MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0233c43ce1cf759e1d8c8d343b03bfbad84652b12fe32b0e54b7fc7c08bdcc88. 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
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SHA256 hash: 0233c43ce1cf759e1d8c8d343b03bfbad84652b12fe32b0e54b7fc7c08bdcc88
SHA3-384 hash: 1956d66935035f75b03a4755c04d3b00bcef69124a8956a676efbca9a0622101653aba459437d22483b9ba5994109030
SHA1 hash: a2190789d601f874f7f35e63331e1b9e39b6459a
MD5 hash: a46b1c33dbf43642e984ec274b3d02a0
humanhash: aspen-beryllium-mountain-montana
File name:a46b1c33dbf43642e984ec274b3d02a0.rtf
Download: download sample
Signature AgentTesla
Create hunting rule
File size:8'445 bytes
First seen:2020-11-03 17:25:54 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 192:z4C/gXWCf1LLbTm6kqVHiyW8eZOFqHLUOWMCR+Do:z4C/kf13bTDkqliyNKjE
TLSH 4C028F74298EAF5DEF3175C1C01691758416393EE76DB8B4B88C8AA32F37258C7C144D
Reporter abuse_ch
Tags:AgentTesla CVE-2017-11882 rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
102
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

MiscreantPunch.RTF.2017-0199.Obfus.170830.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.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
Creating a file in the %AppData% subdirectories
Moving a file to the %temp% directory
Sending an HTTP GET request
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
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
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/519651
Signature
Antivirus detection for URL or domain
Contains functionality to detect sleep reduction / modifications
Detected unpacking (changes PE section rights)
Detected unpacking (creates a PE file in dynamic memory)
Detected unpacking (overwrites its own PE header)
Drops PE files to the user root directory
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Maps a DLL or memory area into another process
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
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)
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 308926 Sample: q0JZk0N4Ch.rtf Startdate: 04/11/2020 Architecture: WINDOWS Score: 100 46 Found malware configuration 2->46 48 Antivirus detection for URL or domain 2->48 50 Multi AV Scanner detection for dropped file 2->50 52 11 other signatures 2->52 7 EQNEDT32.EXE 12 2->7         started        12 YYtJku.exe 1 2->12         started        14 WINWORD.EXE 291 23 2->14         started        process3 dnsIp4 36 78.128.92.94, 49167, 80 BELCLOUDBG Bulgaria 7->36 30 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 7->30 dropped 32 C:\Users\Public\vbc.exe, PE32 7->32 dropped 62 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->62 16 vbc.exe 1 7->16         started        64 Multi AV Scanner detection for dropped file 12->64 66 Detected unpacking (changes PE section rights) 12->66 68 Detected unpacking (overwrites its own PE header) 12->68 70 5 other signatures 12->70 19 YYtJku.exe 2 12->19         started        file5 signatures6 process7 signatures8 38 Multi AV Scanner detection for dropped file 16->38 40 Detected unpacking (changes PE section rights) 16->40 42 Detected unpacking (creates a PE file in dynamic memory) 16->42 44 6 other signatures 16->44 21 vbc.exe 1 6 16->21         started        26 splwow64.exe 16->26         started        process9 dnsIp10 34 us2.smtp.mailhostbox.com 208.91.199.223, 49168, 587 PUBLIC-DOMAIN-REGISTRYUS United States 21->34 28 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 21->28 dropped 54 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 21->54 56 Tries to steal Mail credentials (via file access) 21->56 58 Tries to harvest and steal ftp login credentials 21->58 60 2 other signatures 21->60 file11 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0233c43ce1cf759e1d8c8d343b03bfbad84652b12fe32b0e54b7fc7c08bdcc88/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-11-03 06:52:36 UTC
AV detection:
14 of 29 (48.28%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=aiz4iphbz52z4hmmru2dwa57xlmemuvrf7rswdsuw76hycf5zsea._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger persistence spyware stealer trojan upx
Link:
https://tria.ge/reports/201103-xmyhtg7cmx/
Behaviour
Launches Equation Editor
Modifies Internet Explorer settings
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
Drops file in Windows directory
Suspicious use of SetThreadContext
Adds Run key to start application
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
UPX packed file
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 0233c43ce1cf759e1d8c8d343b03bfbad84652b12fe32b0e54b7fc7c08bdcc88

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/783004/
  
Delivery method
Distributed via web download

Comments