MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5806ff817e0b0c3c57e727b04c77411487179c3676150f3f1cf536d3fac33fa5. 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: 6


Intelligence 6 IOCs YARA 5 File information Comments
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SHA256 hash: 5806ff817e0b0c3c57e727b04c77411487179c3676150f3f1cf536d3fac33fa5
SHA3-384 hash: 385611146dd5454f85911eabc3787ccbcaab43ad8244658d52e2c473785ed95730191462bb9276568d1a87f54d52b535
SHA1 hash: 71cc266a7f1ddd0b5b968e267cdf51776e0e7b55
MD5 hash: 7fbbd3038fcb18fba29a100ed36821ad
humanhash: ink-floor-jersey-pip
File name:7fbbd3038fcb18fba29a100ed36821ad.rtf
Download: download sample
Signature Formbook
Create hunting rule
File size:6'016 bytes
First seen:2020-11-05 15:08:19 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 96:2hQ5RGchjaxou5Tru/m6tOwtrnWFnYQuvQ6lDKIV3hlSc6TiMII1Ajwuw/APHEOY:2hK/hjadz6tOwJWevQ6lDV3hgLTiMNga
TLSH BCC13AA8CA166562EE18167EC30EFCAA066D723791EF09D030FC3E523F535375939905
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 :
1
# of downloads :
95
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-2.UNOFFICIAL
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TwinWave.EvilDoc.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
DNS request
Creating a file
Creating a file in the %temp% directory
Creating a file in the %AppData% subdirectories
Launching cmd.exe command interpreter
Launching a file downloaded from the Internet
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
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/521634
Signature
Drops PE files to the user root directory
Hijacks the control flow in another process
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)
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
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
Sigma detected: Suspicious Svchost Process
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 309931 Sample: hEtfBNCsR8.rtf Startdate: 05/11/2020 Architecture: WINDOWS Score: 100 61 Malicious sample detected (through community Yara rule) 2->61 63 Multi AV Scanner detection for dropped file 2->63 65 Multi AV Scanner detection for submitted file 2->65 67 11 other signatures 2->67 11 EQNEDT32.EXE 12 2->11         started        16 WINWORD.EXE 336 20 2->16         started        18 EQNEDT32.EXE 2->18         started        process3 dnsIp4 53 qdrenfa.com 91.203.193.242, 49165, 80 GARANT-PARK-INTERNETRU Russian Federation 11->53 49 C:\Users\user\AppData\Local\...\ban2[1].exe, PE32 11->49 dropped 51 C:\Users\Public\vbc.exe, PE32 11->51 dropped 91 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->91 20 vbc.exe 62 11->20         started        file5 signatures6 process7 file8 41 C:\Users\user\AppData\...\PuppetBedouin.dll, PE32 20->41 dropped 43 C:\Users\user\AppData\...\vdtflavuil.dll, PE32 20->43 dropped 45 C:\Users\user\AppData\...\spcustom.dll, PE32 20->45 dropped 47 9 other files (none is malicious) 20->47 dropped 75 Multi AV Scanner detection for dropped file 20->75 24 rundll32.exe 20->24         started        signatures9 process10 signatures11 77 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 24->77 79 Hijacks the control flow in another process 24->79 81 Maps a DLL or memory area into another process 24->81 27 cmd.exe 24->27         started        process12 signatures13 83 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 27->83 85 Modifies the context of a thread in another process (thread injection) 27->85 87 Maps a DLL or memory area into another process 27->87 89 3 other signatures 27->89 30 explorer.exe 27->30 injected process14 dnsIp15 55 www.onez-pv.com 156.227.139.109, 49166, 80 POWERLINE-AS-APPOWERLINEDATACENTERHK Seychelles 30->55 57 fbc7888164e64afca05b80bb89630439.pacloudflare.com 172.65.227.72, 49167, 80 CLOUDFLARENETUS United States 30->57 59 2 other IPs or domains 30->59 93 System process connects to network (likely due to code injection or exploit) 30->93 34 svchost.exe 30->34         started        37 autochk.exe 30->37         started        signatures16 process17 signatures18 69 Modifies the context of a thread in another process (thread injection) 34->69 71 Maps a DLL or memory area into another process 34->71 73 Tries to detect virtualization through RDTSC time measurements 34->73 39 cmd.exe 34->39         started        process19
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5806ff817e0b0c3c57e727b04c77411487179c3676150f3f1cf536d3fac33fa5/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-11-05 11:53:29 UTC
AV detection:
14 of 29 (48.28%)
Threat level:
  5/5
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/201105-ks62brkk9x/
Behaviour
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
NSIS installer
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.6644253.com/vdi/
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
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Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
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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 5806ff817e0b0c3c57e727b04c77411487179c3676150f3f1cf536d3fac33fa5

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/789538/
  
Delivery method
Distributed via web download

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