Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
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submitted
21-05-2024 21:29
General
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Target
2024-05-21_e8e237ca494fd2df641294d2aa97bf13_bkransomware.exe
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Size
520KB
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MD5
e8e237ca494fd2df641294d2aa97bf13
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SHA1
576f823f508a5a43ee1a2790fa726132ac79193f
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SHA256
32c5a8a0d977a7a299e5d8e591f7938806023741a1ebd0f239f387fbe4607afd
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SHA512
c8d3eda2e7e61fadf4d8c23c882e53bda25434587bb1bd030b18bc647b664ecfe9d3aa1978085a2a6f3e1986786bf1d27989e8d3e8933944f490251750c8714f
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SSDEEP
6144:EoyZmTAsfJFakxaLjcMkc0Cax1PBGp6bYA0w601+dNT9/0626ASkVOAFL5BiLESC:EoyIJsMPrPEp6bYboEdNE/iLESb+
Score
10/10
Malware Config
Extracted
Family
sality
C2
http://89.119.67.154/testo5/
http://kukutrustnet777.info/home.gif
http://kukutrustnet888.info/home.gif
http://kukutrustnet987.info/home.gif
Signatures
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Modifies firewall policy service 2 TTPs 3 IoCs
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Sality
Sality is backdoor written in C++, first discovered in 2003.
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UAC bypass 3 TTPs 1 IoCs
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Windows security bypass 2 TTPs 6 IoCs
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Detects executables packed with Sality Polymorphic Code Generator or Simple Poly Engine or Sality 12 IoCs
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UPX dump on OEP (original entry point) 13 IoCs
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UPX packed file 12 IoCs
Detects executables packed with UPX/modified UPX open source packer.
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Windows security modification 2 TTPs 7 IoCs
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Checks whether UAC is enabled 1 TTPs 1 IoCs
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Drops file in Windows directory 2 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
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Suspicious use of AdjustPrivilegeToken 64 IoCs
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Suspicious use of SetWindowsHookEx 3 IoCs
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Suspicious use of WriteProcessMemory 17 IoCs
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System policy modification 1 TTPs 1 IoCs
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\2024-05-21_e8e237ca494fd2df641294d2aa97bf13_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-21_e8e237ca494fd2df641294d2aa97bf13_bkransomware.exe"2⤵
- Modifies firewall policy service
- UAC bypass
- Windows security bypass
- Windows security modification
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc1⤵
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C:\Windows\system32\DllHost.exeC:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}1⤵
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C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca1⤵
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵
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C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe" -ServerName:InputApp.AppX9jnwykgrccxc8by3hsrsh07r423xzvav.mca1⤵
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C:\Windows\system32\backgroundTaskHost.exe"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca1⤵
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C:\Windows\system32\backgroundTaskHost.exe"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca1⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Privilege Escalation
Create or Modify System Process
1Windows Service
1Abuse Elevation Control Mechanism
1Bypass User Account Control
1Replay Monitor
Loading Replay Monitor...
Downloads
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memory/2816-0-0x0000000000400000-0x0000000000487000-memory.dmpFilesize
540KB
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memory/2816-1-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-3-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-6-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-18-0x0000000000B30000-0x0000000000B32000-memory.dmpFilesize
8KB
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memory/2816-7-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-17-0x0000000000B30000-0x0000000000B32000-memory.dmpFilesize
8KB
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memory/2816-5-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-4-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-10-0x0000000000B40000-0x0000000000B41000-memory.dmpFilesize
4KB
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memory/2816-9-0x0000000000B30000-0x0000000000B32000-memory.dmpFilesize
8KB
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memory/2816-8-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-16-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-21-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-20-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-25-0x0000000000B30000-0x0000000000B32000-memory.dmpFilesize
8KB
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memory/2816-34-0x0000000000400000-0x0000000000487000-memory.dmpFilesize
540KB
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memory/2816-22-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB
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memory/2816-19-0x0000000002440000-0x00000000034FA000-memory.dmpFilesize
16.7MB