MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 938b890d0441ae6c38e5e0deb5192cf63b3cc45a9f85ff2085f470afbac98b62. 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: 6


Intelligence 6 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 938b890d0441ae6c38e5e0deb5192cf63b3cc45a9f85ff2085f470afbac98b62
SHA3-384 hash: 00800caa7a502a2a389b38c90b98858d527e884534c1c40cfacc2b841f0a5e828d2a10a76f10bebf7473e6e48cd971b8
SHA1 hash: 4ab49b730e47012b66873dec582a54eb7706f1c6
MD5 hash: 3a9d2cf7fab58d2345366302c45de71f
humanhash: bulldog-muppet-helium-don
File name:3a9d2cf7fab58d2345366302c45de71f.rtf
Download: download sample
Signature AgentTesla
Create hunting rule
File size:13'483 bytes
First seen:2020-10-10 11:20:58 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 192:ou5LCv3QANoHMxVUuOivMK1OHnbPPhKWvo:bhCIA2WVUunIKj
TLSH 5652C59E4A67182AF6292C7E4E15F4790A2FF43635D085903B9CE771BE3E4418F22B1C
Reporter abuse_ch
Tags:AgentTesla rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
192
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
Creating a file
Creating a process with a hidden window
DNS request
Sending a custom TCP request
Adding an access-denied ACE
Using the Windows Management Instrumentation requests
Launching a file downloaded from the Internet
Unauthorized injection to a recently created process by context flags manipulation
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/487496
Signature
Connects to a pastebin service (likely for C&C)
Drops PE files to the user root directory
Hides threads from debuggers
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
May check the online IP address of the machine
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: Suspicious Program Location Process Starts
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 296190 Sample: xtKCPPNMhz.rtf Startdate: 10/10/2020 Architecture: WINDOWS Score: 100 35 smtp.privateemail.com 2->35 53 Multi AV Scanner detection for dropped file 2->53 55 Multi AV Scanner detection for submitted file 2->55 57 Yara detected AgentTesla 2->57 59 11 other signatures 2->59 8 EQNEDT32.EXE 12 2->8         started        13 WINWORD.EXE 336 18 2->13         started        15 EQNEDT32.EXE 2->15         started        signatures3 process4 dnsIp5 43 149.202.110.47, 49165, 80 OVHFR France 8->43 29 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 8->29 dropped 31 C:\Users\Public\vbc.exe, PE32 8->31 dropped 63 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 8->63 17 vbc.exe 12 8->17         started        file6 signatures7 process8 dnsIp9 33 pastebin.com 104.23.99.190, 443, 49166 CLOUDFLARENETUS United States 17->33 45 Multi AV Scanner detection for dropped file 17->45 47 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 17->47 49 Machine Learning detection for dropped file 17->49 51 3 other signatures 17->51 21 vbc.exe 4 17->21         started        25 timeout.exe 17->25         started        27 vbc.exe 17->27         started        signatures10 process11 dnsIp12 37 elb097307-934924932.us-east-1.elb.amazonaws.com 54.225.66.103, 443, 49167 AMAZON-AESUS United States 21->37 39 nagano-19599.herokussl.com 21->39 41 api.ipify.org 21->41 61 Installs a global keyboard hook 21->61 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/938b890d0441ae6c38e5e0deb5192cf63b3cc45a9f85ff2085f470afbac98b62/
Threat name:
Win32.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-10-10 01:10:03 UTC
AV detection:
13 of 29 (44.83%)
Threat level:
  5/5
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
spyware keylogger trojan stealer family:agenttesla
Link:
https://tria.ge/reports/201010-qbcnkvb9na/
Behaviour
Delays execution with timeout.exe
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
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
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
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.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/938b890d0441ae6c38e5e0deb5192cf63b3cc45a9f85ff2085f470afbac98b62

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 938b890d0441ae6c38e5e0deb5192cf63b3cc45a9f85ff2085f470afbac98b62

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/678623/
  
Delivery method
Distributed via web download

Comments