Analysis
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max time kernel
204s -
max time network
205s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 12:35
General
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Target
Bolbi.vbs
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Size
46KB
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MD5
99ec3237394257cb0b5c24affe458f48
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SHA1
5300e68423da9712280e601b51622c4b567a23a4
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SHA256
ec17f950f6ee9c0c237d93bc0b766aa6e2ab458c70320b534212043128177b51
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SHA512
af2394d18f672def6d5d7081def759093759205aac0390ca03591c58c15a02e463a68b583b6fc28ef1368922b4bd5f9072d570ee97a955250a478cdb093500cb
Score
10/10
Malware Config
Signatures
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UAC bypass 3 TTPs
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Blocklisted process makes network request 5 IoCs
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Disables cmd.exe use via registry modification
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Modifies Installed Components in the registry 2 TTPs
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Possible privilege escalation attempt 4 IoCs
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Sets file execution options in registry 2 TTPs
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
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Modifies file permissions 1 TTPs 4 IoCs
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Adds Run key to start application 2 TTPs 4 IoCs
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Checks whether UAC is enabled 1 TTPs 1 IoCs
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Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
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Sets desktop wallpaper using registry 2 TTPs 1 IoCs
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Drops file in Windows directory 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks SCSI registry key(s) 3 TTPs 28 IoCs
SCSI information is often read in order to detect sandboxing environments.
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Enumerates system info in registry 2 TTPs 2 IoCs
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Kills process with taskkill 1 IoCs
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Modifies Control Panel 4 IoCs
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Modifies registry class 56 IoCs
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Suspicious use of AdjustPrivilegeToken 64 IoCs
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Suspicious use of FindShellTrayWindow 49 IoCs
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Suspicious use of SendNotifyMessage 24 IoCs
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Suspicious use of SetWindowsHookEx 4 IoCs
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Suspicious use of WriteProcessMemory 22 IoCs
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System policy modification 1 TTPs 31 IoCs
Processes
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Bolbi.vbs"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\wscript.exe"C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Local\Temp\Bolbi.vbs" /elevated2⤵
- Blocklisted process makes network request
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Sets desktop wallpaper using registry
- Drops file in Windows directory
- Modifies Control Panel
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c C:\Users\Public\Ghostroot\KillDora.bat3⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\rundll32.exeC:\Windows\System32\RUNDLL32.EXE user32.dll, UpdatePerUserSystemParameters4⤵
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C:\Windows\system32\reg.exereg delete "HKLM\System\CurrentControlSet\Control\SafeBoot\Minimal" /f4⤵
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C:\Windows\system32\reg.exereg delete "HKLM\System\CurrentControlSet\Control\SafeBoot\Network" /f4⤵
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C:\Windows\system32\taskkill.exetaskkill /f /im explorer.exe4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\explorer.exeexplorer.exe4⤵
- Enumerates connected drives
- Checks SCSI registry key(s)
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\takeown.exetakeown /f C:\Windows\System32\4⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\icacls.exeicacls C:\Windows\System32 /Grant Users:F4⤵
- Possible privilege escalation attempt
- Modifies file permissions
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C:\Windows\system32\takeown.exetakeown /f C:\Windows\4⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\icacls.exeicacls C:\Windows\ /Grant Users:F4⤵
- Possible privilege escalation attempt
- Modifies file permissions
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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⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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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⤵
- Enumerates system info in registry
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -p -s camsvc1⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\USERS\ADMIN\DESKTOP\BOLBI.TXTFilesize
29B
MD5b37ed35ef479e43f406429bc36e68ec4
SHA15e3ec88d9d13d136af28dea0d3c2529f5b6e3b82
SHA256cc2b26f9e750e05cd680ef5721d9269fe4c8d23cabf500a2ff9065b6b4f7e08c
SHA512d1c1ea6292d8113ce8f02a9ad3921e2d8632f036bdfa243bd6600a173ac0b1fc659f91b43c8d9ec0beaabb87d9654f5f231e98fde27e4d9bdfd5862ca5cb13b7
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C:\Users\Public\Ghostroot\KillDora.batFilesize
482B
MD54f08159f1d70d41bf975e23230033a0f
SHA1ea88d6fbdcf218e0e04a650d947250d8a3dfad40
SHA256d6e7530e3879225bc21fc17859e5b5c71414375baac27bb361fd9162f4b49e0e
SHA512958ac467e54d35c4ca5459853d661e49ea81efaa1ce3044114d577fcb757343a40ddb30b9f540cf9c100f05958a843bf312fa879c43bda7513643c824b318d6a
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memory/212-135-0x0000000000000000-mapping.dmp
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memory/2204-137-0x0000000000000000-mapping.dmp
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memory/2204-142-0x0000000003870000-0x0000000003880000-memory.dmpFilesize
64KB
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memory/2204-141-0x0000000003860000-0x0000000003870000-memory.dmpFilesize
64KB
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memory/2368-244-0x0000016CC6F5C000-0x0000016CC6F60000-memory.dmpFilesize
16KB
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memory/2368-245-0x0000016CC6F5C000-0x0000016CC6F60000-memory.dmpFilesize
16KB
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memory/2368-255-0x0000016CC6E60000-0x0000016CC6E80000-memory.dmpFilesize
128KB
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memory/2368-248-0x0000016CC6F5C000-0x0000016CC6F60000-memory.dmpFilesize
16KB
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memory/2368-247-0x0000016CC6F5C000-0x0000016CC6F60000-memory.dmpFilesize
16KB
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memory/2368-246-0x0000016CC6F5C000-0x0000016CC6F60000-memory.dmpFilesize
16KB
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memory/2368-159-0x0000016CC2F10000-0x0000016CC2F18000-memory.dmpFilesize
32KB
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memory/2368-155-0x0000016CC6780000-0x0000016CC67A0000-memory.dmpFilesize
128KB
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memory/2368-153-0x0000016CC3F10000-0x0000016CC3F30000-memory.dmpFilesize
128KB
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memory/2484-131-0x0000000000000000-mapping.dmp
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memory/3536-151-0x0000000000000000-mapping.dmp
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memory/3676-139-0x0000000000000000-mapping.dmp
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memory/3848-136-0x0000000000000000-mapping.dmp
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memory/4460-133-0x0000000000000000-mapping.dmp
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memory/4496-150-0x0000000000000000-mapping.dmp
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memory/4800-134-0x0000000000000000-mapping.dmp
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memory/4808-130-0x0000000000000000-mapping.dmp
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memory/5116-138-0x0000000000000000-mapping.dmp