MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72. 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: 17


Intelligence 17 IOCs YARA 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72
SHA3-384 hash: 430e9ea0eb760f258aa9e4a0c5361fe13367757b6f160d08f28888d8da97f83d99a9efcd8e286f3a08fc1efcd49355d1
SHA1 hash: ed4886d86b8ad96a0a252190705d70e0fac9289b
MD5 hash: 6b9167056af49bf702c833ae4f581ef1
humanhash: apart-robin-juliet-arkansas
File name:6b9167056af49bf702c833ae4f581ef1
Download: download sample
Signature Formbook
Create hunting rule
File size:574'773 bytes
First seen:2024-06-25 13:05:18 UTC
Last seen:2024-06-25 14:23:40 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 6144:dwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAuB+2:dB
TLSH T16EC4D12DD34B02598F620377AB571E5142BDBB7EF38552A1302C537933EAC39A1252BE
Reporter zbetcheckin
Tags:CVE-2017-11882 FormBook rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
93
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3f9c2a2bac5e829fd61db15ffda44387442cd91f7d84bb3d8e28b19c9ac098b0.doc
Verdict:
Malicious activity
Analysis date:
2024-06-25 10:39:59 UTC
Tags:
cve-2017-0199 exploit
Link:
https://app.any.run/tasks/ebe46065-eec9-4b01-b36a-fa64b370aa62

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

SecuriteInfo.com.Exploit.CVE-2018-0798.4.4552.11175.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

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

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=667ac0f55fec1bb84f85cc2bwin10vpnfull_triage
Tags:
Exploit Generic Network Office Static
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Using the Windows Management Instrumentation requests
Creating a window
Connection attempt to an infection source by exploiting the app vulnerability
Creating a file in the %AppData% directory
Сreating synchronization primitives
Creating a file
Launching cmd.exe command interpreter
Launching a service
Setting browser functions hooks
Query of malicious DNS domain
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
Forced shutdown of a system process
Sending a TCP request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Unauthorized injection to a system process
Unauthorized injection to a browser process
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/667ac0c449a1c83062686944/reports/37f29d31-7282-44ec-a8a3-3b9ee5d7b919/overview
Verdict:
Malicious
Labled as:
CVE-2018-0798
Link:
https://www.hybrid-analysis.com/sample/13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72
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/1462402
Signature
.NET source code references suspicious native API functions
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Document exploit detected (process start blacklist hit)
Drops PE files with a suspicious file extension
Found direct / indirect Syscall (likely to bypass EDR)
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)
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 establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Equation Editor Network Connection
Sigma detected: Suspicious Microsoft Office Child Process
Snort IDS alert for network traffic
Switches to a custom stack to bypass stack traces
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: 1462402 Sample: eiqj38BeRo.rtf Startdate: 25/06/2024 Architecture: WINDOWS Score: 100 47 Snort IDS alert for network traffic 2->47 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 14 other signatures 2->53 11 WINWORD.EXE 291 22 2->11         started        process3 process4 13 EQNEDT32.EXE 11 11->13         started        18 EQNEDT32.EXE 11->18         started        dnsIp5 45 universalmovies.top 104.21.74.191, 443, 49162 CLOUDFLARENETUS United States 13->45 35 C:\Users\user\AppData\Roaming\nelb82019.scr, PE32 13->35 dropped 37 C:\Users\user\AppData\Local\...\nelb[1].scr, PE32 13->37 dropped 83 Office equation editor establishes network connection 13->83 85 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 13->85 20 nelb82019.scr 1 7 13->20         started        file6 signatures7 process8 signatures9 55 Multi AV Scanner detection for dropped file 20->55 57 Machine Learning detection for dropped file 20->57 59 Tries to detect virtualization through RDTSC time measurements 20->59 61 2 other signatures 20->61 23 nelb82019.scr 20->23         started        process10 signatures11 63 Modifies the context of a thread in another process (thread injection) 23->63 65 Maps a DLL or memory area into another process 23->65 67 Sample uses process hollowing technique 23->67 69 2 other signatures 23->69 26 explorer.exe 1 3 23->26 injected process12 dnsIp13 39 www.home-repair-contractors-kfm.xyz 26->39 41 www.videomademagic.com 26->41 43 19 other IPs or domains 26->43 71 System process connects to network (likely due to code injection or exploit) 26->71 73 Performs DNS queries to domains with low reputation 26->73 30 wlanext.exe 26->30         started        signatures14 process15 signatures16 75 Modifies the context of a thread in another process (thread injection) 30->75 77 Maps a DLL or memory area into another process 30->77 79 Tries to detect virtualization through RDTSC time measurements 30->79 81 2 other signatures 30->81 33 cmd.exe 30->33         started        process17
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-06-25 09:16:49 UTC
File Type:
Document
Extracted files:
3
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=co6jjixttib7kcidn72yiyvzotcadswa35jmzyrcemiu7ee3f5za._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:btrd rat spyware stealer trojan
Link:
https://tria.ge/reports/240625-qb3k8avbkp/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Formbook payload
Formbook
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/aad9d726-f749-470e-bc56-8696178bbe32
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/13bc94a2f39a/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/13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72

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_EXPLOIT_CVE_2017_11882_4
Create hunting rule
Author:ditekSHen
Description:detects RTF variant documents potentially exploiting CVE-2018-0802 or CVE-2017-11882
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: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 13bc94a2f39a03f509036ff58462b974c401cac0df52cce22223114f909b2f72

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2905755/

Comments


Avatar
zbet commented on 2024-06-25 13:05:19 UTC

url : hxxps://universalmovies.top/nelb.doc