Analysis Overview
SHA256
790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32
Threat Level: Known bad
The file 790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32 was found to be: Known bad.
Malicious Activity Summary
Orcus family
Orcus main payload
Orcus
Orcurs Rat Executable
Orcurs Rat Executable
Loads dropped DLL
Checks computer location settings
Executes dropped EXE
Suspicious use of SetThreadContext
Enumerates physical storage devices
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-12-14 01:02
Signatures
Orcurs Rat Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Orcus family
Orcus main payload
| 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
2024-12-14 01:02
Reported
2024-12-14 01:05
Platform
win7-20241010-en
Max time kernel
128s
Max time network
129s
Command Line
Signatures
Orcus
Orcus family
Orcus main payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Orcurs Rat Executable
| 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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2844 set thread context of 2628 | N/A | C:\ProgramData\$77RegAsm.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe |
| PID 1128 set thread context of 600 | N/A | C:\ProgramData\$77RegAsm.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe
"C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe"
C:\ProgramData\$77RegAsm.exe
"C:\ProgramData\$77RegAsm.exe"
C:\Windows\system32\taskeng.exe
taskeng.exe {A1601603-D253-49C2-AEE1-839271F79074} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 38135.client.sudorat.top | udp |
| RU | 185.37.62.158:38135 | 38135.client.sudorat.top | tcp |
| N/A | 127.0.0.1:1111 | tcp |
Files
memory/2716-0-0x0000000074E8E000-0x0000000074E8F000-memory.dmp
memory/2716-1-0x00000000011F0000-0x00000000014EE000-memory.dmp
memory/2716-2-0x0000000000570000-0x000000000057E000-memory.dmp
memory/2716-3-0x0000000074E80000-0x000000007556E000-memory.dmp
memory/2716-4-0x00000000010C0000-0x000000000111C000-memory.dmp
memory/2716-5-0x0000000000600000-0x0000000000612000-memory.dmp
\ProgramData\$77RegAsm.exe
| MD5 | a5c760e458503463ed3902bdbf605e4e |
| SHA1 | 2fb83c914783070267e42dbad89fd2c7afc9d9af |
| SHA256 | 790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32 |
| SHA512 | 5b905facc4db2afb1dec0460b965c705c2566d91e2db7a95bc23cbd7dc8cbdb9414d4b4a6306e7a57d5ff4eb658910f12497608d5442cc5d8c740dc5be446b5b |
memory/2844-17-0x0000000000C20000-0x0000000000F1E000-memory.dmp
memory/2844-18-0x0000000074E80000-0x000000007556E000-memory.dmp
memory/2716-16-0x0000000074E80000-0x000000007556E000-memory.dmp
C:\ProgramData\$77RegAsm.exe.config
| MD5 | a2b76cea3a59fa9af5ea21ff68139c98 |
| SHA1 | 35d76475e6a54c168f536e30206578babff58274 |
| SHA256 | f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839 |
| SHA512 | b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad |
memory/2844-19-0x00000000005D0000-0x00000000005E2000-memory.dmp
memory/2844-20-0x0000000002400000-0x000000000244E000-memory.dmp
memory/2628-22-0x0000000000400000-0x00000000006FE000-memory.dmp
memory/2844-34-0x0000000074E80000-0x000000007556E000-memory.dmp
memory/2628-32-0x0000000000400000-0x00000000006FE000-memory.dmp
memory/2628-31-0x0000000000400000-0x00000000006FE000-memory.dmp
memory/2628-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2628-28-0x0000000000400000-0x00000000006FE000-memory.dmp
memory/2628-26-0x0000000000400000-0x00000000006FE000-memory.dmp
memory/2628-24-0x0000000000400000-0x00000000006FE000-memory.dmp
memory/2628-33-0x0000000000400000-0x00000000006FE000-memory.dmp
memory/600-43-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2628-47-0x0000000000DA0000-0x0000000000DB8000-memory.dmp
memory/2628-48-0x0000000002270000-0x0000000002280000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Cab5B0D.tmp
| MD5 | 49aebf8cbd62d92ac215b2923fb1b9f5 |
| SHA1 | 1723be06719828dda65ad804298d0431f6aff976 |
| SHA256 | b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f |
| SHA512 | bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b |
memory/2628-65-0x0000000004580000-0x000000000458E000-memory.dmp
memory/2628-66-0x0000000004C30000-0x0000000004C32000-memory.dmp
memory/908-69-0x0000000000210000-0x000000000050E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-12-14 01:02
Reported
2024-12-14 01:05
Platform
win10v2004-20241007-en
Max time kernel
150s
Max time network
151s
Command Line
Signatures
Orcus
Orcus family
Orcus main payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Orcurs Rat Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4692 set thread context of 1300 | N/A | C:\ProgramData\$77RegAsm.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\ProgramData\$77RegAsm.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProgramData\$77RegAsm.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe
"C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe"
C:\ProgramData\$77RegAsm.exe
"C:\ProgramData\$77RegAsm.exe"
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 38135.client.sudorat.top | udp |
| RU | 185.37.62.158:38135 | 38135.client.sudorat.top | tcp |
| US | 8.8.8.8:53 | 71.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 158.62.37.185.in-addr.arpa | udp |
| N/A | 127.0.0.1:1111 | tcp | |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.163.202.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.49.80.91.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 63.141.182.52.in-addr.arpa | udp |
Files
memory/1920-0-0x000000007541E000-0x000000007541F000-memory.dmp
memory/1920-1-0x0000000000980000-0x0000000000C7E000-memory.dmp
memory/1920-2-0x0000000002E20000-0x0000000002E2E000-memory.dmp
memory/1920-3-0x0000000075410000-0x0000000075BC0000-memory.dmp
memory/1920-4-0x0000000005770000-0x00000000057CC000-memory.dmp
memory/1920-6-0x00000000058C0000-0x0000000005952000-memory.dmp
memory/1920-5-0x0000000005E70000-0x0000000006414000-memory.dmp
memory/1920-7-0x0000000005750000-0x0000000005762000-memory.dmp
C:\ProgramData\$77RegAsm.exe
| MD5 | a5c760e458503463ed3902bdbf605e4e |
| SHA1 | 2fb83c914783070267e42dbad89fd2c7afc9d9af |
| SHA256 | 790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32 |
| SHA512 | 5b905facc4db2afb1dec0460b965c705c2566d91e2db7a95bc23cbd7dc8cbdb9414d4b4a6306e7a57d5ff4eb658910f12497608d5442cc5d8c740dc5be446b5b |
C:\ProgramData\$77RegAsm.exe.config
| MD5 | a2b76cea3a59fa9af5ea21ff68139c98 |
| SHA1 | 35d76475e6a54c168f536e30206578babff58274 |
| SHA256 | f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839 |
| SHA512 | b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad |
memory/1920-22-0x0000000075410000-0x0000000075BC0000-memory.dmp
memory/4692-24-0x0000000075410000-0x0000000075BC0000-memory.dmp
memory/4692-25-0x0000000075410000-0x0000000075BC0000-memory.dmp
memory/4692-26-0x0000000005BB0000-0x0000000005BFE000-memory.dmp
memory/4692-28-0x00000000064F0000-0x000000000658C000-memory.dmp
memory/1136-29-0x0000000075410000-0x0000000075BC0000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\$77RegAsm.exe.log
| MD5 | 663b8d5469caa4489d463aa9bc18124f |
| SHA1 | e57123a7d969115853ea631a3b33826335025d28 |
| SHA256 | 7b4fa505452f0b8ac74bb31f5a03b13342836318018fb18d224ae2ff11b1a7e8 |
| SHA512 | 45e373295125a629fcc0b19609608d969c9106514918bfac5d6b8e340e407434577b825741b8fa6a043c8f3f5c1a030ba8857da5f4e8ef15a551ce3c5fe03b55 |
memory/4692-33-0x0000000075410000-0x0000000075BC0000-memory.dmp
memory/1300-34-0x0000000005DD0000-0x0000000005DE8000-memory.dmp
memory/1300-35-0x0000000005E00000-0x0000000005E10000-memory.dmp
memory/1300-36-0x0000000006A90000-0x0000000006A9A000-memory.dmp
memory/1300-39-0x0000000007330000-0x0000000007396000-memory.dmp
memory/1300-40-0x00000000079C0000-0x0000000007FD8000-memory.dmp
memory/1300-41-0x0000000007440000-0x0000000007452000-memory.dmp
memory/1300-42-0x00000000074A0000-0x00000000074DC000-memory.dmp
memory/1136-43-0x0000000075410000-0x0000000075BC0000-memory.dmp
memory/1300-44-0x00000000074E0000-0x000000000752C000-memory.dmp
memory/1300-45-0x0000000007670000-0x000000000777A000-memory.dmp
memory/1300-46-0x0000000007FE0000-0x00000000081A2000-memory.dmp
memory/1300-47-0x0000000007620000-0x000000000762E000-memory.dmp
memory/1300-48-0x0000000008200000-0x0000000008250000-memory.dmp