Analysis
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max time kernel
4265058s -
max time network
131s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
16-01-2022 09:04
Static task
static1
Behavioral task
behavioral1
Sample
71af238fbf3c5a3a2c2c3594f1ba8a32.exe
Resource
win7-en-20211208
General
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Target
71af238fbf3c5a3a2c2c3594f1ba8a32.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.
Processes:
71af238fbf3c5a3a2c2c3594f1ba8a32.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion 71af238fbf3c5a3a2c2c3594f1ba8a32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion 71af238fbf3c5a3a2c2c3594f1ba8a32.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
71af238fbf3c5a3a2c2c3594f1ba8a32.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation 71af238fbf3c5a3a2c2c3594f1ba8a32.exe -
Processes:
resource yara_rule behavioral2/memory/1572-130-0x0000000000F00000-0x0000000001592000-memory.dmp themida behavioral2/memory/1572-131-0x0000000000F00000-0x0000000001592000-memory.dmp themida behavioral2/memory/1572-132-0x0000000000F00000-0x0000000001592000-memory.dmp themida behavioral2/memory/1572-133-0x0000000000F00000-0x0000000001592000-memory.dmp themida -
Processes:
71af238fbf3c5a3a2c2c3594f1ba8a32.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 71af238fbf3c5a3a2c2c3594f1ba8a32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
71af238fbf3c5a3a2c2c3594f1ba8a32.exepid process 1572 71af238fbf3c5a3a2c2c3594f1ba8a32.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 4 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
71af238fbf3c5a3a2c2c3594f1ba8a32.exeMusNotification.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 71af238fbf3c5a3a2c2c3594f1ba8a32.exe Key opened \Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0 MusNotification.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz MusNotification.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 71af238fbf3c5a3a2c2c3594f1ba8a32.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 2008 timeout.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
71af238fbf3c5a3a2c2c3594f1ba8a32.exepid process 1572 71af238fbf3c5a3a2c2c3594f1ba8a32.exe 1572 71af238fbf3c5a3a2c2c3594f1ba8a32.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
MusNotification.exedescription pid process Token: SeShutdownPrivilege 3968 MusNotification.exe Token: SeCreatePagefilePrivilege 3968 MusNotification.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
71af238fbf3c5a3a2c2c3594f1ba8a32.execmd.exedescription pid process target process PID 1572 wrote to memory of 524 1572 71af238fbf3c5a3a2c2c3594f1ba8a32.exe cmd.exe PID 1572 wrote to memory of 524 1572 71af238fbf3c5a3a2c2c3594f1ba8a32.exe cmd.exe PID 1572 wrote to memory of 524 1572 71af238fbf3c5a3a2c2c3594f1ba8a32.exe cmd.exe PID 524 wrote to memory of 2008 524 cmd.exe timeout.exe PID 524 wrote to memory of 2008 524 cmd.exe timeout.exe PID 524 wrote to memory of 2008 524 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\71af238fbf3c5a3a2c2c3594f1ba8a32.exe"C:\Users\Admin\AppData\Local\Temp\71af238fbf3c5a3a2c2c3594f1ba8a32.exe"1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\ZedaPwoX & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\71af238fbf3c5a3a2c2c3594f1ba8a32.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 43⤵
- Delays execution with timeout.exe
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C:\Windows\system32\MusNotification.exeC:\Windows\system32\MusNotification.exe1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/524-134-0x0000000000000000-mapping.dmp
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memory/1572-130-0x0000000000F00000-0x0000000001592000-memory.dmpFilesize
6.6MB
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memory/1572-131-0x0000000000F00000-0x0000000001592000-memory.dmpFilesize
6.6MB
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memory/1572-132-0x0000000000F00000-0x0000000001592000-memory.dmpFilesize
6.6MB
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memory/1572-133-0x0000000000F00000-0x0000000001592000-memory.dmpFilesize
6.6MB
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memory/2008-135-0x0000000000000000-mapping.dmp