MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 91de5d644df27588dc5ac0cf33e902a6032403012f06a84b20de3d9daccb78e1. 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: 13
| SHA256 hash: | 91de5d644df27588dc5ac0cf33e902a6032403012f06a84b20de3d9daccb78e1 |
|---|---|
| SHA3-384 hash: | 3e30e55d8c288c7f829622ba1ac673f28212723c6216ded12fcf39469c05d59df1bcd40d5ab9809ea528adae4c706cda |
| SHA1 hash: | 5281e8047d08086b3acaac190307f78a7d4ec3c5 |
| MD5 hash: | a4bce92a13ed75b4a61d0b33764de8ae |
| humanhash: | don-winter-violet-nuts |
| File name: | ISU8109C5352024.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'999'360 bytes |
| First seen: | 2024-07-18 05:47:55 UTC |
| Last seen: | 2024-07-24 19:04:10 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 06249f041b2cdab25d6c331a97469bef (3 x RemcosRAT, 3 x Formbook) |
| ssdeep | 49152:a01xRoq0SqdSo1s9Z7N/pilLbWQ87oFfXUiUDL1jPGWp6lTdh:End9UvyJ |
| Threatray | 69 similar samples on MalwareBazaar |
| TLSH | T1DC95CF05E3E845A8E977DB34CA629333CAB178561731E58F065CD2052F33EA19B7B326 |
| TrID | 72.7% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 13.2% (.EXE) Win64 Executable (generic) (10523/12/4) 6.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 2.5% (.EXE) OS/2 Executable (generic) (2029/13) 2.5% (.EXE) Generic Win/DOS Executable (2002/3) |
| File icon (PE): |  |
| dhash icon | 74e4d4d4ecf4d4d4 (23 x GuLoader, 20 x LummaStealer, 19 x AgentTesla) |
| Reporter |  abuse_ch |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
2
# of downloads :
359
Origin country :
NLVendor Threat Intelligence
Detection(s):
Verdict:
Malicious
Score:
99.1%
Tags:
Static Generickd
Result
Verdict:
Malware
Maliciousness:
Behaviour
Launching a process
Сreating synchronization primitives
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
hacktool lolbin microsoft_visual_cc packed regedit remote shell32
Verdict:
Malicious
Labled as:
Trojan.Generic
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:
Suspicious
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Signature
AI detected suspicious sample
Allocates memory in foreign processes
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Score:
100%
Verdict:
Malware
File Type:
PE
Threat name:
Win64.Trojan.Leonem
Status:
Malicious
First seen:
2024-06-21 07:45:40 UTC
File Type:
PE+ (Exe)
Extracted files:
16
AV detection:
27 of 38 (71.05%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 59 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
7/10
Tags:
n/a
Behaviour
Runs regedit.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Uses the VBS compiler for execution
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
91de5d644df27588dc5ac0cf33e902a6032403012f06a84b20de3d9daccb78e1
MD5 hash:
a4bce92a13ed75b4a61d0b33764de8ae
SHA1 hash:
5281e8047d08086b3acaac190307f78a7d4ec3c5
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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: | BitcoinAddress |
|---|---|
| Author: | Didier Stevens (@DidierStevens) |
| Description: | Contains a valid Bitcoin address |
| Rule name: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerCheck__MemoryWorkingSet |
|---|---|
| Author: | Fernando Mercês |
| Description: | Anti-debug process memory working set size check |
| Reference: | http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/ |
| Rule name: | Disable_Defender |
|---|---|
| Author: | iam-py-test |
| Description: | Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | RIPEMD160_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for RIPEMD-160 constants |
| Rule name: | SEH__vectored |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | SHA1_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA1 constants |
| Rule name: | ThreadControl__Context |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
No further information available
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 (GUARD_CF) | high |
Reviews
| ID | Capabilities | Evidence |
|---|---|---|
| AUTH_API | Manipulates User Authorization | ADVAPI32.dll::CreateWellKnownSid ADVAPI32.dll::RevertToSelf ADVAPI32.dll::GetSecurityDescriptorLength |
| SECURITY_BASE_API | Uses Security Base API | ADVAPI32.dll::AdjustTokenPrivileges ADVAPI32.dll::DuplicateTokenEx ADVAPI32.dll::GetTokenInformation ADVAPI32.dll::GetWindowsAccountDomainSid |
| WIN32_PROCESS_API | Can Create Process and Threads | KERNEL32.dll::CreateProcessA ADVAPI32.dll::OpenProcessToken ADVAPI32.dll::OpenThreadToken ADVAPI32.dll::SetThreadToken KERNEL32.dll::VirtualAllocExNuma KERNEL32.dll::CloseHandle |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::TerminateProcess KERNEL32.dll::DeleteVolumeMountPointW KERNEL32.dll::LoadLibraryExW KERNEL32.dll::GetVolumeInformationW KERNEL32.dll::GetSystemInfo |
| WIN_BASE_EXEC_API | Can Execute other programs | KERNEL32.dll::AllocConsole KERNEL32.dll::FreeConsole KERNEL32.dll::GetConsoleOutputCP KERNEL32.dll::GetConsoleWindow |
| WIN_BASE_IO_API | Can Create Files | KERNEL32.dll::CopyFileExW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::MoveFileExW KERNEL32.dll::ReplaceFileW |
| WIN_BASE_USER_API | Retrieves Account Information | ADVAPI32.dll::LookupPrivilegeValueW |
| WIN_BCRYPT_API | Can Encrypt Files | bcrypt.dll::BCryptDecrypt bcrypt.dll::BCryptDestroyKey bcrypt.dll::BCryptGenerateSymmetricKey bcrypt.dll::BCryptGenRandom bcrypt.dll::BCryptOpenAlgorithmProvider bcrypt.dll::BCryptCloseAlgorithmProvider |
| WIN_REG_API | Can Manipulate Windows Registry | ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegDeleteKeyExW ADVAPI32.dll::RegOpenKeyExW ADVAPI32.dll::RegQueryInfoKeyW ADVAPI32.dll::RegQueryValueExW ADVAPI32.dll::RegSetValueExA ADVAPI32.dll::RegSetValueExW |
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