Report - calcinstall.exe

RAT Gen1 Gen2 Schwerer Generic Malware UPX Malicious Library Malicious Packer Admin Tool (Sysinternals etc ...) Anti_VM Obsidium protector .NET EXE PE32 PE File DLL OS Processor Check GIF Format MZP Format PE64 HWP MSOffice File
ScreenShot
Created 2023.04.27 09:59 Machine s1_win7_x6403
Filename calcinstall.exe
Type PE32 executable (console) Intel 80386 Mono/.Net assembly, for MS Windows
AI Score
4
Behavior Score
13.0
ZERO API file : malware
VT API (file) 34 detected (ConvertAd, MSILZilla, ABRisk, BCMB, Attribute, HighConfidence, AGen, AgentAGen, jvlzlk, Siggen20, Artemis, Generic Reputation PUA, odke, ai score=80, GrayWare, Detected, unsafe, R002H0DD323, CLOUD, PossibleThreat, MALICIOUS)
md5 881bef8377f48946c3863d06b3de735a
sha256 3147bb5595c16445b63ad43b9c5019f98bc881b2032634128aec7f97282578d7
ssdeep 384:EuAfvvbBnFoTE/TKZRthUOGs7KFKjqfvGBkSy:BAf3b1FkamRtuOn7KFKcMk3
imphash f34d5f2d4577ed6d9ceec516c1f5a744
impfuzzy 3:rGsLdAIEK:tf
  Network IP location

Signature (31cnts)

Level Description
danger File has been identified by 34 AntiVirus engines on VirusTotal as malicious
watch A process attempted to delay the analysis task.
watch Attempts to create or modify system certificates
watch Deletes executed files from disk
watch Drops 66 unknown file mime types indicative of ransomware writing encrypted files back to disk
watch Installs itself for autorun at Windows startup
watch One or more of the buffers contains an embedded PE file
notice A process created a hidden window
notice Allocates read-write-execute memory (usually to unpack itself)
notice Checks adapter addresses which can be used to detect virtual network interfaces
notice Checks for the Locally Unique Identifier on the system for a suspicious privilege
notice Checks whether any human activity is being performed by constantly checking whether the foreground window changed
notice Creates a shortcut to an executable file
notice Creates executable files on the filesystem
notice Drops a binary and executes it
notice Drops an executable to the user AppData folder
notice Executes one or more WMI queries
notice HTTP traffic contains suspicious features which may be indicative of malware related traffic
notice One or more potentially interesting buffers were extracted
notice Performs some HTTP requests
notice Queries for potentially installed applications
notice Queries the disk size which could be used to detect virtual machine with small fixed size or dynamic allocation
notice Resolves a suspicious Top Level Domain (TLD)
notice Searches running processes potentially to identify processes for sandbox evasion
notice Uses Windows utilities for basic Windows functionality
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 One or more processes crashed
info Queries for the computername
info This executable has a PDB path

Rules (23cnts)

Level Name Description Collection
danger Schwerer_IN Schwerer binaries (download)
danger Win32_Trojan_Gen_1_0904B0_Zero Win32 Trojan Emotet binaries (download)
warning Generic_Malware_Zero Generic Malware binaries (download)
watch Admin_Tool_IN_Zero Admin Tool Sysinternals binaries (download)
watch Malicious_Library_Zero Malicious_Library binaries (download)
watch Malicious_Packer_Zero Malicious Packer binaries (download)
watch Obsidium_Zero Obsidium protector file binaries (download)
watch UPX_Zero UPX packed file binaries (download)
notice anti_vm_detect Possibly employs anti-virtualization techniques binaries (download)
info HWP_file_format HWP Document File binaries (download)
info Is_DotNET_EXE (no description) binaries (upload)
info IsDLL (no description) binaries (download)
info IsPE32 (no description) binaries (download)
info IsPE32 (no description) binaries (upload)
info IsPE64 (no description) binaries (download)
info Lnk_Format_Zero LNK Format binaries (download)
info Microsoft_Office_File_Zero Microsoft Office File binaries (download)
info mzp_file_format MZP(Delphi) file format binaries (download)
info OS_Processor_Check_Zero OS Processor Check binaries (download)
info PE_Header_Zero PE File Signature binaries (download)
info PE_Header_Zero PE File Signature binaries (upload)
info Win32_Trojan_Gen_2_0904B0_Zero Win32 Trojan Gen binaries (download)
info Win_Backdoor_AsyncRAT_Zero Win Backdoor AsyncRAT binaries (upload)

Network (7cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?
http://best-calc.ru/api/1/update/? DE Hetzner Online GmbH 176.9.121.140 clean
best-calc.ru DE Hetzner Online GmbH 176.9.121.140 clean
hamstersoft-app-install.s3.eu-west-2.amazonaws.com US Amazon Data Services Ireland Ltd 52.95.142.38 malware
www.google-analytics.com US GOOGLE 142.250.207.110 clean
176.9.121.140 DE Hetzner Online GmbH 176.9.121.140 clean
3.5.244.142 Unknown 3.5.244.142 clean
172.217.27.14 US GOOGLE 172.217.27.14 clean

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