Report - update.exe

North Korea Malicious Library .NET framework(MSIL) UPX PE File .NET EXE PE32 OS Processor Check
ScreenShot
Created 2025.02.25 13:27 Machine s1_win7_x6403
Filename update.exe
Type PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
AI Score
3
Behavior Score
7.2
ZERO API file : mailcious
VT API (file) 41 detected (Jalapeno, Ghanarava, MSILZilla, Unsafe, GenKryptik, Attribute, HighConfidence, malicious, high confidence, Kryptik, ANET, Remcos, CLOUD, yttuq, YXFBXZ, high, score, Generic Reputation PUA, Static AI, Malicious PE, Detected, Wacapew, Wacatac, Eldorado, Krypt, Chgt)
md5 99711400fad366c4e65956fbe17622ec
sha256 19e896996a23e019db80cd71b0b872e1f9ac7378661c1948c15128bfc7250d1c
ssdeep 98304:41P+Jjyn60IQLmUiTR6shoVyRquOetcI3s:Y+Jje6HQLtiTRzoV0Rzt/3
imphash f34d5f2d4577ed6d9ceec516c1f5a744
impfuzzy 3:rGsLdAIEK:tf
  Network IP location

Signature (16cnts)

Level Description
danger File has been identified by 41 AntiVirus engines on VirusTotal as malicious
danger Executed a process and injected code into it
watch Installs itself for autorun at Windows startup
watch One or more of the buffers contains an embedded PE file
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 executable files on the filesystem
notice Drops a binary and executes it
notice Drops an executable to the user AppData folder
notice One or more potentially interesting buffers were extracted
notice The binary likely contains encrypted or compressed data indicative of a packer
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 Uses Windows APIs to generate a cryptographic key

Rules (15cnts)

Level Name Description Collection
danger NorthKorea_Zero Maybe it's North Korea File binaries (download)
danger NorthKorea_Zero Maybe it's North Korea File binaries (upload)
watch Malicious_Library_Zero Malicious_Library binaries (download)
watch Malicious_Library_Zero Malicious_Library binaries (upload)
watch UPX_Zero UPX packed file binaries (download)
watch UPX_Zero UPX packed file binaries (upload)
watch Win32_Trojan_PWS_Net_1_Zero Win32 Trojan PWS .NET Azorult binaries (download)
watch Win32_Trojan_PWS_Net_1_Zero Win32 Trojan PWS .NET Azorult binaries (upload)
info Is_DotNET_EXE (no description) binaries (download)
info Is_DotNET_EXE (no description) binaries (upload)
info IsPE32 (no description) binaries (download)
info IsPE32 (no description) binaries (upload)
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)

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