MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09
SHA3-384 hash: b3d10cb6a7cea1aa05fe37d5d96f9a7e069c1691079e71afcf23391bfbf3022a5bf0be43b628cc98ea35d6b98f847bf5
SHA1 hash: 87138e6bdce9b16526080c976bb3b0902b80aac7
MD5 hash: 4506abb8fbff722201018e3c4a6e6718
humanhash: apart-xray-fix-hawaii
File name:5439286090.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'153'536 bytes
First seen:2026-04-08 05:53:35 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'886 x AgentTesla, 19'802 x Formbook, 12'306 x SnakeKeylogger)
ssdeep 24576:vFdgmtbeMvO6ESpJcig/oRMIVx/n3TBHHyUHTrI5aOH:7eMmwpKdIVxFXHoUQ
TLSH T1193512583689C403CD84977665B1F2784B7D1EEEA920D2234FEC7DB7F962F924809386
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 JoulK
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
138
Origin country :
QA QA
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/79936a36-c5c4-4022-942e-3409b0fbbf8c/
Malware family:
formbook
Create hunting rule
ID:
1
File name:
5439286090.exe
Verdict:
Malicious activity
Analysis date:
2026-04-08 05:55:17 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/8b41e533-ae8c-4508-a582-7a049b6f8eb6

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/60782/
Detection(s):
SecuriteInfo.com.Trojan.Inject6.29041.4203.24021.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69d5ed9c66ab6d001dd020d8
Tags:
virus shell msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-03-09T07:42:00Z UTC
Last seen:
2026-03-26T04:53:00Z UTC
Hits:
~1000
Detections:
Trojan-Spy.Noon.HTTP.ServerRequest PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C Trojan.MSIL.Crypt.sb HEUR:Trojan.MSIL.Crypt.gen
Link:
https://opentip.kaspersky.com/903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09/results?tab=lookup
Malware family:
KeyBase
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ade1f258-308e-4dee-b24a-f174801b294a
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.23 Win 32 Exe x86
Link:
https://app.malva.re/file/4506abb8fbff722201018e3c4a6e6718
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09
Threat name:
ByteCode-MSIL.Trojan.Fuery
Create hunting rule
Status:
Malicious
First seen:
2026-03-09 10:32:05 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
24 of 36 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=sa7man4ftoqodvoek3725opruxclcepgxnhf2yxvqot3y2gyr4eq._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 execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260408-gl43cshy4l/
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
Formbook
Formbook family
Formbook payload
Unpacked files
SH256 hash:
903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09
MD5 hash:
4506abb8fbff722201018e3c4a6e6718
SHA1 hash:
87138e6bdce9b16526080c976bb3b0902b80aac7
Link:
https://www.unpac.me/results/ac49bace-3232-4935-af50-bdf8115b101a/
SH256 hash:
375d9068b62b24e63fff996c8670bc918300df77ca9370e77e8744fe70171ffe
MD5 hash:
9932bf974c771a6568fedc8641059f81
SHA1 hash:
45ae7ae5f9ce36617ed030f912df7ce8f3ea124f
Link:
https://www.unpac.me/results/ac49bace-3232-4935-af50-bdf8115b101a/
SH256 hash:
ce6d184e3b335ea5e02e17fd2ae0ff18e32282c894d5867d47e214eefdb625a3
MD5 hash:
ef8b341e311681d35c2420bc9808d2b3
SHA1 hash:
49d5ee17a52f28dfc5c893cb566adfb6c60c4e81
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/ac49bace-3232-4935-af50-bdf8115b101a/
SH256 hash:
1d505ea8bbeba5f8dafdba977e3798970abec0ded018eca8c8c1d71a510d5b36
MD5 hash:
15185513dcfc65611ee21ddee6d3b94d
SHA1 hash:
76f1da946c7257494d9c81ae3691b4c14063afcd
Link:
https://www.unpac.me/results/ac49bace-3232-4935-af50-bdf8115b101a/
SH256 hash:
9767555f68ed54edc740eb6f5700c60b75683b55b457ac29688493f6520aad54
MD5 hash:
4d265e0bf88e27bb01848d221400aa4a
SHA1 hash:
99ed50f4d8563b1a8f01ba1323aaf9b880a4f428
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/ac49bace-3232-4935-af50-bdf8115b101a/
SH256 hash:
903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09
MD5 hash:
4506abb8fbff722201018e3c4a6e6718
SHA1 hash:
87138e6bdce9b16526080c976bb3b0902b80aac7
Link:
https://www.unpac.me/results/ac49bace-3232-4935-af50-bdf8115b101a/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/903ec037859b/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/903ec037859ba0e1d5c456ffaeb9f1a5c4b111e6bb4e5d62f583a7bc68d88f09

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.

Cape
Cape
https://www.capesandbox.com/analysis/60782/

Comments