MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8c08b0259eb8101f49c2a307eea7f6ca2776f74aa04a2567ab54430c6cf7d699. 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: 8


Intelligence 8 IOCs YARA 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8c08b0259eb8101f49c2a307eea7f6ca2776f74aa04a2567ab54430c6cf7d699
SHA3-384 hash: ff873a06f0b34ddc087169c04d76b01993dd76f80bafa562f9a5e59eaf66c920ce149b7d158f1eae43801322c7ef1efd
SHA1 hash: f028faf276b7022ab14118338fbec1ffbdcbf13a
MD5 hash: a3137ea629557a2c61312c3ad05225f9
humanhash: east-harry-fillet-indigo
File name:Transfer confirmation.gz
Download: download sample
Signature Formbook
Create hunting rule
File size:716'282 bytes
First seen:2025-08-27 09:09:01 UTC
Last seen:2025-08-27 09:12:57 UTC
File type: gz
MIME type:application/x-rar
ssdeep 12288:b3Pr/cKYw/haahBR3zlkt1UrjXMx6deGdwOiLbe2l0FKzdT7jejupzpruFy:zPDnEapzlzmrGwPv7zR/yuFcFy
TLSH T1C2E4236A53373E2250FA5B9C5DA7A4F7540F47A8F3E13142A3633D9B0207D46D82EBA1
TrID 61.5% (.RAR) RAR compressed archive (v5.0) (8000/1)
38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Magika rar
Reporter cocaman
Tags:FormBook gz


Avatar
cocaman
Malicious email (T1566.001)
From: "Enya Cai <enya.cai@eiffguz.com.cn>" (likely spoofed)
Received: "from eiffguz.com.cn (unknown [172.245.23.154]) "
Date: "19 Aug 2025 12:10:55 +0200"
Subject: "=?UTF-8?B?5Zue6KaGOiBSZTogQ29uZmlybWHDp8OjbyBkZSB0cmFuc2ZlcsOqbmNpYQ==?="
Attachment: "Transfer confirmation.gz"

Intelligence

File Origin
# of uploads :
2
# of downloads :
44
Origin country :
CH CH
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:Transfer confirmation.exe
File size:1'244'160 bytes
SHA256 hash: 18082263ea483e29b2c7a346f29f4ff19a841f6b3e0d47cd4790198d5941a57f
MD5 hash: b62decb7ea04d1f318a9fcda19495501
MIME type:application/x-dosexec
Signature Formbook
Vendor Threat Intelligence
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68ad7ad43e988eb6ab82bd19
Tags:
underscore autoit emotet
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug anti-vm anti-vm autoit compiled-script cscript fingerprint keylogger lolbin microsoft_visual_cc packed reg threat wscript
Link:
https://www.filescan.io/uploads/68aecb5b6212e2f74263a56c/reports/920105bb-67d2-4b38-9cad-5dd7e6bfcc74/overview
Verdict:
Malicious
Labled as:
Trojan.Downloader
Link:
https://www.hybrid-analysis.com/sample/8c08b0259eb8101f49c2a307eea7f6ca2776f74aa04a2567ab54430c6cf7d699
Verdict:
Malicious
File Type:
rar
First seen:
2025-08-19T15:55:00Z UTC
Last seen:
2025-08-19T15:55:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/8c08b0259eb8101f49c2a307eea7f6ca2776f74aa04a2567ab54430c6cf7d699/results?tab=lookup
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8c08b0259eb8101f49c2a307eea7f6ca2776f74aa04a2567ab54430c6cf7d699/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-08-19 10:26:48 UTC
File Type:
Binary (Archive)
Extracted files:
29
AV detection:
24 of 38 (63.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rqelajm6xaib6socumd65j7wzitxn52kubfckz5lkrbqy3hx22mq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250827-labc5ayjx5/
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
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/8c08b0259eb8101f49c2a307eea7f6ca2776f74aa04a2567ab54430c6cf7d699

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_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: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_detect_tls_callbacks
Create hunting rule
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: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)

File information

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

Malspam

Formbook

gz 8c08b0259eb8101f49c2a307eea7f6ca2776f74aa04a2567ab54430c6cf7d699

(this sample)

Formbook

Executable exe 18082263ea483e29b2c7a346f29f4ff19a841f6b3e0d47cd4790198d5941a57f

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 18082263ea483e29b2c7a346f29f4ff19a841f6b3e0d47cd4790198d5941a57f
  
Dropping
Formbook
  
Dropping
MD5 b62decb7ea04d1f318a9fcda19495501

Comments