MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac. 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: 19


Intelligence 19 IOCs YARA 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac
SHA3-384 hash: 1736e34fdd02329ccfb4f1f1e0b22322f52b1f742849d680858be585ce54330fdec07c2f301bfce87a551670bc711d41
SHA1 hash: cd7768a3041a5eb291b7fa71e3d27d4f02c37689
MD5 hash: f02e5a3f40715c2a1ac521a85552c5f1
humanhash: fillet-hamper-mountain-alanine
File name:NEW MBLdraft.pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'242'624 bytes
First seen:2025-09-18 09:59:09 UTC
Last seen:2025-10-10 06:47:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 1895460fffad9475fda0c84755ecfee1 (341 x Formbook, 91 x AgentTesla, 56 x a310Logger)
ssdeep 24576:e5EmXFtKaL4/oFe5T9yyXYfP1ijXdaqcIby6UKjGqMbA:ePVt/LZeJbInQRaqcIbXUNP
TLSH T1DB45BF027391C062FFAB92734B56F6115BBC79260123E62F13981DB9BE701B1563E7A3
TrID 40.3% (.EXE) Win64 Executable (generic) (10522/11/4)
19.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
17.2% (.EXE) Win32 Executable (generic) (4504/4/1)
7.7% (.EXE) OS/2 Executable (generic) (2029/13)
7.6% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
122
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
NEW MBLdraft.pdf.exe
Verdict:
No threats detected
Analysis date:
2025-09-18 10:00:47 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/81720614-8dd1-4e90-a87c-704deb738ce6

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/28125/
Verdict:
Malicious
Score:
91.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68cbd80e88b954439247b34a
Tags:
underscore autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Launching a process
Sending a custom TCP request
Сreating synchronization primitives
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context autoit cmdkey compiled-script fingerprint fingerprint keylogger lolbin masquerade microsoft_visual_cc msiexec obfuscated packed packed packer_detected threat
Link:
https://www.filescan.io/uploads/68cbd81073287948292e9ea5/reports/5e31598e-88e3-4674-bac0-763ae395cb44/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-17T16:27:00Z UTC
Last seen:
2025-09-17T16:27:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/99be0588-bbc1-48fa-a1ef-61f1033fca46
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1779924
Signature
Binary is likely a compiled AutoIt script file
Found API chain indicative of sandbox detection
Initial sample is a PE file and has a suspicious name
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 submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Suspicious Double Extension File Execution
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses an obfuscated file name to hide its real file extension (double extension)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1779924 Sample: NEW MBLdraft.pdf.exe Startdate: 18/09/2025 Architecture: WINDOWS Score: 100 31 www.openpayday.xyz 2->31 33 www.mictra.site 2->33 35 3 other IPs or domains 2->35 43 Suricata IDS alerts for network traffic 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 Yara detected FormBook 2->47 51 6 other signatures 2->51 11 NEW MBLdraft.pdf.exe 4 2->11         started        signatures3 49 Performs DNS queries to domains with low reputation 31->49 process4 signatures5 61 Binary is likely a compiled AutoIt script file 11->61 63 Writes to foreign memory regions 11->63 65 Maps a DLL or memory area into another process 11->65 14 svchost.exe 11->14         started        process6 signatures7 67 Maps a DLL or memory area into another process 14->67 17 pXMhp4D2L0d.exe 14->17 injected process8 process9 19 systray.exe 13 17->19         started        signatures10 53 Tries to steal Mail credentials (via file / registry access) 19->53 55 Tries to harvest and steal browser information (history, passwords, etc) 19->55 57 Modifies the context of a thread in another process (thread injection) 19->57 59 3 other signatures 19->59 22 etbc4QZg.exe 19->22 injected 25 chrome.exe 19->25         started        27 firefox.exe 19->27         started        process11 dnsIp12 37 www.mictra.site 203.161.41.106, 49700, 49701, 49702 VNPT-AS-VNVNPTCorpVN Malaysia 22->37 39 www.anecdote.coach 15.197.172.60, 49691, 80 TANDEMUS United States 22->39 41 2 other IPs or domains 22->41 29 WerFault.exe 4 25->29         started        process13
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac
Verdict:
Malware
YARA:
7 match(es)
Tags:
AutoIt Decompiled Executable PDB Path PE (Portable Executable) PE File Layout Suspect Win 32 Exe x86
Link:
https://app.malva.re/file/f02e5a3f40715c2a1ac521a85552c5f1
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-09-17 21:42:59 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
29 of 38 (76.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tdwjfc76ooes2mx6fpncnde5kikp3qu4asqmsttwcuivnguuqswa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250918-l1dk6stxc1/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/96355da8-cb8b-4342-b42d-5831bc0c2fdd
Unpacked files
SH256 hash:
98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac
MD5 hash:
f02e5a3f40715c2a1ac521a85552c5f1
SHA1 hash:
cd7768a3041a5eb291b7fa71e3d27d4f02c37689
Link:
https://www.unpac.me/results/83920704-7525-421f-b9a8-6fb24072d812/
SH256 hash:
57225c31248a4d7dbb90d08161bb53fe02c9b5029ad2e146f5499cee05752238
MD5 hash:
3cbd723aa454dd583d7831680aada753
SHA1 hash:
a8b4ca243955b9f28c3e135e0d44a838fa33bc4a
Link:
https://www.unpac.me/results/83920704-7525-421f-b9a8-6fb24072d812/
SH256 hash:
f72a16478d9d85103103d1200a967b41129d0ccf72270b3164dce48ae0361d6e
MD5 hash:
171e56929849f011d764394b2c8bc923
SHA1 hash:
95900f840026e21a3db20ad95ec90161b6fa1983
Link:
https://www.unpac.me/results/83920704-7525-421f-b9a8-6fb24072d812/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/98ec928bfe73/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/98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:CP_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:TH_Generic_MassHunt_Win_Malware_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Generic Windows malware mass-hunt rule - 2025
Reference:https://cyfare.net/

File information

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

Malspam

Formbook

7z f2da7ad11806ef555cb7fed4afb4b89e6803239cbfe43f35e99d90fc4ef0597a

Formbook

Executable exe 98ec928bfe73892d32fe2bda268c9d5214fdc29c04a0c94e761511569a9484ac

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 f2da7ad11806ef555cb7fed4afb4b89e6803239cbfe43f35e99d90fc4ef0597a
Cape
Cape
https://www.capesandbox.com/analysis/28125/
  
Dropped by
MD5 bc1c6e171c788e4f7eb9f100ad42bee1

Comments