MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f88b3a4c1151e84431fca680da8400ea6f1b801f01f919fd59b273bd02a535d3. 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


Threat unknown


Vendor detections: 7


Intelligence 7 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f88b3a4c1151e84431fca680da8400ea6f1b801f01f919fd59b273bd02a535d3
SHA3-384 hash: da47909da7568ccc000d322d3a049d68e6ea622c0c23bf751914b4e0975923c3382293a4777e3737ccb9a1022cb24cb2
SHA1 hash: db113888353fa2244c3c0e3cc835fa7921544bf2
MD5 hash: b09a15ec3039b2dbf82071b94f0d6c6d
humanhash: utah-hotel-winter-indigo
File name:b09a15ec3039b2dbf82071b94f0d6c6d.rtf
Download: download sample
File size:8'384 bytes
First seen:2020-12-08 16:21:18 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 192:zwhoMv9SIME4t/VODF+9xx8etT+RZQ7mFythn6doic0:zwhoMv9BMHtNm0+a+7imythnAH
TLSH F7026CE587A43A7E92A905E10C2A7DD04B2EB9520BD74BC1B6ECDA732787335D933811
Reporter abuse_ch
Tags:rtf

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE dump

Intelligence

File Origin
# of uploads :
1
# of downloads :
128
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

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
Creating a file
Launching the default Windows debugger (dwwin.exe)
Sending an HTTP GET request
Launching a file downloaded from the Internet
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/f88b3a4c1151e84431fca680da8400ea6f1b801f01f919fd59b273bd02a535d3/results/dashboard
Result
Verdict:
MALICIOUS
Result
Threat name:
Unknown
Detection:
malicious
Classification:
expl
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/558178
Signature
Antivirus detection for URL or domain
Drops PE files to the user root directory
Machine Learning 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)
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
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f88b3a4c1151e84431fca680da8400ea6f1b801f01f919fd59b273bd02a535d3/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-12-08 09:21:16 UTC
AV detection:
14 of 29 (48.28%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  9/10
Tags:
n/a
Link:
https://tria.ge/reports/201208-6f8faw57ls/
Behaviour
Launches Equation Editor
Modifies Internet Explorer settings
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
Drops file in Windows directory
Loads dropped DLL
Uses the VBS compiler for execution
Blocklisted process makes network request
Executes dropped EXE
ServiceHost packer
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Bloodhound
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/f88b3a4c1151e84431fca680da8400ea6f1b801f01f919fd59b273bd02a535d3

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

Rich Text Format (RTF) rtf f88b3a4c1151e84431fca680da8400ea6f1b801f01f919fd59b273bd02a535d3

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/898530/
  
Delivery method
Distributed via web download

Comments