MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 deee3ad263c3947b20580cce3310c53219217e21588479e7152eda86b9f6f08e. 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: deee3ad263c3947b20580cce3310c53219217e21588479e7152eda86b9f6f08e
SHA3-384 hash: 671348b284dc9ff98e4087b06e52470093780f0b6d574422884ae5354547e2a1b5cf7ef3b650d5baa6aa2f873fe9d742
SHA1 hash: ee25e695a575cbc5e8f74d535f44e66e9b579e7c
MD5 hash: 7d9ea5cd30a82700f597bd84ff334255
humanhash: nebraska-jupiter-charlie-green
File name:7d9ea5cd30a82700f597bd84ff334255.rtf
Download: download sample
Signature Formbook
Create hunting rule
File size:7'725 bytes
First seen:2020-11-05 15:10:10 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 192:bAjZmkxragXycSS/rMbgCeka8kIq5n6/A60sdhwgD:bA1N5nCch/DCf5znAVsdhD
TLSH CEF19D868F187C12EB6A08A38D54B96C497CF43B64E72656319CFFD36F370218B2082D
Reporter abuse_ch
Tags: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 :
92
Origin country :
n/a
Vendor Threat Intelligence
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
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
Unauthorized injection to a system process
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
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/521654
Signature
Antivirus / Scanner detection for submitted sample
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 domain / URL
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
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: 309948 Sample: yo0PRvEkB3.rtf Startdate: 05/11/2020 Architecture: WINDOWS Score: 100 54 www.vedreo.com 2->54 56 vedreo.com 2->56 66 Multi AV Scanner detection for domain / URL 2->66 68 Malicious sample detected (through community Yara rule) 2->68 70 Antivirus / Scanner detection for submitted sample 2->70 72 12 other signatures 2->72 12 EQNEDT32.EXE 12 2->12         started        17 WINWORD.EXE 291 23 2->17         started        signatures3 process4 dnsIp5 58 qdrenfa.com 91.203.193.242, 49165, 80 GARANT-PARK-INTERNETRU Russian Federation 12->58 50 C:\Users\user\AppData\Local\...\ban1[1].exe, PE32 12->50 dropped 52 C:\Users\Public\vbc.exe, PE32 12->52 dropped 98 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 12->98 19 vbc.exe 62 12->19         started        file6 signatures7 process8 file9 42 C:\Users\user\AppData\...\PuppetBedouin.dll, PE32 19->42 dropped 44 C:\Users\user\AppData\...\vdtflavuil.dll, PE32 19->44 dropped 46 C:\Users\user\AppData\...\spcustom.dll, PE32 19->46 dropped 48 9 other files (none is malicious) 19->48 dropped 80 Multi AV Scanner detection for dropped file 19->80 23 rundll32.exe 19->23         started        signatures10 process11 signatures12 82 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 23->82 84 Hijacks the control flow in another process 23->84 86 Maps a DLL or memory area into another process 23->86 26 cmd.exe 23->26         started        29 cmd.exe 23->29         started        process13 signatures14 88 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 26->88 90 Modifies the context of a thread in another process (thread injection) 26->90 92 Maps a DLL or memory area into another process 26->92 96 2 other signatures 26->96 31 explorer.exe 26->31 injected 94 Tries to detect virtualization through RDTSC time measurements 29->94 process15 dnsIp16 60 www.accumulationzone.com 31->60 62 parkingpage.namecheap.com 198.54.117.216, 49166, 80 NAMECHEAP-NETUS United States 31->62 64 System process connects to network (likely due to code injection or exploit) 31->64 35 explorer.exe 31->35         started        38 autochk.exe 31->38         started        signatures17 process18 signatures19 74 Modifies the context of a thread in another process (thread injection) 35->74 76 Maps a DLL or memory area into another process 35->76 78 Tries to detect virtualization through RDTSC time measurements 35->78 40 cmd.exe 35->40         started        process20
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/deee3ad263c3947b20580cce3310c53219217e21588479e7152eda86b9f6f08e/
Threat name:
Win32.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-11-04 12:26:02 UTC
AV detection:
13 of 29 (44.83%)
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/201105-ab69cnyqln/
Behaviour
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
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
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
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 deee3ad263c3947b20580cce3310c53219217e21588479e7152eda86b9f6f08e

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/789536/
  
Delivery method
Distributed via web download

Comments