MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 d66989cba3e79d4803a48476a9d627e88cbc7f66353402388db5f7597e0caf2c. 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
| SHA256 hash: | d66989cba3e79d4803a48476a9d627e88cbc7f66353402388db5f7597e0caf2c |
|---|---|
| SHA3-384 hash: | a3dca4bb5d4d3f3ec1d1e3fbd8aaf63af22315ef2ef8266ddde556cdc83420498cfbc66d50980a2ffa94661253082594 |
| SHA1 hash: | eb217356c47703c57f0ffa2b9b3591526d401351 |
| MD5 hash: | f3e7d12a0927d3de63514bbccfe17f05 |
| humanhash: | juliet-uncle-batman-island |
| File name: | d66989cba3e79d4803a48476a9d627e88cbc7f66353402388db5f7597e0caf2c |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'188'352 bytes |
| First seen: | 2025-08-12 14:12:46 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 3d95adbf13bbe79dc24dccb401c12091 (881 x AgentTesla, 737 x FormBook, 236 x SnakeKeylogger) |
| ssdeep | 24576:2tb20pkaCqT5TBWgNQ7an44GO2e2at0h+6A:jVg5tQ7anLnl5 |
| Threatray | 2'678 similar samples on MalwareBazaar |
| TLSH | T15245C01373DD8365C7B25273BA25BB01AEBB782506B1F96B2FD4093DE920122521E773 |
| 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 |  adrian__luca |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
32
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Human Resources Memorandum.rar.7z
Verdict:
Malicious activity
Analysis date:
2025-07-23 04:56:29 UTC
Tags:
arch-exec autoit
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Detection(s):
Verdict:
Malicious
Score:
99.1%
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:
Malicious
Labled as:
Win/malicious_confidence_100%
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Gathering data
Verdict:
Malicious
Threat:
Trojan.Win32.Noon
Threat name:
Win32.Trojan.AutoitInject
Status:
Malicious
First seen:
2025-07-23 09:36:00 UTC
File Type:
PE (Exe)
Extracted files:
24
AV detection:
29 of 38 (76.32%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
autoit
Similar samples:
+ 2'668 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
d66989cba3e79d4803a48476a9d627e88cbc7f66353402388db5f7597e0caf2c
MD5 hash:
f3e7d12a0927d3de63514bbccfe17f05
SHA1 hash:
eb217356c47703c57f0ffa2b9b3591526d401351
SH256 hash:
397d955c1756681a9878d8791669ab20f7c0c13379e67e67f5a6c5ab236c7713
MD5 hash:
42e576e893259fedec463bd7fe5a4c5b
SHA1 hash:
334606316c531f274bd5a14baa0e7a2d367b8cf0
SH256 hash:
9d1f17f2ffddaca32e760b9777af84d4159149773c5022738951eeb0a8bfb7e1
MD5 hash:
0d226c5d291db2e71268ac259b61e881
SHA1 hash:
a51021ccfd9f647751d05d9277c725a61516b1df
Detections:
win_formbook_g0
Parent samples :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 note that we are no longer able to provide a coverage score for Virus Total.
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 |
|---|---|
| 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 |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | Formbook |
|---|---|
| Author: | kevoreilly |
| Description: | Formbook Payload |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | meth_stackstrings |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | pe_no_import_table |
|---|---|
| Description: | Detect pe file that no import table |
| Rule name: | RIPEMD160_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for RIPEMD-160 constants |
| Rule name: | SHA1_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA1 constants |
| Rule name: | shellcode |
|---|---|
| Author: | nex |
| Description: | Matched shellcode byte patterns |
| Rule name: | Sus_Obf_Enc_Spoof_Hide_PE |
|---|---|
| Author: | XiAnzheng |
| Description: | Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP) |
| Rule name: | YahLover |
|---|---|
| Author: | Kevin Falcoz |
| Description: | YahLover |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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
| ID | Title | Severity |
|---|---|---|
| CHECK_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (HIGH_ENTROPY_VA) | high |
| CHECK_NX | Missing Non-Executable Memory Protection | critical |
Reviews
| ID | Capabilities | Evidence |
|---|---|---|
| AUTH_API | Manipulates User Authorization | ADVAPI32.dll::AllocateAndInitializeSid ADVAPI32.dll::CopySid ADVAPI32.dll::FreeSid ADVAPI32.dll::GetLengthSid ADVAPI32.dll::GetTokenInformation ADVAPI32.dll::GetAce |
| COM_BASE_API | Can Download & Execute components | ole32.dll::CLSIDFromProgID ole32.dll::CoCreateInstance ole32.dll::CoCreateInstanceEx ole32.dll::CoInitializeSecurity ole32.dll::CreateStreamOnHGlobal |
| MULTIMEDIA_API | Can Play Multimedia | WINMM.dll::mciSendStringW WINMM.dll::timeGetTime WINMM.dll::waveOutSetVolume |
| SECURITY_BASE_API | Uses Security Base API | ADVAPI32.dll::AddAce ADVAPI32.dll::AdjustTokenPrivileges ADVAPI32.dll::CheckTokenMembership ADVAPI32.dll::DuplicateTokenEx ADVAPI32.dll::GetAclInformation ADVAPI32.dll::GetSecurityDescriptorDacl |
| SHELL_API | Manipulates System Shell | SHELL32.dll::ShellExecuteExW SHELL32.dll::ShellExecuteW SHELL32.dll::SHFileOperationW |
| WIN32_PROCESS_API | Can Create Process and Threads | ADVAPI32.dll::CreateProcessAsUserW KERNEL32.dll::CreateProcessW ADVAPI32.dll::CreateProcessWithLogonW KERNEL32.dll::OpenProcess ADVAPI32.dll::OpenProcessToken ADVAPI32.dll::OpenThreadToken |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::TerminateProcess KERNEL32.dll::SetSystemPowerState KERNEL32.dll::LoadLibraryA KERNEL32.dll::LoadLibraryExW KERNEL32.dll::LoadLibraryW KERNEL32.dll::GetDriveTypeW |
| WIN_BASE_EXEC_API | Can Execute other programs | KERNEL32.dll::WriteConsoleW KERNEL32.dll::ReadConsoleW KERNEL32.dll::SetStdHandle KERNEL32.dll::GetConsoleCP KERNEL32.dll::GetConsoleMode |
| WIN_BASE_IO_API | Can Create Files | KERNEL32.dll::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateHardLinkW IPHLPAPI.DLL::IcmpCreateFile KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW |
| WIN_BASE_USER_API | Retrieves Account Information | KERNEL32.dll::GetComputerNameW ADVAPI32.dll::GetUserNameW ADVAPI32.dll::LogonUserW ADVAPI32.dll::LookupPrivilegeValueW |
| WIN_NETWORK_API | Supports Windows Networking | MPR.dll::WNetAddConnection2W MPR.dll::WNetUseConnectionW |
| WIN_REG_API | Can Manipulate Windows Registry | ADVAPI32.dll::RegConnectRegistryW ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegDeleteKeyW ADVAPI32.dll::RegOpenKeyExW ADVAPI32.dll::RegQueryValueExW ADVAPI32.dll::RegSetValueExW |
| WIN_USER_API | Performs GUI Actions | USER32.dll::BlockInput USER32.dll::CloseDesktop USER32.dll::CreateMenu USER32.dll::EmptyClipboard USER32.dll::FindWindowExW USER32.dll::FindWindowW |
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