Analysis Overview
SHA256
c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c
Threat Level: Known bad
The file c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c was found to be: Known bad.
Malicious Activity Summary
Orcus main payload
Orcus
Orcurs Rat Executable
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Drops file in Program Files directory
Enumerates physical storage devices
Unsigned PE
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-26 01:01
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-26 01:01
Reported
2023-12-26 01:04
Platform
win7-20231215-en
Max time kernel
149s
Max time network
147s
Command Line
Signatures
Orcus
Orcus main payload
| 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 |
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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
| N/A | N/A | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\scvbost.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\scvbost.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
| N/A | N/A | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\scvbost.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Software\Microsoft\Windows\CurrentVersion\Run\servinhost = "\"C:\\Program Files (x86)\\Winrer\\winrer.exe\"" | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Winrer\winrer.exe | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
| File opened for modification | C:\Program Files (x86)\Winrer\winrer.exe | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
| File created | C:\Program Files (x86)\Winrer\winrer.exe.config | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\scvbost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\scvbost.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Winrer\winrer.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe
"C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe"
C:\Users\Admin\AppData\Local\Temp\0.DLL
C:\Users\Admin\AppData\Local\Temp\0.DLL
C:\Windows\system32\taskeng.exe
taskeng.exe {985C96A6-94E5-46E3-9F64-50424A2EE967} S-1-5-21-3601492379-692465709-652514833-1000:CALKHSYM\Admin:Interactive:[1]
C:\Users\Admin\AppData\Roaming\scvbost.exe
"C:\Users\Admin\AppData\Roaming\scvbost.exe" /launchSelfAndExit "C:\Program Files (x86)\Winrer\winrer.exe" 2776 /protectFile
C:\Users\Admin\AppData\Roaming\scvbost.exe
"C:\Users\Admin\AppData\Roaming\scvbost.exe" /watchProcess "C:\Program Files (x86)\Winrer\winrer.exe" 2776 "/protectFile"
C:\Program Files (x86)\Winrer\winrer.exe
"C:\Program Files (x86)\Winrer\winrer.exe"
C:\Program Files (x86)\Winrer\winrer.exe
"C:\Program Files (x86)\Winrer\winrer.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp |
Files
C:\Users\Admin\AppData\Local\Temp\0.DLL
| MD5 | 8c53fea9d3e481ecfeb2ff929a50af80 |
| SHA1 | b52bbd27265d92266ad5979acf137d57e0e67736 |
| SHA256 | 8d3e41f8fb8322e16240f7b812fe709de37183b7df3a251729ea8f6793907809 |
| SHA512 | 3d71a7c542ca3d84112d173251e743ccc984da684dbc5443f61ae981af1af352a32d7c4c2030a712f90bda9fa1452a0081e62122f2aff1f586b5a6b168ca9180 |
\Users\Admin\AppData\Local\Temp\0.DLL
| MD5 | 9d9b556132f563e05bc825d48c34f7ea |
| SHA1 | 853d1ca3fd0cc66b3b66d71815d44fc101435d49 |
| SHA256 | f493000554727083b9bb060e38b2bd9dbcc28ad82a045c6b995c26d25fe72d05 |
| SHA512 | 38b241430c19a305980cacb05d078e7b52377e7ef4c23d85a9caeb2ad655a37215fa42efbae069b05b7b0d8eb628a0726c79fb00d1cb238b46abf6760e8e8ff8 |
memory/3024-8-0x00000000002C0000-0x00000000003A8000-memory.dmp
memory/3024-9-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/3024-12-0x0000000001FA0000-0x0000000001FFC000-memory.dmp
memory/3024-11-0x00000000003C0000-0x00000000003CE000-memory.dmp
memory/3024-10-0x0000000004A00000-0x0000000004A40000-memory.dmp
C:\Program Files (x86)\Winrer\winrer.exe
| MD5 | b8bc2d6425c79c3aa89b48c195b3deb8 |
| SHA1 | 694dba90b54ed42669f7efc8d4774d084515ca6c |
| SHA256 | c14b83c0d226388478ac7d1902cdea824d6a2383b548aa695146f145ae60c7d4 |
| SHA512 | 76133d0017e57bf665194c8ae477cde1b740806564e082ed237282614c58582dafe4b3ec8a5e51ae15e9979ac7db1ad5ce1347830909cda7d9e15ace98286bf1 |
memory/3024-24-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2776-27-0x0000000004B30000-0x0000000004B70000-memory.dmp
memory/2776-28-0x00000000006B0000-0x00000000006FE000-memory.dmp
memory/2776-26-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2776-29-0x0000000000F50000-0x0000000000F68000-memory.dmp
memory/2776-30-0x0000000000FA0000-0x0000000000FB0000-memory.dmp
memory/2580-47-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2388-48-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2580-44-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2580-43-0x0000000000380000-0x0000000000388000-memory.dmp
memory/2596-40-0x0000000000F10000-0x0000000000F50000-memory.dmp
memory/2596-35-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2776-25-0x0000000000FD0000-0x00000000010B8000-memory.dmp
C:\Program Files (x86)\Winrer\winrer.exe.config
| MD5 | a2b76cea3a59fa9af5ea21ff68139c98 |
| SHA1 | 35d76475e6a54c168f536e30206578babff58274 |
| SHA256 | f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839 |
| SHA512 | b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad |
memory/3024-13-0x0000000000510000-0x0000000000522000-memory.dmp
memory/2596-49-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2776-50-0x0000000074810000-0x0000000074EFE000-memory.dmp
memory/2776-51-0x0000000004B30000-0x0000000004B70000-memory.dmp
memory/2388-52-0x0000000074810000-0x0000000074EFE000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-26 01:01
Reported
2023-12-26 01:04
Platform
win10v2004-20231215-en
Max time kernel
2s
Max time network
152s
Command Line
Signatures
Orcus
Orcus main payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| 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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Winrer\winrer.exe | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
| File opened for modification | C:\Program Files (x86)\Winrer\winrer.exe | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
| File created | C:\Program Files (x86)\Winrer\winrer.exe.config | C:\Users\Admin\AppData\Local\Temp\0.DLL | N/A |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 552 wrote to memory of 1116 | N/A | C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe | C:\Users\Admin\AppData\Local\Temp\0.DLL |
| PID 552 wrote to memory of 1116 | N/A | C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe | C:\Users\Admin\AppData\Local\Temp\0.DLL |
| PID 552 wrote to memory of 1116 | N/A | C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe | C:\Users\Admin\AppData\Local\Temp\0.DLL |
Processes
C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe
"C:\Users\Admin\AppData\Local\Temp\c7b04d4dc2618a3c72948baf64ff1eb0357862f543ac411d753ca8dcc1f2803c.exe"
C:\Users\Admin\AppData\Local\Temp\0.DLL
C:\Users\Admin\AppData\Local\Temp\0.DLL
C:\Program Files (x86)\Winrer\winrer.exe
"C:\Program Files (x86)\Winrer\winrer.exe"
C:\Users\Admin\AppData\Roaming\scvbost.exe
"C:\Users\Admin\AppData\Roaming\scvbost.exe" /watchProcess "C:\Program Files (x86)\Winrer\winrer.exe" 4052 "/protectFile"
C:\Users\Admin\AppData\Roaming\scvbost.exe
"C:\Users\Admin\AppData\Roaming\scvbost.exe" /launchSelfAndExit "C:\Program Files (x86)\Winrer\winrer.exe" 4052 /protectFile
C:\Program Files (x86)\Winrer\winrer.exe
"C:\Program Files (x86)\Winrer\winrer.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 147.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| N/A | 192.168.178.77:10134 | tcp | |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 138.91.171.81:80 | tcp | |
| US | 8.8.8.8:53 | 59.128.231.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 19.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| N/A | 192.168.178.77:10134 | tcp | |
| US | 8.8.8.8:53 | 2.136.104.51.in-addr.arpa | udp |
| N/A | 192.168.178.77:10134 | tcp | |
| US | 8.8.8.8:53 | 86.23.85.13.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 |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| US | 8.8.8.8:53 | 9.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
| N/A | 192.168.178.77:10134 | tcp | |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp | |
| N/A | 192.168.178.77:10134 | tcp |
Files
C:\Users\Admin\AppData\Local\Temp\0.DLL
| MD5 | 51734f8dad901296cb9f69696e03ba79 |
| SHA1 | cd40938bc1fe7dbf45bf28d2e262c6f9cab008e3 |
| SHA256 | 8c2697f4f72fbe44f30188a7051bd2a9702dd1e7e171b558c49ccf96e6c38b1b |
| SHA512 | 7a9754b4123ce2925c77ed30726cebe26ec4fed0943a95515029867b03a89844d1dc4fdaaa6a5124599ad62d9777828ba2134c893b7d1d4790111cfa578bbf77 |
C:\Users\Admin\AppData\Local\Temp\0.DLL
| MD5 | 7fc282f937133339137eeb233e9017ab |
| SHA1 | c1acc72c6abae94c71c25a84689f17cd97a60180 |
| SHA256 | c394c6ff513ae7858d867df824fa96d6d272edf480310c51eae8f4b90ed2b693 |
| SHA512 | 866005a9eb827b115cc555aa1fbbf5a8f86052a21343c1aae76ee8514b763661340efbd6e9b27ed9d2fff1b31d83a46a23b6ebddb6f225fdd395c461fa182dca |
memory/1116-8-0x0000000004B30000-0x0000000004B40000-memory.dmp
memory/1116-7-0x0000000074170000-0x0000000074920000-memory.dmp
memory/1116-10-0x0000000004C10000-0x0000000004C6C000-memory.dmp
memory/1116-11-0x0000000005220000-0x00000000057C4000-memory.dmp
memory/1116-12-0x0000000004D80000-0x0000000004E12000-memory.dmp
memory/1116-9-0x00000000024E0000-0x00000000024EE000-memory.dmp
memory/1116-6-0x0000000000180000-0x0000000000268000-memory.dmp
memory/1116-13-0x0000000004D60000-0x0000000004D72000-memory.dmp
memory/1116-29-0x0000000074170000-0x0000000074920000-memory.dmp
memory/4052-31-0x0000000005270000-0x0000000005280000-memory.dmp
memory/4052-30-0x0000000074170000-0x0000000074920000-memory.dmp
memory/4052-32-0x0000000005DE0000-0x0000000005E2E000-memory.dmp
memory/4052-34-0x0000000005FB0000-0x0000000005FC8000-memory.dmp
memory/1156-36-0x0000000074170000-0x0000000074920000-memory.dmp
memory/1156-38-0x0000000005A80000-0x0000000005A90000-memory.dmp
memory/4052-39-0x0000000006650000-0x000000000665A000-memory.dmp
memory/1892-53-0x0000000000810000-0x0000000000818000-memory.dmp
memory/1892-54-0x0000000074170000-0x0000000074920000-memory.dmp
memory/1892-58-0x0000000074170000-0x0000000074920000-memory.dmp
memory/1672-59-0x0000000074170000-0x0000000074920000-memory.dmp
memory/4052-37-0x0000000006150000-0x0000000006160000-memory.dmp
memory/4052-35-0x0000000006320000-0x00000000064E2000-memory.dmp
memory/1156-61-0x0000000074170000-0x0000000074920000-memory.dmp
memory/4052-62-0x0000000074170000-0x0000000074920000-memory.dmp
memory/4052-63-0x0000000005270000-0x0000000005280000-memory.dmp
memory/1672-64-0x0000000074170000-0x0000000074920000-memory.dmp