MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef13ad897a51175cd6ab4b266a5792214853f595036156c766ba43a3a76537d7. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef13ad897a51175cd6ab4b266a5792214853f595036156c766ba43a3a76537d7
SHA3-384 hash: 4dc35b26e2fb6c208cdb5cc71a97d45f81593574b366b3b9cb04a052e81e0191bbdddc0ed1c844ae282fa61316a3455b
SHA1 hash: f07dfb8f1e0882c89e3450eab97acbd877c68b5e
MD5 hash: 1aed13cd0bfee26e7686cd0fa7145b27
humanhash: red-north-mexico-california
File name:JUSTIFICANTE.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'296'384 bytes
First seen:2021-12-13 16:42:26 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:YSwMBcM7SNuP/CBiTP+voc+5Gnnvr9G76mk5Nqm1aQh/7ddbMSk+f:MEcMFPrTYop8nvQ7lUIm1agsSk+f
TLSH T18E552346BBBCEA02C4385376C067BA450774ED2070A1EB4B7CD9BAD955B23E11A053EF
File icon (PE):PE icon
dhash icon fcd8d0d2dac0c0e4 (44 x Formbook, 1 x AgentTesla, 1 x XWorm)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
156
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
JUSTIFICANTE.exe
Verdict:
Malicious activity
Analysis date:
2021-12-13 16:52:48 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/f93d31ba-fc33-439a-b617-66f444085d3a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/213613/
Detection(s):
PUA.Win.Packer.Medvedev-6482674-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
DNS request
Launching a process
Creating a process with a hidden window
Unauthorized injection to a recently created process
Creating a file
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61b778194b267126def1c66e/reports/d3dd1eae-13f4-45e3-b69e-b474ef6fd8c4/overview
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/821df870-a56a-4b92-a53a-ec001376334a
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/906510
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Powershell Defender Exclusion
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 AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 538987 Sample: JUSTIFICANTE.exe Startdate: 13/12/2021 Architecture: WINDOWS Score: 100 37 www.dommecertificationcourse.com 2->37 39 dommecertificationcourse.com 2->39 47 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->47 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 9 other signatures 2->53 11 JUSTIFICANTE.exe 4 2->11         started        signatures3 process4 file5 35 C:\Users\user\...\JUSTIFICANTE.exe.log, ASCII 11->35 dropped 67 Adds a directory exclusion to Windows Defender 11->67 69 Tries to detect virtualization through RDTSC time measurements 11->69 71 Injects a PE file into a foreign processes 11->71 15 JUSTIFICANTE.exe 11->15         started        18 powershell.exe 25 11->18         started        signatures6 process7 signatures8 73 Modifies the context of a thread in another process (thread injection) 15->73 75 Maps a DLL or memory area into another process 15->75 77 Sample uses process hollowing technique 15->77 79 Queues an APC in another process (thread injection) 15->79 20 explorer.exe 15->20 injected 24 conhost.exe 18->24         started        process9 dnsIp10 41 www.zimobogrev.site 162.250.122.195, 49822, 80 IS-AS-1US United States 20->41 43 www.ultracareobgyn.com 20->43 45 ultracareobgyn.com 34.102.136.180, 49819, 49825, 80 GOOGLEUS United States 20->45 55 System process connects to network (likely due to code injection or exploit) 20->55 57 Uses netstat to query active network connections and open ports 20->57 26 NETSTAT.EXE 20->26         started        29 autochk.exe 20->29         started        signatures11 process12 signatures13 59 Self deletion via cmd delete 26->59 61 Modifies the context of a thread in another process (thread injection) 26->61 63 Maps a DLL or memory area into another process 26->63 65 Tries to detect virtualization through RDTSC time measurements 26->65 31 cmd.exe 1 26->31         started        process14 process15 33 conhost.exe 31->33         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef13ad897a51175cd6ab4b266a5792214853f595036156c766ba43a3a76537d7/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-12-13 16:43:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
30
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=54j23cl2kelvzvvljmtguv4sefefh5mvanqvnr3gxjb2hj3fg7lq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:n3p2 rat spyware stealer trojan
Link:
https://tria.ge/reports/211213-t78nwsdhc4/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.etaiiler.com/n3p2/
Unpacked files
SH256 hash:
18f485bc48f60303ef69863e39872d39cfaa39b0e10afa44d27e7a1eac6bd6c6
MD5 hash:
c2f0c18dbdb32cb2ca664d2f8b70dbf1
SHA1 hash:
e11099f00b66edf201dd4ddb53a9894e6b071abb
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/7f5948eb-6618-413a-be81-3f59375dc4ca/
Parent samples :
ba2972170824e9bb06c18fce3fcfa5d52411163bc1ecdc55e7fe94fac3ba96ad
ef13ad897a51175cd6ab4b266a5792214853f595036156c766ba43a3a76537d7
SH256 hash:
f8ee3ec61da05401295cfc650a604dc644a16a8d7afc9f090cd9f7a0d9300317
MD5 hash:
7e9f1e09d0aa634d949c26737c26ff3c
SHA1 hash:
cb6b35efc98d0656148907ce56268a964556664d
Link:
https://www.unpac.me/results/7f5948eb-6618-413a-be81-3f59375dc4ca/
SH256 hash:
9a78f969c5a46c86687cb6180156b9b8246d0e17e18de50b793a838572124fe3
MD5 hash:
41a9eedff0fd9e73781455f6bd1855f6
SHA1 hash:
7a84deb025ce337a96252bc585ce38d3bd6e1080
Link:
https://www.unpac.me/results/7f5948eb-6618-413a-be81-3f59375dc4ca/
SH256 hash:
ef13ad897a51175cd6ab4b266a5792214853f595036156c766ba43a3a76537d7
MD5 hash:
1aed13cd0bfee26e7686cd0fa7145b27
SHA1 hash:
f07dfb8f1e0882c89e3450eab97acbd877c68b5e
Link:
https://www.unpac.me/results/7f5948eb-6618-413a-be81-3f59375dc4ca/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ef13ad897a51/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/ef13ad897a51175cd6ab4b266a5792214853f595036156c766ba43a3a76537d7

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:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/213613/

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