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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673
SHA3-384 hash: 908bbcdfc5517ed459a2b49730c568afbd136de96cd4adf54913e6850647cc7ad5485b1f58db6f5e75d1250be4584682
SHA1 hash: b1cc51fda64aca3e4919435f10175cd782d0e68a
MD5 hash: 42cd21e5119193f0b631f87d9c87e36c
humanhash: delta-johnny-wisconsin-september
File name:Invoice No. 1563029253.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'144'832 bytes
First seen:2026-09-01 08:59:52 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'233 x AgentTesla, 20'466 x Formbook, 12'372 x SnakeKeylogger)
ssdeep 24576:MG8I1h6LHEbw9Ht/+66Tz5tXx5BHKmIl7+2gM2WsX:MrltmHTz5FBKJcvJT
TLSH T10F3501142219CE07C4765FF40971E2F41B795E89EA22C313EFEABEEFB57A7101855282
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
dhash icon 060e0e0e06969696 (33 x Formbook, 1 x AgentTesla)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
201
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/23a32985-8fd2-47db-b601-2a427dc42dec/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
Malicious activity
Analysis date:
2026-09-01 09:08:29 UTC
Tags:
netreactor
Link:
https://app.any.run/tasks/9073b705-9413-4a85-9fb5-df62a38b8ab9

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/83524/
Detection(s):
SecuriteInfo.com.Trojan.Inject7.2544.4800.23491.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Blocking the Windows Defender launch
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
formbook masquerade nanocorerat packed vbnet
Link:
https://www.filescan.io/uploads/6a969428c16c7fbe83375ac6/reports/bba519b8-4dd0-4bc6-9b58-8064a6871522/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-09-01T04:08:00Z UTC
Last seen:
2026-09-03T03:39:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/21d36577-d7e0-4dde-96ea-1ab0e38fb1df
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1966612
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
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)
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)
Yara detected AntiVM3
Yara detected FormBook
Yara detected MSIL Injector
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1966612 Sample: Invoice No. 1563029253.exe Startdate: 01/09/2026 Architecture: WINDOWS Score: 100 31 www.bandatransportoare.xyz 2->31 33 www.yaksamedia.com 2->33 35 9 other IPs or domains 2->35 43 Multi AV Scanner detection for submitted file 2->43 45 Yara detected MSIL Injector 2->45 47 Yara detected FormBook 2->47 51 6 other signatures 2->51 10 Invoice No. 1563029253.exe 3 2->10         started        signatures3 49 Performs DNS queries to domains with low reputation 31->49 process4 file5 29 C:\Users\...\Invoice No. 1563029253.exe.log, ASCII 10->29 dropped 61 Injects a PE file into a foreign processes 10->61 14 Invoice No. 1563029253.exe 10->14         started        17 Invoice No. 1563029253.exe 10->17         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 14->63 65 Maps a DLL or memory area into another process 14->65 67 Queues an APC in another process (thread injection) 14->67 69 Found direct / indirect Syscall (likely to bypass EDR) 14->69 19 xGRyMhio7H.exe 14->19 injected process9 process10 21 getmac.exe 13 19->21         started        signatures11 53 Tries to steal Mail credentials (via file / registry access) 21->53 55 Tries to harvest and steal browser information (history, passwords, etc) 21->55 57 Modifies the context of a thread in another process (thread injection) 21->57 59 3 other signatures 21->59 24 ks6taPWcVD.exe 21->24 injected 27 firefox.exe 21->27         started        process12 dnsIp13 37 www.bandatransportoare.xyz 185.46.40.240, 49717, 49718, 49719 ATAK-ASTR Turkey 24->37 39 w021dd24.kasserver.com 85.13.164.6, 49721, 49722, 49723 NMM-ASD-02742FriedersdorfHauptstrasse68DE Germany 24->39 41 5 other IPs or domains 24->41
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.31 Win 32 Exe x86
Link:
https://app.malva.re/file/42cd21e5119193f0b631f87d9c87e36c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
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Status:
Malicious
First seen:
2026-09-01 09:00:29 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
23 of 38 (60.53%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7jadops2tusgfvemvstgyixzrzs45pqp4bpydxhef2xji5ssmzzq._file
Verdict:
malicious
Label(s):
Formbook
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Link:
https://reports.threatray.com/4a89588c-60ca-4f5e-a58a-f27d373e49da
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook discovery evasion rat spyware stealer trojan
Link:
https://tria.ge/reports/260901-kyhxfayzby/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Family: Formbook
Formbook payload
Modifies Windows Defender DisableAntiSpyware settings
Unpacked files
SH256 hash:
fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673
MD5 hash:
42cd21e5119193f0b631f87d9c87e36c
SHA1 hash:
b1cc51fda64aca3e4919435f10175cd782d0e68a
Link:
https://www.unpac.me/results/3ca567a6-5ab7-4ee5-8844-37a0b1167221/
SH256 hash:
130c9f23a7a5ba673219da983e25d4f427f69fd01c6d25c9a37317fd0c8b5019
MD5 hash:
6bd5946c437973bc849cef0d6d77eaef
SHA1 hash:
009144d539abf4935a22c321879a170362bfa94f
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/3ca567a6-5ab7-4ee5-8844-37a0b1167221/
Parent samples :
b4b38e1c2c99174f61ed28ee6651e492eb699ccb387433a0cf3861a73967706b
bb0e7d8f68274b32a12a3907fe52d5f1beae19a3ba1bd2c0a23cbbcf57fca2bb
fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673
97ef870406a1f48080539a324094cdb9eae8f41aeafdc8be86f4c4aaa5a4f14e
09eb32938a0f1265b45c4724b1d994fbc6d2b2ad99f0fab17f545c93e2f42693
SH256 hash:
ae2504e4c68042a7b0f21a08a2e7575a0c1ce826d19f4ef037ac57e1cdfa63fe
MD5 hash:
1c5e079701632b436068b76cb8ddcecc
SHA1 hash:
f2dade7833c26eac6b6f6a42a77bd1eba043103c
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/3ca567a6-5ab7-4ee5-8844-37a0b1167221/
SH256 hash:
0aca3c39b8c20307b95837586d3c02a49b22613ca19469819af9716a066f6eb0
MD5 hash:
1f47e045ae948e114c740b5f31d40ca5
SHA1 hash:
eff74fa9390241d126ce837d3cf2a6fe21142e32
Link:
https://www.unpac.me/results/3ca567a6-5ab7-4ee5-8844-37a0b1167221/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fa40373e5a9d/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/fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673

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 fa40373e5a9d2462d48caca66c22f98e65cebe0fe05f81dce42eae9476526673

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/83524/

Comments