Signatures
Themida packer
| 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
2024-06-11 07:51
Reported
2024-06-11 07:54
Platform
win7-20240221-en
Max time kernel
119s
Max time network
120s
Command Line
Signatures
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Themida packer
| 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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File opened for modification | C:\$Recycle.Bin\S-1-5-21-2297530677-1229052932-2803917579-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
| File opened for modification | F:\$RECYCLE.BIN\S-1-5-21-2297530677-1229052932-2803917579-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe
"C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
Files
memory/2952-0-0x0000000000840000-0x0000000000FB6000-memory.dmp
memory/2952-1-0x0000000077C00000-0x0000000077C02000-memory.dmp
memory/2952-2-0x0000000000840000-0x0000000000FB6000-memory.dmp
memory/2952-4-0x0000000000840000-0x0000000000FB6000-memory.dmp
memory/2952-7-0x0000000000840000-0x0000000000FB6000-memory.dmp
memory/2952-8-0x0000000000840000-0x0000000000FB6000-memory.dmp
memory/2952-6-0x0000000000840000-0x0000000000FB6000-memory.dmp
memory/2952-5-0x0000000000840000-0x0000000000FB6000-memory.dmp
memory/2952-3-0x0000000000840000-0x0000000000FB6000-memory.dmp
C:\$Recycle.Bin\S-1-5-21-2297530677-1229052932-2803917579-1000\D
| MD5 | 5f54d1240735d46980b776af554f44d3 |
| SHA1 | acf7707c08973ddfdb27cd361442ccfba355c888 |
| SHA256 | 2c80619d7e7c58257293cda3a878c13e5856f4e06f6f90601276f7b9179c9e07 |
| SHA512 | b1f542f68a48608ae53904fbe2105bd8f3e544941abb38ec9d24cb7a26f916ef94cfb431cce0c64077dc2934913130d78492914a5e9ffc52f311e68217caef15 |
C:\Users\Admin\Videos\CBhwKBgQD.README.txt
| MD5 | 61c324611e6b2e1b180664f7a7982a7e |
| SHA1 | 2fd5af80cbe4c805edc71f1d29fd442eabf7109f |
| SHA256 | cfac38a276ea508da50703915692cb8bd9d734ce74dc051239beb68cf89b2b37 |
| SHA512 | 7ec1f946f8f659994899c6b8c9b2e6af61d763882dc419e3e18bf98b5884cfdae16e09c27d308ae022df51ec1ed2e3e9b38e970c94c473669f702c33b4876378 |
memory/2952-607-0x0000000000840000-0x0000000000FB6000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-11 07:51
Reported
2024-06-11 07:52
Platform
win10v2004-20240426-en
Max time kernel
16s
Max time network
21s
Command Line
Signatures
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Themida packer
| 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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File opened for modification | C:\$Recycle.Bin\S-1-5-21-1162180587-977231257-2194346871-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
| File opened for modification | F:\$RECYCLE.BIN\S-1-5-21-1162180587-977231257-2194346871-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe |
Opens file in notepad (likely ransom note)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\NOTEPAD.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
Processes
C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe
"C:\Users\Admin\AppData\Local\Temp\c33acab1ddbee95302f0d54feb1c49c40dec807cec251fb6d30d056f571155e0.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4028 -ip 4028
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 884
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\CBhwKBgQD.README.txt
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 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.121.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
Files
memory/4028-0-0x00000000008E0000-0x0000000001056000-memory.dmp
memory/4028-1-0x0000000077864000-0x0000000077866000-memory.dmp
memory/4028-2-0x00000000008E0000-0x0000000001056000-memory.dmp
memory/4028-3-0x00000000008E0000-0x0000000001056000-memory.dmp
memory/4028-8-0x00000000008E0000-0x0000000001056000-memory.dmp
memory/4028-6-0x00000000008E0000-0x0000000001056000-memory.dmp
memory/4028-5-0x00000000008E0000-0x0000000001056000-memory.dmp
memory/4028-7-0x00000000008E0000-0x0000000001056000-memory.dmp
memory/4028-4-0x00000000008E0000-0x0000000001056000-memory.dmp
C:\$Recycle.Bin\S-1-5-21-1162180587-977231257-2194346871-1000\A
| MD5 | 5f54d1240735d46980b776af554f44d3 |
| SHA1 | acf7707c08973ddfdb27cd361442ccfba355c888 |
| SHA256 | 2c80619d7e7c58257293cda3a878c13e5856f4e06f6f90601276f7b9179c9e07 |
| SHA512 | b1f542f68a48608ae53904fbe2105bd8f3e544941abb38ec9d24cb7a26f916ef94cfb431cce0c64077dc2934913130d78492914a5e9ffc52f311e68217caef15 |
C:\Users\Admin\Searches\CBhwKBgQD.README.txt
| MD5 | 61c324611e6b2e1b180664f7a7982a7e |
| SHA1 | 2fd5af80cbe4c805edc71f1d29fd442eabf7109f |
| SHA256 | cfac38a276ea508da50703915692cb8bd9d734ce74dc051239beb68cf89b2b37 |
| SHA512 | 7ec1f946f8f659994899c6b8c9b2e6af61d763882dc419e3e18bf98b5884cfdae16e09c27d308ae022df51ec1ed2e3e9b38e970c94c473669f702c33b4876378 |
memory/4028-1342-0x00000000008E0000-0x0000000001056000-memory.dmp