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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5. 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: 16


Intelligence 16 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5
SHA3-384 hash: 04237d34ff65d1d335d8ba2248cf7df10ea0d39d9334884daf6805a3efb11fcaf10d1ec0ece4718147a2d6c8d98f252c
SHA1 hash: 1719b5a4d4866733f5ef626331f973b347f8f889
MD5 hash: fba75622058932bf7fe54c64ed225e29
humanhash: shade-papa-butter-kentucky
File name:SecuriteInfo.com.Win32.MalwareX-gen.17173.13296
Download: download sample
Signature Formbook
Create hunting rule
File size:844'288 bytes
First seen:2026-10-26 08:50:19 UTC
Last seen:Never
File type:Executable exe
MIME type:application/vnd.microsoft.portable-executable
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'361 x AgentTesla, 20'867 x Formbook, 12'418 x SnakeKeylogger)
ssdeep 12288:xRSATMlLwmGTSvb4RqS5mHLxXwz187f+AkWbjo2caI9dH0ikFz5VHCd:PSATMmzM1dHLxXw6SW69x0F1i
TLSH T1B705011971271513D4B1AEF00D35E4F157762DAA2138E2E98FC62CABB6E7B10BD42327
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 71f8febeab80c071 (4 x Formbook, 3 x PureLogsStealer, 1 x AgentTesla)
Reporter SecuriteInfoCom
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
237
Origin country :
FR FR
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/291dbdf6-6cfe-429a-892b-52eb4e381cf8/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-10-26 14:30:51 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/17cc0676-05f7-4dd9-b60a-fb61b4f5ce8a

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/95064/
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.17173.13296.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6adf1451afb06e650cd92b33
Tags:
shell micro cupi
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating synchronization primitives
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Adding an exclusion to Microsoft Defender
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade packed vbnet
Link:
https://www.filescan.io/uploads/6adf144fc9a9c5cb3e831ecd/reports/047bc8b1-e90c-4b28-bccc-f1e556e0e53d/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-10-26T00:46:00Z UTC
Last seen:
2026-10-27T22:59:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/50e73d43-d40d-499f-ae3e-5f33331bccd2
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1993136
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Adds a directory exclusion to Windows Defender
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.39 Win 32 Exe x86
Link:
https://app.malva.re/file/fba75622058932bf7fe54c64ed225e29
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5/
Threat name:
Win32.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2026-10-26 06:22:34 UTC
File Type:
PE (.Net Exe)
Extracted files:
14
AV detection:
18 of 24 (75.00%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7xbzr5k4ypc42av7j4y7btzip6lp3yzkunybc7oubkuqc7cmyp2q._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/261026-krr7ja1y2r/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5
MD5 hash:
fba75622058932bf7fe54c64ed225e29
SHA1 hash:
1719b5a4d4866733f5ef626331f973b347f8f889
Link:
https://www.unpac.me/results/616a79d4-e9c9-4e97-827c-e20238796ec3/
SH256 hash:
2015ad79a32d96b3b8a582a36059213d7a82af11c3ced5eaf183b0f9224edf8e
MD5 hash:
0ba8bcfdbdcceee7ea1454340f35065c
SHA1 hash:
90385df25ad02357dbdf38830852c5e8053c6708
Link:
https://www.unpac.me/results/616a79d4-e9c9-4e97-827c-e20238796ec3/
SH256 hash:
b9ef8fef5b455817a626806044ae6567cb1f7bafaa7d17a7724a02a25f90d2d2
MD5 hash:
86ce51cb209a5dcd67d0b47572b4e9e2
SHA1 hash:
b6ea8196e73da138d403048b659127ffd5c0c73f
Link:
https://www.unpac.me/results/616a79d4-e9c9-4e97-827c-e20238796ec3/
SH256 hash:
b07ef574d60e94386e15565b76d57c34b1b547b5f169eb1058e39c65716f2e70
MD5 hash:
633ca1967c135e9dc4d7009eb6359c12
SHA1 hash:
d5da6dbe89366b08bf8172338524ada6900775b5
Link:
https://www.unpac.me/results/616a79d4-e9c9-4e97-827c-e20238796ec3/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fdc398f55cc3/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/fdc398f55cc3c5cd02bf4f31f0cf287f96fde32aa370117dd40aa9017c4cc3f5

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: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
Rule name:WIN_Malware_Derialock_ForgeAuto_3127f957_Extrait
Create hunting rule
Author:Marjoriefort
Description:Detects Derialock (pe, etat extrait)
Rule name:WIN_Malware_XWorm_ForgeAuto_6b06c990_Extrait
Create hunting rule
Author:Marjoriefort
Description:Detects XWorm (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.

Cape
Cape
https://www.capesandbox.com/analysis/95064/

Comments