MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15
SHA3-384 hash: fe5e9bf57d788cebc71840d2aa5f2551296870ec5ac372a188cb2826ecafc47af8925ced01607c797e0de41d9cf248f4
SHA1 hash: 471b20f6bd9df33504d5b7c33c39359bb607b5b9
MD5 hash: b4468307436f3490f2a22e2ce8ec8ae1
humanhash: robin-five-illinois-robin
File name:qTbDdqAuK9N0zaU.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'151'488 bytes
First seen:2026-02-26 07:54:09 UTC
Last seen:2026-03-02 08:15:46 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'820 x AgentTesla, 19'743 x Formbook, 12'286 x SnakeKeylogger)
ssdeep 24576:yo6LKbAKqixsngVniJhOT+d/lLov/TI5aO:yo+KFCg0OStEv8U
Threatray 2'699 similar samples on MalwareBazaar
TLSH T16635F16426A6CC17C379433219A0F27897B1CD97A111D24ABEED3DDB7B6AF150A83343
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 threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
196
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
NETReactor RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/539cffa9-dd10-4450-be15-4fa070763e60/
Malware family:
n/a
ID:
1
File name:
_85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15.exe
Verdict:
Malicious activity
Analysis date:
2026-02-26 07:54:36 UTC
Tags:
auto-startup susp-lnk
Link:
https://app.any.run/tasks/e50a4020-976d-4041-a21c-de165655b17c

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/54660/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=699ffc2e8fffa866e3b24f2e
Tags:
autorun virus shell msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
bitmap formbook net_reactor obfuscated packed packed packed stego vbnet
Link:
https://www.filescan.io/uploads/699ffc2c97feb4afd65c2acf/reports/b2a93ae7-c155-4269-bb37-c2219424938b/overview
Verdict:
Malicious
Labled as:
Ser.Tedy.Generic
Link:
https://www.hybrid-analysis.com/sample/85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15
Verdict:
Malicious
File Type:
exe x32
Detections:
Trojan-Spy.Noon.HTTP.ServerRequest PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C HEUR:Trojan.MSIL.Injuke.gen
Link:
https://opentip.kaspersky.com/85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15/results?tab=lookup
Malware family:
KeyBase
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/eaee6e00-0db3-484a-9617-358f7a360caa
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1875177
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Suspicious powershell command line found
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)
Windows shortcut file (LNK) contains suspicious command line arguments
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1875177 Sample: qTbDdqAuK9N0zaU.exe Startdate: 26/02/2026 Architecture: WINDOWS Score: 100 52 www.64869.xyz 2->52 54 www.showbizfloor.com 2->54 56 18 other IPs or domains 2->56 84 Antivirus detection for URL or domain 2->84 86 Antivirus / Scanner detection for submitted sample 2->86 88 Multi AV Scanner detection for submitted file 2->88 92 9 other signatures 2->92 11 qTbDdqAuK9N0zaU.exe 7 2->11         started        15 powershell.exe 15 2->15         started        signatures3 90 Performs DNS queries to domains with low reputation 52->90 process4 file5 46 C:\Users\user\AppData\...\msFNyHnaWYvx.exe, PE32 11->46 dropped 48 C:\Users\...\msFNyHnaWYvx.exe:Zone.Identifier, ASCII 11->48 dropped 50 C:\Users\user\...\qTbDdqAuK9N0zaU.exe.log, ASCII 11->50 dropped 94 Adds a directory exclusion to Windows Defender 11->94 96 Injects a PE file into a foreign processes 11->96 98 Unusual module load detection (module proxying) 11->98 17 qTbDdqAuK9N0zaU.exe 11->17         started        20 powershell.exe 23 11->20         started        22 msFNyHnaWYvx.exe 5 15->22         started        24 conhost.exe 1 15->24         started        signatures6 process7 signatures8 64 Maps a DLL or memory area into another process 17->64 26 4mv8CFK0B.exe 17->26 injected 66 Loading BitLocker PowerShell Module 20->66 28 WmiPrvSE.exe 20->28         started        30 conhost.exe 20->30         started        68 Antivirus detection for dropped file 22->68 70 Multi AV Scanner detection for dropped file 22->70 72 Injects a PE file into a foreign processes 22->72 74 Unusual module load detection (module proxying) 22->74 32 msFNyHnaWYvx.exe 22->32         started        process9 process10 34 sc.exe 13 26->34         started        signatures11 76 Tries to steal Mail credentials (via file / registry access) 34->76 78 Tries to harvest and steal browser information (history, passwords, etc) 34->78 80 Modifies the context of a thread in another process (thread injection) 34->80 82 4 other signatures 34->82 37 WPnvlvp6UWs.exe 34->37 injected 40 chrome.exe 34->40         started        42 firefox.exe 34->42         started        process12 dnsIp13 58 www.64869.xyz 154.85.206.109, 49731, 49732, 49733 DXTL-HKDXTLTseungKwanOServiceHK Seychelles 37->58 60 zhs.zohosites.com 136.143.189.12, 49771, 49772, 49773 ZOHO-ASUS United States 37->60 62 13 other IPs or domains 37->62 44 WerFault.exe 40->44         started        process14
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.54 Win 32 Exe x86
Link:
https://app.malva.re/file/b4468307436f3490f2a22e2ce8ec8ae1
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2026-02-26 06:31:33 UTC
File Type:
PE (.Net Exe)
Extracted files:
41
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qxh7x5jiajpyvcxxsnpj4hxsqwu5ui6lr5cuw6auhkzjmdjttikq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
25230a687002161160427e213dcdd2a17ae50d9b3ba9679916e238b55b61a6d2
Formbook
3c97c9c3fd33f0deafc90dac2192ca8a44a44732368e02fdafbf35da539091aa
Formbook
61faeb3857dc422b26292ff17b24a2ed3cb18415f8c0a6f64a707c51a0a9c147
Formbook
7f9d39908a024cc37cdece4ecc8aa724695ee2873d80ed4b1e7f8f8f3ee7ed5d
Formbook
996af4d198b0b45434f13f844a5cf9f133c81802814cd79a4be20e0e1c6373a3
Formbook
99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6
Formbook
c9a7422e9bda1f8e36f23648857c16fe5332be73c474503b6502eccf4d5ed059
Formbook
ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7
Formbook
error
Formbook
f4160d848ce8fc3d06604dbed868251d960839dc351673a5aec208ba48ebfc7e
Formbook
+ 2'689 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260226-jrn97sfv7g/
Behaviour
Suspicious behavior: EnumeratesProcesses
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
Checks computer location settings
Drops startup file
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Unpacked files
SH256 hash:
85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15
MD5 hash:
b4468307436f3490f2a22e2ce8ec8ae1
SHA1 hash:
471b20f6bd9df33504d5b7c33c39359bb607b5b9
Link:
https://www.unpac.me/results/602b029a-d6f0-4003-a1d9-cdfa2e2582b0/
SH256 hash:
0bfd239d51a6f775f5157222246c02d0e72c31fb130f4e3722bfbf644bdee382
MD5 hash:
7ae9d31c959adb3b412a12acc34113b4
SHA1 hash:
0c23ad65dd5d670dc2af83cd74518ffa0357e01d
Link:
https://www.unpac.me/results/602b029a-d6f0-4003-a1d9-cdfa2e2582b0/
SH256 hash:
57cea68816b6735b98bbdc2d1f081f0e9ea12a233d4547a92f495c00adceebbe
MD5 hash:
ac766c223e1b863c6617debd08669fc3
SHA1 hash:
35b9b30f932adb503aa07dbdf35e053a93e4751f
Link:
https://www.unpac.me/results/602b029a-d6f0-4003-a1d9-cdfa2e2582b0/
SH256 hash:
15008718885bee209b7734ebfd514cd54bcb252f982a04618ae4c4d55e07c123
MD5 hash:
3650f1cc497f4304bf4fbc374078e75b
SHA1 hash:
5ee625a0fd49d574575a28acda8ff760a9fca3bb
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/602b029a-d6f0-4003-a1d9-cdfa2e2582b0/
SH256 hash:
115f4da00065e1a2096cf7cc0fa2b7efe20051c25379ce86fad8015c390caca9
MD5 hash:
14c5097e40adb9cbb8a1383abc40b84b
SHA1 hash:
8b84e19e87661b8b2da0f6e349a59e054779d48e
Link:
https://www.unpac.me/results/602b029a-d6f0-4003-a1d9-cdfa2e2582b0/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/85cffbf52802/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe 85cffbf528025f8a8af7935e9e1ef285a9da23cb8f454b78143ab2960d339a15

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/54660/

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