MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef
SHA3-384 hash: 7c9c8bed6435261dc5b804802fd4a0cc9fae117728a9f976a916096270b718575ffb6a516d37334aaf0a8accdecdda9d
SHA1 hash: 10155bb65941a036e19e306c2077e407573efaac
MD5 hash: bd4c366a9a645df54f984d667969e095
humanhash: delaware-dakota-mobile-april
File name:rIMG-8838375353.scr
Download: download sample
Signature Formbook
Create hunting rule
File size:107'520 bytes
First seen:2025-04-22 14:30:06 UTC
Last seen:2025-05-09 13:26:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'610 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 3072:lZK8yZC9NOaWqPIlVRH8Gksut4GmFYrYK7pbD/iqW0uc3:lZK8yZC9NOaWqPI7MHt4GLrY+x
Threatray 2'954 similar samples on MalwareBazaar
TLSH T111B33A349798CB53C5AC5AB99872131003F5DD9AA812FB9B9D94B0E81C733962B3317F
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 0c230903031d3102 (1 x Formbook)
Reporter FXOLabs
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
485
Origin country :
BR BR
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/3422/
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.18192.8424.UNOFFICIAL
Create hunting rule

Verdict:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6807a8ae3d067f8483980193
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Connection attempt to an infection source
DNS request
Connection attempt
Sending an HTTP GET request
Launching a process
Query of malicious DNS domain
Sending a TCP request to an infection source
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1f5faf3f-57ff-4b8d-b4ad-9249438c007c
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1671098
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
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
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)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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 Costura Assembly Loader
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1671098 Sample: rIMG-8838375353.scr.exe Startdate: 22/04/2025 Architecture: WINDOWS Score: 100 29 www.globedesign.xyz 2->29 31 www.poradnikzdrowie.pl 2->31 33 15 other IPs or domains 2->33 45 Suricata IDS alerts for network traffic 2->45 47 Antivirus detection for URL or domain 2->47 49 Multi AV Scanner detection for submitted file 2->49 53 6 other signatures 2->53 10 rIMG-8838375353.scr.exe 15 2 2->10         started        signatures3 51 Performs DNS queries to domains with low reputation 29->51 process4 dnsIp5 41 www.new.eventawardsrussia.com 5.23.51.54, 443, 49710 TIMEWEB-ASRU Russian Federation 10->41 65 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 10->65 67 Writes to foreign memory regions 10->67 69 Injects a PE file into a foreign processes 10->69 14 RegAsm.exe 10->14         started        signatures6 process7 signatures8 71 Maps a DLL or memory area into another process 14->71 17 mtJ84WB3FawP2G.exe 14->17 injected process9 signatures10 43 Found direct / indirect Syscall (likely to bypass EDR) 17->43 20 choice.exe 13 17->20         started        process11 signatures12 55 Tries to steal Mail credentials (via file / registry access) 20->55 57 Tries to harvest and steal browser information (history, passwords, etc) 20->57 59 Modifies the context of a thread in another process (thread injection) 20->59 61 3 other signatures 20->61 23 mtJ84WB3FawP2G.exe 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 35 busamed.shop 84.32.84.32, 49748, 49749, 49750 NTT-LT-ASLT Lithuania 23->35 37 www.mellowzap.site 209.74.89.230, 49724, 49725, 49726 MULTIBAND-NEWHOPEUS United States 23->37 39 9 other IPs or domains 23->39 63 Found direct / indirect Syscall (likely to bypass EDR) 23->63 signatures15
Score:
97%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Suspicious
First seen:
2025-04-22 10:02:37 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wznzgefshia5n73bfmurmqougbiuofoy2xsb66xoereznrmcxlxq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
23f3fa13fed8d33521bc976a1c9d8f892b19370815226e5017065d4d3354f5b0
Formbook
274f7fce4c151cafe885aec57b38f696a3c4f0f9d275593603c3ae55f6667bed
Formbook
597f85e07140fd0564539538b3013a27ae2ef80f5ca86ecf2968cbcd0453fa93
Formbook
5afa82f99cbc39a07652a0ca4e3e8b617381f8d01c07313013ac3cd48076dc4f
Formbook
5ba5b497dbcc61daee892b8dce771c50d47741cb374a8f2fb2a9b95c03efb56d
Formbook
633fab421c431bf0c98270e6706420cb9945195e17f1a5a2ddcaaf6c56287bde
Formbook
71fcb77dc307104eb0c9365b86f690c64d48dba6f23057e2fdfb9e31f9b6a11a
Formbook
b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef
Formbook
ddcb6ff5ce9cd75b9b7457b787b165000fab3bf4441509d5a1394983dd0bcbcc
Formbook
error
Formbook
+ 2'944 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  3/10
Tags:
discovery
Link:
https://tria.ge/reports/250422-rvda4sxzes/
Behaviour
Suspicious use of AdjustPrivilegeToken
System Location Discovery: System Language Discovery
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c33a39f3-6b11-4239-9e3c-f741732ee64e
Unpacked files
SH256 hash:
b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef
MD5 hash:
bd4c366a9a645df54f984d667969e095
SHA1 hash:
10155bb65941a036e19e306c2077e407573efaac
Detections:
PureCrypter_Stage1
Create hunting rule
Link:
https://www.unpac.me/results/414b3c52-4b7d-4bb0-bfb1-de03eeb7d9d9/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b65b9310b23a/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/b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef

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:Lumma_Stealer_Detection
Create hunting rule
Author:ashizZz
Description:Detects a specific Lumma Stealer malware sample using unique strings and behaviors
Reference:https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
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

File information

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

Malspam

Formbook

Executable exe b65b9310b23a01d6ff612b291641d430514715d8d5e41f7aee244996c582baef

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/3422/

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 (GUARD_CF)high

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