MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 266aecbd997bf5fa28ff9bee4265f039456f98c70960a0beaeb54825b8c2f7a5. 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: | 266aecbd997bf5fa28ff9bee4265f039456f98c70960a0beaeb54825b8c2f7a5 |
|---|---|
| SHA3-384 hash: | 073d73826f98eb7116beae4340a9732b61c1506113b40b9211f88575e82030927e5355979675009f8487694d3a9d5bd5 |
| SHA1 hash: | eb2d8ae728c82e9d774c166bcdf8b45707e0ea35 |
| MD5 hash: | 410c236795764b360f572ca17d8eefa5 |
| humanhash: | virginia-four-alanine-hot |
| File name: | 266aecbd997bf5fa28ff9bee4265f039456f98c70960a0beaeb54825b8c2f7a5.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'106'432 bytes |
| First seen: | 2026-10-14 16:01:52 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/vnd.microsoft.portable-executable |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (49'272 x AgentTesla, 20'609 x Formbook, 12'394 x SnakeKeylogger) |
| ssdeep | 12288:pKX7n4P0YDH+NkAviGgQDmcKhaUn0QSrA4EMrEVUkMcMOV0yXkik7og2Btpc:0kyNkAKuHpg7MV1OVpC2Tp |
| TLSH | T10A35D0E52149AE02F47B13F03939D93B027E6D6E6170D20909EABFDBB5B674120507B7 |
| TrID | 73.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 6.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 6.6% (.EXE) Win64 Executable (generic) (6522/11/2) 4.5% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9) |
| Magika | pebin |
| dhash icon | 838d46b6b2505c50 (1 x Formbook) |
| Reporter |  ShadowOpCode |
| Tags: | exe FormBook RGBLoader |
Intelligence
File Origin
# of uploads :
1
# of downloads :
54
Origin country :
ITVendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Malware family:
agenttesla
ID:
1
File name:
https://temp.sh/HVmiT/RGBLoader.zip
Verdict:
Malicious activity
Analysis date:
2026-10-14 15:16:47 UTC
Tags:
rat pulsar netreactor ip-check evasion stealer agenttesla ftp exfiltration uac xworm screenconnect rmm-tool smtp ultravnc telegram snake keylogger
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a custom TCP request
Launching a service
Creating synchronization primitives
Creating a process with a hidden window
Launching a process
Creating a file
Forced shutdown of a system process
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
crypt packed
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-10-06T12:55:00Z UTC
Last seen:
2026-10-13T14:53:00Z UTC
Hits:
~1000
Verdict:
Unknown
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Status:
Malicious
First seen:
2026-10-06 15:52:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
11
AV detection:
24 of 36 (66.67%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
266aecbd997bf5fa28ff9bee4265f039456f98c70960a0beaeb54825b8c2f7a5
MD5 hash:
410c236795764b360f572ca17d8eefa5
SHA1 hash:
eb2d8ae728c82e9d774c166bcdf8b45707e0ea35
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: | DotNet_RGB_Embedded_AssemblyLoader_Hunt |
|---|---|
| Author: | ShadowOpCode |
| Description: | Hunt .NET bitmap RGB extraction combined with embedded resources and assembly loading |
| Rule name: | HUNT_NET_Loader_ImagePixel_To_AssemblyLoad |
|---|---|
| Author: | Anish Bogati |
| Description: | Hunting: .NET loader that reads pixel data from an embedded image, loads it as a .NET assembly, and runs it via reflection or late binding. Catches bitmap-steganography loaders. |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | WIN_Malware_Derialock_ForgeAuto_3127f957_Extrait |
|---|---|
| Author: | Marjoriefort |
| Description: | Detects Derialock (pe, etat extrait) |
| Rule name: | WIN_Sample_Unique_69354b41 |
|---|---|
| Author: | Marjoriefort |
| Description: | Specimen unique (soumission Bazaar) - strings distinctifs propres au sample |
| Reference: | 69354b41e10daf03d3f3af881b32d5c0fec56b1cfe96629fd4c5263413a42854.exe |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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