MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1a447aa45f410300aab375552ac1ff4425388d9c9959051da7013cd8d3ae004b. 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


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1a447aa45f410300aab375552ac1ff4425388d9c9959051da7013cd8d3ae004b
SHA3-384 hash: 40024e953a1c7e97d04475139b3a780d0b16d4e747f8040fd99a299c4b54ecebc7a44ce450c7c26957876684dc83200c
SHA1 hash: 13f4d98b367eeab9711f0b537db18b2e4405fe1d
MD5 hash: 67511a896419975ff78f55ae03e9ffef
humanhash: nitrogen-jersey-steak-lactose
File name:RFQ SECO WARWICK Germany.doc
Download: download sample
Signature Formbook
Create hunting rule
File size:321'128 bytes
First seen:2021-02-03 07:18:20 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 6144:D76LYrUVjkXdCfWd5ppJI8L4s5kSFxNPnfokdH9jGIWmiKduNNZJRfFsv5f:bBCfWdtJf3/dYkdH9qKd8DsRf
TLSH B864BFF871047DE6766F426BDE96ADDD13B6266399CB98CC80A47BC305A3375FE02804
Reporter abuse_ch
Tags:doc FormBook


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: 520.nvbo.ga
Sending IP: 178.62.201.113
From: Lukasz Wozniak (Procurement) <farfetch@email.farfetch.com>
Subject: RE; FW: Approved RFQ for project 'SECO / WARWICK Germany'
Attachment: RFQ SECO WARWICK Germany.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
107
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ SECO WARWICK Germany.doc
Verdict:
Malicious activity
Analysis date:
2021-02-03 07:47:28 UTC
Tags:
trojan exploit CVE-2017-11882 loader formbook stealer
Link:
https://app.any.run/tasks/f905944e-0d5e-4b85-a7e9-6d27dde9642b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
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 in the %AppData% directory
Launching cmd.exe command interpreter
Deleting a recently created file
Launching a file downloaded from the Internet
Unauthorized injection to a recently created process by context flags manipulation
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:
Fake RTF File
Link:
https://app.docguard.net/1a447aa45f410300aab375552ac1ff4425388d9c9959051da7013cd8d3ae004b/results/dashboard
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/597572
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
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 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: 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
Uses netstat to query active network connections and open ports
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 347832 Sample: RFQ SECO WARWICK Germany.doc Startdate: 03/02/2021 Architecture: WINDOWS Score: 100 52 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->52 54 Multi AV Scanner detection for domain / URL 2->54 56 Found malware configuration 2->56 58 15 other signatures 2->58 10 EQNEDT32.EXE 11 2->10         started        15 WINWORD.EXE 291 21 2->15         started        process3 dnsIp4 42 tunedinblog.com 150.95.81.183, 49165, 80 GMO-Z-COM-THGMO-ZcomNetDesignHoldingsCoLtdSG Singapore 10->42 32 C:\Users\user\AppData\Roaming\boby58644.exe, PE32 10->32 dropped 34 C:\Users\user\AppData\Local\...\bobbyx[1].exe, PE32 10->34 dropped 76 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->76 17 boby58644.exe 10->17         started        file5 signatures6 process7 signatures8 44 Multi AV Scanner detection for dropped file 17->44 46 Machine Learning detection for dropped file 17->46 48 Tries to detect virtualization through RDTSC time measurements 17->48 50 Injects a PE file into a foreign processes 17->50 20 boby58644.exe 17->20         started        process9 signatures10 60 Modifies the context of a thread in another process (thread injection) 20->60 62 Maps a DLL or memory area into another process 20->62 64 Sample uses process hollowing technique 20->64 66 Queues an APC in another process (thread injection) 20->66 23 explorer.exe 20->23 injected process11 dnsIp12 36 groups3usa.com 34.102.136.180, 49167, 80 GOOGLEUS United States 23->36 38 www.abearabull.com 173.236.190.98, 49168, 80 DREAMHOST-ASUS United States 23->38 40 2 other IPs or domains 23->40 68 System process connects to network (likely due to code injection or exploit) 23->68 27 NETSTAT.EXE 23->27         started        signatures13 process14 signatures15 70 Modifies the context of a thread in another process (thread injection) 27->70 72 Maps a DLL or memory area into another process 27->72 74 Tries to detect virtualization through RDTSC time measurements 27->74 30 cmd.exe 27->30         started        process16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1a447aa45f410300aab375552ac1ff4425388d9c9959051da7013cd8d3ae004b/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-02-03 03:04:27 UTC
AV detection:
18 of 45 (40.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=djchvjc7iebqbkvtovksvqp7iqstrdm4tfmqkhnhae6nru5oabfq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210203-rjbs7nw6a2/
Behaviour
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
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
Blocklisted process makes network request
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.1983lawyers.com/dtn/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.96
Link:
https://yomi.yoroi.company/submissions/1a447aa45f410300aab375552ac1ff4425388d9c9959051da7013cd8d3ae004b

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.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Word file doc 1a447aa45f410300aab375552ac1ff4425388d9c9959051da7013cd8d3ae004b

(this sample)

  
Delivery method
Distributed via e-mail attachment

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