Report - calc.txt

AgentTesla AsyncRAT backdoor PWS .NET framework email stealer browser info stealer Google Chrome User Data DNS Socket KeyLogger ScreenShot AntiDebug AntiVM .NET EXE PE File PE32
ScreenShot
Created 2021.05.03 16:56 Machine s1_win7_x6402
Filename calc.txt
Type PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
AI Score
4
Behavior Score
11.0
ZERO API file : clean
VT API (file) 16 detected (malicious, high confidence, Attribute, HighConfidence, Kryptik, AARZ, MalwareX, Static AI, Malicious PE, Wacatac, ZemsilF, Nm0@a8CNLpd, MachineLearning, Anomalous, AANB, confidence)
md5 59e1199f32a8f13b0efbdd092b02b165
sha256 9133c16f469cf207152a1a8b2d8f0c59533d2f632b17828973c6a6a37b31fa97
ssdeep 12288:qD9VXrz9M0mo86HiBADJuSxRvi1W8rLZ2xYhdUezVfyo8jys:qX7zx2VIez5yLj
imphash f34d5f2d4577ed6d9ceec516c1f5a744
impfuzzy 3:rGsLdAIEK:tf
  Network IP location

Signature (23cnts)

Level Description
danger Executed a process and injected code into it
watch A process attempted to delay the analysis task.
watch Allocates execute permission to another process indicative of possible code injection
watch Attempts to remove evidence of file being downloaded from the Internet
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 File has been identified by 16 AntiVirus engines on VirusTotal as malicious
watch Looks for the Windows Idle Time to determine the uptime
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 Allocates read-write-execute memory (usually to unpack itself)
notice Changes read-write memory protection to read-execute (probably to avoid detection when setting all RWX flags at the same time)
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 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 Yara rule detected in process memory
info Checks amount of memory in system
info Checks if process is being debugged by a debugger
info One or more processes crashed
info Queries for the computername

Rules (21cnts)

Level Name Description Collection
warning infoStealer_browser_Zero browser info stealer memory
warning infoStealer_emailClients_Zero email clients info stealer memory
watch Chrome_User_Data_Check_Zero Google Chrome User Data Check memory
watch Win32_Trojan_PWS_Net_1_Zero Win32 Trojan PWS .NET Azorult binaries (upload)
notice KeyLogger Run a KeyLogger memory
notice Network_DNS Communications use DNS memory
notice Network_TCP_Socket Communications over RAW Socket memory
notice ScreenShot Take ScreenShot memory
info anti_dbg Checks if being debugged memory
info DebuggerCheck__GlobalFlags (no description) memory
info DebuggerCheck__QueryInfo (no description) memory
info DebuggerHiding__Active (no description) memory
info DebuggerHiding__Thread (no description) memory
info disable_dep Bypass DEP memory
info Is_DotNET_EXE (no description) binaries (upload)
info IsPE32 (no description) binaries (upload)
info PE_Header_Zero PE File Signature binaries (upload)
info SEH__vectored (no description) memory
info ThreadControl__Context (no description) memory
info Win_Backdoor_AsyncRAT_Zero Win Backdoor AsyncRAT binaries (upload)
info Win_Trojan_agentTesla_Zero Win.Trojan.agentTesla memory

Network (4cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?
https://www.bing.com/ US MICROSOFT-CORP-MSN-AS-BLOCK 204.79.197.200 clean
www.google.com US GOOGLE 172.217.31.132 clean
216.58.220.196 US GOOGLE 216.58.220.196 clean
79.134.225.52 CH Fink Telecom Services 79.134.225.52 mailcious

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