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Report - vbc.exe

Azorult .NET framework AsyncRAT backdoor
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ScreenShot
Created 2021.03.17 15:35 Machine s1_win7_x6402
Filename vbc.exe
Type PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
AI Score
9
 Behavior Score
10.6
ZERO API file : malware
VT API (file) 20 detected (malicious, high confidence, Unsafe, Save, ZemsilF, bn0@a043ao, Kryptik, Eldorado, Malcode, gdn30, Confuser, K suspicious, Score, AgentTesla, HeapOverride, Static AI, Malicious PE, confidence, QVM03)
md5 1a4fc3cf283fdb42c7f67f2df8364286
sha256 d707d5f6e5ce74d40a170c81dbe7b298341110a3bd22b573945fa5073504e226
ssdeep 24576:3IoglTr37pt9272we2tM7jM9xIQvy44Ouhx5b/p+/:3Iog9b7pH2iwe2takIQq4UJb/I/
imphash f34d5f2d4577ed6d9ceec516c1f5a744
impfuzzy 3:rGsLdAIEK:tf
  Network IP location

Signature (23cnts)

Level Description
danger Executed a process and injected code into it
warning File has been identified by 20 AntiVirus engines on VirusTotal as malicious
watch Allocates execute permission to another process indicative of possible code injection
watch Code injection by writing an executable or DLL to the memory of another process
watch Communicates with host for which no DNS query was performed
watch Deletes executed files from disk
watch Potential code injection by writing to the memory of another process
watch Resumed a suspended thread in a remote process potentially indicative of process injection
watch Used NtSetContextThread to modify a thread in a remote process indicative of process injection
notice A process created a hidden window
notice Allocates read-write-execute memory (usually to unpack itself)
notice Checks for the Locally Unique Identifier on the system for a suspicious privilege
notice Creates a suspicious process
notice One or more potentially interesting buffers were extracted
notice Potentially malicious URLs were found in the process memory dump
notice The binary likely contains encrypted or compressed data indicative of a packer
notice Uses Windows utilities for basic Windows functionality
notice Yara rule detected in process memory
info Checks amount of memory in system
info Checks if process is being debugged by a debugger
info Command line console output was observed
info Queries for the computername
info Uses Windows APIs to generate a cryptographic key

Rules (62cnts)

Level Name Description Collection
notice Str_Win32_Http_API Match Windows Http API call memory
notice Str_Win32_Internet_API Match Windows Inet API call memory
info anti_dbg Checks if being debugged memory
info antisb_threatExpert Anti-Sandbox checks for ThreatExpert memory
info Check_Dlls (no description) memory
info Check_Qemu_Description (no description) memory
info Check_Qemu_DeviceMap (no description) memory
info Check_VBox_Description (no description) memory
info Check_VBox_DeviceMap (no description) memory
info Check_VBox_Guest_Additions (no description) memory
info Check_VBox_VideoDrivers (no description) memory
info Check_VmTools (no description) memory
info Check_VMWare_DeviceMap (no description) memory
info DebuggerCheck__GlobalFlags (no description) memory
info DebuggerCheck__QueryInfo (no description) memory
info DebuggerCheck__RemoteAPI (no description) memory
info DebuggerException__ConsoleCtrl (no description) memory
info DebuggerException__SetConsoleCtrl (no description) memory
info DebuggerHiding__Active (no description) memory
info DebuggerHiding__Thread (no description) memory
info disable_dep Bypass DEP memory
info IsPE32 (no description) binaries (upload)
info PE_Header_Zero PE File Signature Zero binaries (upload)
info SEH__vectored (no description) memory
info ThreadControl__Context (no description) memory
info vmdetect_misc Following Rule is referenced from AlienVault's Yara rule repository.This rule contains additional processes and driver names. memory
info win_hook Affect hook table memory
info WMI_VM_Detect Detection of Virtual Appliances through the use of WMI for use of evasion. memory
info create_com_service Create a COM server memory
info create_service Create a windows service memory
info cred_local Steal credential memory
info escalate_priv Escalade priviledges memory
info hijack_network Hijack network configuration memory
info inject_thread Code injection with CreateRemoteThread in a remote process memory
info IsNET_EXE (no description) binaries (upload)
info IsPacked Entropy Check binaries (upload)
info IsWindowsGUI (no description) binaries (upload)
info keylogger Run a keylogger memory
info migrate_apc APC queue tasks migration memory
info network_dga Communication using dga memory
info network_dns Communications use DNS memory
info network_dropper File downloader/dropper memory
info network_ftp Communications over FTP memory
info network_http Communications over HTTP memory
info network_p2p_win Communications over P2P network memory
info network_smtp_dotNet Communications smtp memory
info network_tcp_listen Listen for incoming communication memory
info network_tcp_socket Communications over RAW socket memory
info network_udp_sock Communications over UDP network memory
info screenshot Take screenshot memory
info sniff_audio Record Audio memory
info spreading_file Malware can spread east-west file memory
info spreading_share Malware can spread east-west using share drive memory
info Str_Win32_Wininet_Library Match Windows Inet API library declaration memory
info Str_Win32_Winsock2_Library Match Winsock 2 API library declaration memory
info Win32_Trojan_PWS_Azorult_Net_1_Zero Win32 Trojan PWS .NET Azorult binaries (upload)
info Win_Backdoor_AsyncRAT_Zero Win Backdoor AsyncRAT binaries (upload)
info win_files_operation Affect private profile memory
info win_mutex Create or check mutex memory
info win_private_profile Affect private profile memory
info win_registry Affect system registries memory
info win_token Affect system token memory

Network (0cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?

Suricata ids

PE API

IAT(Import Address Table) Library

mscoree.dll
 0x402000 _CorExeMain

EAT(Export Address Table) is none


Similarity measure (PE file only) - Checking for service failure