MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ca8cbf6d4259cd404477add5bcea6974eb9526eade7ee5560f78108d62f787d5. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ca8cbf6d4259cd404477add5bcea6974eb9526eade7ee5560f78108d62f787d5
SHA3-384 hash: d42961be1daec19802e87ec322a9d3c18aa3f894ef96230706a4148fffb7ded746bcbefd929a8b30948dc9074ed0099c
SHA1 hash: e86d3de53430a2a039c2c6db1dd4d2623d4f6ad0
MD5 hash: c998eab4dc1b884c6dba9eba84412a21
humanhash: alanine-ack-october-crazy
File name:c998eab4dc1b884c6dba9eba84412a21
Download: download sample
Signature AgentTesla
Create hunting rule
File size:49'685 bytes
First seen:2023-07-31 07:20:02 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:EwAbZSibMX9gRWcLzpgVCDDLudjVBQyMY9U:EwAlRvGUDDL6FV9U
TLSH T16123AE69C38F01A9CF5252379B571E4442FCBB7EB28552A1306C933533EEC2DA1266BD
Reporter zbetcheckin
Tags:AgentTesla CVE-2017-11882 rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
128
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
remittanceXcopy0731.docx
Verdict:
Malicious activity
Analysis date:
2023-07-31 06:38:44 UTC
Tags:
exploit cve-2017-11882 loader stealer agenttesla
Link:
https://app.any.run/tasks/eaf5f019-e7fb-47cc-a0bc-72ba6200febb

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Malware.29015.RtfHeur.Msg.UNOFFICIAL
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% directory
Сreating synchronization primitives
Searching for the window
Sending a custom TCP request
Searching for synchronization primitives
Launching a process
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/ca8cbf6d4259cd404477add5bcea6974eb9526eade7ee5560f78108d62f787d5/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit shellcode
Link:
https://www.filescan.io/uploads/64c760a6299c27f4c4f2858b/reports/4b7f9cee-2b51-4722-966d-965210f2aad3/overview
Verdict:
Malicious
Labled as:
CVE-2018-0802
Link:
https://www.hybrid-analysis.com/sample/ca8cbf6d4259cd404477add5bcea6974eb9526eade7ee5560f78108d62f787d5
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/1283023
Signature
.NET source code contains very large strings
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
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 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)
Sample uses string decryption to hide its real strings
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: 1283023 Sample: XNSpaSMYjl.rtf Startdate: 31/07/2023 Architecture: WINDOWS Score: 100 33 Multi AV Scanner detection for domain / URL 2->33 35 Found malware configuration 2->35 37 Malicious sample detected (through community Yara rule) 2->37 39 14 other signatures 2->39 7 EQNEDT32.EXE 11 2->7         started        12 WINWORD.EXE 291 18 2->12         started        process3 dnsIp4 31 85.208.139.242, 49182, 80 CMCSUS Germany 7->31 21 C:\Users\user\...\damianoasahgj578.exe, PE32 7->21 dropped 23 C:\Users\user\AppData\...\damianoszx[1].exe, PE32 7->23 dropped 47 Office equation editor establishes network connection 7->47 49 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->49 14 damianoasahgj578.exe 1 5 7->14         started        25 ~WRF{66724ADB-9929...C-9B934837700D}.tmp, Composite 12->25 dropped file5 signatures6 process7 signatures8 51 Multi AV Scanner detection for dropped file 14->51 53 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 14->53 55 May check the online IP address of the machine 14->55 57 2 other signatures 14->57 17 damianoasahgj578.exe 12 2 14->17         started        process9 dnsIp10 27 api4.ipify.org 173.231.16.76, 443, 49183 WEBNXUS United States 17->27 29 api.ipify.org 17->29 41 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 17->41 43 Tries to steal Mail credentials (via file / registry access) 17->43 45 Tries to harvest and steal browser information (history, passwords, etc) 17->45 signatures11
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ca8cbf6d4259cd404477add5bcea6974eb9526eade7ee5560f78108d62f787d5/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-07-31 07:21:03 UTC
File Type:
Document
Extracted files:
3
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zkgl63kclhguardxvxk3z2tjotvzkjxk3z7okvqppaii2yxxq7kq._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla collection keylogger spyware stealer trojan
Link:
https://tria.ge/reports/230731-h5425seb8z/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
outlook_office_path
outlook_win_path
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Drops file in System32 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
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ca8cbf6d4259/report/overview.html
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: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.

Web download

AgentTesla

Rich Text Format (RTF) rtf ca8cbf6d4259cd404477add5bcea6974eb9526eade7ee5560f78108d62f787d5

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2693414/

Comments


Avatar
zbet commented on 2023-07-31 07:20:05 UTC

url : hxxp://85.208.139.242/_errorpages/damianozx.doc