Analysis
- max time kernel
155s - max time network
160s - platform
windows10-2004_x64 - resource
win10v2004-20220310-en - submitted
18/03/2022, 18:42
General
- Target TyaOsvKpvOsSG1h.exe
- Size 2.0MB
- Sample220318-xccjradcf4
- SHA256 cda31da68a99454a628cfe74166a851d1de0af7088ab531bf03ebf684d46e0c8
Malware Config
Extracted
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bitrat
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1.38
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oka.nerdpol.ovh:2223
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communication_password
b6c6e855edf908ec7c12ce8c8e628a5c
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tor_process
tor
Signatures
- BitRAT
BitRAT is a remote access tool written in C++ and uses leaked source code from other families.
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- Looks for VMWare Tools registry key 2 TTPs
- UPX packed file 5 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
- Suspicious use of SetThreadContext 1 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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Modifies data under HKEY_USERS 1 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 19 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\TyaOsvKpvOsSG1h.exe"C:\Users\Admin\AppData\Local\Temp\TyaOsvKpvOsSG1h.exe"1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- 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 /TN "Updates\GUwCoBTl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp671F.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\TyaOsvKpvOsSG1h.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\TyaOsvKpvOsSG1h.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\TyaOsvKpvOsSG1h.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\TyaOsvKpvOsSG1h.exe"{path}"2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p -s BITS1⤵
- Modifies data under HKEY_USERS
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3180-150-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/3180-151-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/3180-149-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/3180-148-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/3180-147-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/3808-140-0x0000000005A90000-0x0000000005A9A000-memory.dmp
memory/3808-137-0x00000000060F0000-0x0000000006694000-memory.dmp
memory/3808-135-0x0000000000E50000-0x0000000001052000-memory.dmp
memory/3808-136-0x00000000059F0000-0x0000000005A8C000-memory.dmp
memory/3808-141-0x0000000005BE0000-0x0000000005C36000-memory.dmp
memory/3808-145-0x000000000BDF0000-0x000000000BE56000-memory.dmp
memory/3808-134-0x0000000074D90000-0x0000000075540000-memory.dmp
memory/3808-139-0x0000000005B40000-0x00000000060E4000-memory.dmp
memory/3808-138-0x0000000005B40000-0x0000000005BD2000-memory.dmp
memory/4132-144-0x00000200734B0000-0x00000200734B4000-memory.dmp
memory/4132-143-0x00000200710C0000-0x00000200710D0000-memory.dmp
memory/4132-142-0x0000020070E90000-0x0000020070EA0000-memory.dmp
memory/4132-152-0x0000020073760000-0x0000020073764000-memory.dmp
memory/4132-153-0x0000020073740000-0x0000020073741000-memory.dmp
memory/4132-154-0x00000200734E0000-0x00000200734E4000-memory.dmp
memory/4132-155-0x00000200734D0000-0x00000200734D1000-memory.dmp
memory/4132-156-0x00000200734D0000-0x00000200734D4000-memory.dmp
memory/4132-157-0x00000200711D0000-0x00000200711D1000-memory.dmp