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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef55bbed02387455cc660149d8933508887ff26c160c8704df2de3cd5d0f7e82. 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


WannaCry


Vendor detections: 13


Intelligence 13 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef55bbed02387455cc660149d8933508887ff26c160c8704df2de3cd5d0f7e82
SHA3-384 hash: ffd72eab91c4c8623adbb6b6542be98833ff6620b9421854aa7e5b8e9844b2902ae18fdc4bb813fca862677ee10af35f
SHA1 hash: cf6c307ad8d95c9b71e0902ad1b45cfbe26278d0
MD5 hash: 2637da2286536690b1649bee21f335c1
humanhash: winter-mountain-virginia-king
File name:2637da2286536690b1649bee21f335c1
Download: download sample
Signature WannaCry
Create hunting rule
File size:5'267'459 bytes
First seen:2025-01-14 19:55:37 UTC
Last seen:Never
File type:DLL dll
MIME type:application/x-dosexec
imphash 2e5708ae5fed0403e8117c645fb23e5b (1'124 x WannaCry, 7 x Worm.Virut, 2 x Expiro)
ssdeep 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:+DqPoBhz1aRxcSUDk36SA
TLSH T1E136335A717CD1FCC106297954A78967E7F33C9A12FE6A0F8F8049A60D13B19BF90A43
TrID 37.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
20.0% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
12.7% (.EXE) Win64 Executable (generic) (10522/11/4)
7.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
Reporter mentality
Tags:dll exe WannaCry

Intelligence

File Origin
# of uploads :
1
# of downloads :
151
Origin country :
CA CA
Vendor Threat Intelligence
Detection(s):
Win.Ransomware.Wanna-9769986-0
Create hunting rule

Win.Ransomware.Wannacryptor-9940180-0
Create hunting rule

Win.Ransomware.Wanacryptor-9942127-1
Create hunting rule

Win.Ransomware.Wannacry-9982112-0
Create hunting rule

Win.Ransomware.WannaCry-10011460-0
Create hunting rule

Win.Ransomware.WannaCry-6313787-0
Create hunting rule

Win.Malware.Djwy-6775897-0
Create hunting rule

Win.Ransomware.Wanna-6888027-0
Create hunting rule

Win.Ransomware.Wanna-6888334-0
Create hunting rule

Win.Malware.Djwy-6923377-0
Create hunting rule

Win.Exploit.Doublepulsar-7427328-0
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6786c1584487910100df0558
Tags:
wannacry madi
Result
Verdict:
Malware
Maliciousness:
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd crypto filecoder lolbin microsoft_visual_cc overlay ransomware smb wanna wannacry wannacrypt wannacryptor
Link:
https://www.filescan.io/uploads/6786c157eab149d1d2341eb4/reports/5d4c39c0-f6e6-4f58-9206-542fbb941ae7/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/ef55bbed02387455cc660149d8933508887ff26c160c8704df2de3cd5d0f7e82
Malware family:
Mimikatz
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/23898324-482e-4c48-b752-a30a0168b3c5
Result
Threat name:
Wannacry
Create hunting rule
Detection:
malicious
Classification:
rans.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1591259
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Connects to many different private IPs (likely to spread or exploit)
Connects to many different private IPs via SMB (likely to spread or exploit)
Detected Wannacry Ransomware
Drops executables to the windows directory (C:\Windows) and starts them
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Tries to download HTTP data from a sinkholed server
Yara detected Wannacry ransomware
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1591259 Sample: mCgW5qofxC.dll Startdate: 14/01/2025 Architecture: WINDOWS Score: 100 47 www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com 2->47 63 Tries to download HTTP data from a sinkholed server 2->63 65 Suricata IDS alerts for network traffic 2->65 67 Malicious sample detected (through community Yara rule) 2->67 69 6 other signatures 2->69 10 loaddll32.exe 1 2->10         started        12 mssecsvc.exe 2->12         started        signatures3 process4 dnsIp5 16 cmd.exe 1 10->16         started        18 rundll32.exe 10->18         started        21 rundll32.exe 1 10->21         started        24 conhost.exe 10->24         started        49 192.168.2.102 unknown unknown 12->49 51 192.168.2.103 unknown unknown 12->51 53 98 other IPs or domains 12->53 79 Connects to many different private IPs via SMB (likely to spread or exploit) 12->79 81 Connects to many different private IPs (likely to spread or exploit) 12->81 signatures6 process7 file8 26 rundll32.exe 16->26         started        61 Drops executables to the windows directory (C:\Windows) and starts them 18->61 28 mssecsvc.exe 7 18->28         started        43 C:\Windows\mssecsvc.exe, PE32 21->43 dropped signatures9 process10 file11 32 mssecsvc.exe 7 26->32         started        45 C:\WINDOWS\qeriuwjhrf (copy), PE32 28->45 dropped 83 Drops executables to the windows directory (C:\Windows) and starts them 28->83 36 tasksche.exe 28->36         started        signatures12 process13 file14 41 C:\Windows\tasksche.exe, PE32 32->41 dropped 55 Antivirus detection for dropped file 32->55 57 Multi AV Scanner detection for dropped file 32->57 59 Machine Learning detection for dropped file 32->59 38 tasksche.exe 32->38         started        signatures15 process16 signatures17 71 Detected Wannacry Ransomware 38->71 73 Antivirus detection for dropped file 38->73 75 Multi AV Scanner detection for dropped file 38->75 77 Machine Learning detection for dropped file 38->77
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ef55bbed02387455cc660149d8933508887ff26c160c8704df2de3cd5d0f7e82
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef55bbed02387455cc660149d8933508887ff26c160c8704df2de3cd5d0f7e82/
Threat name:
Win32.Ransomware.WannaCry
Create hunting rule
Status:
Malicious
First seen:
2018-05-22 19:40:45 UTC
File Type:
PE (Dll)
Extracted files:
4
AV detection:
24 of 24 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=55k3x3ichb2fltdgafe5rezvbceh74tmcygiobg7fxr42xipp2ba._file
Result
Malware family:
wannacry
Create hunting rule
Score:
  10/10
Tags:
family:wannacry discovery ransomware worm
Link:
https://tria.ge/reports/250114-ynnltsxpfw/
Behaviour
Modifies data under HKEY_USERS
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Creates a large amount of network flows
Executes dropped EXE
Contacts a large (3160) amount of remote hosts
Wannacry
Wannacry family
Unpacked files
SH256 hash:
84823e7430ae9e9daeb611e986ca50000a7c66547f5ca060b320101a32a2902c
MD5 hash:
16a8fdd68114c10eae3c843faff5916b
SHA1 hash:
98555ee1fd1b0a1edcdc64ca3cc38bf8da382c76
Detections:
WannaCry
Create hunting rule
Win32_Ransomware_WannaCry
Create hunting rule
ransomware_windows_wannacry
Create hunting rule
WannaCry_Ransomware
Create hunting rule
Link:
https://www.unpac.me/results/72dd138e-1d8b-414c-a4f0-018a0d58a29b/
SH256 hash:
cee373187f0b70f79a3e886fce0a8f128af53637bbeb6e9c50af78a1166b4bef
MD5 hash:
fc9b6711fd800eccbf960932f0e9b75b
SHA1 hash:
54c17f1505a1a908f33ce35238ac32fb8216d113
Detections:
WannaCry
Create hunting rule
Win32_Ransomware_WannaCry
Create hunting rule
ransomware_windows_wannacry
Create hunting rule
WannaCry_Ransomware
Create hunting rule
WannaCry_Ransomware_Gen
Create hunting rule
Link:
https://www.unpac.me/results/72dd138e-1d8b-414c-a4f0-018a0d58a29b/
SH256 hash:
ef55bbed02387455cc660149d8933508887ff26c160c8704df2de3cd5d0f7e82
MD5 hash:
2637da2286536690b1649bee21f335c1
SHA1 hash:
cf6c307ad8d95c9b71e0902ad1b45cfbe26278d0
Detections:
WannaCry
Create hunting rule
Link:
https://www.unpac.me/results/72dd138e-1d8b-414c-a4f0-018a0d58a29b/
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/ef55bbed02387455cc660149d8933508887ff26c160c8704df2de3cd5d0f7e82

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:Armadillov1xxv2xx
Create hunting rule
Author:malware-lu
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:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:SUSP_Imphash_Mar23_2
Create hunting rule
Author:Arnim Rupp (https://github.com/ruppde)
Description:Detects imphash often found in malware samples (Zero hits with with search for 'imphash:x p:0' on Virustotal)
Reference:Internal Research
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:WannaCry_Ransomware
Create hunting rule
Author:Florian Roth (Nextron Systems) (with the help of binar.ly)
Description:Detects WannaCry Ransomware
Reference:https://goo.gl/HG2j5T

File information

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

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_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessA
KERNEL32.dll::CloseHandle
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateFileA

Comments