MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 75baa768f4672768efde37f7eaecf62590d1f1ae0ec29d322c7c5c4d8d97a42b. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 75baa768f4672768efde37f7eaecf62590d1f1ae0ec29d322c7c5c4d8d97a42b
SHA3-384 hash: 9ed78e0eb624220db5fe02e1d7c1c2e6ce03a7eda0442893992140fc7c295b639fc87a89d3db173e72d14be34f0ded9a
SHA1 hash: 5c65d2f1415e0ee342efcb00cd754453b508f6d9
MD5 hash: b7317b332d56b95754a97d72aab04605
humanhash: tennis-ceiling-louisiana-steak
File name:b7317b332d56b95754a97d72aab04605
Download: download sample
Signature Formbook
Create hunting rule
File size:26'371 bytes
First seen:2023-06-02 05:01:57 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:69aBSaHdSCPrrQGQ4fuqY3082xWd8xlUG2mBND78FgEPrVRjU:LBSESG342uB3N2xWqxl32KK/ZR4
TLSH T169C204565B8C4C61F25AE87B865EA00E19FCF63630C255C4BD9CE2B43B3D50E0B6B1B8
Reporter zbetcheckin
Tags:CVE-2017-11882 FormBook rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
135
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
b7317b332d56b95754a97d72aab04605
Verdict:
Malicious activity
Analysis date:
2023-06-02 05:02:36 UTC
Tags:
opendir exploit cve-2017-11882 loader formbook xloader trojan stealer
Link:
https://app.any.run/tasks/a5da187d-978f-427f-b451-32cb273d9d75

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Malware.29030.RtfHeur.UNOFFICIAL
Create hunting rule

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

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file
Сreating synchronization primitives
Launching cmd.exe command interpreter
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
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/75baa768f4672768efde37f7eaecf62590d1f1ae0ec29d322c7c5c4d8d97a42b/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit fingerprint lolbin shellcode stealer stealer
Link:
https://www.filescan.io/uploads/647977cbe794f9b5b39e249f/reports/6f574b22-0dcb-4210-8c34-eaf31f8ea80b/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/75baa768f4672768efde37f7eaecf62590d1f1ae0ec29d322c7c5c4d8d97a42b
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/1247380
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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)
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 880400 Sample: wpmKcJf5XF.rtf Startdate: 02/06/2023 Architecture: WINDOWS Score: 100 50 Snort IDS alert for network traffic 2->50 52 Found malware configuration 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 17 other signatures 2->56 10 EQNEDT32.EXE 12 2->10         started        15 WINWORD.EXE 291 18 2->15         started        process3 dnsIp4 40 45.66.230.127, 49181, 80 CMCSUS Germany 10->40 32 C:\Users\user\AppData\...\INTERNET[1].exe, PE32 10->32 dropped 34 C:\Users\Public\internet.exe, PE32 10->34 dropped 74 Office equation editor establishes network connection 10->74 76 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->76 17 internet.exe 1 7 10->17         started        36 ~WRF{C63BEBD8-DB56...7-006E85D39E84}.tmp, Composite 15->36 dropped file5 signatures6 process7 signatures8 42 Antivirus detection for dropped file 17->42 44 Multi AV Scanner detection for dropped file 17->44 46 Machine Learning detection for dropped file 17->46 48 2 other signatures 17->48 20 internet.exe 17->20         started        process9 signatures10 58 Modifies the context of a thread in another process (thread injection) 20->58 60 Maps a DLL or memory area into another process 20->60 62 Sample uses process hollowing technique 20->62 64 Queues an APC in another process (thread injection) 20->64 23 explorer.exe 6 20->23 injected process11 dnsIp12 38 www.aidapes.ru 194.58.112.173, 49182, 80 AS-REGRU Russian Federation 23->38 66 System process connects to network (likely due to code injection or exploit) 23->66 27 colorcpl.exe 23->27         started        signatures13 process14 signatures15 68 Modifies the context of a thread in another process (thread injection) 27->68 70 Maps a DLL or memory area into another process 27->70 72 Tries to detect virtualization through RDTSC time measurements 27->72 30 cmd.exe 27->30         started        process16
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/75baa768f4672768efde37f7eaecf62590d1f1ae0ec29d322c7c5c4d8d97a42b/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-05-29 14:19:07 UTC
File Type:
Document
Extracted files:
4
AV detection:
16 of 37 (43.24%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ow5ko2hum4twr366g736v3hwewind4nob3bj2mrmproe3dmxuqvq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:hs95 rat spyware stealer trojan
Link:
https://tria.ge/reports/230602-fn4nyahh48/
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: GetForegroundWindowSpam
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
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/75baa768f4672768efde37f7eaecf62590d1f1ae0ec29d322c7c5c4d8d97a42b

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_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 75baa768f4672768efde37f7eaecf62590d1f1ae0ec29d322c7c5c4d8d97a42b

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2649734/

Comments


Avatar
zbet commented on 2023-06-02 05:01:58 UTC

url : hxxp://45.66.230.127/io/ioioioioioioioioioioio%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23ioioioioioio.doc