Report - kyj.exe

PWS .NET framework RAT Generic Malware UPX Antivirus SMTP PWS[m] KeyLogger AntiDebug AntiVM OS Processor Check .NET EXE PE32 PE File
ScreenShot
Created 2023.03.12 11:06 Machine s1_win7_x6401
Filename kyj.exe
Type PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
AI Score
4
Behavior Score
16.2
ZERO API file : malware
VT API (file) 36 detected (DownLoader45, GenericKD, GenericRXVO, Kryptik, Vppj, malicious, confidence, 100%, GenKryptik, Eldorado, moderate confidence, GHGN, SnakeLogger, RATX, Artemis, Casdet, Detected, rexp, MSILHeracles, ai score=86, R002H0DCA23, MSIL@AI, MSIL2, LKUH04LFs8FpsjzfiN99Ig, Krypt, susgen)
md5 1be680a39218aa5f77c4bfe3c24a8107
sha256 4e67418ff70c2ce08a1a5aeb51eff88c987ea416ee626bf00b08b6377f941973
ssdeep 6144:n4qeAfo6IQVHfZpkgV6SXb5DpYksBRkQayWGtvsHNNwBfIJpLFOu:4eeEBpxsSXbaB9aXGtvsHNNQfIJphOu
imphash f34d5f2d4577ed6d9ceec516c1f5a744
impfuzzy 3:rGsLdAIEK:tf
  Network IP location

Signature (34cnts)

Level Description
danger Executed a process and injected code into it
danger File has been identified by 36 AntiVirus engines on VirusTotal as malicious
watch A process attempted to delay the analysis task.
watch Allocates execute permission to another process indicative of possible code injection
watch Attempts to identify installed AV products by installation directory
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 Harvests credentials from local email clients
watch Harvests credentials from local FTP client softwares
watch Harvests information related to installed instant messenger clients
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 The process powershell.exe wrote an executable file to disk
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 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 Connects to a Dynamic DNS Domain
notice Creates a shortcut to an executable file
notice Creates a suspicious process
notice HTTP traffic contains suspicious features which may be indicative of malware related traffic
notice Looks up the external IP address
notice One or more potentially interesting buffers were extracted
notice Performs some HTTP requests
notice Steals private information from local Internet browsers
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
info This executable has a PDB path
info Uses Windows APIs to generate a cryptographic key

Rules (21cnts)

Level Name Description Collection
warning Generic_Malware_Zero Generic Malware binaries (download)
watch Antivirus Contains references to security software binaries (download)
watch UPX_Zero UPX packed file binaries (upload)
watch Win32_Trojan_PWS_Net_1_Zero Win32 Trojan PWS .NET Azorult binaries (upload)
notice Generic_PWS_Memory_Zero PWS Memory memory
notice KeyLogger Run a KeyLogger memory
notice Network_SMTP_dotNet Communications smtp 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 OS_Processor_Check_Zero OS Processor Check 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_hook Affect hook table memory
info Win_Backdoor_AsyncRAT_Zero Win Backdoor AsyncRAT binaries (upload)

Network (5cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?
http://107.172.4.169/09/Iksgu.bmp US AS-COLOCROSSING 107.172.4.169 mailcious
http://checkip.dyndns.org/ US ORACLE-BMC-31898 193.122.6.168 clean
checkip.dyndns.org US ORACLE-BMC-31898 193.122.6.168 clean
193.122.130.0 US ORACLE-BMC-31898 193.122.130.0 clean
107.172.4.169 US AS-COLOCROSSING 107.172.4.169 malware

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