Analysis
- max time kernel
150s - max time network
166s - platform
windows10_x64 - resource
win10v20210410 - submitted
13/08/2021, 18:04
General
- Target 5DE9DCC57B578BF915E553AE272269DC.exe
- Size 684KB
- Sample210813-kdgt45f84j
- SHA256 5b14d9674cbd536403423c9822182497469034a86ad12ced50ab02bdc9166cce
Malware Config
Extracted
-
blacknet
-
v3.7.0 Public
-
D7tJ7v
-
http://officialcomerce1.xyz/lee
-
BN[f9a1b17a]
-
antivm
false
-
elevate_uac
false
-
install_name
WindowsUpdate.exe
-
splitter
|BN|
-
start_name
e162b1333458a713bc6916cc8ac4110c
-
startup
false
-
usb_spread
false
Signatures
- BlackNET
BlackNET is an open source remote access tool written in VB.NET.
- BlackNET Payload 5 IoCs
- Contains code to disable Windows Defender 5 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
- suricata: ET MALWARE Win32/BlackNET CnC Keep-Alive
suricata: ET MALWARE Win32/BlackNET CnC Keep-Alive
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- 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.
- Suspicious behavior: EnumeratesProcesses 14 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\5DE9DCC57B578BF915E553AE272269DC.exe"C:\Users\Admin\AppData\Local\Temp\5DE9DCC57B578BF915E553AE272269DC.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TiqvqaWbL" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEC1B.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2256-123-0x0000000006EE0000-0x0000000006F04000-memory.dmp
memory/2256-116-0x00000000058E0000-0x00000000058E1000-memory.dmp
memory/2256-118-0x00000000053E0000-0x00000000058DE000-memory.dmp
memory/2256-119-0x0000000005410000-0x0000000005411000-memory.dmp
memory/2256-120-0x000000000B200000-0x000000000B202000-memory.dmp
memory/2256-121-0x000000000B2B0000-0x000000000B2B1000-memory.dmp
memory/2256-122-0x0000000006F70000-0x0000000006FE1000-memory.dmp
memory/2256-114-0x0000000000B10000-0x0000000000B11000-memory.dmp
memory/2256-117-0x0000000005480000-0x0000000005481000-memory.dmp
memory/2256-124-0x0000000007140000-0x0000000007141000-memory.dmp
memory/3656-127-0x0000000000400000-0x000000000041E000-memory.dmp
memory/3656-135-0x0000000005830000-0x0000000005831000-memory.dmp
memory/3656-136-0x00000000055F0000-0x0000000005AEE000-memory.dmp
memory/3656-139-0x00000000055F0000-0x0000000005AEE000-memory.dmp
memory/3656-138-0x00000000055F0000-0x0000000005AEE000-memory.dmp
memory/3656-140-0x00000000055F0000-0x0000000005AEE000-memory.dmp