MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae
SHA3-384 hash: 6029f1116064fa3a812d6e9022b560e8d92a16da63a4eada78b79e4d7331fb6be2252a797211a480252485c7b0f94fb8
SHA1 hash: a9e037c93c9ebbd9855578d25a8a689fe7c48c67
MD5 hash: 932050809b63ce386a36cc76ad0798ff
humanhash: berlin-iowa-sierra-georgia
File name:b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae
Download: download sample
Signature Formbook
Create hunting rule
File size:780'800 bytes
First seen:2025-10-10 06:47:00 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'750 x AgentTesla, 19'654 x Formbook, 12'248 x SnakeKeylogger)
ssdeep 12288:h038x7untvfhIPQvZw+Cus3iQbrsPu0IrmXSmD07cqFGDZPQeyAX30//:h03a7wpfyIvZgus3iQvsPJEmXSmucqMc
TLSH T19BF40259225AEE02E8911FF00870D3B40739BE9E6821C30B8EFBADDF747575566913A3
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.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 :
83
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae.exe
Verdict:
Malicious activity
Analysis date:
2025-10-10 07:46:54 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/3acd274b-2337-4210-bc1f-a0e87fde9e33

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/32178/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68e8adef8b7b147cc4b68e64
Tags:
shell virus msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating 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:
obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/68e8b915d95c58c195500ce3/reports/924470f8-8fcf-4be5-ac73-4781ea31cb3d/overview
Verdict:
Malicious
Labled as:
Genie.8DN.Generic
Link:
https://www.hybrid-analysis.com/sample/b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-17T03:29:00Z UTC
Last seen:
2025-10-11T01:37:00Z UTC
Hits:
~100
Detections:
Trojan-Spy.Noon.HTTP.ServerRequest Trojan-PSW.Win32.Stealer.sb Trojan-Spy.Win32.Noon.sb Trojan.MSIL.Crypt.sb PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C Trojan.MSIL.Taskun.sb Trojan.MSIL.Inject.sb HEUR:Trojan-PSW.MSIL.Agensla.gen
Link:
https://opentip.kaspersky.com/b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/6511da47-a15a-4f15-aa9e-aec89afa8fc6
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.45 Win 32 Exe x86
Link:
https://app.malva.re/file/932050809b63ce386a36cc76ad0798ff
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2025-09-17 06:18:22 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xby4ijik4obvmbr5rszxvnqju5wtzdxaxuplf245s4oxtbj7fgxa._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
unc_loader_078
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/251010-jkcb3ahk81/
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
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/3a8906f2-5884-4a86-b517-cf3451222097
Unpacked files
SH256 hash:
b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae
MD5 hash:
932050809b63ce386a36cc76ad0798ff
SHA1 hash:
a9e037c93c9ebbd9855578d25a8a689fe7c48c67
Link:
https://www.unpac.me/results/f6c30af5-2c27-4bcf-97ea-59af2ff008e5/
SH256 hash:
b2ac00d97c373c7efe7b9a54ce8b9f8b317ef919f29c45e3cdcfac3545674800
MD5 hash:
3d4e92fe67d6c1780f213fd51c36df1f
SHA1 hash:
8285892de43aa6bf4fd6bb52d05c937095c7b1be
Link:
https://www.unpac.me/results/f6c30af5-2c27-4bcf-97ea-59af2ff008e5/
SH256 hash:
b90d9763aa1ba4cdbe05ecfd55e82176b2b2ae28de8b8f32e4cc836e78953a70
MD5 hash:
ad68034796ad2637a27ee1c48858a730
SHA1 hash:
a56fdb949067cc3179d7960a21d5305d398322d2
Link:
https://www.unpac.me/results/f6c30af5-2c27-4bcf-97ea-59af2ff008e5/
SH256 hash:
6ef7bcddafab2d060df95e1c5c301b961c88f3c839b7659f23e41df22d637f9b
MD5 hash:
032ae4198a2e13111a75cd1221433b92
SHA1 hash:
f3b788af1a5fd0339a584e7a5c25f9a89cbc8bc1
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/f6c30af5-2c27-4bcf-97ea-59af2ff008e5/
SH256 hash:
177aa5ab1e9fa7396c21003694515407e570faed204a12da977895756b57fd36
MD5 hash:
63394611b4aafbaccab5a07ae9eb6c7f
SHA1 hash:
7ffebcf995114928d1c5dec04a15bae3b4185bd7
Link:
https://www.unpac.me/results/f6c30af5-2c27-4bcf-97ea-59af2ff008e5/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b871c4250ae3/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/b871c4250ae38356063d8cb37ab609a76d3c8ee0bd1eb2eb9d971d79853f29ae

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:CP_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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: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/32178/

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