Analysis
- user interaction
yes - max time kernel
299s - max time network
210s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
01/04/2026, 03:04
General
- Target Temp.zip
- Size 3.4MB
- Sample260401-dkrtvsbt71
- SHA256 9b40c7785aeba3cba5a9d396ec2bbd41470ff09da15aff5f469f66b97920b777
Malware Config
Signatures
- Coffloader
Coffloader is an open-source beacon loader written in C.
- Coffloader family
- Detects Coffloader 3 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Drops file in System32 directory 1 IoCs
- System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs
Adversaries may check for Internet connectivity on compromised systems.
- Modifies registry class 1 IoCs
- Opens file in notepad (likely ransom note) 2 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
Processes
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C:\Windows\Explorer.exeC:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\Temp.zip1⤵
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Documents\Temp\sfping.txt1⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Opens file in notepad (likely ransom note)
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C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe"PowerShell.exe" -noexit -command Set-Location -literalPath 'C:\Users\Admin\Documents\Temp'1⤵
- Command and Scripting Interpreter: PowerShell
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Documents\Temp\sql.log2⤵
- Opens file in notepad (likely ransom note)
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c .\sql.log JDgiAyc8NBAeVG90cxt2bmd6HGVhYgkJA3t0ahg/JSY6QmskIBAeQyM0ahgrOCQvRCVzJEdEGS0mI1E6eSohQA==2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\Documents\Temp\sql.log.\sql.log JDgiAyc8NBAeVG90cxt2bmd6HGVhYgkJA3t0ahg/JSY6QmskIBAeQyM0ahgrOCQvRCVzJEdEGS0mI1E6eSohQA==3⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c sql.log JDgiAyc8NBAeVG90cxt2bmd6HGVhYgkJA3t0ahg/JSY6QmskIBAeQyM0ahgrOCQvRCVzJEdEGS0mI1E6eSohQA==2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\Documents\Temp\sql.logsql.log JDgiAyc8NBAeVG90cxt2bmd6HGVhYgkJA3t0ahg/JSY6QmskIBAeQyM0ahgrOCQvRCVzJEdEGS0mI1E6eSohQA==3⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\Documents\Temp\sql.exesql.exe JDgiAyc8NBAeVG90cxt2bmd6HGVhYgkJA3t0ahg/JSY6QmskIBAeQyM0ahgrOCQvRCVzJEdEGS0mI1E6eSohQA==3⤵
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
__PSScriptPolicyTest_s11tlxqf.4rb.ps1
memory/1004-28-0x000001C9AE020000-0x000001C9AE0C9000-memory.dmp
memory/3428-35-0x00000270782C0000-0x0000027078369000-memory.dmp
memory/3716-113-0x0000000000AB0000-0x000000000139C000-memory.dmp
memory/4044-48-0x0000000000AB0000-0x000000000139C000-memory.dmp
memory/4100-40-0x0000000000AB0000-0x000000000139C000-memory.dmp
memory/4816-25-0x000001EC65450000-0x000001EC6546A000-memory.dmp
memory/4816-21-0x000001EC65350000-0x000001EC65405000-memory.dmp
memory/4816-23-0x000001EC65430000-0x000001EC6544C000-memory.dmp
memory/4816-24-0x000001EC651F0000-0x000001EC651FA000-memory.dmp
memory/4816-2-0x000001EC4CCD0000-0x000001EC4CCF2000-memory.dmp
memory/4816-26-0x000001EC65410000-0x000001EC65418000-memory.dmp
memory/4816-27-0x000001EC65420000-0x000001EC65426000-memory.dmp
memory/4816-22-0x000001EC651E0000-0x000001EC651EA000-memory.dmp
memory/4816-29-0x000001EC65470000-0x000001EC6547A000-memory.dmp
memory/4816-30-0x000001EC4AC70000-0x000001EC4AD19000-memory.dmp
memory/4816-31-0x000001EC4C600000-0x000001EC4C60C000-memory.dmp
memory/4816-20-0x000001EC652B0000-0x000001EC652CC000-memory.dmp
memory/4816-12-0x000001EC65290000-0x000001EC652AE000-memory.dmp
memory/4816-11-0x000001EC652D0000-0x000001EC65346000-memory.dmp
memory/4816-10-0x000001EC65200000-0x000001EC65244000-memory.dmp