MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe. 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 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe
SHA3-384 hash: 24c477e1aa6a3538e87eb84abfcfb8a4f966f9a71d6298602746d0c84b770623c52d8139972ec0cc4d8efd6f64560cce
SHA1 hash: 29e03270fdc56ddc8b04e3fc6706ef9c33ef025f
MD5 hash: 4b27c550d68502d4537fa3ec3d1d42da
humanhash: twenty-bulldog-nuts-uranus
File name:6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'202'176 bytes
First seen:2025-08-12 14:10:46 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 3d95adbf13bbe79dc24dccb401c12091 (881 x AgentTesla, 737 x FormBook, 236 x SnakeKeylogger)
ssdeep 24576:Ptb20pkaCqT5TBWgNQ7agp+4YDN/21QanbMCrS6A:MVg5tQ7agpPYDN+1QobQ5
Threatray 2'725 similar samples on MalwareBazaar
TLSH T1F545CF1273DEC361C3B25273BA29B741AEBF782506B1F56B2FD4093DE920162521E673
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
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
34
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SMTP[1].eml.tgz
Verdict:
Malicious activity
Analysis date:
2025-07-22 05:07:09 UTC
Tags:
arch-doc arch-email attachments attc-arch arch-exec
Link:
https://app.any.run/tasks/993a5376-6861-4178-83e2-f0baf92e0da4

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/20546/
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=689b4d47c633abe3908e4d0e
Tags:
autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Launching a process
Сreating synchronization primitives
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context autoit cmdkey compiled-script fingerprint keylogger lolbin microsoft_visual_cc obfuscated packed packed packer_detected reg threat wscript
Link:
https://www.filescan.io/uploads/689b58c733ecf0a15b75d632/reports/40d6549b-7c7b-4051-9451-61f8d08cb0c7/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1d4840b7-5683-4282-b40a-bb174acaa15e
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe/
Verdict:
Malicious
Threat:
Trojan-Spy.Win32.Noon
Link:
https://tip.neiki.dev/file/6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-07-22 07:20:02 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=my4njfjh4rqf76qsc6hpg5kmubn3c25fse2jbmnmt2ceev2m7h7a._file
Verdict:
malicious
Label(s):
autoit
Create hunting rule
unc_loader_036
Create hunting rule
formbook
Create hunting rule
Similar samples:
0b52343e4d7786078faf221eb5f823a84fbda7254787c27134494bcda2b90d08
Formbook
6a344171327d9bcf3eb5c258df9611e173d97bfa07b6784846b2ce7f65ab5329
Formbook
bdc789c28c1690bb59536cd4739e63644811f849591d6fb3ad40639be9671a60
Formbook
dadcc1aee3024cc0d05a344b128071fe566a63837ec3f2a4c24bc184c2c0c462
Formbook
f2c7e3f9eac170b391e2ad8002d482a021c085f0f98eb7507da9653a9c63f960
Formbook
+ 2'715 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250812-sgbe2a1qy5/
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
AutoIT Executable
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/37ae761c-c465-4f89-8a21-eeb60f571bae
Unpacked files
SH256 hash:
6638d49527e4605ffa12178ef3754ca05bb16ba5913490b1ac9e8442574cf9fe
MD5 hash:
4b27c550d68502d4537fa3ec3d1d42da
SHA1 hash:
29e03270fdc56ddc8b04e3fc6706ef9c33ef025f
Link:
https://www.unpac.me/results/237ce90e-9b56-4b2e-8087-88f552d109b9/
SH256 hash:
3f484fffa410c41beeaba45c1e64be007816314151cd9ff9fef9be69a0def040
MD5 hash:
fb014c0e4eb733231dd1d0fb0c9d103e
SHA1 hash:
17ea69bdde952c737c3d29386c67a262356c1c6c
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/237ce90e-9b56-4b2e-8087-88f552d109b9/
Parent samples :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 hash:
7dad7a11cc166ea0e47e462f752469c9dfb3147c49210d7bacec38d162d52efa
MD5 hash:
68088d494e5c3033f5acba7ec51b20dd
SHA1 hash:
9a574f98cad09269dac4d84f64855540f3946837
Link:
https://www.unpac.me/results/237ce90e-9b56-4b2e-8087-88f552d109b9/
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: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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Formbook
Create hunting rule
Author:kevoreilly
Description:Formbook Payload
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:MoleBoxv20
Create hunting rule
Author:malware-lu
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: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:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
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.

Cape
Cape
https://www.capesandbox.com/analysis/20546/

Comments