MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c. 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: 14


Intelligence 14 IOCs YARA 16 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c
SHA3-384 hash: ecc874b97601c69bb48bdc275c3868370aa5138219361c5de00ae2ec1fdf20c149503cf44c69254fb112f2e1ed463080
SHA1 hash: 91a4284ff14d31908079f87150e2b7456310d8fe
MD5 hash: 5b3383df0b033c0401892c1d6109f704
humanhash: potato-skylark-bacon-crazy
File name:5b3383df0b033c0401892c1d6109f704.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'205'760 bytes
First seen:2024-06-09 15:57:39 UTC
Last seen:2024-06-09 16:22:48 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash afcdf79be1557326c854b6e20cb900a7 (1'102 x FormBook, 936 x AgentTesla, 399 x RemcosRAT)
ssdeep 24576:YAHnh+eWsN3skA4RV1Hom2KXMmHa/ceoHYEdYxvc95:fh+ZkldoPK8Ya/ce0YEdYY
Threatray 27 similar samples on MalwareBazaar
TLSH T17645BD0273D1D036FFABA2739B6AF60156BD7C254123852F13981DB9BD701B2263E663
TrID 63.7% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
11.6% (.EXE) Win64 Executable (generic) (10523/12/4)
7.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
5.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.9% (.EXE) Win32 Executable (generic) (4504/4/1)
File icon (PE):PE icon
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
326
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c.exe
Verdict:
Malicious activity
Analysis date:
2024-06-09 16:09:47 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/f7f07e69-7930-4a07-b239-4f6e81d4ad8e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.Trojan-Stealer.FormBook.1MJBL1.5142.500.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6667049ba439c6d6b08749dewin7simulatehigh_evasion
Tags:
Encryption Network Malware
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a file
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
autoit epmicrosoft_visual_cc fingerprint keylogger lolbin microsoft_visual_cc packed shell32
Link:
https://www.filescan.io/uploads/6665d10d6be3b3c7c23382e3/reports/9ce97a93-6b12-4329-8193-19fb34bc0bd7/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/fa7878f0-9392-48d7-ac12-97095ae987dd
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1454254
Signature
AI detected suspicious sample
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Creates executable files without a name
Drops VBS files to the startup folder
Found direct / indirect Syscall (likely to bypass EDR)
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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 FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1454254 Sample: wOoESPII08.exe Startdate: 09/06/2024 Architecture: WINDOWS Score: 100 35 www.joyesi.xyz 2->35 37 www.magmadokum.com 2->37 39 19 other IPs or domains 2->39 55 Malicious sample detected (through community Yara rule) 2->55 57 Antivirus detection for URL or domain 2->57 59 Multi AV Scanner detection for submitted file 2->59 63 4 other signatures 2->63 11 wOoESPII08.exe 6 2->11         started        signatures3 61 Performs DNS queries to domains with low reputation 35->61 process4 file5 31 C:\Users\user\AppData\Local\directory\.exe, PE32 11->31 dropped 77 Binary is likely a compiled AutoIt script file 11->77 79 Creates executable files without a name 11->79 15 .exe 3 11->15         started        signatures6 process7 file8 33 C:\Users\user\AppData\Roaming\...\Startup.vbs, data 15->33 dropped 47 Multi AV Scanner detection for dropped file 15->47 49 Binary is likely a compiled AutoIt script file 15->49 51 Machine Learning detection for dropped file 15->51 53 3 other signatures 15->53 19 svchost.exe 15->19         started        signatures9 process10 signatures11 65 Maps a DLL or memory area into another process 19->65 22 UVefVzJVLUZfGHLB.exe 19->22 injected process12 dnsIp13 41 www.rssnewscast.com 91.195.240.94, 58227, 58228, 58229 SEDO-ASDE Germany 22->41 43 elettrosistemista.zip 195.110.124.133, 58235, 58236, 58237 REGISTER-ASIT Italy 22->43 45 11 other IPs or domains 22->45 67 Found direct / indirect Syscall (likely to bypass EDR) 22->67 26 netbtugc.exe 13 22->26         started        signatures14 process15 signatures16 69 Tries to steal Mail credentials (via file / registry access) 26->69 71 Tries to harvest and steal browser information (history, passwords, etc) 26->71 73 Modifies the context of a thread in another process (thread injection) 26->73 75 Maps a DLL or memory area into another process 26->75 29 firefox.exe 26->29         started        process17
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Malicious
First seen:
2024-06-07 18:28:34 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
16 of 38 (42.11%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ykgekhejbyesxv44mlxljezxdxhfgnrtp2d3prvrzwfohtggx2ga._file
Verdict:
malicious
Similar samples:
0382d0b9421be9a1c5a084869be5742803d4ec3f211294a4c96f45444952ab55
Formbook
54c9ab39f879d1c9f3fc61e3cb1ffb06ac237bb20647c1f521d09b2dbb4964d2
Formbook
59f149ffc55554ce0aac7072bba999b5abb83b023486e017f407883f8a27e4e2
Formbook
9f07c02b13a50bb84630841a7a9876c9ced2ab66d406c54f4673c88e7cd70bb4
Formbook
ba94e97e0b43b4d344e2cde0e1c5c7041b5efdb61ba3a47f2a7605dd7bb07bd2
Formbook
c18e91fedad79cf98044d7a754dd39b673018e28dc6935bc9d63515b8d91a6be
Formbook
d0b94b855d2f24add1edf6b3a6ecae24e4366f181a1ccd0bcd3b27e94de95bc0
Formbook
f718c0f6666c87fb62ec365146cdf788bf749cc5afb1c6e206f591b736a04989
Formbook
+ 17 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/240609-tezwaacb6v/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
AutoIT Executable
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Unpacked files
SH256 hash:
b44d6f57aeb656f27afc88f54c97c618d4daa697ee27c10e1887dcb5dd83eea0
MD5 hash:
c3735d448f0d4d3db6fe20d7ad033c84
SHA1 hash:
2edfaa0ec53b3c5459a40bd9d772b25bc6ce4e49
Link:
https://www.unpac.me/results/f8543949-70ca-434f-9d91-41ff39c79834/
SH256 hash:
95d4e6d867da09d9fb2302ef94d540644204068b149018da9258cc36397ffbd2
MD5 hash:
136616fdb1e67935a6142086452e8eef
SHA1 hash:
c14840db3410d29d1a16822b917dacf1860b98eb
Link:
https://www.unpac.me/results/f8543949-70ca-434f-9d91-41ff39c79834/
SH256 hash:
c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c
MD5 hash:
5b3383df0b033c0401892c1d6109f704
SHA1 hash:
91a4284ff14d31908079f87150e2b7456310d8fe
Detections:
AutoIT_Compiled
Create hunting rule
SUSP_Imphash_Mar23_3
Create hunting rule
Link:
https://www.unpac.me/results/f8543949-70ca-434f-9d91-41ff39c79834/
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/c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c

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:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
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:SUSP_Imphash_Mar23_3
Create hunting rule
Author:Arnim Rupp (https://github.com/ruppde)
Description:Detects imphash often found in malware samples (Maximum 0,25% hits with search for 'imphash:x p:0' on Virustotal) = 99,75% hits
Reference:Internal Research

File information

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

Web download

Formbook

Executable exe c28c451c890e092bd79c62eeb493371dce5336337e87b7c6b1cd8ae3ccc6be8c

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2874351/
  
Delivery method
Distributed via web download

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::CopyFileExW
KERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateHardLinkW
IPHLPAPI.DLL::IcmpCreateFile
KERNEL32.dll::CreateFileW
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

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