Analysis
- max time kernel
149s - max time network
98s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
03/05/2026, 19:25
General
- Target $R0/Uninstall Blockyfish.exe
- Size 268KB
- Sample260503-x451daf141
- SHA256 f7e0e41648179787aaaee1dad3367d9b913f1f114ae8fd70c8568e3efa2c6477
Malware Config
Signatures
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 13 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Using powershell.exe command.
- Hide Artifacts: Ignore Process Interrupts 1 TTPs 1 IoCs
Command interpreters often include specific commands/flags that ignore errors and other hangups.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 24 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall Blockyfish.exe"C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall Blockyfish.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe"C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe" _?=C:\Users\Admin\AppData\Local\Temp\$R0\2⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" -C "if (Get-Command Get-CimInstance -ErrorAction SilentlyContinue) { exit 0 } else { exit 1 }"3⤵
- Hide Artifacts: Ignore Process Interrupts
- System Location Discovery: System Language Discovery
- 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" -C "if ((Get-ExecutionPolicy -Scope Process) -eq 'Restricted') { exit 1 } else { exit 0 }"3⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- 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" -C "if ((Get-CimInstance -ClassName Win32_Process | ? {$_.Path -and $_.Path.StartsWith('C:\Users\Admin\AppData\Local\Programs\Blockyfish', 'CurrentCultureIgnoreCase')}).Count -gt 0) { exit 0 } else { exit 1 }"3⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
powershell.exe.log
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
__PSScriptPolicyTest_t5vbisb1.yr5.ps1
StdUtils.dll
System.dll
UAC.dll
WinShell.dll
modern-wizard.bmp
nsDialogs.dll
nsExec.dll
Un_A.exe
memory/1352-144-0x0000000000960000-0x0000000000F13000-memory.dmp
memory/1352-27-0x0000000000960000-0x0000000000F13000-memory.dmp
memory/3100-4-0x0000000000A80000-0x0000000001033000-memory.dmp
memory/3964-117-0x0000000005F10000-0x00000000064C3000-memory.dmp
memory/3964-106-0x00000000702E0000-0x000000007032C000-memory.dmp
memory/3964-97-0x00000000066E0000-0x0000000006A34000-memory.dmp
memory/3964-115-0x0000000070A60000-0x0000000070DB4000-memory.dmp
memory/4048-93-0x0000000005410000-0x00000000059C3000-memory.dmp
memory/4048-91-0x0000000007860000-0x0000000007871000-memory.dmp
memory/4048-90-0x00000000078F0000-0x0000000007986000-memory.dmp
memory/4048-82-0x00000000702E0000-0x000000007032C000-memory.dmp
memory/4048-80-0x0000000005D40000-0x0000000006094000-memory.dmp
memory/4736-35-0x0000000005560000-0x0000000005B88000-memory.dmp
memory/4736-62-0x0000000007C30000-0x0000000007C3A000-memory.dmp
memory/4736-63-0x0000000007DB0000-0x0000000007DDA000-memory.dmp
memory/4736-64-0x0000000007DE0000-0x0000000007E04000-memory.dmp
memory/4736-65-0x0000000070450000-0x00000000707A4000-memory.dmp
memory/4736-68-0x0000000005B90000-0x0000000006143000-memory.dmp
memory/4736-61-0x0000000007BC0000-0x0000000007BDA000-memory.dmp
memory/4736-60-0x0000000008210000-0x000000000888A000-memory.dmp
memory/4736-59-0x0000000007A80000-0x0000000007B23000-memory.dmp
memory/4736-58-0x0000000006E60000-0x0000000006E7E000-memory.dmp
memory/4736-50-0x00000000702E0000-0x000000007032C000-memory.dmp
memory/4736-49-0x0000000007A40000-0x0000000007A72000-memory.dmp
memory/4736-48-0x00000000068C0000-0x000000000690C000-memory.dmp
memory/4736-47-0x0000000006880000-0x000000000689E000-memory.dmp
memory/4736-46-0x00000000063A0000-0x00000000066F4000-memory.dmp
memory/4736-38-0x0000000006230000-0x0000000006296000-memory.dmp
memory/4736-37-0x00000000061C0000-0x0000000006226000-memory.dmp
memory/4736-36-0x0000000005320000-0x0000000005342000-memory.dmp
memory/4736-34-0x0000000002F00000-0x0000000002F10000-memory.dmp
memory/4736-33-0x0000000002CD0000-0x0000000002D06000-memory.dmp
memory/4736-32-0x0000000002F00000-0x0000000002F10000-memory.dmp