Analysis Overview
SHA256
156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673
Threat Level: Known bad
The file 156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.sample was found to be: Known bad.
Malicious Activity Summary
DarkSide
Drops file in System32 directory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies data under HKEY_USERS
Modifies registry class
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2022-02-01 16:13
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-02-01 16:13
Reported
2022-02-01 16:16
Platform
win10-en-20211208
Max time kernel
89s
Max time network
97s
Command Line
Signatures
DarkSide
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\counters2.dat | C:\Windows\SysWOW64\rundll32.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\SessionHash = 69adfe26f512e6db08fd673723162e6bcf4fba8ad495ee66fa78b2d7124932d8 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFilesHash = 48f62b81a1ab5f7f23c82d53be008ee626f98fdff8729d564376171baf61e39d | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Control Panel\International | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key deleted | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFiles0000 = 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 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFilesHash = 36451d210411dd0e1c0e3e637fc52203aaa56b801411b1df17217a13d9e128c6 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFiles0000 = 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 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFiles0000 = 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 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\SessionHash = 201c33f12083697bdb75e7540199d650699c984a2e85a4cf6af3580525ae1c4e | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFilesHash = 71c433da2da10e809fa7d78e513f24150bc7454892f8c352cc36997e52a9a337 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\Owner = 8c02000045658d5de219d801 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\SessionHash = 6aa8a601c96cc161514c35e62440bc443fdecac238c5e223c6222537327f88a5 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\Sequence = "1" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFiles0000 = 5c005c003f005c0043003a005c0044006f00630075006d0065006e0074007300200061006e0064002000530065007400740069006e00670073005c00410064006d0069006e005c004c006f00630061006c002000530065007400740069006e00670073005c005000610063006b0061006700650073005c004d006900630072006f0073006f00660074002e00570069006e0064006f00770073002e0043006f007200740061006e0061005f006300770035006e003100680032007400780079006500770079005c00530065007400740069006e00670073005c00730065007400740069006e00670073002e0064006100740000000000 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\SessionHash = e6955815d4dff4351626b4449a4bf73522fc17c09cc58d44114f4aca04472398 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\RestartManager\Session0000\RegFilesHash = bf67297b086ab9befd6117032f2a985a85da33212742d466e4c2dfa02d22da1e | C:\Windows\SysWOW64\rundll32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\.a97d73e3 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\.a97d73e3\ = "a97d73e3" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\a97d73e3\DefaultIcon | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\a97d73e3 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\a97d73e3\DefaultIcon\ = "C:\\ProgramData\\a97d73e3.ico" | C:\Windows\SysWOW64\rundll32.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 |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#3 worker0 job0-3376
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | baroquetees.com | udp |