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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894
SHA3-384 hash: f61b420d275e46c63dfed480e3f2dc1d2ad800289496ce7f38ac22256aa982733d4008b12c6fb73c8dcda7d4a6918c6b
SHA1 hash: 56e18908558f4652bac0123b9d16bbc719ed609a
MD5 hash: e4a11abf065163684f5f543b8fe06796
humanhash: jupiter-xray-white-lamp
File name:8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'048'064 bytes
First seen:2026-09-18 14:25:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'239 x AgentTesla, 20'493 x Formbook, 12'372 x SnakeKeylogger)
ssdeep 24576:GTjP/2oSdvJs6/Zwvb6LqXjVe+rljawGt4KddLU5mrkS2KX3s:GTb/2oSRMLjVe+rIptDdl2S2Kn
TLSH T15B250208221BDD01C1A21EB019F1E7F406B49E84E622D757DEEA7CEBB93B3952D953C1
TrID 72.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.4% (.EXE) Win64 Executable (generic) (6522/11/2)
4.4% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
dhash icon c0cc8e96c6c6d6d2 (4 x Formbook, 1 x Stealc, 1 x RemcosRAT)
Reporter whack_sh
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
105
Origin country :
US US
Vendor Threat Intelligence
Malware configuration found for:
NETReactor
Details
Link:
https://research.acce.ciphertechsolutions.com/results/7e9166f5-6744-4cf3-b95c-15a413944ffb/
Malware family:
n/a
ID:
1
File name:
https://96f416daf8180c26e5cb80addae0751d.cdn.bubble.io/f1787563273728x765146380683097900/Audit%20report%20Document%20Ref%230046%20%282%29.zip?_gl=1*10nif59*_gcl_au*MTcyNDkwNDI3Ni4xNzg3NTYxNDU1*_ga*MTY5Nzk1MTc0MC4xNzg3NTYxNDA0*_ga_BFPVR2DEE2*czE3ODc1NjE0MDQkbzEkZzEkdDE3ODc1NjE4NjUkajYwJGwwJGgw
Verdict:
No threats detected
Analysis date:
2026-08-25 02:30:44 UTC
Tags:
arch-exec
Link:
https://app.any.run/tasks/e6858eb2-fa72-4a35-91e1-d4790ed161f4

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/86626/
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
entropy formbook net_reactor obfuscated packed packed vbnet
Link:
https://www.filescan.io/uploads/6aad49d52988d53e7e410e56/reports/7dfd94d1-31c7-4654-831c-e3a56c7fb61f/overview
Verdict:
Malicious
Labled as:
FormBook.Generic
Link:
https://www.hybrid-analysis.com/sample/8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-08-24T08:02:00Z UTC
Last seen:
2026-08-31T12:18:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/3bff60a5-1d49-46e5-971b-102abc1f040d
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1974868
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Creates an autostart registry key pointing to binary in C:\Windows
Creates autostart registry keys with suspicious values (likely registry only malware)
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Suricata IDS alerts for network traffic
Suspicious powershell command line found
Switches to a custom stack to bypass stack traces
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
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: 1974868 Sample: 1fmZjI00av.exe Startdate: 18/09/2026 Architecture: WINDOWS Score: 100 48 www.zo1w78i.surf 2->48 50 www.newselectionsynchub.top 2->50 52 12 other IPs or domains 2->52 60 Suricata IDS alerts for network traffic 2->60 62 Found malware configuration 2->62 64 Malicious sample detected (through community Yara rule) 2->64 66 13 other signatures 2->66 11 powershell.exe 23 2->11         started        14 1fmZjI00av.exe 1 6 2->14         started        17 svchost.exe 1 1 2->17         started        signatures3 process4 dnsIp5 76 Adds a directory exclusion to Windows Defender 11->76 78 Loading BitLocker PowerShell Module 11->78 20 1fmZjI00av.exe 11->20         started        23 WmiPrvSE.exe 11->23         started        25 conhost.exe 11->25         started        42 C:\Users\user\AppData\Roaming\Iy.exe, PE32 14->42 dropped 44 C:\Users\user\AppData\...\1fmZjI00av.exe.log, ASCII 14->44 dropped 80 Creates autostart registry keys with suspicious values (likely registry only malware) 14->80 82 Creates an autostart registry key pointing to binary in C:\Windows 14->82 84 Tries to detect virtualization through RDTSC time measurements 14->84 86 3 other signatures 14->86 46 127.0.0.1 unknown unknown 17->46 file6 signatures7 process8 signatures9 68 Modifies the context of a thread in another process (thread injection) 20->68 70 Maps a DLL or memory area into another process 20->70 72 Sample uses process hollowing technique 20->72 74 Queues an APC in another process (thread injection) 20->74 27 explorer.exe 48 2 20->27 injected process10 dnsIp11 54 www.amalagobi.com 172.67.151.230, 49713, 80 CLOUDFLARENET-CloudflareIncUS Canada 27->54 56 150.171.28.12, 443 MICROSOFT-CORP-MSN-AS-BLOCK-MicrosoftCorporationUS United States 27->56 58 sites.ludicrous.cloud 104.18.35.90, 49714, 80 CLOUDFLARENET-CloudflareIncUS Canada 27->58 88 System process connects to network (likely due to code injection or exploit) 27->88 90 Suspicious powershell command line found 27->90 92 Bypasses PowerShell execution policy 27->92 31 svchost.exe 27->31         started        34 powershell.exe 11 27->34         started        signatures12 process13 signatures14 94 Modifies the context of a thread in another process (thread injection) 31->94 96 Maps a DLL or memory area into another process 31->96 98 Tries to detect virtualization through RDTSC time measurements 31->98 102 2 other signatures 31->102 36 cmd.exe 1 31->36         started        100 Found suspicious powershell code related to unpacking or dynamic code loading 34->100 38 conhost.exe 34->38         started        process15 process16 40 conhost.exe 36->40         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894
Verdict:
Malware
YARA:
12 match(es)
Tags:
.Net .Net Obfuscator .Net Reactor Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.66 Win 32 Exe x86
Link:
https://app.malva.re/file/e4a11abf065163684f5f543b8fe06796
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894/
Threat name:
Win32.Trojan.PureLogStealer
Create hunting rule
Status:
Malicious
First seen:
2026-08-24 09:36:25 UTC
File Type:
PE (.Net Exe)
Extracted files:
16
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rnii32h554nnrl6aifq3jwt6utoi36adimymf36tva46h74ehcka._file
Verdict:
malicious
Label(s):
Formbook
Create hunting rule
Link:
https://reports.threatray.com/e8f0a7c6-3956-4c26-a486-40f2acf9f26b
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:b4wd discovery execution persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/260918-rrgt5aaj7v/
Behaviour
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894
MD5 hash:
e4a11abf065163684f5f543b8fe06796
SHA1 hash:
56e18908558f4652bac0123b9d16bbc719ed609a
Link:
https://www.unpac.me/results/b9c0745e-865c-4af6-9e4e-f2874bd11890/
SH256 hash:
0d5db9542d16364e40394a0367b85d57365dfa216f1e6d29f8ed291f41a10f05
MD5 hash:
11206d5b4a2c1fa6f0927545d63259d2
SHA1 hash:
53ffd9ee189a8cc27a162ccca59adc0b387cd588
Link:
https://www.unpac.me/results/b9c0745e-865c-4af6-9e4e-f2874bd11890/
SH256 hash:
0a772e31bfd461356c175024b484d6d9433891dca0639c409592e4d9e7ab207e
MD5 hash:
2c30e8578032e3e015b767cad0b169e0
SHA1 hash:
74b8ccc66e586f898d0f6055f0440bf680f46cd9
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/b9c0745e-865c-4af6-9e4e-f2874bd11890/
SH256 hash:
730681a813f0450b883c4381d0cd02019601c5e0610e82d2fb861e9aadbf9a52
MD5 hash:
480a4c74d9d1a21c2cb89ec8885458a4
SHA1 hash:
936ff8433df44937e0fc5ffa02bba9ffa2616d77
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_w0
Create hunting rule
Formbook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Link:
https://www.unpac.me/results/b9c0745e-865c-4af6-9e4e-f2874bd11890/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/8b508de8fdef/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/8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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.

Web download

Formbook

Executable exe 8b508de8fdef1ad8afc04161b4da7ea4dc8df8034330c2efd3a839e3ff843894

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/86626/

Comments