Analysis
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max time kernel
120s -
max time network
120s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
17/01/2022, 09:39
Static task
static1
Behavioral task
behavioral1
Sample
3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe
Resource
win7-en-20211208
General
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Target
3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe
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Size
2.5MB
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MD5
71af238fbf3c5a3a2c2c3594f1ba8a32
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SHA1
b9f49782704b14572985ca13b10842d3aa836ad0
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SHA256
3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8
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SHA512
fb12811297a22a71ead742dcde54357cf712c04ad690ed6103287f903592999fcde804357488e062fb8783a24394cc0ff23fa1ffbb9d15941e38873a75f59d7f
Malware Config
Extracted
cryptbot
kotehj62.top
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payload_url
http://okadoc09.top/download.php?file=makeyr.exe
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
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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 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe -
Deletes itself 1 IoCs
pid Process 724 cmd.exe -
resource yara_rule behavioral1/memory/748-55-0x0000000000380000-0x0000000000A12000-memory.dmp themida behavioral1/memory/748-56-0x0000000000380000-0x0000000000A12000-memory.dmp themida behavioral1/memory/748-57-0x0000000000380000-0x0000000000A12000-memory.dmp themida behavioral1/memory/748-58-0x0000000000380000-0x0000000000A12000-memory.dmp themida -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 748 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 1344 timeout.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 748 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 748 wrote to memory of 724 748 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe 27 PID 748 wrote to memory of 724 748 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe 27 PID 748 wrote to memory of 724 748 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe 27 PID 748 wrote to memory of 724 748 3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe 27 PID 724 wrote to memory of 1344 724 cmd.exe 29 PID 724 wrote to memory of 1344 724 cmd.exe 29 PID 724 wrote to memory of 1344 724 cmd.exe 29 PID 724 wrote to memory of 1344 724 cmd.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe"C:\Users\Admin\AppData\Local\Temp\3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe"1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:748 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\VdenQkXAOJBC & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3c320ddeb57b9d6240cbaab26104e906dfa04a10115a773355a2157013e991a8.exe"2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:724 -
C:\Windows\SysWOW64\timeout.exetimeout 43⤵
- Delays execution with timeout.exe
PID:1344
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