MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21. 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 2 File information Comments
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SHA256 hash: 8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21
SHA3-384 hash: 2963f908d66220e70ee40263719c79aad3edb6b0e320777036e41fa363b16429c2f5b6a07f94a0243af384129f68c3cf
SHA1 hash: a0928412605e3689cdd5d2341e3feade0d14863a
MD5 hash: 0c689bc4f98f87cf5e715ef4ce8fa369
humanhash: nitrogen-venus-purple-cup
File name:Invoice.doc
Download: download sample
Signature AgentTesla
Create hunting rule
File size:150'834 bytes
First seen:2024-04-24 04:39:40 UTC
Last seen:2024-04-24 05:28:36 UTC
File type:Word file doc
MIME type:text/rtf
ssdeep 1536:pmwAlRkwAlRkwAlRF3IQ/6YrQ5JNEF5+i2O:cwAlawAlawAlH3IW6YrQ5JNEF5+i2O
TLSH T139E3BE6DC34F02598F621376AB171E5042BDBA6EF38452B1306C537933EAC3DA1252BE
Reporter abuse_ch
Tags:AgentTesla CVE-2017-11882 doc

Intelligence

File Origin
# of uploads :
2
# of downloads :
384
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21.doc
Verdict:
Suspicious activity
Analysis date:
2024-04-24 06:12:41 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/bbbdde06-2266-4c79-b770-296353255754

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Using the Windows Management Instrumentation requests
Creating a window
Connection attempt to an infection source by exploiting the app vulnerability
Creating a file in the %AppData% directory
Сreating synchronization primitives
Changing an executable file
Creating a file
Launching a service
Reading critical registry keys
DNS request
Connection attempt
Query of malicious DNS domain
Launching a file downloaded from the Internet
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Stealing user critical data
Sending a TCP request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Labled as:
CVE-2018-0798
Link:
https://www.hybrid-analysis.com/sample/8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21
Gathering data
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/1430739
Signature
.NET source code references suspicious native API functions
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)
Drops PE files with a suspicious file extension
Found malware configuration
Injects a PE file into a foreign processes
Installs new ROOT certificates
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
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)
Sigma detected: Equation Editor Network Connection
Sigma detected: Suspicious Microsoft Office Child Process
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 / registry access)
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1430739 Sample: Invoice.doc Startdate: 24/04/2024 Architecture: WINDOWS Score: 100 37 Multi AV Scanner detection for domain / URL 2->37 39 Found malware configuration 2->39 41 Malicious sample detected (through community Yara rule) 2->41 43 15 other signatures 2->43 8 WINWORD.EXE 336 13 2->8         started        process3 process4 10 EQNEDT32.EXE 11 8->10         started        15 EQNEDT32.EXE 8->15         started        dnsIp5 27 dukeenergyltd.top 172.67.134.136, 443, 49161 CLOUDFLARENETUS United States 10->27 23 C:\Users\user\AppData\Roaming\pros67924.scr, PE32 10->23 dropped 25 C:\Users\user\AppData\Local\...\pros[1].scr, PE32 10->25 dropped 53 Installs new ROOT certificates 10->53 55 Office equation editor establishes network connection 10->55 57 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->57 17 pros67924.scr 2 10->17         started        file6 signatures7 process8 signatures9 29 Antivirus detection for dropped file 17->29 31 Multi AV Scanner detection for dropped file 17->31 33 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 17->33 35 2 other signatures 17->35 20 pros67924.scr 2 17->20         started        process10 signatures11 45 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 20->45 47 Tries to steal Mail credentials (via file / registry access) 20->47 49 Tries to harvest and steal ftp login credentials 20->49 51 Tries to harvest and steal browser information (history, passwords, etc) 20->51
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-04-24 02:13:21 UTC
File Type:
Document
Extracted files:
3
AV detection:
16 of 38 (42.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=r6mrufuqaxh5354c47rhb6w6z5rwldpqdvqiemegypiyh2j6z4qq._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240424-fajfvafa47/
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
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Suspicious use of SetThreadContext
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Executes dropped EXE
Loads dropped DLL
Reads WinSCP keys stored on the system
Blocklisted process makes network request
Downloads MZ/PE file
AgentTesla
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/8f991a169005/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.20
Link:
https://yomi.yoroi.company/submissions/8f991a169005cfddf782e7e270fadecf63658df01d60823086c3d183e93ecf21

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

File information

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

Comments