Analysis
- max time kernel
62s - max time network
110s - platform
windows10_x64 - resource
win10 - submitted
13/10/2020, 12:41
General
- Target YKjeKrJd4FXnXs8.exe
- Size 937KB
- Sample201013-2e46864h8x
- SHA256 70caf501b061da2729d33d4b0c5e9b9c58bc554cdbdddef16f7e057ea346808c
Malware Config
Signatures
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- MassLogger Main Payload 2 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Deletes itself 1 IoCs
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of SetThreadContext 1 IoCs
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\YKjeKrJd4FXnXs8.exe"C:\Users\Admin\AppData\Local\Temp\YKjeKrJd4FXnXs8.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uBLcTOj" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA7DE.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\YKjeKrJd4FXnXs8.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\YKjeKrJd4FXnXs8.exe'3⤵
- Deletes itself
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1504-27-0x00000000072A0000-0x00000000072A1000-memory.dmp
memory/1504-31-0x00000000084D0000-0x00000000084D1000-memory.dmp
memory/1504-36-0x0000000006E40000-0x0000000006E41000-memory.dmp
memory/1504-35-0x0000000009390000-0x0000000009391000-memory.dmp
memory/1504-34-0x0000000008FB0000-0x0000000008FB1000-memory.dmp
memory/1504-33-0x0000000009A10000-0x0000000009A11000-memory.dmp
memory/1504-25-0x0000000007330000-0x0000000007331000-memory.dmp
memory/1504-24-0x0000000004790000-0x0000000004791000-memory.dmp
memory/1504-26-0x0000000007200000-0x0000000007201000-memory.dmp
memory/1504-23-0x0000000073540000-0x0000000073C2E000-memory.dmp
memory/1504-29-0x0000000007C20000-0x0000000007C21000-memory.dmp
memory/1504-30-0x0000000007A40000-0x0000000007A41000-memory.dmp
memory/1504-32-0x0000000008280000-0x0000000008281000-memory.dmp
memory/2764-13-0x0000000000400000-0x0000000000486000-memory.dmp
memory/2764-16-0x00000000734C0000-0x0000000073BAE000-memory.dmp
memory/3788-10-0x000000000D490000-0x000000000D491000-memory.dmp
memory/3788-0-0x00000000734C0000-0x0000000073BAE000-memory.dmp
memory/3788-7-0x00000000074F0000-0x00000000074F4000-memory.dmp
memory/3788-4-0x0000000005220000-0x0000000005221000-memory.dmp
memory/3788-3-0x0000000005850000-0x0000000005851000-memory.dmp
memory/3788-1-0x00000000008F0000-0x00000000008F1000-memory.dmp
memory/3788-9-0x000000000A050000-0x000000000A11C000-memory.dmp
memory/3788-8-0x0000000007880000-0x0000000007940000-memory.dmp
memory/3788-6-0x00000000075A0000-0x00000000075A1000-memory.dmp
memory/3788-5-0x00000000052D0000-0x00000000052D1000-memory.dmp