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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e. 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: 15


Intelligence 15 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e
SHA3-384 hash: 7f37c208b04e6e0f9dbfcf32ad18c792afe641854d7a86fadb99d095a647228f24a92b98c215f1aa93e006a59c6d89d3
SHA1 hash: 7297477c9493756d45c41f852459e1cfb9c64358
MD5 hash: d25618ff921021bed6f79f10b41c40c8
humanhash: eighteen-quiet-lemon-pip
File name:Enquiry 042026.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:892'928 bytes
First seen:2026-10-19 06:47:16 UTC
Last seen:Never
File type:Executable exe
MIME type:application/vnd.microsoft.portable-executable
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'291 x AgentTesla, 20'706 x Formbook, 12'401 x SnakeKeylogger)
ssdeep 12288:+n27n4P0DGI5iT4tX/p9NjQFfhE9q1sNM+hXz/w+I6k7jeuJ2mGdnrSFFo6:E4xZnMuuNKz/wp6kzGtrSjo
TLSH T101158B042217DA23D26466B1C9B2D2F40374DE54E833C33B5AEA7DB77F36BB595402A2
TrID 73.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.6% (.EXE) Win64 Executable (generic) (6522/11/2)
4.5% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
164
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
NETReactor RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/b4de4a76-9276-4204-8763-8424de854760/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
Malicious activity
Analysis date:
2026-10-19 07:07:58 UTC
Tags:
netreactor
Link:
https://app.any.run/tasks/d7538d2c-6aab-461c-903b-b3b8ba442fb4

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/92603/
Detection(s):
Win.Tool.Generic-10060632-0
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6ad5c1a8afb06e650cd7d29d
Tags:
virus shell msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Creating synchronization primitives
Blocking the Windows Defender launch
Adding an exclusion to Microsoft Defender
Gathering data
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-10-06T01:40:00Z UTC
Last seen:
2026-10-21T03:50:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/db21596a-9537-4dd6-a090-ff63489dc262
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e
Verdict:
Malware
YARA:
12 match(es)
Tags:
.Net .Net Obfuscator .Net Reactor Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.64 Win 32 Exe x86
Link:
https://app.malva.re/file/d25618ff921021bed6f79f10b41c40c8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e/
Threat name:
ByteCode-MSIL.Trojan.PureLogStealer
Create hunting rule
Status:
Malicious
First seen:
2026-10-06 04:58:57 UTC
File Type:
PE (.Net Exe)
Extracted files:
14
AV detection:
28 of 36 (77.78%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jkp7wdxxq2kpt3fgpbcgzow2zv7okmhpbg4tlnxatfh4rtyesqha._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery evasion execution rat spyware stealer trojan
Link:
https://tria.ge/reports/261019-hkjkps1xfw/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Modifies Windows Defender DisableAntiSpyware settings
Unpacked files
SH256 hash:
4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e
MD5 hash:
d25618ff921021bed6f79f10b41c40c8
SHA1 hash:
7297477c9493756d45c41f852459e1cfb9c64358
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/a9bf1a20-3719-4209-9f2f-7157d2294629/
SH256 hash:
af44169dd023cd63f8c453900b35e79eac825f7d1cf1046892c9a24aeaff5faa
MD5 hash:
bb159f783e30c696aafc54ceaaaacced
SHA1 hash:
049da4650bdd770cc99c9716a8edc7a00377b482
Link:
https://www.unpac.me/results/a9bf1a20-3719-4209-9f2f-7157d2294629/
SH256 hash:
783064541c490386ad9fe5b9660b68b09ddf4a203789612ccacc5924e327c0ef
MD5 hash:
479fdf77fa51a32d0b3fb4eefb82e655
SHA1 hash:
265819f52c579b446c5e79daf98911483df1af4e
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/a9bf1a20-3719-4209-9f2f-7157d2294629/
Parent samples :
a0aaff2946ba2bf57f5e94c081bf289a8ddb7f2edee21ba0be9796c769946f76
ac927aaf104545b1fa57b638a9ae8a7e1401b72095936bc8b36788fd2aa1c306
69a482c5823cd333423121c9eb9235d445467018d48a964b634ed4cf3754c37b
0761a56193a5ce6cc03b4fa36c77b80dcc43dd638c5232f32cae5eb2f5727ced
0926f6f79fcac8bc7e1e1e7027743a37662a1db79464fd24dc12c6c199ddee21
50de568b3bd5bdc9855aa047713706d77238e8e7c0bb3aae94123fb8456b2cb4
f103df0af6684dd4e14e698172bc510552053197b2aa2daa075679682ddaaf6d
10333cfe3b8de037f163d4e80af8e1f18cd5ca7af555dbc9c1da5409925a079d
9c374c3801bdcfa56b3c6c264ecb9e54acae6536b5ca77b9927abf76592457a4
fa1d013f5d8f4833ca5e80b1987ce0908625fab234048fe16e293d5ccbb963fa
17161ca9b95f7b2550a69cc0f2fce78ae93ae27869f6652fd54cbc2bbec68b38
2450fabd7c6ac77f8c79b9171f4a9f85faf200c46cf3390930847f677347abe6
250380549748b8085f2170e99addd69b43d5d27435b24e2255585fc50bc34f29
21c98a33289a92c716abf3965bdcee510fe8c60ae93ed60d368e36e8d104f5d6
2f2b11b824f79a6b59028385ec91927a69204dcbaab7c2d40d3c8992477de3f1
7893f186211d866042285c83d177181db696546eb4075a77b9e6ace517325fb6
7934466ab60c046cafd2ee1515c527a9b4ed3c565de89284a6b4bd30fb8398da
85bbb20814fb9989803918ae9771cfba9cde599d93924f54c41f008b1996a5fb
b01615298c09ce4b58772668a5c77faa6d95fee84659a8b598dbe1b5a0a5f78f
dd5993de9315b3b1585cc8bb912d1e76a5c33477e3677ec9edb08776e3d2b62a
e13e1d805c67de591f734d825629743d31dcfc77cb67f89237474675208817de
f03b875c2d39e0761b6dcd95e17ec093ed9719d9a08065a513c60898f6f0eb0d
f69d066111143c7ffa990c326634540cc195c12a89377763571709c763b98854
f6cc3424f720b692b860d3220a252fde363cc1b4be8cf6d6a422533f52446a1e
4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e
151355d4e162afc65c8f9569e78c02fa071d84041cc0253cfaf98ad5a9e96435
SH256 hash:
0039cd657b8168c31ae87e10085b2c8b461cc02b23fd1e7f21a764d6b4170883
MD5 hash:
2782c57ed6023595f38d0b42024d8a56
SHA1 hash:
448caa0e0f05c88042a6db7513488b1c92018ec3
Link:
https://www.unpac.me/results/a9bf1a20-3719-4209-9f2f-7157d2294629/
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/4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e

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:DotNet_RGB_Embedded_AssemblyLoader_Hunt
Create hunting rule
Author:ShadowOpCode
Description:Hunt .NET bitmap RGB extraction combined with embedded resources and assembly loading
Rule name:HUNT_NET_Loader_ImagePixel_To_AssemblyLoad
Create hunting rule
Author:Anish Bogati
Description:Hunting: .NET loader that reads pixel data from an embedded image, loads it as a .NET assembly, and runs it via reflection or late binding. Catches bitmap-steganography loaders.
Rule name:NET
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
Rule name:WIN_Malware_Derialock_ForgeAuto_3127f957_Extrait
Create hunting rule
Author:Marjoriefort
Description:Detects Derialock (pe, etat extrait)
Rule name:WIN_Sample_Unique_69354b41
Create hunting rule
Author:Marjoriefort
Description:Specimen unique (soumission Bazaar) - strings distinctifs propres au sample
Reference:69354b41e10daf03d3f3af881b32d5c0fec56b1cfe96629fd4c5263413a42854.exe

File information

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

Malspam

Formbook

Executable exe 4a9ffb0ef78694f9eca678446cbadacd7ee530ef09b935b6e0994fc8cf04940e

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/92603/

Comments