Analysis Overview
SHA256
2e77a1b324229a10ce5ac15a916526eff4a1e44c291bb918d6ed5329bc56f81b
Threat Level: Known bad
The file 8c36f8a010e9781bda4076852efb05a7.bin was found to be: Known bad.
Malicious Activity Summary
Oski family
Oski
Downloads MZ/PE file
Checks computer location settings
Deletes itself
Reads user/profile data of web browsers
Loads dropped DLL
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Kills process with taskkill
Checks processor information in registry
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-01-15 03:16
Signatures
Oski family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-15 03:16
Reported
2024-01-15 03:18
Platform
win7-20231129-en
Max time kernel
117s
Max time network
118s
Command Line
Signatures
Oski
Downloads MZ/PE file
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2152 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2152 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2152 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2152 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2456 wrote to memory of 1192 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2456 wrote to memory of 1192 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2456 wrote to memory of 1192 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2456 wrote to memory of 1192 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe
"C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 2152 & erase C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe & RD /S /Q C:\\ProgramData\\914504463196537\\* & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 2152
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 9entrevera.sa.com | udp |
| AU | 103.83.194.50:80 | 9entrevera.sa.com | tcp |
Files
\ProgramData\sqlite3.dll
| MD5 | e477a96c8f2b18d6b5c27bde49c990bf |
| SHA1 | e980c9bf41330d1e5bd04556db4646a0210f7409 |
| SHA256 | 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660 |
| SHA512 | 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c |
\ProgramData\nss3.dll
| MD5 | bfac4e3c5908856ba17d41edcd455a51 |
| SHA1 | 8eec7e888767aa9e4cca8ff246eb2aacb9170428 |
| SHA256 | e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78 |
| SHA512 | 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66 |
\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-15 03:16
Reported
2024-01-15 03:19
Platform
win10v2004-20231215-en
Max time kernel
140s
Max time network
150s
Command Line
Signatures
Oski
Downloads MZ/PE file
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4472 wrote to memory of 5024 | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4472 wrote to memory of 5024 | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4472 wrote to memory of 5024 | N/A | C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 5024 wrote to memory of 4808 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 5024 wrote to memory of 4808 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 5024 wrote to memory of 4808 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe
"C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 4472 & erase C:\Users\Admin\AppData\Local\Temp\8c36f8a010e9781bda4076852efb05a7.exe & RD /S /Q C:\\ProgramData\\299150433454671\\* & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 4472
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 9entrevera.sa.com | udp |
| AU | 103.83.194.50:80 | 9entrevera.sa.com | tcp |
| US | 8.8.8.8:53 | 50.194.83.103.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 59.128.231.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.181.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 208.194.73.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.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 | 31.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 27.178.89.13.in-addr.arpa | udp |
Files
C:\ProgramData\sqlite3.dll
| MD5 | 56536e761fe021ac0b6560a8d8a57253 |
| SHA1 | 90c3cc54689748acb788edef585eb45cededd7f7 |
| SHA256 | 41ab95b318860348637bff7978af12851d000cabecf801144278bbbba6352e48 |
| SHA512 | 3c78a83fb81e67bab3d4a5172299282043b724d18eb429066157200304dbe7904c83d9155fc333f68fb162087db4027877cc6b2ce90574db9e88d1a5aef921d4 |
C:\ProgramData\nss3.dll
| MD5 | bfac4e3c5908856ba17d41edcd455a51 |
| SHA1 | 8eec7e888767aa9e4cca8ff246eb2aacb9170428 |
| SHA256 | e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78 |
| SHA512 | 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66 |
C:\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |