MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853. 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: 18


Intelligence 18 IOCs YARA 19 File information Comments
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SHA256 hash: a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853
SHA3-384 hash: fc6876b2652c009ebda0f8978548b72469c9c3b2a6896d59a7a014bcd03ea9e675af529755ab8499ce9e1714c2d21611
SHA1 hash: 373e0908dbd752f4a0b80b8b82cebb2d03922695
MD5 hash: 358de6611c73ddb680afe724604b02e0
humanhash: fruit-indigo-five-happy
File name:Order#NB012616.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'141'248 bytes
First seen:2026-01-16 13:16:22 UTC
Last seen:2026-01-16 14:44:21 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 91d07a5e22681e70764519ae943a5883 (126 x Formbook, 32 x a310Logger, 27 x AgentTesla)
ssdeep 24576:qtb20pkaCqT5TBWgNQ7abG7ahLJME2U6A:XVg5tQ7abGiJrf5
TLSH T16835CF2373EE8361C3B25173BA55B701AEBF782506B5F86B2FD8093DE920121525E673
TrID 40.3% (.EXE) Win64 Executable (generic) (10522/11/4)
19.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
17.2% (.EXE) Win32 Executable (generic) (4504/4/1)
7.7% (.EXE) OS/2 Executable (generic) (2029/13)
7.6% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
155
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
AutoIt AutoStones
Details
AutoIt
extracted scripts and files
AutoStones
the names of side-loaded components and, if available from processing of a parent file, the deobfuscated components
Link:
https://research.acce.ciphertechsolutions.com/results/f5093fea-8635-4ce6-8fd1-1b72c6ac2afe/
Malware family:
n/a
ID:
1
File name:
_a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853.exe
Verdict:
Malicious activity
Analysis date:
2026-01-16 13:18:20 UTC
Tags:
autoit
Link:
https://app.any.run/tasks/94d99e2a-6c96-416d-9c36-aaa8c2c4c2ee

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/49080/
Detection(s):
SecuriteInfo.com.PSW.Agent.BORA.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=696a3a34ef906a21abcdbbfc
Tags:
autoit emotet
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug autoit compiled-script fingerprint keylogger masquerade microsoft_visual_cc packed
Link:
https://www.filescan.io/uploads/696a3a30f3caa3bca067889b/reports/d2ee38c2-968d-4396-98f1-ae40fb982c53/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-16T09:26:00Z UTC
Last seen:
2026-01-18T11:34:00Z UTC
Hits:
~1000
Detections:
Backdoor.Agent.HTTP.C&C Trojan-Spy.Win32.Noon.sb Trojan-PSW.Win32.Stealer.sb Trojan.Win32.Zenpak.sb Trojan.Win32.Strab.sb Trojan-Spy.Win32.Noon.bpjx Trojan-Spy.Noon.HTTP.ServerRequest Trojan-Dropper.Win32.Dorifel.sbd Trojan.Win32.Agent.sb PDM:Trojan.Win32.Generic Trojan.Win32.Inject.sb Trojan.Win32.Auzenpak.sb
Link:
https://opentip.kaspersky.com/a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5f3cc987-a603-4d94-b2c7-d6ec9c26c4db
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1852003
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
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 submitted file
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
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)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1852003 Sample: Order#NB012616.exe Startdate: 16/01/2026 Architecture: WINDOWS Score: 100 31 xt_skip.outgedns770.com 2->31 33 www.globalpencil.site 2->33 35 20 other IPs or domains 2->35 43 Suricata IDS alerts for network traffic 2->43 45 Antivirus detection for URL or domain 2->45 47 Antivirus / Scanner detection for submitted sample 2->47 49 6 other signatures 2->49 11 Order#NB012616.exe 4 2->11         started        signatures3 process4 signatures5 59 Binary is likely a compiled AutoIt script file 11->59 61 Writes to foreign memory regions 11->61 63 Maps a DLL or memory area into another process 11->63 65 Switches to a custom stack to bypass stack traces 11->65 14 svchost.exe 11->14         started        process6 signatures7 67 Maps a DLL or memory area into another process 14->67 69 Unusual module load detection (module proxying) 14->69 17 oefGdc0gO4VNdv.exe 14->17 injected process8 process9 19 reg.exe 13 17->19         started        signatures10 51 Tries to steal Mail credentials (via file / registry access) 19->51 53 Tries to harvest and steal browser information (history, passwords, etc) 19->53 55 Modifies the context of a thread in another process (thread injection) 19->55 57 4 other signatures 19->57 22 smkgMLgJEk.exe 19->22 injected 25 chrome.exe 19->25         started        27 firefox.exe 19->27         started        process11 dnsIp12 37 hindustan.ist 15.197.225.128, 49721, 49727, 49728 TANDEMUS United States 22->37 39 radiancepurpose.com 51.75.59.39, 49731, 49732, 49733 OVHFR France 22->39 41 12 other IPs or domains 22->41 29 WerFault.exe 4 25->29         started        process13
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853
Threat name:
Win32.Malware.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2026-01-16 12:44:22 UTC
File Type:
PE (Exe)
Extracted files:
13
AV detection:
19 of 24 (79.17%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uioouuvgnsyc35y4ijesx55m6tldsmzh7sopyifh3pzemr357bjq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
autoit
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/260116-qh3jsshz8b/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/5d656aa3-152f-4062-94b9-96f4fd8cdd09
Unpacked files
SH256 hash:
a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853
MD5 hash:
358de6611c73ddb680afe724604b02e0
SHA1 hash:
373e0908dbd752f4a0b80b8b82cebb2d03922695
Link:
https://www.unpac.me/results/462bddec-4210-4e64-83a3-3d450457501e/
SH256 hash:
333440f1ec3ee5d6b5cb6dcad3e08fbb4b94e1bbd9ecb866b01d7e9b27749f71
MD5 hash:
cf6c3ab5ffdf60532336db0677ec676e
SHA1 hash:
0d3e6f1f52050b075331b5660e0c0eb154a85311
Link:
https://www.unpac.me/results/462bddec-4210-4e64-83a3-3d450457501e/
SH256 hash:
6de8e7b8b4aeb1b9fa68a57029c25aa004478a808877036f3de2ec526b130959
MD5 hash:
c765ef9ec487f57f232a03ae1addcc16
SHA1 hash:
1bbdd8f976a1f08c70d703245d6d6e2775f7a38c
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/462bddec-4210-4e64-83a3-3d450457501e/
Parent samples :
901891aee909a9e9c4deccca42311c0b7b5aaedea79082512b6e81db2f2e4323
11ac85099031a8d3c666ae8295d1b36a0115bd9b3c319481ee7f39450613054a
a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853
ca1d88d18d99a6f7f3fbe805327a369ba75594669c02d8f86e30f1ad8c56a2b4
0cc5a2fd9f73331cd37bef1667d4057e325c098602c61de8aa3a94cfe08cc519
ccb84b327afb07bccbe3367be35abe53ccb8f0ad9a815bb098e30029387def10
8a226b58f29599b98ff089f0dd5ecb845dbac90982ed15337734886e15912952
60cd8949dd366aa94383409dde4e7840d85db4f2cea2eef7f773b9fe2d36bc68
544c6d4ae8075826b97fd416d9ff441989a785bf3e945851494d0db18728f604
9fc9401b548091b02b74da0ea58aa279db23c47c5ab2bfaacea4605df89d511d
750d0ef6eaaac00190a10d38493cf765fcb9a9076ecf4d52ca356af4a650585f
626bb341a8d9ec79994bc12565a9f3c4c6944dc79ba65d66aa35fc9d9ff7e5f4
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a21cea52a66c/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/a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:TH_Generic_MassHunt_Win_Malware_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Generic Windows malware mass-hunt rule - 2025
Reference:https://cyfare.net/
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/
Rule name:YahLover
Create hunting rule
Author:Kevin Falcoz
Description:YahLover

File information

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

Malspam

Formbook

Executable exe a21cea52a66cb02df71c42492bf7acf4d6393327fc9cfc20a7dbf246477df853

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/49080/

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