MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6. 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: 12


Intelligence 12 IOCs YARA 15 File information Comments
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SHA256 hash: 23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6
SHA3-384 hash: 237324ed96bf8cd0893e93339b24728d16f6afbb22a34046998c2b5a03ce68aab3cfc9c3120c5432150d9123670d5d22
SHA1 hash: 4fb3217f38baa329c71d4cd3782d0410492977d2
MD5 hash: a5872114a74b20f6cc8da480f12d6899
humanhash: charlie-beryllium-oxygen-floor
File name:liblzma-5.dll
Download: download sample
Signature Formbook
Create hunting rule
File size:3'467'264 bytes
First seen:2025-05-19 09:12:20 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f54d88439b32bbd9e5bae81e83ce25aa (1 x AgentTesla, 1 x Formbook)
ssdeep 49152:y0Eb0X6RqpXzOL8aODkaD67bTq/vAqyOpktoKV:P9pXZpDATGiOO
TLSH T1EFF5BE1593A404B5D83BCB38CA668333D6B0BD965731D14F0A99E6052F73EA29B3F316
TrID 48.7% (.EXE) Win64 Executable (generic) (10522/11/4)
23.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
9.3% (.EXE) OS/2 Executable (generic) (2029/13)
9.2% (.EXE) Generic Win/DOS Executable (2002/3)
9.2% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
461
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
liblzma-5.dll
Verdict:
No threats detected
Analysis date:
2025-05-19 09:20:59 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/19edddd4-fb8d-4b9d-8335-33d2afa908a4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win64.MalwareX-gen.22876.12363.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=682af63ce5aa44ec2e1ae5c0
Tags:
malware
Result
Verdict:
Clean
Maliciousness:
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context crypto fingerprint masquerade microsoft_visual_cc packed packed packer_detected
Link:
https://www.filescan.io/uploads/682af639c609634bd7c8b9b8/reports/e814c8b7-c016-4236-94e9-4d7ef8127a7d/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6
Malware family:
Rhadamanthys
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/f87c8cc9-e178-4e16-9d5b-64b7e27ab370
Result
Threat name:
n/a
Detection:
malicious
Classification:
n/a
Score:
52 / 100
Link:
https://www.joesandbox.com/analysis/1693856
Signature
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1693856 Sample: liblzma-5.dll.exe Startdate: 19/05/2025 Architecture: WINDOWS Score: 52 34 Multi AV Scanner detection for submitted file 2->34 36 Joe Sandbox ML detected suspicious sample 2->36 8 loaddll64.exe 1 2->8         started        process3 process4 10 cmd.exe 1 8->10         started        12 rundll32.exe 1 8->12         started        14 rundll32.exe 1 8->14         started        16 35 other processes 8->16 process5 18 rundll32.exe 1 10->18         started        20 conhost.exe 12->20         started        22 conhost.exe 14->22         started        24 conhost.exe 16->24         started        26 conhost.exe 16->26         started        28 conhost.exe 16->28         started        30 31 other processes 16->30 process6 32 conhost.exe 18->32         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6/
Threat name:
Win64.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-05-16 19:28:41 UTC
File Type:
PE+ (Dll)
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ep3wipekfkz3ukil6tnb4nhg2xz77mdxpopurtngz7erptuukl3a._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/250519-k6z6padn4z/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Checks computer location settings
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/d8fc89c2-c240-4fab-b49d-6188926bf329
Unpacked files
SH256 hash:
23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6
MD5 hash:
a5872114a74b20f6cc8da480f12d6899
SHA1 hash:
4fb3217f38baa329c71d4cd3782d0410492977d2
Link:
https://www.unpac.me/results/d133ff98-6e34-4846-9dd7-146128566d0c/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/23f7643c8a2a/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/23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
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:NET
Create hunting rule
Author:malware-lu
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)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

File information

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

Malspam

Formbook

Executable exe 23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments