Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10_x64 -
resource
win10-en-20210920 -
submitted
26-09-2021 20:16
Static task
static1
Behavioral task
behavioral1
Sample
Fasapos.exe
Resource
win7v20210408
General
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Target
Fasapos.exe
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Size
3.8MB
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MD5
06520d039dc1372fec03e88669785ae0
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SHA1
0afaf454daa59ab4d5af84f20d46b6ede83df3aa
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SHA256
513c36f4a21c7ebf125fe36b98fb2c065898b9f543a6e8dbbf3f9a041c5b86fa
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SHA512
6aeb2a52e99e0cab49b0c395bf2b4d8453e43543d7700e644b09713023a6e73a32ec74bae425e835c550b480db783a0f80e793edfeb8c76774e510294854db9f
Malware Config
Extracted
sality
http://89.119.67.154/testo5/
http://kukutrustnet777.info/home.gif
http://kukutrustnet888.info/home.gif
http://kukutrustnet987.info/home.gif
http://www.klkjwre9fqwieluoi.info/
http://kukutrustnet777888.info/
Signatures
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Modifies firewall policy service 2 TTPs 3 IoCs
Processes:
Fasapos.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1" Fasapos.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" Fasapos.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" Fasapos.exe -
Disables RegEdit via registry modification
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Disables Task Manager via registry modification
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Processes:
resource yara_rule behavioral2/memory/2352-115-0x00000000022D0000-0x000000000335E000-memory.dmp upx -
Processes:
Fasapos.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" Fasapos.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" Fasapos.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" Fasapos.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UacDisableNotify = "1" Fasapos.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\Svc Fasapos.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" Fasapos.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" Fasapos.exe -
Processes:
Fasapos.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" Fasapos.exe -
Enumerates connected drives 3 TTPs 2 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
Fasapos.exedescription ioc process File opened (read-only) \??\E: Fasapos.exe File opened (read-only) \??\F: Fasapos.exe -
Drops file in Windows directory 1 IoCs
Processes:
Fasapos.exedescription ioc process File opened for modification C:\Windows\SYSTEM.INI Fasapos.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Fasapos.exepid process 2352 Fasapos.exe 2352 Fasapos.exe -
Suspicious use of AdjustPrivilegeToken 58 IoCs
Processes:
Fasapos.exedescription pid process Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe Token: SeDebugPrivilege 2352 Fasapos.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
Fasapos.exedescription pid process target process PID 2352 wrote to memory of 712 2352 Fasapos.exe fontdrvhost.exe PID 2352 wrote to memory of 716 2352 Fasapos.exe fontdrvhost.exe PID 2352 wrote to memory of 976 2352 Fasapos.exe dwm.exe PID 2352 wrote to memory of 2376 2352 Fasapos.exe sihost.exe PID 2352 wrote to memory of 2388 2352 Fasapos.exe svchost.exe PID 2352 wrote to memory of 2648 2352 Fasapos.exe taskhostw.exe PID 2352 wrote to memory of 3008 2352 Fasapos.exe Explorer.EXE PID 2352 wrote to memory of 3204 2352 Fasapos.exe ShellExperienceHost.exe PID 2352 wrote to memory of 3216 2352 Fasapos.exe SearchUI.exe PID 2352 wrote to memory of 3448 2352 Fasapos.exe RuntimeBroker.exe PID 2352 wrote to memory of 3692 2352 Fasapos.exe DllHost.exe -
System policy modification 1 TTPs 1 IoCs
Processes:
Fasapos.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" Fasapos.exe
Processes
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C:\Windows\system32\fontdrvhost.exe"fontdrvhost.exe"1⤵
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C:\Windows\system32\fontdrvhost.exe"fontdrvhost.exe"1⤵
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C:\Windows\system32\dwm.exe"dwm.exe"1⤵
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c:\windows\system32\sihost.exesihost.exe1⤵
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c:\windows\system32\svchost.exec:\windows\system32\svchost.exe -k unistacksvcgroup -s CDPUserSvc1⤵
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c:\windows\system32\taskhostw.exetaskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}1⤵
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
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C:\Users\Admin\AppData\Local\Temp\Fasapos.exe"C:\Users\Admin\AppData\Local\Temp\Fasapos.exe"2⤵
- Modifies firewall policy service
- Windows security modification
- Checks whether UAC is enabled
- Enumerates connected drives
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca1⤵
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C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe"C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca1⤵
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵
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C:\Windows\system32\DllHost.exeC:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}1⤵