MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 40c0e71256c3e1eb592155bcd9952f7e5b8cd9f025f5c910cb3a7a643357d81e. 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


AgentTesla


Vendor detections: 5


Intelligence 5 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 40c0e71256c3e1eb592155bcd9952f7e5b8cd9f025f5c910cb3a7a643357d81e
SHA3-384 hash: 32ebcfb2b44de1a56541d62a2909b46024930009d35886d91b201114090cd0b101d6b218db7299afed13fc19a21307e3
SHA1 hash: 19aae5a8b58268cbfe4fd1324698d15fd483192f
MD5 hash: 791be7fec353b0ff21ebc258697f0082
humanhash: vegan-mirror-winter-fourteen
File name:791be7fec353b0ff21ebc258697f0082.rtf
Download: download sample
Signature AgentTesla
Create hunting rule
File size:6'713 bytes
First seen:2020-10-23 07:11:39 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 96:cGsABklF4IwqweXEdrxE/ejtmNBGkCxr7pfq8lxQh6BQcWZGW6sgHnJBDZeTN9HN:ej4Iw7cEue8NYNlFftlXWZlMjDq9HGjw
TLSH C4D12B65DB58791AFE2A1CDE4D52F8A00A2FF11D02E705953BDDD2B23F196154F3041D
Reporter abuse_ch
Tags:AgentTesla CVE-2017-11882 rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
110
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-2.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
Creating a file
Using the Windows Management Instrumentation requests
Sending an HTTP GET request
Launching a file downloaded from the Internet
Creating a process from a recently created file
Unauthorized injection to a system process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/507889
Signature
.NET source code contains very large array initializations
Drops PE files to the user root directory
Found malware configuration
Machine Learning detection for dropped file
Maps a DLL or memory area into another process
May check the online IP address of the machine
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: RegAsm connects to smtp port
Sigma detected: Suspicious Program Location Process Starts
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file access)
Writes to foreign memory regions
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 303032 Sample: wu97jDqFHZ.rtf Startdate: 23/10/2020 Architecture: WINDOWS Score: 100 43 Multi AV Scanner detection for domain / URL 2->43 45 Found malware configuration 2->45 47 Multi AV Scanner detection for dropped file 2->47 49 14 other signatures 2->49 7 EQNEDT32.EXE 12 2->7         started        12 WINWORD.EXE 336 18 2->12         started        14 EQNEDT32.EXE 2->14         started        process3 dnsIp4 33 75.127.1.211, 49165, 80 AS-COLOCROSSINGUS United States 7->33 23 C:\Users\user\AppData\Local\...\kmk[1].exe, PE32 7->23 dropped 25 C:\Users\Public\vbc.exe, PE32 7->25 dropped 59 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->59 16 vbc.exe 7->16         started        file5 signatures6 process7 signatures8 35 Multi AV Scanner detection for dropped file 16->35 37 Machine Learning detection for dropped file 16->37 39 Writes to foreign memory regions 16->39 41 Maps a DLL or memory area into another process 16->41 19 RegAsm.exe 12 14 16->19         started        process9 dnsIp10 27 smtp.yandex.ru 77.88.21.158, 49168, 49170, 587 YANDEXRU Russian Federation 19->27 29 elb097307-934924932.us-east-1.elb.amazonaws.com 50.19.252.36, 443, 49166 AMAZON-AESUS United States 19->29 31 5 other IPs or domains 19->31 51 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->51 53 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 19->53 55 Tries to steal Mail credentials (via file access) 19->55 57 3 other signatures 19->57 signatures11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/40c0e71256c3e1eb592155bcd9952f7e5b8cd9f025f5c910cb3a7a643357d81e/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-10-23 07:13:04 UTC
AV detection:
20 of 48 (41.67%)
Threat level:
  5/5
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger trojan stealer spyware family:agenttesla
Link:
https://tria.ge/reports/201023-gzndbfcxha/
Behaviour
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Suspicious use of SetThreadContext
Looks up external IP address via web service
Loads dropped DLL
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Uses the VBS compiler for execution
Blacklisted process makes network request
Executes dropped EXE
AgentTesla
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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

Web download

AgentTesla

Rich Text Format (RTF) rtf 40c0e71256c3e1eb592155bcd9952f7e5b8cd9f025f5c910cb3a7a643357d81e

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/727688/
  
Delivery method
Distributed via web download

Comments