Analysis
- max time kernel
149s - max time network
113s - platform
windows10_x64 - resource
win10v20210410 - submitted
04/07/2021, 09:48
General
- Target fc975bc299012aed22a11c489274bca8.exe
- Size 1.0MB
- Sample210704-ka63k2rf62
- SHA256 0e987602142e521bab7a311b02a5856d89a07f41c74a3bbb2b8a2ecddcaa9655
Malware Config
Signatures
- Blocklisted process makes network request 2 IoCs
- Loads dropped DLL 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Program Files directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 26 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies system certificate store 2 TTPs 2 IoCs
- Suspicious behavior: EnumeratesProcesses 16 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 24 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\fc975bc299012aed22a11c489274bca8.exe"C:\Users\Admin\AppData\Local\Temp\fc975bc299012aed22a11c489274bca8.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\FC975B~1.TMP,S C:\Users\Admin\AppData\Local\Temp\FC975B~1.EXE2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\system32\rundll32.exe C:\PROGRA~3\BKLNGF~1\KGJOCB~1.TMP,OQsuUmE= C:\Users\Admin\AppData\Local\Temp\FC975B~1.TMP3⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\rundll32.exeC:\Windows\system32\rundll32.exe C:\Windows\system32\shell32.dll,#61 318014⤵
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Executionpolicy bypass -File "C:\Users\Admin\AppData\Local\Temp\tmp734.tmp.ps1"4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Executionpolicy bypass -File "C:\Users\Admin\AppData\Local\Temp\tmp4BC1.tmp.ps1"4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\nslookup.exe"C:\Windows\system32\nslookup.exe" -type=any localhost5⤵
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C:\Windows\SysWOW64\schtasks.exeschtasks /End /tn \Microsoft\Windows\Wininet\CacheTask4⤵
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C:\Windows\SysWOW64\schtasks.exeschtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask4⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1240-146-0x0000000007030000-0x0000000007031000-memory.dmp
memory/1240-156-0x0000000008660000-0x0000000008661000-memory.dmp
memory/1240-139-0x00000000073A0000-0x00000000073A1000-memory.dmp
memory/1240-140-0x0000000006D60000-0x0000000006D61000-memory.dmp
memory/1240-141-0x0000000006D62000-0x0000000006D63000-memory.dmp
memory/1240-142-0x0000000007300000-0x0000000007301000-memory.dmp
memory/1240-143-0x0000000007AC0000-0x0000000007AC1000-memory.dmp
memory/1240-144-0x0000000007D10000-0x0000000007D11000-memory.dmp
memory/1240-145-0x0000000007D80000-0x0000000007D81000-memory.dmp
memory/1240-160-0x0000000006D63000-0x0000000006D64000-memory.dmp
memory/1240-147-0x0000000008390000-0x0000000008391000-memory.dmp
memory/1240-148-0x00000000084D0000-0x00000000084D1000-memory.dmp
memory/1240-150-0x0000000008570000-0x0000000008571000-memory.dmp
memory/1240-155-0x0000000009C70000-0x0000000009C71000-memory.dmp
memory/1240-138-0x0000000006CE0000-0x0000000006CE1000-memory.dmp
memory/1240-157-0x00000000091C0000-0x00000000091C1000-memory.dmp
memory/2024-132-0x00000000063B0000-0x00000000063B1000-memory.dmp
memory/3596-172-0x0000000007DE0000-0x0000000007DE1000-memory.dmp
memory/3596-168-0x0000000006C22000-0x0000000006C23000-memory.dmp
memory/3596-175-0x00000000081B0000-0x00000000081B1000-memory.dmp
memory/3596-167-0x0000000006C20000-0x0000000006C21000-memory.dmp
memory/3596-187-0x0000000006C23000-0x0000000006C24000-memory.dmp
memory/3904-134-0x000002F0633D0000-0x000002F063581000-memory.dmp
memory/3904-133-0x0000000000010000-0x00000000001B0000-memory.dmp
memory/3968-118-0x0000000000400000-0x00000000006B1000-memory.dmp
memory/3968-114-0x0000000000D70000-0x0000000000E5E000-memory.dmp