MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fbad572e61544a5d6c132e233f6fedcff90d5426f874bb703de0922e53c5f2ea. 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: 10


Intelligence 10 IOCs YARA 6 File information Comments
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SHA256 hash: fbad572e61544a5d6c132e233f6fedcff90d5426f874bb703de0922e53c5f2ea
SHA3-384 hash: a252264739fd271e00423491c7fe9217e9f256b6485e6344cccecfc3c2bdabf2d82ce3014aa1da0707bf0c0e77347df5
SHA1 hash: 4322dd5d4c44ecaffdc31a761a7493fc045d074f
MD5 hash: c774c3df375b0d8ad7cb452595ce6df6
humanhash: august-ack-september-violet
File name:c774c3df375b0d8ad7cb452595ce6df6.rtf
Download: download sample
Signature Formbook
Create hunting rule
File size:14'333 bytes
First seen:2021-03-29 17:56:33 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:DQG8cEPdmpmSJUlkRERISV3ccYLgdYvoL+gEp2gzhf9I:N6lgCcyV3SAXEpzRO
TLSH BE527D90977E5832C74CA1A742AA364E596DF1F51A1360F0BC8DB0E13FB12231EBE5B4
Reporter abuse_ch
Tags:CVE-2017-11882 FormBook rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
171
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c774c3df375b0d8ad7cb452595ce6df6.rtf
Verdict:
Malicious activity
Analysis date:
2021-03-29 18:03:53 UTC
Tags:
exploit CVE-2017-11882 trojan formbook stealer
Link:
https://app.any.run/tasks/51c54eb8-7728-4c30-9d67-c6fb4df12f89

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/rtf
Has a screenshot:
False
Contains macros:
False
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
Launching cmd.exe command interpreter
Deleting a recently created file
DNS request
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
Creating a process from a recently created file
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/fbad572e61544a5d6c132e233f6fedcff90d5426f874bb703de0922e53c5f2ea/results/dashboard
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/657403
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Detected unpacking (changes PE section rights)
Drops PE files to the user root directory
Found malware configuration
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)
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 virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 377645 Sample: R6G6EFOeOE.rtf Startdate: 29/03/2021 Architecture: WINDOWS Score: 100 48 Found malware configuration 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Multi AV Scanner detection for dropped file 2->52 54 13 other signatures 2->54 10 EQNEDT32.EXE 12 2->10         started        15 WINWORD.EXE 291 23 2->15         started        process3 dnsIp4 38 198.23.251.121, 49165, 80 AS-COLOCROSSINGUS United States 10->38 32 C:\Users\user\AppData\Local\...\win[1].exe, PE32 10->32 dropped 34 C:\Users\Public\vbc.exe, PE32 10->34 dropped 72 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->72 17 vbc.exe 10->17         started        file5 signatures6 process7 signatures8 40 Multi AV Scanner detection for dropped file 17->40 42 Detected unpacking (changes PE section rights) 17->42 44 Machine Learning detection for dropped file 17->44 46 3 other signatures 17->46 20 vbc.exe 17->20         started        process9 signatures10 56 Modifies the context of a thread in another process (thread injection) 20->56 58 Maps a DLL or memory area into another process 20->58 60 Sample uses process hollowing technique 20->60 62 Queues an APC in another process (thread injection) 20->62 23 explorer.exe 20->23 injected process11 dnsIp12 36 www.elticrecruit.com 216.239.32.21, 49166, 80 GOOGLEUS United States 23->36 64 System process connects to network (likely due to code injection or exploit) 23->64 27 chkdsk.exe 23->27         started        signatures13 process14 signatures15 66 Modifies the context of a thread in another process (thread injection) 27->66 68 Maps a DLL or memory area into another process 27->68 70 Tries to detect virtualization through RDTSC time measurements 27->70 30 cmd.exe 27->30         started        process16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fbad572e61544a5d6c132e233f6fedcff90d5426f874bb703de0922e53c5f2ea/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-03-29 04:04:08 UTC
AV detection:
13 of 29 (44.83%)
Threat level:
  5/5
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader loader rat
Link:
https://tria.ge/reports/210329-ywe57vkw2n/
Behaviour
Checks processor information in registry
Enumerates system info in registry
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
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
Blocklisted process makes network request
Executes dropped EXE
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.scott-re.online/nnmd/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fbad572e61544a5d6c132e233f6fedcff90d5426f874bb703de0922e53c5f2ea

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:INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.
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 fbad572e61544a5d6c132e233f6fedcff90d5426f874bb703de0922e53c5f2ea

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1098624/
  
Delivery method
Distributed via web download

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