MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37. 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: 20


Intelligence 20 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37
SHA3-384 hash: 630c62b1d28a0b061970b7670e32555a316d7b4dee78f0306fca75a2448240494d81790b944ec3414f23f0c7867dc1fa
SHA1 hash: 6a62251d594264743c741e148ead452be61f4e5d
MD5 hash: 87811d55d14abf01a5f7d34294e607d6
humanhash: red-india-pizza-alpha
File name:QUOTE-065.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'223'168 bytes
First seen:2025-09-11 07:40:54 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'476 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:VdD9Ol06bTvuLpiwnN4P95i2w9JnDzXEQaEQCEQmEQqEQ:Ea6bTvZmIK2w9JnDTjajCjmjqj
Threatray 1'056 similar samples on MalwareBazaar
TLSH T16845F10076A3D927C13692B109B2C6791B7A6FFC7032E38ADED56E9B36F1B141B41613
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
127
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
QUOTE-065.exe
Verdict:
Malicious activity
Analysis date:
2025-09-11 08:13:40 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/08f884de-e67d-474a-a684-0b75b8342df4

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/26868/
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68c27d13b20052598879b6c8
Tags:
shell virus remo
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Sending a custom TCP request
Сreating synchronization primitives
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 bitmap lolbin msbuild obfuscated packed packed reconnaissance regsvcs rezer0 roboski schtasks stego vbc zero
Link:
https://www.filescan.io/uploads/68c27d1f7328794829267a8c/reports/081046e6-bb2d-4196-9690-4d8064b72a42/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-10T12:55:00Z UTC
Last seen:
2025-09-10T12:55:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/983fb036-6070-4136-b413-b4b063feb30b
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1775433
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
Changes security center settings (notifications, updates, antivirus, firewall)
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 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
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)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1775433 Sample: QUOTE-065.exe Startdate: 11/09/2025 Architecture: WINDOWS Score: 100 46 www.runefi.xyz 2->46 48 www.raginput.xyz 2->48 50 19 other IPs or domains 2->50 74 Suricata IDS alerts for network traffic 2->74 76 Multi AV Scanner detection for submitted file 2->76 78 Yara detected FormBook 2->78 82 5 other signatures 2->82 10 QUOTE-065.exe 4 2->10         started        14 svchost.exe 1 1 2->14         started        signatures3 80 Performs DNS queries to domains with low reputation 48->80 process4 dnsIp5 44 C:\Users\user\AppData\...\QUOTE-065.exe.log, ASCII 10->44 dropped 84 Adds a directory exclusion to Windows Defender 10->84 17 QUOTE-065.exe 10->17         started        20 powershell.exe 23 10->20         started        22 svchost.exe 10->22         started        24 QUOTE-065.exe 10->24         started        58 127.0.0.1 unknown unknown 14->58 file6 signatures7 process8 signatures9 60 Maps a DLL or memory area into another process 17->60 26 m4xZJ166zNuyC7.exe 17->26 injected 62 Loading BitLocker PowerShell Module 20->62 28 WmiPrvSE.exe 20->28         started        30 conhost.exe 20->30         started        64 Changes security center settings (notifications, updates, antivirus, firewall) 22->64 32 MpCmdRun.exe 2 22->32         started        process10 process11 34 replace.exe 13 26->34         started        37 conhost.exe 32->37         started        signatures12 66 Tries to steal Mail credentials (via file / registry access) 34->66 68 Tries to harvest and steal browser information (history, passwords, etc) 34->68 70 Modifies the context of a thread in another process (thread injection) 34->70 72 3 other signatures 34->72 39 ZYzw37cbjtFu.exe 34->39 injected 42 firefox.exe 34->42         started        process13 dnsIp14 52 www.jorvia.site 203.161.58.88, 49722, 49723, 49724 VNPT-AS-VNVNPTCorpVN Malaysia 39->52 54 8m1.xyz 173.0.157.187, 49734, 49735, 49736 SERVERS-COMUS United States 39->54 56 10 other IPs or domains 39->56
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.31 Win 32 Exe x86
Link:
https://app.malva.re/file/87811d55d14abf01a5f7d34294e607d6
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37/
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2025-09-10 18:42:35 UTC
File Type:
PE (.Net Exe)
Extracted files:
43
AV detection:
28 of 38 (73.68%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qg22uu73buoz5gnbirbhmfzncfogzhpjbfkkwaxw4kn653nfdi3q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unc_loader_037
Create hunting rule
Similar samples:
1da6708a65f8dfe0c3359c8aa3fd07387c7aed37af8c66e5a5a0893aab14f547
Formbook
38c7e35b5c3ffd6988ed96a7edf1bfab263257f08740550324500b7f776e0de1
Formbook
59452e6856b4aacd74c22b641a883b4aa2fc67a6aa2a0d8d95934ba2ff9288a2
Formbook
81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37
Formbook
a4e1ceb8458e0bca4119adb33ded5b1ef154f0ba69594b2079fbbcfb48cbe4ce
Formbook
bb8b6590ca5c65bf55bb227ac601636414ec7c1fa1f9a603840f57e45f8f8994
Formbook
decdb74ebd6bcdf8e64941b717e7830a401490f3d37437cc2110afcbc64d6606
Formbook
e1fe0b9026bf4452a4f6d0a21af6c38e151fe5f1a8c6b547074798c25915456f
Formbook
error
Formbook
+ 1'046 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/250911-jh3q8san4y/
Behaviour
Suspicious behavior: EnumeratesProcesses
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
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/4b0b2953-3175-4b5f-80d0-7172d3c314ac
Unpacked files
SH256 hash:
81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37
MD5 hash:
87811d55d14abf01a5f7d34294e607d6
SHA1 hash:
6a62251d594264743c741e148ead452be61f4e5d
Link:
https://www.unpac.me/results/e7cf0921-24f8-4f8a-8b6c-15e51f5dbbd4/
SH256 hash:
b65791de458a248d113a9a7050b54ec4574379d6718f720acff7934b0a01cdb5
MD5 hash:
07ee8ab98e32b701a2825202108a0703
SHA1 hash:
2592c2eab3123c44d0f38babb75fd56c2ff0fcc0
Link:
https://www.unpac.me/results/e7cf0921-24f8-4f8a-8b6c-15e51f5dbbd4/
SH256 hash:
7e238afab950d9daca9b02866a7b5c1b06718834c54b2dbfe09563a2bc26dcbb
MD5 hash:
cba57b6ab45532487bed303d8ddedca0
SHA1 hash:
323a89043f5b7c29c21e9c02f258022c71ee98ca
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/e7cf0921-24f8-4f8a-8b6c-15e51f5dbbd4/
SH256 hash:
0fd8fbd3f9fea94bbfaa61d0b25e4d7e1f624338912296a8cd05fad3de6f7b64
MD5 hash:
c74b415bb180764d6b8031cec0cebe45
SHA1 hash:
ce2b7b025b572f8d797aee799d74f9bdee553fd7
Link:
https://www.unpac.me/results/e7cf0921-24f8-4f8a-8b6c-15e51f5dbbd4/
SH256 hash:
f0cb55f264ecd2e074276bac9bb05156d4c1e9d0c7c32731ca0eab8e56cf8a93
MD5 hash:
652dc3ea284ef5640b37e3d3d844e440
SHA1 hash:
3b6aa4a5591245f8260304d65f5f7c2c6d175314
Link:
https://www.unpac.me/results/e7cf0921-24f8-4f8a-8b6c-15e51f5dbbd4/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/81b5aa53fb0d/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/81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37

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: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: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: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

Executable exe 81b5aa53fb0d1d9e99a1444276172d115c6c9de90954ab02f6e29beeeda51a37

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/26868/

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