MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6d6224681c25a1b844d3cb183b6f852af8724c0cb25815aaf9e50ff00a6fddcf. 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: 9


Intelligence 9 IOCs YARA File information Comments

SHA256 hash: 6d6224681c25a1b844d3cb183b6f852af8724c0cb25815aaf9e50ff00a6fddcf
SHA3-384 hash: fc0c36a4149c8caa03f4263528c6799d7c6a734ae2a000e15a83debffebbfd2b29edcb47d47bc98f5b457127ad2cec2b
SHA1 hash: a9ee4ebe7c0d1071dba183287c2b5443b01af792
MD5 hash: 32b8a98b6b3db245201d0b91a8d0a200
humanhash: india-salami-november-mountain
File name:assembly
Download: download sample
Signature MassLogger
File size:725'504 bytes
First seen:2020-08-26 08:32:42 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (28'877 x AgentTesla, 8'705 x Formbook, 4'202 x Loki)
ssdeep 12288:NqzbqrJonXSEWK93bW2VpajKop0S7i/hy6Q5f3tQI852RRfr6hzw:AbYJEzBR6KoppYY6q22RRfrV
Threatray 997 similar samples on MalwareBazaar
TLSH F8F402EE12EC6B5EDC0F5C34987F53B262A2B0442AC2D88BEBF419D616D0F069543C9C
Reporter @Libranalysis
Tags:Dotnet Loader MassLogger ReZer0v4


Twitter
@Libranalysis
A detailed analysis is available at: https://maxkersten.nl/binary-analysis-course/malware-analysis/rezer0v4-loader/

Intelligence


File Origin
# of uploads :
1
# of downloads :
107
Origin country :
NL NL
Mail intelligence
No data
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Using the Windows Management Instrumentation requests
Creating a file
Running batch commands
Enabling autorun by creating a file
Deleting of the original file
Result
Threat name:
MassLogger RAT
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Scheduled temp file as task from temp location
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected MassLogger RAT
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 278278 Sample: assembly Startdate: 27/08/2020 Architecture: WINDOWS Score: 100 78 Antivirus detection for dropped file 2->78 80 Antivirus / Scanner detection for submitted sample 2->80 82 Multi AV Scanner detection for dropped file 2->82 84 10 other signatures 2->84 11 assembly.exe 4 2->11         started        process3 file4 70 C:\Users\user\AppData\...\JyVNBfjFOm.exe, PE32 11->70 dropped 72 C:\Users\...\JyVNBfjFOm.exe:Zone.Identifier, ASCII 11->72 dropped 74 C:\Users\user\AppData\Local\...\tmpD379.tmp, XML 11->74 dropped 88 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->88 90 Injects a PE file into a foreign processes 11->90 15 assembly.exe 1 11->15         started        18 assembly.exe 4 11->18         started        21 schtasks.exe 1 11->21         started        signatures5 process6 file7 92 Injects a PE file into a foreign processes 15->92 23 assembly.exe 15->23         started        26 assembly.exe 3 15->26         started        68 C:\Users\user\AppData\...\assembly.exe.log, ASCII 18->68 dropped 28 cmd.exe 1 18->28         started        30 conhost.exe 21->30         started        signatures8 process9 signatures10 86 Injects a PE file into a foreign processes 23->86 32 assembly.exe 23->32         started        35 assembly.exe 23->35         started        37 assembly.exe 23->37         started        45 2 other processes 23->45 39 cmd.exe 26->39         started        41 powershell.exe 19 28->41         started        43 conhost.exe 28->43         started        process11 signatures12 76 Injects a PE file into a foreign processes 32->76 47 assembly.exe 32->47         started        50 assembly.exe 32->50         started        52 cmd.exe 35->52         started        54 conhost.exe 39->54         started        56 powershell.exe 39->56         started        process13 signatures14 94 Writes to foreign memory regions 47->94 96 Allocates memory in foreign processes 47->96 98 Injects a PE file into a foreign processes 47->98 58 cmd.exe 50->58         started        60 conhost.exe 52->60         started        62 powershell.exe 52->62         started        process15 process16 64 conhost.exe 58->64         started        66 powershell.exe 58->66         started       
Threat name:
ByteCode-MSIL.Infostealer.Agentesla
Status:
Malicious
First seen:
2020-08-26 08:34:07 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
21 of 27 (77.78%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  9/10
Tags:
rezer0
Behaviour
rezer0

File information


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

Comments