Analysis
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max time kernel
118s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
27-04-2024 23:49
Behavioral task
behavioral1
Sample
F.U.N.rar
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
F.U.N.rar
Resource
win10v2004-20240426-en
Behavioral task
behavioral3
Sample
F.U.N/READ ME!.txt
Resource
win7-20240221-en
Behavioral task
behavioral4
Sample
F.U.N/READ ME!.txt
Resource
win10v2004-20240419-en
Behavioral task
behavioral5
Sample
F.U.N/cheeto.exe
Resource
win7-20240220-en
Behavioral task
behavioral6
Sample
F.U.N/cheeto.exe
Resource
win10v2004-20240419-en
Behavioral task
behavioral7
Sample
F.U.N/loader.exe
Resource
win7-20240221-en
General
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Target
F.U.N/cheeto.exe
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Size
4.0MB
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MD5
a845ed96ffe13bcb8cdeb3d7d8acb272
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SHA1
381f00cc8aeff1e4a84812ce8f0b574f3fc9b158
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SHA256
3412caf95e6244db7c27bcc863f3e696b6a97d903b78065428cc4805381446d7
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SHA512
c568a2788c843de6b91ed9f0df1f14ef5a1817871cab12267c8cbab722464783f4731b3cea17e7b89fd5695101f9e89ed0bd0f7e028b9c09f17a2d2a8d418c29
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SSDEEP
98304:k6t+F5JfI1y+uGFMMU5U5jBJyXRy8ebQN2Knr69USNpBsEF:k6t+BA6GS5U5dMXibO2KumSbBsa
Malware Config
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ cheeto.exe -
Sets service image path in registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\frAQBc8Wsa1xVPfv\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\frAQBc8Wsa1xVPfv" cheeto.exe -
Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion cheeto.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion cheeto.exe -
resource yara_rule behavioral5/memory/2932-0-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-2-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-3-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-4-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-5-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-6-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-8-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-7-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-24-0x000000013FE10000-0x000000014087B000-memory.dmp themida behavioral5/memory/2932-25-0x000000013FE10000-0x000000014087B000-memory.dmp themida -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA cheeto.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 2932 cheeto.exe -
description ioc Process Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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 cheeto.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436 cheeto.exe -
Suspicious behavior: LoadsDriver 1 IoCs
pid Process 2932 cheeto.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeLoadDriverPrivilege 2932 cheeto.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 2932 wrote to memory of 2536 2932 cheeto.exe 28 PID 2932 wrote to memory of 2536 2932 cheeto.exe 28 PID 2932 wrote to memory of 2536 2932 cheeto.exe 28 PID 2536 wrote to memory of 2456 2536 cmd.exe 30 PID 2536 wrote to memory of 2456 2536 cmd.exe 30 PID 2536 wrote to memory of 2456 2536 cmd.exe 30 PID 2536 wrote to memory of 2696 2536 cmd.exe 31 PID 2536 wrote to memory of 2696 2536 cmd.exe 31 PID 2536 wrote to memory of 2696 2536 cmd.exe 31 PID 2536 wrote to memory of 2600 2536 cmd.exe 32 PID 2536 wrote to memory of 2600 2536 cmd.exe 32 PID 2536 wrote to memory of 2600 2536 cmd.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\F.U.N\cheeto.exe"C:\Users\Admin\AppData\Local\Temp\F.U.N\cheeto.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Sets service image path in registry
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies system certificate store
- Suspicious behavior: LoadsDriver
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\F.U.N\cheeto.exe" MD5 | find /i /v "md5" | find /i /v "certutil"2⤵
- Suspicious use of WriteProcessMemory
PID:2536 -
C:\Windows\system32\certutil.execertutil -hashfile "C:\Users\Admin\AppData\Local\Temp\F.U.N\cheeto.exe" MD53⤵PID:2456
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C:\Windows\system32\find.exefind /i /v "md5"3⤵PID:2696
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C:\Windows\system32\find.exefind /i /v "certutil"3⤵PID:2600
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Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Modify Registry
2Subvert Trust Controls
1Install Root Certificate
1Virtualization/Sandbox Evasion
1