MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32. 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: 18


Intelligence 18 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32
SHA3-384 hash: 49f0f9224726397df28941afac5ac78b38f618b516809be42845c3b8bd254349d8321e50ca492f558bcbb3928fb57dd4
SHA1 hash: 8711fe03bebdced03cae417e4dadaa17a04d0637
MD5 hash: 2733564f41cedfc2d3e3f743a4358b23
humanhash: indigo-march-florida-spring
File name:ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5
Download: download sample
Signature Formbook
Create hunting rule
File size:1'196'032 bytes
First seen:2025-12-08 14:54:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 0f7552f9514e3a32a8dc8a5a9d9c89a7 (12 x Formbook, 2 x SnakeKeylogger, 1 x a310Logger)
ssdeep 24576:Itb20pkaCqT5TBWgNjVY9Nltd02gQXCe6H16A:RVg5tjVY9bH02we6V5
Threatray 2'735 similar samples on MalwareBazaar
TLSH T13D45CF1263DEC360C7B25273BA55B701AEBF782506B1F96B2FD4093DE920122525EB73
TrID 50.4% (.EXE) Win32 EXE Yoda's Crypter (26569/9/4)
19.9% (.EXE) Win64 Executable (generic) (10522/11/4)
9.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.5% (.EXE) Win32 Executable (generic) (4504/4/1)
3.8% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
Reporter abuse_ch
Tags:exe FormBook upx-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5
File size (compressed) :710'656 bytes
File size (de-compressed) :1'196'032 bytes
Format:win32/pe
Packed file: ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5

Intelligence

File Origin
# of uploads :
1
# of downloads :
67
Origin country :
NL NL
Vendor Threat Intelligence
Malware configuration found for:
AutoIt
Details
AutoIt
extracted scripts and files
Link:
https://research.acce.ciphertechsolutions.com/results/ccbf2206-f043-4f43-b272-28f5f3bce7dd/
Malware family:
n/a
ID:
1
File name:
ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5
Verdict:
No threats detected
Analysis date:
2025-12-08 18:43:10 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/639e5d95-b108-4be4-97ee-134ec0dfc612

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/43235/
Detection(s):
Win.Trojan.Autoit-10037269-0
Create hunting rule

SecuriteInfo.com.PSW.Agent.BORA.UNOFFICIAL
Create hunting rule

PUA.Win.Packer.Embedpe-3
Create hunting rule

PUA.Win.Packer.AcprotectUltraprotect-1
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6936e71d881313558a2b88db
Tags:
nymeria autoit emotet
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug autoit compiled-script fingerprint installer-heuristic keylogger microsoft_visual_cc nymeria packed
Link:
https://www.filescan.io/uploads/6936e6efff25e40750d7a699/reports/75f116cf-ea0e-4b85-80c9-94e537d46f74/overview
Verdict:
Malicious
Labled as:
AIT:Trojan.Nymeria
Link:
https://www.hybrid-analysis.com/sample/43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-08T13:10:00Z UTC
Last seen:
2025-12-08T20:46:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/dbfe3874-bc2e-4b1b-aa7e-20635f4cb401
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1828866
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
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)
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)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1828866 Sample: ffb76bb8ba846f99098bcd8cd26... Startdate: 08/12/2025 Architecture: WINDOWS Score: 100 31 www.amendplus.xyz 2->31 33 www.zkoraclecloud.xyz 2->33 35 14 other IPs or domains 2->35 43 Suricata IDS alerts for network traffic 2->43 45 Antivirus detection for URL or domain 2->45 47 Antivirus / Scanner detection for submitted sample 2->47 51 4 other signatures 2->51 11 ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5.exe 4 2->11         started        signatures3 49 Performs DNS queries to domains with low reputation 33->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 67 Switches to a custom stack to bypass stack traces 11->67 14 svchost.exe 11->14         started        process6 signatures7 69 Maps a DLL or memory area into another process 14->69 71 Unusual module load detection (module proxying) 14->71 17 ZcYSyiApIZHil.exe 14->17 injected process8 process9 19 SecEdit.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 4 other signatures 19->59 22 AlaD5BG4.exe 19->22 injected 25 chrome.exe 19->25         started        27 firefox.exe 19->27         started        process11 dnsIp12 37 www.wpolityce.pl 104.20.42.12, 49727, 49728, 49729 CLOUDFLARENETUS United States 22->37 39 www.iibhbet.com 172.67.138.218, 49731, 49732, 49733 CLOUDFLARENETUS United States 22->39 41 9 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/43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32
Verdict:
Malware
YARA:
7 match(es)
Tags:
AutoIt Decompiled Executable PE (Portable Executable) PE File Layout Suspect Win 32 Exe x86
Link:
https://app.malva.re/file/2733564f41cedfc2d3e3f743a4358b23
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-12-08 14:55:41 UTC
File Type:
PE (Exe)
Extracted files:
24
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=io2scw3clheruudyhyege4sfzd5e256jaaymhmcdyjxezzq7xiza._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
autoit
Create hunting rule
Similar samples:
170c2b10322d1b2bbd5403091730544828633e2bdf59af1134b1ae1898a8d90c
Formbook
4139421ed55c3e312d485d67869250d329a4f2e50407e0fcddd74ee419abf216
Formbook
41eaa4d9ca00fdef1f8ac2b02ffbb0498b8ed8565916247c20b4a41beaa102a8
Formbook
59c9153a4675a740e9e17934e288c5be876f37334c1ce79427c40e7e13e5cb6a
Formbook
5a13dd5d13e094fa6d10b545dd72855d21143c478ebb5bb589f7334767cd4d34
Formbook
867dc4d48c2fbef423c67cf481e33703e7e6a9494a400078298494777b23b18d
Formbook
90b33d8252b9470d19ac4aff278e6470c04bafe0a04cf143b61880257ca13157
Formbook
a21182bf32d320deebafbf52f06c370fe3762ec55793e09df10ce9e27bfe799a
Formbook
cc3ca5fb64666cfb1860c997333b0cc43f10fcc71a4a4840e47815fd659b907d
Formbook
e890b563d8866db21a60bd0eed524503a8769125f31949836da4c67ab1a704d9
Formbook
error
Formbook
+ 2'725 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/251208-sasezadl7t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
AutoIT Executable
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
Win.Trojan.Autoit-10037269-0
YARA:
n/a
Link:
https://app.threat.zone/submission/204612c3-bb00-4ab0-be26-b4ed17059fa2
Unpacked files
SH256 hash:
43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32
MD5 hash:
2733564f41cedfc2d3e3f743a4358b23
SHA1 hash:
8711fe03bebdced03cae417e4dadaa17a04d0637
Detections:
AutoIT_Compiled
Create hunting rule
Link:
https://www.unpac.me/results/207bd782-0d13-4ceb-972e-bbfce57f301f/
Parent samples :
ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5
43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32
SH256 hash:
80858ac79c0b8d117c58bf3bae85004fded91c812dd684274a9a7349730d9630
MD5 hash:
2efeda40bedf4271be629571de4798de
SHA1 hash:
67fe925769506d614f3c8d201f10cf44bc4b547e
Link:
https://www.unpac.me/results/207bd782-0d13-4ceb-972e-bbfce57f301f/
SH256 hash:
909ca86f2920ea2d12b27f1368cdb8584dc542fb3bdc8758121512a9fbff4888
MD5 hash:
b4d7a507be074520de4e0af95615cc5a
SHA1 hash:
50b16eafd7e45dbe5dddda393b0a7694fcf54646
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/207bd782-0d13-4ceb-972e-bbfce57f301f/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/43b5215b6259/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/43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32

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_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_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/
Rule name:YahLover
Create hunting rule
Author:Kevin Falcoz
Description:YahLover

File information

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

Formbook

Executable exe ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5

Formbook

Executable exe 43b5215b6259c91a50783e08627245c8fa4d77c90030c3b043c26e4ce61fba32

(this sample)

  
Dropped by
SHA256 ffb76bb8ba846f99098bcd8cd267925028ba92397fbed710cd63934cefe9cbb5
Cape
Cape
https://www.capesandbox.com/analysis/43235/
  
Dropped by
MD5 7ce58604fb78739c4bf75805b5cd29d2

Comments