MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4ef9ce3e9a540b8095c436454b0cc9d5dc5be454f46d27e90cf404e02d0d1eff. 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


MassLogger


Vendor detections: 7


Intelligence 7 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4ef9ce3e9a540b8095c436454b0cc9d5dc5be454f46d27e90cf404e02d0d1eff
SHA3-384 hash: b20c5d3999b236f88f88eb288469a12321801233c3ebc7fd43af1648b4ad1a8005ddd9943611619221138ec932382f29
SHA1 hash: 3fd91561af8ae5839e5d7154c441bfd87f1cd4d5
MD5 hash: 5e4648f832d6575597abd4ec0d8db8d0
humanhash: alanine-lima-hydrogen-texas
File name:5e4648f832d6575597abd4ec0d8db8d0.exe
Download: download sample
Signature MassLogger
Create hunting rule
File size:1'722'880 bytes
First seen:2020-11-11 08:25:39 UTC
Last seen:2020-11-11 09:47:21 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:L9v7c4YzoDBcZSNmzqJZBx0F3qA58x9bRCQGEK5jWzDmizUs302dVL8ctWYdEOv8:Li9iYodvqWYuUXoRKBI4BlCb
TLSH 8A851B58A4D8A38BC83737B99B3915B5C3B0CE6602B9C6D740DC78F66E6DC768B71804
Reporter abuse_ch
Tags:exe MassLogger


Avatar
abuse_ch
MassLogger SMTP exfil server:
mail.hkoffice365.com:587

Intelligence

File Origin
# of uploads :
2
# of downloads :
109
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Artemis5E4648F832D6.18973.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% subdirectories
Unauthorized injection to a recently created process
Creating a file
DNS request
Sending an HTTP GET request
Using the Windows Management Instrumentation requests
Reading critical registry keys
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Setting a global event handler for the keyboard
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
MassLogger RAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
92 / 100
Link:
https://www.joesandbox.com/analysis/529992
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
May check the online IP address of the machine
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Yara detected Costura Assembly Loader
Yara detected MassLogger RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 314094 Sample: h5I9F5YQyX.exe Startdate: 11/11/2020 Architecture: WINDOWS Score: 92 42 Yara detected MassLogger RAT 2->42 44 .NET source code contains method to dynamically call methods (often used by packers) 2->44 46 .NET source code references suspicious native API functions 2->46 48 6 other signatures 2->48 6 h5I9F5YQyX.exe 1 6 2->6         started        10 vlc.exe 2 2->10         started        12 vlc.exe 3 2->12         started        process3 file4 22 C:\Users\user\AppData\Roaming\...\vlc.exe, PE32 6->22 dropped 24 C:\Users\user\...\vlc.exe:Zone.Identifier, ASCII 6->24 dropped 26 C:\Users\user\AppData\...\h5I9F5YQyX.exe.log, ASCII 6->26 dropped 50 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 6->50 14 h5I9F5YQyX.exe 15 2 6->14         started        52 Injects a PE file into a foreign processes 10->52 18 vlc.exe 10->18         started        20 vlc.exe 14 2 12->20         started        signatures5 process6 dnsIp7 28 elb097307-934924932.us-east-1.elb.amazonaws.com 184.73.247.141, 49739, 49749, 49750 AMAZON-AESUS United States 14->28 30 192.168.2.1 unknown unknown 14->30 40 2 other IPs or domains 14->40 54 Tries to steal Mail credentials (via file access) 14->54 32 nagano-19599.herokussl.com 18->32 34 api.ipify.org 18->34 36 nagano-19599.herokussl.com 20->36 38 api.ipify.org 20->38 56 Tries to harvest and steal browser information (history, passwords, etc) 20->56 signatures8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4ef9ce3e9a540b8095c436454b0cc9d5dc5be454f46d27e90cf404e02d0d1eff/
Threat name:
ByteCode-MSIL.Backdoor.Crysan
Create hunting rule
Status:
Malicious
First seen:
2020-11-11 08:26:06 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=j3444pu2kqfybfoegzcuwdgj2xofxzcu6rwsp2im6qcoalind37q._file
Result
Malware family:
masslogger
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Score:
  10/10
Tags:
family:masslogger persistence spyware stealer
Link:
https://tria.ge/reports/201111-cx555g7y32/
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Checks computer location settings
Reads user/profile data of web browsers
MassLogger
MassLogger Main Payload
Unpacked files
SH256 hash:
4ef9ce3e9a540b8095c436454b0cc9d5dc5be454f46d27e90cf404e02d0d1eff
MD5 hash:
5e4648f832d6575597abd4ec0d8db8d0
SHA1 hash:
3fd91561af8ae5839e5d7154c441bfd87f1cd4d5
Link:
https://www.unpac.me/results/8e16de33-c5f9-4652-a511-e032f1aaa96f/
SH256 hash:
94bf744d73fa2d4debfe46070210c6683c5b8a0c2cb67bde561072c1bab24b5c
MD5 hash:
b347a9f789ceb594e21684cd0070b86a
SHA1 hash:
1680298c7bf5a9c32418a5d2c138085efd178cc8
Link:
https://www.unpac.me/results/8e16de33-c5f9-4652-a511-e032f1aaa96f/
SH256 hash:
b0011f1ab1c719718cf74e34fd491ba5fa34d23749e40cac3e18b275bbed88f1
MD5 hash:
39bdbe25db04fd9db199043854aa3b58
SHA1 hash:
3af5df3a2ab504d7133cce1a4222d7ae43670569
Detections:
win_masslogger_w0
Create hunting rule
Link:
https://www.unpac.me/results/8e16de33-c5f9-4652-a511-e032f1aaa96f/
Parent samples :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 hash:
83c08f0721c8b0c96e3d6a8f3ccaf5c96fbcc427d574625c34424c3429fefaa1
MD5 hash:
3c5dbcc3bb27e913e14efd8054811373
SHA1 hash:
b0eba9388abddaef9d5aa49ccd5dbab2924cced0
Link:
https://www.unpac.me/results/8e16de33-c5f9-4652-a511-e032f1aaa96f/
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:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:MassLogger
Create hunting rule
Author:kevoreilly
Description:MassLogger
Rule name:masslogger_gcch
Create hunting rule
Author:govcert_ch
Rule name:win_masslogger_w0
Create hunting rule
Author:govcert_ch

File information

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

Web download

MassLogger

Executable exe 4ef9ce3e9a540b8095c436454b0cc9d5dc5be454f46d27e90cf404e02d0d1eff

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/780207/
  
Delivery method
Distributed via web download

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