MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88. 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: 16


Intelligence 16 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
SHA3-384 hash: 9f6241172c14892c0c3f84a063448631a5c8eddf6b05f5441c1f17a1dd20cc98c8c0b84858c7ed6e0d794e1681e4ed1b
SHA1 hash: d9012c547137e1c643b436a25feab998a3a49c52
MD5 hash: ceca2dff2ddf27ee53ad866b23535b48
humanhash: sodium-august-grey-wolfram
File name:noua comanda pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:669'696 bytes
First seen:2025-04-19 08:20:07 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 12288:cbN0Q5CmNR4Un7Z+51quHB2qCJtu9L0hX:W0aeU7SHBOJc9Ih
Threatray 3 similar samples on MalwareBazaar
TLSH T147E4E00E67E94A40E9FE5FB491B910A50771FA17EA22F36E15D020FA8E72713DC12763
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
dhash icon 70f8eee0d8cc69b2 (8 x SnakeKeylogger, 5 x Formbook, 5 x DarkTortilla)
Reporter Anonymous
Tags:agent.tesla dropper exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
510
Origin country :
RO RO
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
nouacomandapdf.exe
Verdict:
Malicious activity
Analysis date:
2025-04-19 08:25:07 UTC
Tags:
auto-startup formbook stealer xloader
Link:
https://app.any.run/tasks/2fa29c85-3786-4bd9-8c8a-e50c1927a3e6

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/2976/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.3274.10357.13943.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68035cce2203b3e10cd19495
Tags:
underscore autorun
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
Running batch commands
Launching a process
Creating a file
Creating a process from a recently created file
Moving of the original file
Unauthorized injection to a recently created process
Unauthorized injection to a system process
Enabling autorun
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
formbook obfuscated obfuscated vbnet
Link:
https://www.filescan.io/uploads/68035cce90767142c3db94c3/reports/6b23c866-5b77-4a07-aa9f-6c3089af8fc4/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/25c04590-1d1c-4543-8d9e-6cb2e6f52c69
Result
Threat name:
DarkTortilla, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1669095
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates an undocumented autostart registry key
Drops PE files to the startup folder
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
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)
Moves itself to temp directory
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses cmd line tools excessively to alter registry or file data
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected DarkTortilla Crypter
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1669095 Sample: noua comanda pdf.exe Startdate: 19/04/2025 Architecture: WINDOWS Score: 100 73 www.juniper.fit 2->73 75 www.furkanenes.live 2->75 77 Found malware configuration 2->77 79 Malicious sample detected (through community Yara rule) 2->79 81 Antivirus detection for URL or domain 2->81 83 11 other signatures 2->83 14 noua comanda pdf.exe 4 2->14         started        18 rundll32.exe 2->18         started        signatures3 process4 file5 69 C:\Users\user\...\noua comanda pdf.exe.log, ASCII 14->69 dropped 125 Moves itself to temp directory 14->125 127 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->127 20 skype.exe 4 14->20         started        23 cmd.exe 1 14->23         started        signatures6 process7 signatures8 85 Hides that the sample has been downloaded from the Internet (zone.identifier) 20->85 25 cmd.exe 3 20->25         started        29 cmd.exe 1 20->29         started        87 Uses ping.exe to sleep 23->87 89 Uses cmd line tools excessively to alter registry or file data 23->89 91 Drops PE files to the startup folder 23->91 93 Uses ping.exe to check the status of other devices and networks 23->93 31 reg.exe 1 1 23->31         started        33 PING.EXE 1 23->33         started        36 conhost.exe 23->36         started        process9 dnsIp10 65 C:\Users\user\AppData\Roaming\...\skype.exe, PE32 25->65 dropped 67 C:\Users\user\...\skype.exe:Zone.Identifier, ASCII 25->67 dropped 111 Uses ping.exe to sleep 25->111 38 skype.exe 2 25->38         started        41 conhost.exe 25->41         started        43 PING.EXE 1 25->43         started        45 PING.EXE 1 25->45         started        113 Uses cmd line tools excessively to alter registry or file data 29->113 47 conhost.exe 29->47         started        49 reg.exe 1 29->49         started        51 PING.EXE 1 29->51         started        115 Creates an undocumented autostart registry key 31->115 71 127.0.0.1 unknown unknown 33->71 file11 signatures12 process13 signatures14 103 Writes to foreign memory regions 38->103 105 Allocates memory in foreign processes 38->105 107 Hides that the sample has been downloaded from the Internet (zone.identifier) 38->107 109 Injects a PE file into a foreign processes 38->109 53 AddInProcess32.exe 38->53         started        process15 signatures16 95 Modifies the context of a thread in another process (thread injection) 53->95 97 Maps a DLL or memory area into another process 53->97 99 Sample uses process hollowing technique 53->99 101 4 other signatures 53->101 56 explorer.exe 16 53->56 injected process17 process18 58 mstsc.exe 56->58         started        signatures19 117 Modifies the context of a thread in another process (thread injection) 58->117 119 Maps a DLL or memory area into another process 58->119 121 Tries to detect virtualization through RDTSC time measurements 58->121 123 Switches to a custom stack to bypass stack traces 58->123 61 cmd.exe 58->61         started        process20 process21 63 conhost.exe 61->63         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2025-03-17 13:56:20 UTC
File Type:
PE (.Net Exe)
Extracted files:
30
AV detection:
29 of 36 (80.56%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6m4y42qxdiw4ghaxdaj2xjflvhu5qgjbuzivd6gbnvr57dtdrsea._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
94cabb62a68074520220fe485bf718bb4ff66b76ff39037542845d2f143e35ce
Formbook
error
Formbook
f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
Formbook
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:kmge discovery persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/250419-j8np1azzes/
Behaviour
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Drops startup file
Executes dropped EXE
Formbook payload
Formbook
Formbook family
Modifies WinLogon for persistence
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/a8bc1e17-dc93-4b69-9ae7-081a9936a24a
Unpacked files
SH256 hash:
f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
MD5 hash:
ceca2dff2ddf27ee53ad866b23535b48
SHA1 hash:
d9012c547137e1c643b436a25feab998a3a49c52
Link:
https://www.unpac.me/results/ce192136-a3dd-4786-8ece-06fae2d24120/
SH256 hash:
ea9e39ecd964dff50e81679ec710efcfc9ce8bed9dcaa0ae7c0db8cf77035d41
MD5 hash:
925b9057a89902738da08ce657e02f20
SHA1 hash:
fc3ec8abc9f3d328f0d86513783e857bc43b3d70
Link:
https://www.unpac.me/results/ce192136-a3dd-4786-8ece-06fae2d24120/
SH256 hash:
e5f86b8396486279e575c0c94bf3b86dc1e6e2baa2797ddbabebcb4bba206eb2
MD5 hash:
31e078cc207339b9e27b8aa9b2d76abe
SHA1 hash:
d1039dfae9a48d127c6f8258f24aff5bcafe2b75
Detections:
win_formbook_w0
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/ce192136-a3dd-4786-8ece-06fae2d24120/
Parent samples :
f206c3a093c6174558ea0646b12e262d8549bee2255418d8968d3e0bb7218330
4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a
400c68fe1ed1125e94941f896b04a4e7716cd23ce7501fb9f61dd1aa2a067d4c
f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
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/f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
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.

Malspam

Formbook

Executable exe f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88

(this sample)

  
Link
https://www.virustotal.com/gui/file/f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/2976/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

Comments