MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4358b898c41852211ee727e4b8c0d05301bf4c6a90a4780c5a6f8b1b1cf5c81. 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: 11


Intelligence 11 IOCs YARA 7 File information Comments
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SHA256 hash: a4358b898c41852211ee727e4b8c0d05301bf4c6a90a4780c5a6f8b1b1cf5c81
SHA3-384 hash: 57cee061212617058cc8ecf64a946e0fec2b07905748c0a676c1f2edc87f763c17b057d6daaa19a722b549e4c9ab7d47
SHA1 hash: d252c054154c5524dfbf3f3238b32f711290fd36
MD5 hash: 40f03856876fda8b3bda880d1d5a4636
humanhash: wolfram-eighteen-louisiana-michigan
File name:dot.dot
Download: download sample
Signature Formbook
Create hunting rule
File size:12'899 bytes
First seen:2021-04-08 08:11:18 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:CrbzX8txvSYHKdnddR6DJlNmBjL0ztbQ3om:uH8bKdlkJlNmBjatO
TLSH 6242AFF4DCBCFDFDBB09425B8D1E31301DB6287592960A24BA9E5022BF971B48B150AC
Reporter TeamDreier
Tags:CVE-2017-11882 FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
113
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DHL Shipping doc & Shipment tracking details.docx
Verdict:
Malicious activity
Analysis date:
2021-04-08 08:07:37 UTC
Tags:
generated-doc exploit CVE-2017-11882 trojan formbook stealer
Link:
https://app.any.run/tasks/03de1618-82d1-45a9-9bc3-1cae1723e2c7

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
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MiscreantPunch.RTF.2017-0199.Obfus.171711.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
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/a4358b898c41852211ee727e4b8c0d05301bf4c6a90a4780c5a6f8b1b1cf5c81/results/dashboard
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/a4358b898c41852211ee727e4b8c0d05301bf4c6a90a4780c5a6f8b1b1cf5c81
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/670018
Signature
Antivirus detection for URL or domain
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: File Dropped By EQNEDT32EXE
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 dnsIp2 2 Behavior Graph ID: 383958 Sample: dot.dot Startdate: 08/04/2021 Architecture: WINDOWS Score: 100 41 www.hcr.services 2->41 51 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->51 53 Found malware configuration 2->53 55 Malicious sample detected (through community Yara rule) 2->55 57 10 other signatures 2->57 11 EQNEDT32.EXE 12 2->11         started        16 WINWORD.EXE 336 22 2->16         started        18 EQNEDT32.EXE 2->18         started        signatures3 process4 dnsIp5 49 23.95.122.24, 49167, 80 AS-COLOCROSSINGUS United States 11->49 35 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 11->35 dropped 37 C:\Users\Public\vbc.exe, PE32 11->37 dropped 77 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->77 20 vbc.exe 11->20         started        39 C:\Users\user\Desktop\~$dot.dot, data 16->39 dropped file6 signatures7 process8 signatures9 59 Multi AV Scanner detection for dropped file 20->59 61 Detected unpacking (changes PE section rights) 20->61 63 Machine Learning detection for dropped file 20->63 65 3 other signatures 20->65 23 vbc.exe 20->23         started        process10 signatures11 67 Modifies the context of a thread in another process (thread injection) 23->67 69 Maps a DLL or memory area into another process 23->69 71 Sample uses process hollowing technique 23->71 73 Queues an APC in another process (thread injection) 23->73 26 explorer.exe 23->26 injected process12 dnsIp13 43 www.likehowto.com 203.76.236.103, 49168, 80 HENGTONG-IDC-LLCUS Hong Kong 26->43 45 k9cdna.51w4.com 45.142.156.44, 49169, 80 CNSERVERSUS United Kingdom 26->45 47 5 other IPs or domains 26->47 75 System process connects to network (likely due to code injection or exploit) 26->75 30 NAPSTAT.EXE 26->30         started        signatures14 process15 signatures16 79 Modifies the context of a thread in another process (thread injection) 30->79 81 Maps a DLL or memory area into another process 30->81 83 Tries to detect virtualization through RDTSC time measurements 30->83 33 cmd.exe 30->33         started        process17
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a4358b898c41852211ee727e4b8c0d05301bf4c6a90a4780c5a6f8b1b1cf5c81/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-04-08 05:52:02 UTC
AV detection:
16 of 48 (33.33%)
Threat level:
  5/5
Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:xloader loader rat
Link:
https://tria.ge/reports/210408-j4xdkgfkxa/
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: GetForegroundWindowSpam
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/a4358b898c41852211ee727e4b8c0d05301bf4c6a90a4780c5a6f8b1b1cf5c81

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:INDICATOR_RTF_EXPLOIT_CVE_2017_11882_4
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Author:ditekSHen
Description:detects RTF variant documents potentially exploiting CVE-2018-0802 or CVE-2017-11882
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:IPPort_combo_mem
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Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
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Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
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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 a4358b898c41852211ee727e4b8c0d05301bf4c6a90a4780c5a6f8b1b1cf5c81

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1104281/
  
Delivery method
Distributed via web download

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