MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2912e56548bc7ceb19333ab9b07f015959df1ae193ca27444079b92d9136c65b. 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: 2912e56548bc7ceb19333ab9b07f015959df1ae193ca27444079b92d9136c65b
SHA3-384 hash: ced2689a23e943b74947e8538c9099402625d8b18587ec3190c434737a83403819fcc57bbbb644788162ed1df2600ecc
SHA1 hash: 074d07f9f6632358aead0e1ae8f448f79f4db38b
MD5 hash: 88a907c3e36d9ddfb106c9ad66408b46
humanhash: table-emma-five-nebraska
File name:88a907c3e36d9ddfb106c9ad66408b46
Download: download sample
Signature Formbook
Create hunting rule
File size:23'789 bytes
First seen:2023-04-29 06:58:07 UTC
Last seen:2023-04-29 09:26:52 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:WUuC7tpbyAJmJDTnk6pNZHI8ESTCeV6hKizYvmGsNR9heE/e2gw44q00CrxoGYhC:xfQTnk0leICrhKizYHsNXHF4uNrxoGcC
TLSH T156B204565B8C4C51E26AE8BB835EE00E19BCF23630C215C4BD9DE3747B6D10E0B6B5B8
Reporter zbetcheckin
Tags:CVE-2017-11882 FormBook rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
116
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
88a907c3e36d9ddfb106c9ad66408b46
Verdict:
Malicious activity
Analysis date:
2023-04-29 06:58:41 UTC
Tags:
opendir exploit cve-2017-11882 loader formbook xloader
Link:
https://app.any.run/tasks/e7c8794d-63f4-46e1-b941-e5114100509f

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.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
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file
Сreating synchronization primitives
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
File Type:
RTF File
Link:
https://app.docguard.net/2912e56548bc7ceb19333ab9b07f015959df1ae193ca27444079b92d9136c65b/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit packed shellcode
Link:
https://www.filescan.io/uploads/644cc036961a21dc785be6d5/reports/5dcad5c4-d6df-4814-bebf-eaf79aefc3d3/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/2912e56548bc7ceb19333ab9b07f015959df1ae193ca27444079b92d9136c65b
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/1223370
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
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 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 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
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: 856322 Sample: y4qbRd7teh.rtf Startdate: 29/04/2023 Architecture: WINDOWS Score: 100 46 Multi AV Scanner detection for domain / URL 2->46 48 Found malware configuration 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 15 other signatures 2->52 10 EQNEDT32.EXE 12 2->10         started        15 WINWORD.EXE 336 18 2->15         started        17 EQNEDT32.EXE 2->17         started        process3 dnsIp4 44 192.3.179.147, 49171, 80 AS-COLOCROSSINGUS United States 10->44 34 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 10->34 dropped 36 C:\Users\Public\vbc.exe, PE32 10->36 dropped 72 Office equation editor establishes network connection 10->72 74 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->74 19 vbc.exe 1 5 10->19         started        file5 signatures6 process7 signatures8 54 Multi AV Scanner detection for dropped file 19->54 56 Machine Learning detection for dropped file 19->56 58 Tries to detect virtualization through RDTSC time measurements 19->58 60 Injects a PE file into a foreign processes 19->60 22 vbc.exe 19->22         started        process9 signatures10 62 Modifies the context of a thread in another process (thread injection) 22->62 64 Maps a DLL or memory area into another process 22->64 66 Sample uses process hollowing technique 22->66 68 Queues an APC in another process (thread injection) 22->68 25 explorer.exe 2 22->25 injected process11 dnsIp12 38 dxyzcmag2020.com 192.185.34.69, 49172, 80 UNIFIEDLAYER-AS-1US United States 25->38 40 hatchandneststudio.com 76.223.105.230, 49173, 80 AMAZON-02US United States 25->40 42 3 other IPs or domains 25->42 70 System process connects to network (likely due to code injection or exploit) 25->70 29 wlanext.exe 25->29         started        signatures13 process14 signatures15 76 Modifies the context of a thread in another process (thread injection) 29->76 78 Maps a DLL or memory area into another process 29->78 80 Tries to detect virtualization through RDTSC time measurements 29->80 32 cmd.exe 29->32         started        process16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2912e56548bc7ceb19333ab9b07f015959df1ae193ca27444079b92d9136c65b/
Threat name:
Win32.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-04-17 14:25:08 UTC
File Type:
Document
Extracted files:
4
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fejokzkixr6owgjthk43a7yblfm56gxbspfcorcapg4s3ejwyznq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ne28 rat spyware stealer trojan
Link:
https://tria.ge/reports/230429-hr21macb4w/
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
Uses the VBS compiler for execution
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/2912e56548bc7ceb19333ab9b07f015959df1ae193ca27444079b92d9136c65b

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 2912e56548bc7ceb19333ab9b07f015959df1ae193ca27444079b92d9136c65b

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2620580/

Comments


Avatar
zbet commented on 2023-04-29 06:58:13 UTC

url : hxxp://172.245.191.46/w/%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23.doc