MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f3c2f3594817df1307afd458a0328ccff1e63683ef86a6d176ca41bda9e3a14f. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments
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SHA256 hash: f3c2f3594817df1307afd458a0328ccff1e63683ef86a6d176ca41bda9e3a14f
SHA3-384 hash: d0303d53e689f598e00f5c53a66b924e0b0bd7c51e9bda6f931bcbdc0e9c1cc876a3a69a85cbdd616a50cd9593b09248
SHA1 hash: 76e4236e69cd75dfce9e4df902a0e0c8216e2d4d
MD5 hash: 5244f3ad764530194749844302784188
humanhash: arizona-william-romeo-two
File name:5244f3ad764530194749844302784188.rtf
Download: download sample
Signature Formbook
Create hunting rule
File size:76'732 bytes
First seen:2023-08-17 18:11:40 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:1wAbZSibMX9gRWjZyzClu6ZpsTdwqUmbibmh:1wAlRqyzC3zDyiah
TLSH T19273CF68D34F01A9CF6253779A1B1A4441FDBB7EF28552A0306C533933EE83DA1262BD
Reporter abuse_ch
Tags:CVE-2017-11882 FormBook rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
102
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
5244f3ad764530194749844302784188.rtf
Verdict:
Malicious activity
Analysis date:
2023-08-17 18:13:19 UTC
Tags:
exploit cve-2017-11882 loader formbook xloader
Link:
https://app.any.run/tasks/7b783f2f-90e4-4cb1-ab95-4db30ad472db

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

TwinWave.EvilDoc.RoomService.20230808.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file in the %AppData% directory
Сreating synchronization primitives
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/f3c2f3594817df1307afd458a0328ccff1e63683ef86a6d176ca41bda9e3a14f/results/dashboard
Behaviour
BlacklistAPI detected
Gathering data
Verdict:
Malicious
Labled as:
CVE-2018-0802
Link:
https://www.hybrid-analysis.com/sample/f3c2f3594817df1307afd458a0328ccff1e63683ef86a6d176ca41bda9e3a14f
Result
Verdict:
MALICIOUS
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1292974
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
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 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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Uses netsh to modify the Windows network and firewall settings
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1292974 Sample: LeJAoaVG8C.rtf Startdate: 17/08/2023 Architecture: WINDOWS Score: 100 46 Snort IDS alert for network traffic 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for URL or domain 2->50 52 12 other signatures 2->52 10 EQNEDT32.EXE 11 2->10         started        15 WINWORD.EXE 336 13 2->15         started        17 EQNEDT32.EXE 2->17         started        process3 dnsIp4 44 2.59.254.18, 49164, 80 CMCSUS Germany 10->44 34 C:\Users\user\AppData\...\obiowyfj5783.exe, PE32 10->34 dropped 36 C:\Users\user\AppData\Local\...\obizx[1].exe, PE32 10->36 dropped 74 Office equation editor establishes network connection 10->74 76 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->76 19 obiowyfj5783.exe 1 7 10->19         started        file5 signatures6 process7 signatures8 54 Multi AV Scanner detection for dropped file 19->54 56 Machine Learning detection for dropped file 19->56 58 Tries to detect virtualization through RDTSC time measurements 19->58 60 Injects a PE file into a foreign processes 19->60 22 obiowyfj5783.exe 19->22         started        process9 signatures10 62 Modifies the context of a thread in another process (thread injection) 22->62 64 Maps a DLL or memory area into another process 22->64 66 Sample uses process hollowing technique 22->66 68 Queues an APC in another process (thread injection) 22->68 25 explorer.exe 1 3 22->25 injected process11 dnsIp12 38 elperegrinocabo.com 50.87.141.117, 49169, 80 UNIFIEDLAYER-AS-1US United States 25->38 40 www.gaoxiba150.com 43.228.76.51, 80 CHINANET-YUNNAN-IDC1CHINANETYunnanprovinceIDC1network China 25->40 42 13 other IPs or domains 25->42 70 System process connects to network (likely due to code injection or exploit) 25->70 72 Uses netsh to modify the Windows network and firewall settings 25->72 29 netsh.exe 25->29         started        signatures13 process14 signatures15 78 Modifies the context of a thread in another process (thread injection) 29->78 80 Maps a DLL or memory area into another process 29->80 82 Tries to detect virtualization through RDTSC time measurements 29->82 32 cmd.exe 29->32         started        process16
Detection:
cve-2017-11882-shellcode
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Link:
https://mwdb.cert.pl/sample/f3c2f3594817df1307afd458a0328ccff1e63683ef86a6d176ca41bda9e3a14f/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-08-16 18:15:04 UTC
File Type:
Document
Extracted files:
3
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6pbpgwkic7prgb5p2rmkamumz7y6mnud56dknulwzja33kpdufhq._file
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:oy30 rat spyware stealer trojan
Link:
https://tria.ge/reports/230817-ws7jdsdd4v/
Behaviour
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Drops file in Windows directory
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Formbook payload
Formbook
Malware family:
FormBook
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/f3c2f3594817/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/f3c2f3594817df1307afd458a0328ccff1e63683ef86a6d176ca41bda9e3a14f

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
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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

Formbook

Rich Text Format (RTF) rtf f3c2f3594817df1307afd458a0328ccff1e63683ef86a6d176ca41bda9e3a14f

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2695769/
  
Delivery method
Distributed via web download

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