MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff. 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: 13


Intelligence 13 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff
SHA3-384 hash: 6c44550d663d35dcd17a8c68c133645937f7b916c4edea9b672421493f1593e932b0f955e7d8dd027876a59237138467
SHA1 hash: a82c7c49fbcb5158251aa77276167bcafad6dc69
MD5 hash: b437cdb4742fbfa853685f76e28fc045
humanhash: arizona-spring-helium-jupiter
File name:microsoftdecentipdationinstalledonpcfortestthesecuritycheckingfromtheentireprocess.doC
Download: download sample
Signature AgentTesla
Create hunting rule
File size:58'852 bytes
First seen:2024-01-25 02:03:30 UTC
Last seen:Never
File type:Word file doc
MIME type:text/plain
ssdeep 1536:ABp9ptbMxzdMDAk3OT8IU6KD8FamrFdBEwYeifsEhNzT:ABz+PBnYeifsEhl
TLSH T13843156AB70E4D65E765E677415D498E0AFCF73A72C140C0B9BCA3743B3D80E8A611B8
Reporter adm1n_usa32
Tags:AgentTesla CVE-2017-11882 doc rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
374
Origin country :
RO RO
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Factura.xls
Verdict:
Malicious activity
Analysis date:
2024-01-24 15:45:03 UTC
Tags:
maldoc phishing phishing-xls opendir
Link:
https://app.any.run/tasks/dd728612-32fa-4ff4-a6da-b6c038d4b338

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
Sanesecurity.Malware.27333.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-1.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.26244.RtfHeur.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.EvilRTF.CVE-2017-0199-Obfus.UNOFFICIAL
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file in the %AppData% directory
Sending a custom TCP request
Сreating synchronization primitives
Sending an HTTP GET request
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit masquerade packed shellcode
Link:
https://www.filescan.io/uploads/65b1c192fc0458d7ffd9c110/reports/91d41cc9-b593-4ebb-94c9-e82d12618c1c/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff
Result
Verdict:
MALICIOUS
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1380832
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Contains functionality to log keystrokes (.Net Source)
Document exploit detected (process start blacklist hit)
Found malware configuration
Initial sample is an obfuscated RTF file
Injects a PE file into a foreign processes
Installs a global keyboard hook
Installs new ROOT certificates
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1380832 Sample: microsoftdecentipdationinst... Startdate: 25/01/2024 Architecture: WINDOWS Score: 100 45 Initial sample is an obfuscated RTF file 2->45 47 Found malware configuration 2->47 49 Malicious sample detected (through community Yara rule) 2->49 51 16 other signatures 2->51 8 WINWORD.EXE 291 15 2->8         started        process3 file4 23 ~WRF{94A00395-5E29...0-DD5DD34A6857}.tmp, Composite 8->23 dropped 11 EQNEDT32.EXE 12 8->11         started        process5 dnsIp6 35 107.172.4.162, 49160, 80 AS-COLOCROSSINGUS United States 11->35 25 C:\Users\user\AppData\Roaming\conhost.exe, PE32 11->25 dropped 27 C:\Users\user\AppData\...\conhost[1].exe, PE32 11->27 dropped 61 Office equation editor establishes network connection 11->61 63 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->63 16 conhost.exe 1 7 11->16         started        file7 signatures8 process9 signatures10 37 Multi AV Scanner detection for dropped file 16->37 39 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 16->39 41 Machine Learning detection for dropped file 16->41 43 Injects a PE file into a foreign processes 16->43 19 conhost.exe 12 2 16->19         started        process11 dnsIp12 29 mail.telefoonreparatiebovenkarspel.nl 185.94.230.135, 49163, 49164, 587 ASTRALUSNL France 19->29 31 64.185.227.156, 443, 49162 WEBNXUS United States 19->31 33 2 other IPs or domains 19->33 53 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->53 55 Installs new ROOT certificates 19->55 57 Tries to steal Mail credentials (via file / registry access) 19->57 59 2 other signatures 19->59 signatures13
Score:
99%
Verdict:
Malware
File Type:
ASCII
Link:
https://malprob.io/report/ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-01-23 23:13:48 UTC
File Type:
Document
Extracted files:
4
AV detection:
21 of 38 (55.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=56cawd2ajkn7m2z4phajdufo2nyumiehmhqh6mxmg4lho6bum77q._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla collection keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240125-cg91laecgq/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Looks up external IP address via web service
Executes dropped EXE
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
Blocklisted process makes network request
Downloads MZ/PE file
AgentTesla
Malware family:
AgentTesla.v4
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ef840b0f404a/report/overview.html
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/ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff

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:INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.
Rule name:SUSP_INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:https://github.com/ditekshen/detection
Rule name:SUSP_RTF_Header_Anomaly_RID2F7F
Create hunting rule
Author:Florian Roth
Description:Detects malformed RTF header often used to trick mechanisms that check for a full RTF header
Reference:https://twitter.com/ItsReallyNick/status/975705759618158593

File information

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

Web download

AgentTesla

Word file doc ef840b0f404a9bf66b3c79c091d0aed37146208761e07f32ec371677783467ff

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2751245/
  
Delivery method
Distributed via web download

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