MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d. 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


Medusa


Vendor detections: 17


Intelligence 17 IOCs YARA 15 File information Comments
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SHA256 hash: 91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d
SHA3-384 hash: d5499367c7284ea7939b14c186fc7552c463542ce271e1ccbaa57ea504b8f25c91c09eb5a162c8a2860b99c623fabca5
SHA1 hash: a8b0861e4596d21d1a2903dc3add32e1989ce723
MD5 hash: ec5b1a6de3564c26c4e0e804e6bc2ecb
humanhash: black-tennessee-high-friend
File name:91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d
Download: download sample
Signature Medusa
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File size:638'976 bytes
First seen:2024-12-12 18:24:24 UTC
Last seen:2025-04-29 15:44:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 82a8292007e682f1a127ba8dcebfae96 (24 x Medusa)
ssdeep 12288:vRdW6SXZbE3ZoBUMv+bFDYBJQsZwhHQWIZ6+aAvtKJCO1Mw2BhgWpndg80EIwbSe:bmpThJmVSvGWEcXvvKw4IRRs3WPOFqp
TLSH T172D49F253482C136E57201314E5CABB661BFFC314B734DEBA7905A5E5A382E06F3297B
TrID 32.2% (.EXE) Win64 Executable (generic) (10522/11/4)
20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.4% (.EXE) Win16 NE executable (generic) (5038/12/1)
13.7% (.EXE) Win32 Executable (generic) (4504/4/1)
6.2% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
Reporter 0x0d4y
Tags:exe Medusa MedusaLocker

Intelligence

File Origin
# of uploads :
2
# of downloads :
477
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
gaze.exe
Verdict:
Malicious activity
Analysis date:
2024-10-01 01:16:39 UTC
Tags:
xor-url generic
Link:
https://app.any.run/tasks/4ad3279a-ae64-4b9d-a6cb-a95a86148354

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Ransomware.Medusa-10025438-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=675b2ce5e19061cac7f103e2
Tags:
ransomware virus sage
Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Launching a process
Launching the process to interact with network services
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
crypto fingerprint hacktool medusa medusalocker microsoft_visual_cc obfuscated ransomware
Link:
https://www.filescan.io/uploads/675b2a80b58556cdb519582d/reports/80224b12-b857-4cf6-8303-0437a9698a75/overview
Verdict:
Malicious
Labled as:
Ransom.Imps.Generic
Link:
https://www.hybrid-analysis.com/sample/91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d
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.
Malware family:
Medusa
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/652751b7-c3d1-4e5c-a962-ce7b3f69b5d8
Result
Threat name:
MedusaLocker
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Detection:
malicious
Classification:
rans.spre.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1573983
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Contains functionality to encrypt and move a file in one function
Creates files in the recycle bin to hide itself
Deletes shadow drive data (may be related to ransomware)
Disables security and backup related services
Found ransom note / readme
Found Tor onion address
Infects executable files (exe, dll, sys, html)
Multi AV Scanner detection for submitted file
Query firmware table information (likely to detect VMs)
Sigma detected: Suspicious Windows Service Tampering
Writes a notice file (html or txt) to demand a ransom
Yara detected MedusaLocker Ransomware
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1573983 Sample: McwBk9xjSj.exe Startdate: 12/12/2024 Architecture: WINDOWS Score: 100 45 Antivirus / Scanner detection for submitted sample 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 Found ransom note / readme 2->49 51 4 other signatures 2->51 7 McwBk9xjSj.exe 1002 2->7         started        process3 file4 37 C:\ProgramData\...\!!!READ_ME_MEDUSA!!!.txt, ASCII 7->37 dropped 39 C:\ProgramData\...\!!!READ_ME_MEDUSA!!!.txt, ASCII 7->39 dropped 41 C:\ProgramData\...\!!!READ_ME_MEDUSA!!!.txt, ASCII 7->41 dropped 43 8 other malicious files 7->43 dropped 53 Query firmware table information (likely to detect VMs) 7->53 55 Creates files in the recycle bin to hide itself 7->55 57 Contains functionality to encrypt and move a file in one function 7->57 59 5 other signatures 7->59 11 net.exe 1 7->11         started        13 net.exe 7->13         started        15 net.exe 7->15         started        17 17 other processes 7->17 signatures5 process6 process7 19 conhost.exe 11->19         started        21 net1.exe 11->21         started        23 conhost.exe 13->23         started        25 net1.exe 13->25         started        27 conhost.exe 15->27         started        29 net1.exe 15->29         started        31 conhost.exe 17->31         started        33 net1.exe 17->33         started        35 30 other processes 17->35
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d/
Threat name:
Win32.Ransomware.Medusa
Create hunting rule
Status:
Malicious
First seen:
2024-09-30 08:26:13 UTC
File Type:
PE (Exe)
Extracted files:
1
AV detection:
31 of 38 (81.58%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=sgr3qmswjknss2c3he6ixwuzewt5vb75hfmgewma3idpqd3wccoq._file
Verdict:
malicious
Label(s):
genericransomware
Create hunting rule
medusaransomware
Create hunting rule
Similar samples:
error
Medusa
Result
Malware family:
medusaransomware
Create hunting rule
Score:
  10/10
Tags:
family:medusaransomware credential_access defense_evasion discovery execution impact persistence ransomware spyware stealer
Link:
https://tria.ge/reports/241212-w2ly2ssngv/
Behaviour
Interacts with shadow copies
Kills process with taskkill
Modifies registry class
Runs net.exe
Runs ping.exe
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Uses Volume Shadow Copy service COM API
Browser Information Discovery
Program crash
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Drops file in Program Files directory
Drops desktop.ini file(s)
Enumerates connected drives
Network Share Discovery
Credentials from Password Stores: Windows Credential Manager
Drops startup file
Reads user/profile data of web browsers
Boot or Logon Autostart Execution: Active Setup
Deletes shadow copies
Renames multiple (8871) files with added filename extension
Medusa Ransomware
Medusaransomware family
Verdict:
Malicious
Tags:
Win.Ransomware.Medusa-10025438-0
YARA:
n/a
Link:
https://app.threat.zone/submission/b5678b68-2583-4690-abd2-bf2751f73f06
Unpacked files
SH256 hash:
91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d
MD5 hash:
ec5b1a6de3564c26c4e0e804e6bc2ecb
SHA1 hash:
a8b0861e4596d21d1a2903dc3add32e1989ce723
Detections:
SUSP_XORed_URL_In_EXE
Create hunting rule
Link:
https://www.unpac.me/results/872bb6b8-9a4f-466f-8c65-7cc398cf4ea6/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/91a3b832564a9b29685b393c8bda9925a7da87fd3958625980da06f80f76109d

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:CMD_Ping_Localhost
Create hunting rule
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:medusa_ransomware
Create hunting rule
Rule name:Nymaim
Create hunting rule
Author:Chaitanya
Description:Nymaim Loader
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:SUSP_XORed_URL_In_EXE
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834
Rule name:SUSP_XORed_URL_in_EXE_RID2E46
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Author:Florian Roth
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834

File information

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

Malpedia
Malpedia
https://malpedia.caad.fkie.fraunhofer.de/details/win.medusalocker

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessA
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetDriveTypeW
KERNEL32.dll::GetStartupInfoW
KERNEL32.dll::GetDiskFreeSpaceExW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleWindow
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateFileW
KERNEL32.dll::MoveFileW
KERNEL32.dll::GetFileAttributesW
WIN_BCRYPT_APICan Encrypt Filesbcrypt.dll::BCryptCreateHash
bcrypt.dll::BCryptDestroyKey
bcrypt.dll::BCryptEncrypt
bcrypt.dll::BCryptFinishHash
bcrypt.dll::BCryptGenerateSymmetricKey
bcrypt.dll::BCryptGetProperty
WIN_CRYPT_APIUses Windows Crypt APICRYPT32.dll::CryptDecodeObjectEx
bcrypt.dll::BCryptHashData
bcrypt.dll::BCryptImportKeyPair

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