Analysis Overview
SHA256
f5f0bd9714c7b145305035b817957668e9ac5f1aac855ae82a638011e6860488
Threat Level: Known bad
The file a2a9aa7d747dc872400ced400f162bfa was found to be: Known bad.
Malicious Activity Summary
Darkcomet
Modifies WinLogon for persistence
Checks BIOS information in registry
Adds Run key to start application
Suspicious use of SetThreadContext
Program crash
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Checks processor information in registry
Suspicious use of FindShellTrayWindow
Suspicious use of AdjustPrivilegeToken
Enumerates system info in registry
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-24 20:19
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-24 20:19
Reported
2024-02-24 20:22
Platform
win10v2004-20240221-en
Max time kernel
148s
Max time network
153s
Command Line
Signatures
Darkcomet
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe" | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1414748551-1520717498-2956787782-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1414748551-1520717498-2956787782-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" | C:\Windows\SysWOW64\notepad.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1660 set thread context of 4528 | N/A | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | C:\Windows\SysWOW64\explorer.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\explorer.exe |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe
"C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe"
C:\Windows\SysWOW64\notepad.exe
notepad
C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4528 -ip 4528
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 252
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 185.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.71.91.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 202.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 210.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.173.189.20.in-addr.arpa | udp |
Files
memory/1660-1-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/1660-2-0x00000000005C0000-0x00000000005C4000-memory.dmp
memory/1660-3-0x0000000002180000-0x00000000021B9000-memory.dmp
memory/1660-4-0x00000000023D0000-0x00000000023E0000-memory.dmp
memory/1660-0-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/1660-5-0x0000000002570000-0x0000000002580000-memory.dmp
memory/1660-6-0x0000000077062000-0x0000000077063000-memory.dmp
memory/1660-8-0x0000000077063000-0x0000000077064000-memory.dmp
memory/1660-7-0x0000000075C00000-0x0000000075CF0000-memory.dmp
memory/1660-9-0x0000000077053000-0x0000000077054000-memory.dmp
memory/1660-10-0x00000000021E0000-0x00000000021F0000-memory.dmp
memory/1660-11-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/1660-12-0x00000000023C0000-0x00000000023C1000-memory.dmp
memory/2244-13-0x0000000000940000-0x0000000000941000-memory.dmp
C:\Windupdt\winupdate.exe
| MD5 | a2a9aa7d747dc872400ced400f162bfa |
| SHA1 | c7c900a9b5341975beef45d15acaf24d93e0e42d |
| SHA256 | f5f0bd9714c7b145305035b817957668e9ac5f1aac855ae82a638011e6860488 |
| SHA512 | 8ee2ed9b131091fb6ab2103117fbc69f7337dd2d1bf7db2c0dd30d12ac637a4302b1c86350232259a9a81fd3601f222b75731759a69528e0cf3d60383678c053 |
memory/4528-18-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/1660-20-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/1660-22-0x0000000002180000-0x00000000021B9000-memory.dmp
memory/4528-21-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/1660-25-0x0000000075C00000-0x0000000075CF0000-memory.dmp
memory/4528-27-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/4528-24-0x0000000013140000-0x00000000132BC000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-24 20:19
Reported
2024-02-24 20:22
Platform
win7-20240221-en
Max time kernel
120s
Max time network
125s
Command Line
Signatures
Darkcomet
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe" | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" | C:\Windows\SysWOW64\notepad.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2180 set thread context of 2572 | N/A | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | C:\Windows\SysWOW64\explorer.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\explorer.exe |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier | C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\DllHost.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe
"C:\Users\Admin\AppData\Local\Temp\a2a9aa7d747dc872400ced400f162bfa.exe"
C:\Windows\SysWOW64\notepad.exe
notepad
C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2572 -s 92
Network
Files
memory/2180-3-0x0000000000290000-0x00000000002C9000-memory.dmp
memory/2180-2-0x00000000001B0000-0x00000000001B4000-memory.dmp
memory/2180-1-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2180-4-0x0000000076F60000-0x0000000076F61000-memory.dmp
memory/2180-5-0x0000000076F5F000-0x0000000076F60000-memory.dmp
memory/2180-7-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
memory/2180-6-0x0000000001FD0000-0x0000000001FE0000-memory.dmp
memory/2180-10-0x0000000076F98000-0x0000000076F99000-memory.dmp
memory/2180-9-0x0000000076F61000-0x0000000076F62000-memory.dmp
memory/2180-8-0x0000000076760000-0x0000000076870000-memory.dmp
memory/2180-11-0x0000000000530000-0x0000000000540000-memory.dmp
memory/2180-12-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2180-13-0x0000000000570000-0x0000000000571000-memory.dmp
memory/2392-15-0x0000000000080000-0x0000000000081000-memory.dmp
memory/2392-41-0x0000000001BF0000-0x0000000001BF1000-memory.dmp
memory/2180-45-0x00000000027D0000-0x00000000027D2000-memory.dmp
memory/2900-46-0x00000000001E0000-0x00000000001E2000-memory.dmp
memory/2900-47-0x00000000007B0000-0x00000000007B1000-memory.dmp
memory/2572-48-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2572-50-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2572-52-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2572-54-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2572-55-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2180-56-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2180-58-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2180-60-0x0000000000290000-0x00000000002C9000-memory.dmp
memory/2572-61-0x0000000013140000-0x00000000132BC000-memory.dmp
memory/2180-57-0x0000000076760000-0x0000000076870000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\HYDRANGEAS.JPG
| MD5 | b8a5444c4c6265114d28c257acf8fedc |
| SHA1 | c0c62d4b07a9e6123438a1f3b8f71dfb698fae0c |
| SHA256 | 2c0d316e5a9cf5ed7b80750330e4086a89c0156871cfdf6b6c672387434ae826 |
| SHA512 | 8b90c41655ce2015c830f4c2ede060d7e8100bec9d88320c726663989f2df3d43ce22dc2958674c530f65c57505992b1be7e356937a17c6f2f32859b12358cde |
memory/2900-63-0x00000000007B0000-0x00000000007B1000-memory.dmp