MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e
SHA3-384 hash: 1878778e2f800d31299f95860a7014e2b74dadb853ed354fccdf3edcfc8e15bed3e5172ab93b9465b50ef1b82f91bc2b
SHA1 hash: 4493ad3671f923397195fcbef715ecc405a45ea6
MD5 hash: f64ade30b5f83b35e17eac97621bb4f7
humanhash: ink-utah-alpha-bluebird
File name:f64ade30b5f83b35e17eac97621bb4f7
Download: download sample
Signature Formbook
Create hunting rule
File size:884'232 bytes
First seen:2025-04-23 06:42:57 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:gXLCsvxvUsQ2RiUBHdR1c0OZbdHWRmhkKs9MZ9D:gXLCsvSh2QUBIrHphr
Threatray 12 similar samples on MalwareBazaar
TLSH T14915F049C945CAE5FE5536F81421F732C2A19D8A991D87979BF8BFEFB8302503E0B148
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
dhash icon b130fcd2d2d830a3 (6 x Formbook, 2 x RemcosRAT, 2 x njrat)
Reporter Anonymous
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
444
Origin country :
US US
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
f64ade30b5f83b35e17eac97621bb4f7
Verdict:
Malicious activity
Analysis date:
2025-04-23 06:45:41 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/bff3a15e-a6d2-4fd7-b8d7-0b08a2f0e7d7

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/3573/
Detection(s):
Win.Malware.Generic-9957321-0
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68088e66a37ff28e12986d27
Tags:
virus spawn shell
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
entropy expired-cert invalid-signature obfuscated packed packed packer_detected signed
Link:
https://www.filescan.io/uploads/68088bffe9c1e25797a04cfa/reports/f3509406-465f-436e-9adf-fbc9baa6fd5e/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/27bd3722-85e1-4121-aee0-c33c76b35259
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1671694
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
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)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1671694 Sample: YWrNXeNdt1.exe Startdate: 23/04/2025 Architecture: WINDOWS Score: 100 39 www.splogi.xyz 2->39 41 www.moonavatar.xyz 2->41 43 17 other IPs or domains 2->43 53 Suricata IDS alerts for network traffic 2->53 55 Antivirus detection for URL or domain 2->55 57 Antivirus / Scanner detection for submitted sample 2->57 61 6 other signatures 2->61 10 YWrNXeNdt1.exe 4 2->10         started        signatures3 59 Performs DNS queries to domains with low reputation 41->59 process4 file5 37 C:\Users\user\AppData\...\YWrNXeNdt1.exe.log, ASCII 10->37 dropped 65 Writes to foreign memory regions 10->65 67 Allocates memory in foreign processes 10->67 69 Adds a directory exclusion to Windows Defender 10->69 71 Injects a PE file into a foreign processes 10->71 14 RegSvcs.exe 10->14         started        17 powershell.exe 23 10->17         started        19 RegSvcs.exe 10->19         started        signatures6 process7 signatures8 81 Maps a DLL or memory area into another process 14->81 21 hLgRfOceHfBd5NbtBEa.exe 14->21 injected 83 Loading BitLocker PowerShell Module 17->83 24 WmiPrvSE.exe 17->24         started        26 conhost.exe 17->26         started        process9 signatures10 63 Found direct / indirect Syscall (likely to bypass EDR) 21->63 28 finger.exe 13 21->28         started        process11 signatures12 73 Tries to steal Mail credentials (via file / registry access) 28->73 75 Tries to harvest and steal browser information (history, passwords, etc) 28->75 77 Modifies the context of a thread in another process (thread injection) 28->77 79 3 other signatures 28->79 31 hLgRfOceHfBd5NbtBEa.exe 28->31 injected 35 firefox.exe 28->35         started        process13 dnsIp14 45 zcdn.8383dns.com 134.122.135.54, 49712, 49713, 49714 BCPL-SGBGPNETGlobalASNSG United States 31->45 47 an05-prod-v.cdn-ng.net 43.251.56.78, 49699, 49700, 49702 WSN-TW-NET-ASWorldstarNetworkTW Taiwan; Republic of China (ROC) 31->47 49 7 other IPs or domains 31->49 51 Found direct / indirect Syscall (likely to bypass EDR) 31->51 signatures15
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2025-03-19 08:40:42 UTC
File Type:
PE (.Net Exe)
Extracted files:
22
AV detection:
26 of 36 (72.22%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7nfflvvcmkwdxg2ptxm74igonhcxfwygy2moduoc7rvttkvq6gpa._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
formbook
Create hunting rule
Similar samples:
0bcc9139f97f4f59ca400cd44f8012cf9a66fa3cb803f6fd35fc780df3e562af
Formbook
159b534ea3ff22efd020768a9e5bb7d2766cc9d3b0e483bbc74e59009c92aa8f
Formbook
27dd23efd90b1b2f43eafb08729de73c023cf1de18eb829a409088cb410428c0
Formbook
3b5893af84e478f126cbcee3c73bfb8edb25be9e9ec4f588fc7d8244d2d2a09e
Formbook
5a962362db0425ef6552d920519cacfae4fe3f86e8537fae95e44dcb6d1ad981
Formbook
error
Formbook
fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e
Formbook
+ 2 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery execution
Link:
https://tria.ge/reports/250423-hgyv8atmw5/
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
Verdict:
Malicious
Tags:
Win.Malware.Generic-9957321-0
YARA:
n/a
Link:
https://app.threat.zone/submission/3280cf17-6b20-4586-a79e-8fca52b918e9
Unpacked files
SH256 hash:
fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e
MD5 hash:
f64ade30b5f83b35e17eac97621bb4f7
SHA1 hash:
4493ad3671f923397195fcbef715ecc405a45ea6
Link:
https://www.unpac.me/results/be31cc19-ca0a-48b7-9ce8-cfbad9f2a093/
SH256 hash:
294404bf505625ac56ff8c2439448bd42afc8ad9497d91500f874422dbb0296a
MD5 hash:
33bb124c5078191679efc52f6a8cee62
SHA1 hash:
0ba3af69043e7b80e852908e07109706d0b47298
Link:
https://www.unpac.me/results/be31cc19-ca0a-48b7-9ce8-cfbad9f2a093/
SH256 hash:
792109905d2d4b7886a543a7d441b6d83d20f1e44fe9f971bfd449ddb1b3fcd4
MD5 hash:
d1e1757bd87e4e81b2345306bb26956f
SHA1 hash:
536e20253b616fae3bebcf9244f2b9177193161b
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/be31cc19-ca0a-48b7-9ce8-cfbad9f2a093/
SH256 hash:
4acab68ccafb820c5e10df6d5381552a79d973d47080eadef3656b3e635b1e42
MD5 hash:
d4fb4fe1a86e5169bd119d278ea07355
SHA1 hash:
d257a40b7ad0f481d5d3108378dc3205a8b14d19
Link:
https://www.unpac.me/results/be31cc19-ca0a-48b7-9ce8-cfbad9f2a093/
SH256 hash:
d4a589d03e953b8d187e1e6866c64e50afda2c5ec48bc0ab5797a3b89344951e
MD5 hash:
0c8bac09783c557e776794c19d5b2d80
SHA1 hash:
ac8987efe0703ae54fcee7e0b83a399603830dcc
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/be31cc19-ca0a-48b7-9ce8-cfbad9f2a093/
Parent samples :
3b5893af84e478f126cbcee3c73bfb8edb25be9e9ec4f588fc7d8244d2d2a09e
fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fb4a55d6a262/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/fb4a55d6a262ac3b9b4f9dd9fe20ce69c572db06c698e1d1c2fc6b39aab0f19e

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:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
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.

Cape
Cape
https://www.capesandbox.com/analysis/3573/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments