MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4dd950fcdcd8483ec9346b4a5214931134975c439cf463daa3a0518cfc5db9a6. 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


MedusaLocker


Vendor detections: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4dd950fcdcd8483ec9346b4a5214931134975c439cf463daa3a0518cfc5db9a6
SHA3-384 hash: 4237d6965be6e5d42865d03dae3ea909342c4f3e3bd3dc11d2f36fb80121e5058357875530e6c094fa42a170e47b3e9d
SHA1 hash: 0ed870df940076422ccccc9dd81154d728bb5da3
MD5 hash: c759e2a5bc28804347759869e6370b42
humanhash: florida-blue-july-hydrogen
File name:4dd950fcdcd8483ec9346b4a5214931134975c439cf463daa3a0518cfc5db9a6.bin
Download: download sample
Signature MedusaLocker
Create hunting rule
File size:3'672'392 bytes
First seen:2021-03-29 20:48:25 UTC
Last seen:2021-03-29 21:44:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 56f52fe51ac6695ebdcb4c51172b21df (2 x MedusaLocker)
ssdeep 98304:nMY7F3ugutj+mPHHsOTL+bUFbPYRRdqLUJKGjkfVE:nJ5ugZSHs8LEUJ8dqwHoK
TLSH FA062373B76BACD8CC56F5B06F11409467C41353F2823EAC32A06A87DE34956DAB87C9
Reporter Arkbird_SOLG
Tags:MedusaLocker Ransomware


Avatar
ArkbirdDevil
Thanks to @c3rb3ru5d3d53c for the sample

Intelligence

File Origin
# of uploads :
2
# of downloads :
362
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Medusalocker
Create hunting rule
Link:
https://www.capesandbox.com/analysis/127814/
Detection(s):
SecuriteInfo.com.Trojan.Siggen12.60448.21073.28027.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for analyzing tools
Searching for the window
Creating a file in the %AppData% directory
Creating a file
Enabling the 'hidden' option for recently created files
Sending a custom TCP request
Launching a process
Creating a file in the Windows subdirectories
Moving a file to the Windows subdirectory
Replacing files
Launching a service
Changing a file
Moving a recently created file
Sending a UDP request
Moving a file to the Program Files subdirectory
Moving a system file
Modifying a system file
Deleting volume shadow copies
Preventing system recovery
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Creating a file in the mass storage device
Encrypting user's files
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/e53a1721-ba49-4118-805e-fa57d53e8e38
Result
Threat name:
Unknown
Detection:
malicious
Classification:
rans.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/657351
Signature
Deletes shadow drive data (may be related to ransomware)
Hides threads from debuggers
May disable shadow drive data (uses vssadmin)
Multi AV Scanner detection for submitted file
PE file contains section with special chars
Query firmware table information (likely to detect VMs)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Uses bcdedit to modify the Windows boot settings
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 377603 Sample: VOICKR0dl9 Startdate: 29/03/2021 Architecture: WINDOWS Score: 80 38 Multi AV Scanner detection for submitted file 2->38 40 PE file contains section with special chars 2->40 42 Deletes shadow drive data (may be related to ransomware) 2->42 8 VOICKR0dl9.exe 4 2 2->8         started        process3 dnsIp4 36 192.168.2.1 unknown unknown 8->36 44 Query firmware table information (likely to detect VMs) 8->44 46 May disable shadow drive data (uses vssadmin) 8->46 48 Tries to detect sandboxes and other dynamic analysis tools (window names) 8->48 50 4 other signatures 8->50 12 vssadmin.exe 1 8->12         started        14 vssadmin.exe 1 8->14         started        16 vssadmin.exe 1 8->16         started        18 14 other processes 8->18 signatures5 process6 process7 20 conhost.exe 12->20         started        22 conhost.exe 14->22         started        24 conhost.exe 16->24         started        26 conhost.exe 18->26         started        28 conhost.exe 18->28         started        30 conhost.exe 18->30         started        32 9 other processes 18->32 process8 34 conhost.exe 20->34         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4dd950fcdcd8483ec9346b4a5214931134975c439cf463daa3a0518cfc5db9a6/
Threat name:
Win64.Ransomware.Medusalocker
Create hunting rule
Status:
Malicious
First seen:
2021-03-29 20:49:06 UTC
AV detection:
13 of 29 (44.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jxmvb7g43bed5sjunnffefetce2joxcdtt2ghwvdubiyz7c5xgta._file
Result
Malware family:
n/a
Score:
  9/10
Tags:
evasion persistence ransomware spyware stealer themida trojan
Link:
https://tria.ge/reports/210329-rgdrvwycee/
Behaviour
Interacts with shadow copies
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System policy modification
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Checks whether UAC is enabled
Drops desktop.ini file(s)
Enumerates connected drives
Checks BIOS information in registry
Deletes itself
Reads user/profile data of web browsers
themida
Deletes System State backups
Drops file in Drivers directory
Modifies extensions of user files
Deletes shadow copies
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Modifies boot configuration data using bcdedit
Unpacked files
SH256 hash:
4dd950fcdcd8483ec9346b4a5214931134975c439cf463daa3a0518cfc5db9a6
MD5 hash:
c759e2a5bc28804347759869e6370b42
SHA1 hash:
0ed870df940076422ccccc9dd81154d728bb5da3
Link:
https://www.unpac.me/results/12bdb7d3-c56f-40c4-abdd-7946a2f9c2dd/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Ransomware
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4dd950fcdcd8483ec9346b4a5214931134975c439cf463daa3a0518cfc5db9a6

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:INDICATOR_EXE_Packed_Themida
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with Themida

File information

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

  
X
https://twitter.com/jfslowik/status/1376580936645582856
Cape
Cape
https://www.capesandbox.com/analysis/127814/

Comments