MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 51199cea04eb2b6a2d5e9b124168cff917cc030e35c77959c1d7ee57d17b8c5f. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 51199cea04eb2b6a2d5e9b124168cff917cc030e35c77959c1d7ee57d17b8c5f
SHA3-384 hash: 2f40e03c6cb98ca436200c8e46cb0afa2e565b3a1d6a9e58fa7233f4fc79c7700e52bdb25d2ea65db884f4cb749fb6b6
SHA1 hash: 5415c91e657d59d5a09608f7607c2cedfe67e829
MD5 hash: eb6e7f317f3bd7a9b9741adbf2e95425
humanhash: mockingbird-uncle-alpha-summer
File name:OSW.exe
Download: download sample
Signature MassLogger
Create hunting rule
File size:1'926'656 bytes
First seen:2020-10-20 19:00:00 UTC
Last seen:2020-10-20 19:44:18 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 3072:cSi2Lu5V8kDZoXEiLOH7A9F0gG9jTrgViBMxtimXncxXH7Yv36AZXKW64anDknB4:cS/Lu5VBDZoXEiabO
Threatray 372 similar samples on MalwareBazaar
TLSH 5F95C83DADD5223756BBD6BACAF559CBF912754331526C0E50DB03860A03BAB7EC201E
Reporter srcr
Tags:exe MassLogger


Avatar
srcr
Sample source: http://awa-kenya.com/Img/OSW.exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
81
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/73620/
Detection(s):
SecuriteInfo.com.Trojan.Inject4.3606.28474.26001.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a file in the %AppData% subdirectories
Unauthorized injection to a recently created process
Launching a process
Creating a file
DNS request
Sending an HTTP GET request
Using the Windows Management Instrumentation requests
Creating a window
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
Threat name:
MassLogger RAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/498651
Signature
.NET source code contains very large strings
Adds a directory exclusion to Windows Defender
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
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)
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: 301340 Sample: OSW.exe Startdate: 20/10/2020 Architecture: WINDOWS Score: 100 53 Multi AV Scanner detection for dropped file 2->53 55 Multi AV Scanner detection for submitted file 2->55 57 Yara detected MassLogger RAT 2->57 59 8 other signatures 2->59 7 OSW.exe 1 4 2->7         started        11 vlc.exe 2->11         started        13 vlc.exe 1 2->13         started        process3 file4 29 C:\Users\user\AppData\Roaming\...\vlc.exe, PE32 7->29 dropped 31 C:\Users\user\...\vlc.exe:Zone.Identifier, ASCII 7->31 dropped 33 C:\Users\user\AppData\Local\...\OSW.exe.log, ASCII 7->33 dropped 61 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 7->61 63 Adds a directory exclusion to Windows Defender 7->63 65 Injects a PE file into a foreign processes 7->65 15 OSW.exe 15 2 7->15         started        19 powershell.exe 25 7->19         started        21 OSW.exe 7->21         started        23 vlc.exe 11->23         started        25 vlc.exe 13->25         started        signatures5 process6 dnsIp7 35 elb097307-934924932.us-east-1.elb.amazonaws.com 23.21.109.69, 49737, 49762, 80 AMAZON-AESUS United States 15->35 37 nagano-19599.herokussl.com 15->37 39 api.ipify.org 15->39 49 Tries to steal Mail credentials (via file access) 15->49 27 conhost.exe 19->27         started        45 2 other IPs or domains 23->45 51 Tries to harvest and steal browser information (history, passwords, etc) 23->51 41 54.225.169.28, 49761, 80 AMAZON-AESUS United States 25->41 43 192.168.2.1 unknown unknown 25->43 47 2 other IPs or domains 25->47 signatures8 process9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/51199cea04eb2b6a2d5e9b124168cff917cc030e35c77959c1d7ee57d17b8c5f/
Threat name:
ByteCode-MSIL.Trojan.Variadic
Create hunting rule
Status:
Malicious
First seen:
2020-10-20 08:38:34 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kemzz2qe5mvwulk6tmjec2gp7el4yayogxdxswob27xfpul3rrpq._file
Verdict:
malicious
Label(s):
masslogger
Create hunting rule
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1d3286d29155618ebaf43cfebc809f80daa7d247b9e3c872ea5c48c8109afcd0
MassLogger
1e3f14f932364db4904b69fce12e373e6354f4291dcda0d82a8477a21a9a803f
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5dd8cf7e789bc36a9a069cf42247f758e8900f8913c88e5ac84328d30e6d7c99
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74162983ed626c05ba65a31fa71a81ff2bc4cabcfe5019a94f63dc32ae873f23
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8f24b4adb843172c14b392bcf73f1f46ac8a20091cb22649110bb937f84b281c
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9f0866780aa84107697212f1b3578777c450861c02a6e01f5741de28c858900c
MassLogger
aed72cebee92e2652dddfbec6aa2b2728183b03c62835a2a860480963cae856f
MassLogger
ce073fce9de335c288fe205d5bf7fbdd9fd3ecc718821116dbad098f176a69de
MassLogger
+ 362 additional samples on MalwareBazaar
Result
Malware family:
masslogger
Create hunting rule
Score:
  10/10
Tags:
persistence stealer spyware family:masslogger
Link:
https://tria.ge/reports/201020-4wbhpqkye2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
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:
51199cea04eb2b6a2d5e9b124168cff917cc030e35c77959c1d7ee57d17b8c5f
MD5 hash:
eb6e7f317f3bd7a9b9741adbf2e95425
SHA1 hash:
5415c91e657d59d5a09608f7607c2cedfe67e829
Link:
https://www.unpac.me/results/f6b1f68c-130d-4444-9a5c-6586c0250dbb/
SH256 hash:
431f589e72f261c107ddf4097fb86c4374b9732def7f1b7be67bfcdd9324b67b
MD5 hash:
fc449629812cce14e017c210e7ffbfba
SHA1 hash:
a742e43a42709099b8106a16ae1ae9d5f72cdded
Detections:
win_masslogger_w0
Create hunting rule
Link:
https://www.unpac.me/results/f6b1f68c-130d-4444-9a5c-6586c0250dbb/
SH256 hash:
2717e1a3e9abfd4ffcc57f9d99b7bed7508360a177c7ab25c613f28f0509a45a
MD5 hash:
2baeb882f40cefcc001e6dbc9e9acc9f
SHA1 hash:
4565f0e522b1d9a514a59b14311d75842c611445
Link:
https://www.unpac.me/results/f6b1f68c-130d-4444-9a5c-6586c0250dbb/
SH256 hash:
c77b8e0c86ae52d19d31d70bd7add6f85b3baee6f39250b06242344937bfa3df
MD5 hash:
9487f12add5f6c191b7ca4deb03c2ec7
SHA1 hash:
d1f2eb7aa9f799ac6ab4067dc3860fb0ba7bd73a
Link:
https://www.unpac.me/results/f6b1f68c-130d-4444-9a5c-6586c0250dbb/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/51199cea04eb2b6a2d5e9b124168cff917cc030e35c77959c1d7ee57d17b8c5f

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_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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/73620/
  
URLhaus
https://urlhaus.abuse.ch/url/727619/

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