MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62. 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: 17


Intelligence 17 IOCs YARA 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62
SHA3-384 hash: fbe6f475013380a32b6cc1ccb7bda8cd95439f2ba7e4d16077ed762fe0493f051973faf17bad962a5b6d0f8ddd515f40
SHA1 hash: 8cf78fe13eaefed83d1b3d1d4daa175eba4f5bed
MD5 hash: 60e7b36ba97cb4789d7bdead3ce7f260
humanhash: steak-social-autumn-echo
File name:z13CVNicolasDuran.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'225'216 bytes
First seen:2025-08-05 21:30:16 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 3d95adbf13bbe79dc24dccb401c12091 (881 x AgentTesla, 737 x FormBook, 236 x SnakeKeylogger)
ssdeep 24576:itb20pkaCqT5TBWgNQ7a62IZ55LBFu02u/J/yKm6A:vVg5tQ7a6vZHu02Cyt5
Threatray 2'724 similar samples on MalwareBazaar
TLSH T17545D01273DD8365C3B25273BA267701AEBF782506B5F46B2FD8093DE920162521EB73
TrID 40.3% (.EXE) Win64 Executable (generic) (10522/11/4)
19.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
17.2% (.EXE) Win32 Executable (generic) (4504/4/1)
7.7% (.EXE) OS/2 Executable (generic) (2029/13)
7.6% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter FXOLabs
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
157
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
z13CVNicolasDuran.exe
Verdict:
No threats detected
Analysis date:
2025-08-05 21:32:16 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/bc283aaa-7467-4b63-a348-1fa178f51e3b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/19088/
Detection(s):
SecuriteInfo.com.PSW.Agent.BORA.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=689278061e8a59ee04e5fd9a
Tags:
autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Launching a process
Сreating synchronization primitives
Sending a custom TCP request
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context anti-debug autoit compiled-script fingerprint keylogger microsoft_visual_cc packed
Link:
https://www.filescan.io/uploads/689277fd397fd3ce6f9e38a9/reports/c11ba1d1-59cd-4dc1-a985-a4c2f1241791/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e0f62168-b81c-4bc1-9a19-e2a6040da12b
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62
Verdict:
Malware
YARA:
7 match(es)
Tags:
AutoIt Decompiled Executable PDB Path PE (Portable Executable) Suspect Win 32 Exe x86
Link:
https://app.malva.re/file/60e7b36ba97cb4789d7bdead3ce7f260
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62/
Verdict:
Malicious
Threat:
Trojan-Spy.Win32.Noon
Link:
https://tip.neiki.dev/file/c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62
Threat name:
Win32.Trojan.Kepavll
Create hunting rule
Status:
Malicious
First seen:
2025-08-05 14:24:53 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
25 of 37 (67.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zetnu5mnr37wrroh7aybfhhnmwbjp6aypc6akovvycorwvxsbrra._file
Verdict:
malicious
Label(s):
unc_loader_036
Create hunting rule
formbook
Create hunting rule
autoit
Create hunting rule
Similar samples:
6ae6baa3e8a078bd4ac1d387d45c3a069caa19b284fd55f22de95cbc47f44221
Formbook
7b210d6640552d12998eee72494c9560f1d626c9918c6abcbe9ec0c441c2bd0b
Formbook
901905df3e72235908f6f0c86ebfd965b35ec1ebbe5cab56607ed8b874c0246e
Formbook
b68daaa63d6f2935b3d341b2f665868ea568d2cfdce59d9440a830c34bd5e6fb
Formbook
c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62
Formbook
d8df74d6c66f0944491fab35e1682daa4061e4e51c19ffef86b434759961b990
Formbook
dadcc1aee3024cc0d05a344b128071fe566a63837ec3f2a4c24bc184c2c0c462
Formbook
df5b8d6a7a811ac7627a8dc7be72f00b5b335a0aff5bdeaaea315197866b0050
Formbook
error
Formbook
+ 2'714 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250805-1csgraywft/
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
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/1cea1274-ec1d-4994-9cb6-d2a00bcbc7aa
Unpacked files
SH256 hash:
c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62
MD5 hash:
60e7b36ba97cb4789d7bdead3ce7f260
SHA1 hash:
8cf78fe13eaefed83d1b3d1d4daa175eba4f5bed
Link:
https://www.unpac.me/results/b2200ac8-0043-4ea1-a4d4-0939dbd8fb11/
SH256 hash:
21f29bc3b043132b3d7919319cb73b1da85e946a485130c7737f343608aa4232
MD5 hash:
4dbd1af1f2e149f82154a56b64a932c4
SHA1 hash:
58a9b41387d53e1dcbe67dba8adc2d0aad4a4e4c
Link:
https://www.unpac.me/results/b2200ac8-0043-4ea1-a4d4-0939dbd8fb11/
SH256 hash:
8faebdddf13a4eb8c8cd90a06f3cd538b3a8f6cfd41bd2e6c9ce8bc0dc20b878
MD5 hash:
c36a1bd72b9282a4c389a6f42ad90264
SHA1 hash:
fecdb218a6e76437b45911b45a3f026d39afb6a9
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/b2200ac8-0043-4ea1-a4d4-0939dbd8fb11/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c926da758d8e/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62

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: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:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
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:YahLover
Create hunting rule
Author:Kevin Falcoz
Description:YahLover

File information

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

Malspam

Formbook

Executable exe c926da758d8eff68c5c7f830129ced658297f81878bc053ab5c09d1b56f20c62

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/19088/

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
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::AllocateAndInitializeSid
ADVAPI32.dll::CopySid
ADVAPI32.dll::FreeSid
ADVAPI32.dll::GetLengthSid
ADVAPI32.dll::GetTokenInformation
ADVAPI32.dll::GetAce
COM_BASE_APICan Download & Execute componentsole32.dll::CLSIDFromProgID
ole32.dll::CoCreateInstance
ole32.dll::CoCreateInstanceEx
ole32.dll::CoInitializeSecurity
ole32.dll::CreateStreamOnHGlobal
MULTIMEDIA_APICan Play MultimediaWINMM.dll::mciSendStringW
WINMM.dll::timeGetTime
WINMM.dll::waveOutSetVolume
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AddAce
ADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::CheckTokenMembership
ADVAPI32.dll::DuplicateTokenEx
ADVAPI32.dll::GetAclInformation
ADVAPI32.dll::GetSecurityDescriptorDacl
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
WIN32_PROCESS_APICan Create Process and ThreadsADVAPI32.dll::CreateProcessAsUserW
KERNEL32.dll::CreateProcessW
ADVAPI32.dll::CreateProcessWithLogonW
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
ADVAPI32.dll::OpenThreadToken
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::SetSystemPowerState
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetDriveTypeW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateHardLinkW
IPHLPAPI.DLL::IcmpCreateFile
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameW
ADVAPI32.dll::GetUserNameW
ADVAPI32.dll::LogonUserW
ADVAPI32.dll::LookupPrivilegeValueW
WIN_NETWORK_APISupports Windows NetworkingMPR.dll::WNetAddConnection2W
MPR.dll::WNetUseConnectionW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegConnectRegistryW
ADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::BlockInput
USER32.dll::CloseDesktop
USER32.dll::CreateMenu
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::FindWindowW

Comments