Report - nputty.exe

Generic Malware Malicious Packer PE File .NET EXE PE32
ScreenShot
Created 2021.08.27 15:54 Machine s1_win7_x6401
Filename nputty.exe
Type PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
AI Score
8
Behavior Score
9.0
ZERO API file : malware
VT API (file) 53 detected (malicious, high confidence, Nanocore, GenericKD, Orbus, Unsafe, Save, Dorpal, ali1000029, ZemsilF, mmW@aOORPEl, Eldorado, Nancrat, NanoBot, hmqoyu, CLASSIC, R + Troj, NanoCor, Noancooe, JDE@5s4u9t, Static AI, Malicious PE, Gen7, ai score=87, kcloud, fpar, Nancat, score, Dzty, confidence, 100%, susgen)
md5 1b726484bea3d11852e96ef2494cce24
sha256 206e34baddf20f48f62400f5af88662e64739953e48a1d8f4b6043a9dfa15cb3
ssdeep 3072:QzEqV6B1jHa6dtJ10jgvzcgi+oG/j9iaMP2s/HISzJ6h3dr/h0EyX1Gi62y4X7Ae:QLV6Bta6dtJmakIM5ZsdrpNyXe1+7Ae
imphash f34d5f2d4577ed6d9ceec516c1f5a744
impfuzzy 3:rGsLdAIEK:tf
  Network IP location

Signature (18cnts)

Level Description
danger File has been identified by 53 AntiVirus engines on VirusTotal as malicious
danger Connects to an IP address that is no longer responding to requests (legitimate services will remain up-and-running usually)
watch A process attempted to delay the analysis task.
watch Attempts to remove evidence of file being downloaded from the Internet
watch Installs itself for autorun at Windows startup
watch Looks for the Windows Idle Time to determine the uptime
watch One or more of the buffers contains an embedded PE file
watch Putty Files
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 Checks whether any human activity is being performed by constantly checking whether the foreground window changed
notice Connects to a Dynamic DNS Domain
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 Collects information to fingerprint the system (MachineGuid
info Queries for the computername

Rules (5cnts)

Level Name Description Collection
warning Generic_Malware_Zero Generic Malware binaries (upload)
watch Malicious_Packer_Zero Malicious Packer binaries (upload)
info Is_DotNET_EXE (no description) binaries (upload)
info IsPE32 (no description) binaries (upload)
info PE_Header_Zero PE File Signature binaries (upload)

Network (4cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?
dertrefg.duckdns.org Unknown 37.0.10.40 clean
hhjhtggfr.duckdns.org US WOW 192.169.69.26 mailcious
192.169.69.26 US WOW 192.169.69.26 phishing
37.0.10.40 Unknown 37.0.10.40 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