Report - muk.exe

Malicious Packer Downloader UPX PE File PE32
ScreenShot
Created 2025.03.13 09:47 Machine s1_win7_x6401
Filename muk.exe
Type PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
AI Score
10
Behavior Score
3.6
ZERO API file : clean
VT API (file) 57 detected (AIDetectMalware, Remcos, Malicious, score, Ghanarava, Dump, Unsafe, Save, confidence, 100%, Attribute, HighConfidence, moderate confidence, Rescoms, RATX, kvsovm, AyOt9ijbbiR, YXFCLZ, Real Protect, high, Static AI, Malicious PE, Detected, GrayWare, Wacapew, Wacatac, ABApplication, ODWR, R625809, Artemis, BScope, GdSda)
md5 444c83a662cc3f056b30e69ef646c097
sha256 f01c012ed02d1c83885899e0f6dfa0f053a7a16548de074d859428df064d0802
ssdeep 3072:QrO63tSvNCRwz34cPY5ggG2UfMvIn6T7vxVuzebnf1hCp/AjgqI3hTBLdS7TXwIn:2H3tEIOz34cPY5gXQH7USGhlU7
imphash 3318a4310235d39fc3cad1d3c7dfd161
impfuzzy 6:omRgCHWvC365rBJAEoZ/OEGDzyRZr4/b4RUptIKVSZozAhQcY46cErxKXn:omRgYh+ABZG/Dzgr4kYSIAx7LErxMn
  Network IP location

Signature (7cnts)

Level Description
danger File has been identified by 57 AntiVirus engines on VirusTotal as malicious
watch Communicates with host for which no DNS query was performed
notice HTTP traffic contains suspicious features which may be indicative of malware related traffic
notice Performs some HTTP requests
notice The binary likely contains encrypted or compressed data indicative of a packer
notice The executable is compressed using UPX
info Checks amount of memory in system

Rules (5cnts)

Level Name Description Collection
watch Malicious_Packer_Zero Malicious Packer binaries (upload)
watch Network_Downloader File Downloader binaries (upload)
watch UPX_Zero UPX packed file 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 ?
http://geoplugin.net/json.gp NL Schuberg Philis B.V. 178.237.33.50 clean
geoplugin.net NL Schuberg Philis B.V. 178.237.33.50 clean
178.237.33.50 NL Schuberg Philis B.V. 178.237.33.50 clean
198.23.227.212 US AS-COLOCROSSING 198.23.227.212 clean

Suricata ids

PE API

IAT(Import Address Table) Library

ADVAPI32.dll
 0x488724 RegCloseKey
GDI32.dll
 0x48872c BitBlt
gdiplus.dll
 0x488734 GdipFree
KERNEL32.DLL
 0x48873c LoadLibraryA
 0x488740 ExitProcess
 0x488744 GetProcAddress
 0x488748 VirtualProtect
ole32.dll
 0x488750 CoGetObject
SHELL32.dll
 0x488758 ExtractIconA
SHLWAPI.dll
 0x488760 StrToIntA
urlmon.dll
 0x488768 URLDownloadToFileW
USER32.dll
 0x488770 DrawIcon
WININET.dll
 0x488778 InternetOpenW
WINMM.dll
 0x488780 PlaySoundW
WS2_32.dll
 0x488788 WSAGetLastError

EAT(Export Address Table) is none



Similarity measure (PE file only) - Checking for service failure