MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 3ca79e899fc4afb051d79323ae71ec356bd8a8cff6cebbfba6c8ce80f41db2a3. 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: 16
| SHA256 hash: | 3ca79e899fc4afb051d79323ae71ec356bd8a8cff6cebbfba6c8ce80f41db2a3 |
|---|---|
| SHA3-384 hash: | 946ea6d0cd285484b988a4b3ffb9430fa98c49f282536527f64621c7a6f07927db8db87b6332f7b059b665237bc86a8e |
| SHA1 hash: | 9c60372c998ce3c3c4bbf8ae12ff7fe26d85e1c6 |
| MD5 hash: | 6f81ed9533724a515d9f1f3ef140383c |
| humanhash: | six-december-paris-table |
| File name: | estado de cuenta adjunto.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 2'216'544 bytes |
| First seen: | 2024-08-30 13:21:47 UTC |
| Last seen: | 2024-08-30 14:17:58 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 0a6d80c5b45dc9232fe72a993ca3e0d3 (2 x Formbook, 1 x AgentTesla, 1 x SnakeKeylogger) |
| ssdeep | 49152:0l2eQMj254Xra+qk6okjyjxKtyE6qVG13lJoWFC57H:k4ebHCx |
| Threatray | 48 similar samples on MalwareBazaar |
| TLSH | T116A5BE14E3A811A8E867D738CA659333D6B078524731E58F0A99D6452F73ED2AF7F302 |
| TrID | 47.1% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 35.2% (.EXE) InstallShield setup (43053/19/16) 8.6% (.EXE) Win64 Executable (generic) (10523/12/4) 4.1% (.EXE) Win16 NE executable (generic) (5038/12/1) 1.6% (.EXE) OS/2 Executable (generic) (2029/13) |
| Magika | pebin |
| File icon (PE): |  |
| dhash icon | e0c4a2a2a4acbcd8 (11 x Formbook, 7 x SnakeKeylogger, 6 x RemcosRAT) |
| Reporter |  TeamDreier |
| Tags: | exe FormBook signed |
Code Signing Certificate
| Organisation: | Microsoft Code Signing PCA 2011 |
|---|---|
| Issuer: | Microsoft Code Signing PCA 2011 |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2024-08-29T14:37:09Z |
| Valid to: | 2025-08-29T14:37:09Z |
| Serial number: | 7f3f5d483023afce7d31f75fbedb092e |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 320474ae5ed1db163880f293af361e1efded8c17b9c8654c05a5584effa76486 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
2
# of downloads :
427
Origin country :
DKVendor Threat Intelligence
Malware family:
formbook
ID:
1
File name:
estado de cuenta adjunto.exe
Verdict:
Malicious activity
Analysis date:
2024-08-30 13:22:47 UTC
Tags:
formbook xloader stealer
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.1%
Tags:
Encryption Network Static Stealth Swotter
Result
Verdict:
Malware
Maliciousness:
Behaviour
Launching a process
Сreating synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
fingerprint hacktool lolbin microsoft_visual_cc overlay 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.
Malware family:
Formbook
Verdict:
Malicious
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
AI detected suspicious sample
Allocates memory in foreign processes
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
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 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 harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses regedit.exe to modify the Windows registry
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Score:
100%
Verdict:
Malware
File Type:
PE
Threat name:
Win64.Backdoor.FormBook
Status:
Malicious
First seen:
2024-08-29 18:46:36 UTC
File Type:
PE+ (Exe)
Extracted files:
3
AV detection:
17 of 24 (70.83%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 38 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
9/10
Tags:
credential_access discovery persistence stealer
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Modifies Internet Explorer settings
Modifies registry class
Runs regedit.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Uses the VBS compiler for execution
Adds policy Run key to start application
Credentials from Password Stores: Credentials from Web Browsers
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
3ca79e899fc4afb051d79323ae71ec356bd8a8cff6cebbfba6c8ce80f41db2a3
MD5 hash:
6f81ed9533724a515d9f1f3ef140383c
SHA1 hash:
9c60372c998ce3c3c4bbf8ae12ff7fe26d85e1c6
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: | 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: | Jupyter_infostealer |
|---|---|
| Author: | CD_R0M_ |
| Description: | Rule for Jupyter Infostealer/Solarmarker malware from september 2021-December 2022 |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| Rule name: | PE_Potentially_Signed_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| 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.
Malspam
Delivery method
Distributed via e-mail attachment
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_DLL_CHARACTERISTICS | Missing dll Security Characteristics (GUARD_CF) | high |
Reviews
| ID | Capabilities | Evidence |
|---|---|---|
| SECURITY_BASE_API | Uses Security Base API | ADVAPI32.dll::AdjustTokenPrivileges |
| WIN32_PROCESS_API | Can Create Process and Threads | KERNEL32.dll::CreateProcessW ADVAPI32.dll::OpenProcessToken KERNEL32.dll::OpenProcess KERNEL32.dll::VirtualAllocExNuma KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThreadpoolIo KERNEL32.dll::CreateThread |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::TerminateProcess KERNEL32.dll::LoadLibraryExW KERNEL32.dll::GetSystemInfo |
| WIN_BASE_EXEC_API | Can Execute other programs | KERNEL32.dll::AllocConsole KERNEL32.dll::FreeConsole KERNEL32.dll::GetConsoleWindow KERNEL32.dll::GetConsoleOutputCP |
| WIN_BASE_IO_API | Can Create Files | KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW |
| WIN_BASE_USER_API | Retrieves Account Information | ADVAPI32.dll::LookupPrivilegeValueW |
| WIN_BCRYPT_API | Can Encrypt Files | bcrypt.dll::BCryptDestroyKey bcrypt.dll::BCryptGenerateSymmetricKey bcrypt.dll::BCryptGenRandom bcrypt.dll::BCryptOpenAlgorithmProvider bcrypt.dll::BCryptCloseAlgorithmProvider |
| WIN_REG_API | Can Manipulate Windows Registry | ADVAPI32.dll::RegOpenKeyExW ADVAPI32.dll::RegQueryValueExW ADVAPI32.dll::RegSetValueExW |
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