MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 66a64168ef1203b08b4dc0cde4b184c4db9023951f5ce9e12e3f93f3fde17c6d. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry

Worm.Ramnit

Vendor detections: 12

Intelligence 12 IOCs YARA 12 File information Comments

SHA256 hash:	66a64168ef1203b08b4dc0cde4b184c4db9023951f5ce9e12e3f93f3fde17c6d
SHA3-384 hash:	6e7a06cf45bd8e85161c11e56e4a17386f0a5ae3db1463ee6f8d4f919d164358e5cde7163803d9835d771b3a623f76d2
SHA1 hash:	bf24139904e25a284587281f475584cae889d2ff
MD5 hash:	8f66e21a56f2a528e13425f89c536979
humanhash:	oregon-thirteen-queen-london
File name:	Endermanch@Petya.A.exe
Download:	download sample
Signature	Worm.Ramnit Create hunting rule
File size:	247'808 bytes
First seen:	2024-07-24 22:51:37 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	1a63922d5931d1bb8ca5188313f78eaa (1 x Ransomware.Petya, 1 x Worm.Ramnit)
ssdeep	6144:MCyjXhd1mialK+qoNr8PxtZE6x5v+k6fS:4jXhd8ZlKOrMZE6x5b6f
Threatray	3 similar samples on MalwareBazaar
TLSH	T16A349D2276E0847DFAB3063748FD36759AFDF9714931890B33C50A0E79605E1A93A763
TrID	41.1% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 22.2% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 11.8% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 7.5% (.EXE) Win64 Executable (generic) (10523/12/4) 4.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
File icon (PE):
dhash icon	e9f4ae8ac0c6c664 (1 x NotPetya, 1 x GoldenEye, 1 x Petya)
Reporter	Anonymous
Tags:	exe Worm.Ramnit

Anonymous

this malware sample is very nasty!

Intelligence

File Origin

# of uploads :

# of downloads :

318

Origin country :

Vendor Threat Intelligence

Detection(s):

PUA.Win.Packer.Asprotect-3

Win.Malware.Wapomi-10020301-0

Win.Trojan.Petya-5637914-0

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=66a185a4cb3d02fa0e496ded

Tags:

Static Stealth

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Creating a process from a recently created file

Changing an executable file

Creating a window

BSOD occurred

Query of malicious DNS domain

Low-level writing

Rewriting of the hard drive's master boot record

Infecting executable files

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm fingerprint lolbin masquerade microsoft_visual_cc packed petya ransomware shell32

Link:

https://www.filescan.io/uploads/66a1859c4c5c17942a7d21db/reports/207f6f5d-d5e6-4b19-99c0-d0cd4a392e9e/overview

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/465c7de4-ef14-48fd-ba56-21a47f34ed87

Result

Threat name:

Bdaejec, Petya

Detection:

malicious

Classification:

rans.spre.troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1482565

Signature

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Antivirus detection for URL or domain

Contains functionality to change the desktop window for a process (likely to hide graphical interactions)

Contains functionality to infect the boot sector

Detected unpacking (changes PE section rights)

Detected unpacking (creates a PE file in dynamic memory)

Found Tor onion address

Infects executable files (exe, dll, sys, html)

Infects the boot sector of the hard disk

Infects the VBR (Volume Boot Record) of the hard disk

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

PE file contains section with special chars

PE file has a writeable .text section

Performs an instant shutdown (NtRaiseHardError)

Uses known network protocols on non-standard ports

Writes directly to the primary disk partition (DR0)

Yara detected Bdaejec

Yara detected Petya ransomware

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/66a64168ef1203b08b4dc0cde4b184c4db9023951f5ce9e12e3f93f3fde17c6d

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/66a64168ef1203b08b4dc0cde4b184c4db9023951f5ce9e12e3f93f3fde17c6d/

Threat name:

Win32.Virus.Wapomi

Status:

Malicious

First seen:

2024-07-24 22:52:10 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

23 of 24 (95.83%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=m2tec2hpcib3bc2nydg6jmmeytnzai4vd5ootyjoh6j7h7pbprwq._file

Verdict:

malicious

Worm.Ramnit

5715421db87e90b962c061ed1a9e6af443f012ddd61d0a0a3450212063416c4d

Worm.Ramnit

f390094eef13ebbc342033020bb8fec8f7d44c9fe90c63738d0b161e762e62aa

Worm.Ramnit

Result

Malware family:

n/a

Score:

7/10

Tags:

aspackv2 bootkit discovery persistence

Link:

https://tria.ge/reports/240724-2te4essaqr/

Behaviour

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Drops file in Program Files directory

Writes to the Master Boot Record (MBR)

ASPack v2.12-2.42

Executes dropped EXE

Loads dropped DLL

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/72f9802e-cdb1-4ee9-b8c8-3aaf9012ed63

Unpacked files

SH256 hash:

66a64168ef1203b08b4dc0cde4b184c4db9023951f5ce9e12e3f93f3fde17c6d

MD5 hash:

8f66e21a56f2a528e13425f89c536979

SHA1 hash:

bf24139904e25a284587281f475584cae889d2ff

Link:

https://www.unpac.me/results/e6bae141-2905-4f2a-ab7b-348a15e5b727/

Malware family:

Petya

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/66a64168ef12/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:	Check_OutputDebugStringA_iat Create hunting rule

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerHiding__Active Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	maldoc_getEIP_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	shellcode Create hunting rule
Author:	nex
Description:	Matched shellcode byte patterns

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Worm.Ramnit

exe 66a64168ef1203b08b4dc0cde4b184c4db9023951f5ce9e12e3f93f3fde17c6d

(this sample)

Link

https://bbs.kafan.cn/forum-31-1.html

Delivery method

Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_NX	Missing Non-Executable Memory Protection	critical
CHECK_PIE	Missing Position-Independent Executable (PIE) Protection	high
CHECK_TRUST_INFO	Requires Elevated Execution (level:requireAdministrator)	high

Reviews

ID	Capabilities	Evidence
AUTH_API	Manipulates User Authorization	ADVAPI32.dll::AllocateAndInitializeSid ADVAPI32.dll::ConvertSidToStringSidW ADVAPI32.dll::ConvertStringSidToSidW ADVAPI32.dll::CopySid ADVAPI32.dll::EqualSid ADVAPI32.dll::FreeSid
SECURITY_BASE_API	Uses Security Base API	ADVAPI32.dll::AddAce ADVAPI32.dll::CheckTokenMembership ADVAPI32.dll::GetAclInformation ADVAPI32.dll::GetSecurityDescriptorControl ADVAPI32.dll::GetSecurityDescriptorDacl ADVAPI32.dll::GetSecurityDescriptorGroup
WIN32_PROCESS_API	Can Create Process and Threads	KERNEL32.dll::CreateProcessW KERNEL32.dll::OpenProcess ADVAPI32.dll::OpenProcessToken ADVAPI32.dll::OpenThreadToken KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThread
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::TerminateProcess KERNEL32.dll::LoadLibraryExW KERNEL32.dll::LoadLibraryW KERNEL32.dll::GetSystemInfo KERNEL32.dll::GetStartupInfoW KERNEL32.dll::GetCommandLineW
WIN_BASE_EXEC_API	Can Execute other programs	KERNEL32.dll::WriteConsoleW KERNEL32.dll::SetStdHandle KERNEL32.dll::GetConsoleCP KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::MoveFileExW SHLWAPI.dll::PathRemoveFileSpecW KERNEL32.dll::RemoveDirectoryW
WIN_REG_API	Can Manipulate Windows Registry	ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegDeleteKeyW ADVAPI32.dll::RegOpenKeyExW ADVAPI32.dll::RegQueryInfoKeyW ADVAPI32.dll::RegQueryValueExW ADVAPI32.dll::RegSetValueExW
WIN_USER_API	Performs GUI Actions	USER32.dll::CloseDesktop USER32.dll::EmptyClipboard USER32.dll::OpenClipboard USER32.dll::PeekMessageW USER32.dll::CreateWindowStationW

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