MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 3b581601796d4459571b4079419ea4e33065675c4dfb309877bace18fc8d1f63. 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
| SHA256 hash: | 3b581601796d4459571b4079419ea4e33065675c4dfb309877bace18fc8d1f63 |
|---|---|
| SHA3-384 hash: | 264e648eea798401eeda25f476da91220b2f5af9330b146bdb2ced1180c11277abb6443d4ee165b36abb5a38c3181ae8 |
| SHA1 hash: | 609fea5345fc11357c1d2dde6b33ac8db1d8b0f3 |
| MD5 hash: | 6c4a4577b05acbeb2d7daecf27658d03 |
| humanhash: | louisiana-victor-kentucky-black |
| File name: | 6c4a4577b05acbeb2d7daecf27658d03 |
| Download: | download sample |
| Signature | Formbook |
| File size: | 21'142 bytes |
| First seen: | 2021-10-29 18:51:52 UTC |
| Last seen: | Never |
| File type: |  rtf |
| MIME type: | text/rtf |
| ssdeep | 384:/8prEPKGGZujaDypqyg9e8GX9KN7JsJcohcIERHm/eyzqO7aQ/naiEec:/8prIKGGZujaDyAFtyJcohcIqm/1PN9w |
| TLSH | T18392DF7EF58B0A48DE56D6A8061A7BA5064DF51D72C440E23ABCDB387B5C8178B23D3C |
| Reporter |  zbetcheckin |
| Tags: | CVE-2017-11882 FormBook rtf |
Intelligence
File Origin
# of uploads :
1
# of downloads :
199
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
6c4a4577b05acbeb2d7daecf27658d03
Verdict:
Malicious activity
Analysis date:
2021-10-29 19:07:54 UTC
Tags:
opendir exploit CVE-2017-11882 loader trojan formbook stealer
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
Result
Verdict:
Malicious
File Type:
RTF File
Result
Verdict:
MALICIOUS
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
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
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: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Execution from Suspicious Folder
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Detection:
xloader
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Status:
Malicious
First seen:
2021-10-29 17:51:46 UTC
AV detection:
16 of 28 (57.14%)
Threat level:
5/5
Result
Malware family:
xloader
Score:
10/10
Tags:
family:xloader campaign:euzn loader rat
Behaviour
Checks processor information in registry
Enumerates system info in registry
Gathers network information
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
Loads dropped DLL
Uses the VBS compiler for execution
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.heser.net/euzn/
Malware family:
XLoader
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
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: | BitcoinAddress |
|---|---|
| Author: | Didier Stevens (@DidierStevens) |
| Description: | Contains a valid Bitcoin address |
| Rule name: | INDICATOR_RTF_MalVer_Objects |
|---|---|
| Author: | ditekSHen |
| Description: | Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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