MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 15655af972b632964f3327334c8809fb6cd6cd04e43f4548a32a5bb5743a75bc. 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


Formbook


Vendor detections: 7


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

SHA256 hash: 15655af972b632964f3327334c8809fb6cd6cd04e43f4548a32a5bb5743a75bc
SHA3-384 hash: f5a56e9dfa86552e5e3701214dec523646cca0253552f5b9b6f5c36a80f120a86e39d6a72ea02e3b19c6b1da04dd2f29
SHA1 hash: 9673703628a2edf4fea0b3a764357f82b4c9ce9f
MD5 hash: b115f24fcecce5e8661300527a748448
humanhash: princess-hot-orange-timing
File name:b115f24fcecce5e8661300527a748448.rtf
Download: download sample
Signature Formbook
Create hunting rule
File size:10'024 bytes
First seen:2020-11-20 18:37:18 UTC
Last seen:2020-11-23 09:16:54 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 192:txo49xa9Dj4BAQBR6qz0EW1qTGBGuJZzugM2U3Ucvm1Af++ldIbZ:txoX9DsBAQBR1zaqT0GumxQcuaW+ldK
TLSH EA227D3426543969F6AF016F8EB57CD20709B893ABE266C137DCD6E337160346FE5808
Reporter abuse_ch
Tags:CVE-2017-11882 FormBook 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 :
2
# of downloads :
400
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
Creating a file
Launching cmd.exe command interpreter
Deleting a system file
Sending an HTTP GET request
Launching a file downloaded from the Internet
Creating a process from a recently created file
Unauthorized injection to a system process
Result
Verdict:
MALICIOUS
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/544407
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Drops PE files to the user root directory
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
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
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 321301 Sample: fqwBU8MyzT.rtf Startdate: 20/11/2020 Architecture: WINDOWS Score: 100 41 www.opalthemovie.com 2->41 57 Malicious sample detected (through community Yara rule) 2->57 59 Antivirus / Scanner detection for submitted sample 2->59 61 Multi AV Scanner detection for dropped file 2->61 63 14 other signatures 2->63 11 EQNEDT32.EXE 12 2->11         started        16 WINWORD.EXE 336 20 2->16         started        18 EQNEDT32.EXE 2->18         started        signatures3 process4 dnsIp5 43 103.207.38.170, 49165, 80 VNPT-AS-VNVNPTCorpVN Viet Nam 11->43 37 C:\Users\user\AppData\Local\...\pp[1].exe, PE32 11->37 dropped 39 C:\Users\Public\vbc.exe, PE32 11->39 dropped 83 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->83 20 vbc.exe 11->20         started        file6 signatures7 process8 signatures9 65 Multi AV Scanner detection for dropped file 20->65 67 Machine Learning detection for dropped file 20->67 69 Writes to foreign memory regions 20->69 71 2 other signatures 20->71 23 RegSvcs.exe 20->23         started        26 RegSvcs.exe 20->26         started        process10 signatures11 73 Modifies the context of a thread in another process (thread injection) 23->73 75 Maps a DLL or memory area into another process 23->75 77 Sample uses process hollowing technique 23->77 79 Queues an APC in another process (thread injection) 23->79 28 explorer.exe 23->28 injected 81 Tries to detect virtualization through RDTSC time measurements 26->81 process12 dnsIp13 45 auctionpros.club 162.0.232.118, 49166, 80 NAMECHEAP-NETUS Canada 28->45 47 www.sgbanfang.com 146.148.194.209, 49167, 80 HENGTONG-IDC-LLCUS United States 28->47 49 www.auctionpros.club 28->49 85 System process connects to network (likely due to code injection or exploit) 28->85 32 wlanext.exe 28->32         started        signatures14 process15 signatures16 51 Modifies the context of a thread in another process (thread injection) 32->51 53 Maps a DLL or memory area into another process 32->53 55 Tries to detect virtualization through RDTSC time measurements 32->55 35 cmd.exe 32->35         started        process17
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/15655af972b632964f3327334c8809fb6cd6cd04e43f4548a32a5bb5743a75bc/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-11-19 16:22:55 UTC
AV detection:
15 of 28 (53.57%)
Threat level:
  5/5
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/201120-tfcp5pwja6/
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
Loads dropped DLL
Uses the VBS compiler for execution
Blacklisted process makes network request
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.digitalcashteam.com/glt/
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/15655af972b632964f3327334c8809fb6cd6cd04e43f4548a32a5bb5743a75bc

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

Formbook

Rich Text Format (RTF) rtf 15655af972b632964f3327334c8809fb6cd6cd04e43f4548a32a5bb5743a75bc

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/836543/
  
Delivery method
Distributed via web download

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