MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 a4d4b678f439b3cc7b0006a10835fec8f694eecc19f46257687967f2928df7be. 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: | a4d4b678f439b3cc7b0006a10835fec8f694eecc19f46257687967f2928df7be |
|---|---|
| SHA3-384 hash: | 1d5b0215ed3b5bfd69a0c856cab395ab8032f0627729e9fef57d7e6224c7cbf10ddb6d1d54ff738a2c2c187c95a0028f |
| SHA1 hash: | c8a16e307f4ca2ce0620e27b58123c40b3d18368 |
| MD5 hash: | a6263c69669ea19d5f34466e3f3fcf78 |
| humanhash: | aspen-sweet-neptune-spring |
| File name: | a4d4b678f439b3cc7b0006a10835fec8f694eecc19f46257687967f2928df7be |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'240'064 bytes |
| First seen: | 2026-10-19 08:00:41 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/vnd.microsoft.portable-executable |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (49'287 x AgentTesla, 20'689 x Formbook, 12'401 x SnakeKeylogger) |
| ssdeep | 24576:xlg2qj0qdPugxEur6es9jl4bny0Xa+PDPsrrtxHaQ8MN+5uIljnLQl:XYkwEd9jl420XhPzAx6Q828XjnUl |
| TLSH | T1744501587766D802C665533645E2E9B803784ED8F413D79AAFEC7EDB762AF0A0D80343 |
| 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 | 0000000000000000 (909 x AgentTesla, 577 x Formbook, 319 x RedLineStealer) |
| Reporter |  adrian__luca |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
156
Origin country :
HUVendor Threat Intelligence
Malware configuration found for:
NETReactor
RoboSki
Details
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-10-19 12:13:03 UTC
Tags:
netreactor
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Verdict:
Malicious
Score:
96.5%
Tags:
virus msil cupi
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a custom TCP request
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Gathering data
Verdict:
Malicious
Labled as:
FormBook.Generic
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-09-07T23:07:00Z UTC
Last seen:
2026-10-05T11:29:00Z UTC
Hits:
~100
Malware family:
Formbook
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Status:
Malicious
First seen:
2026-09-08 03:43:50 UTC
File Type:
PE (.Net Exe)
Extracted files:
23
AV detection:
22 of 36 (61.11%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
Formbook
XWorm
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
a4d4b678f439b3cc7b0006a10835fec8f694eecc19f46257687967f2928df7be
MD5 hash:
a6263c69669ea19d5f34466e3f3fcf78
SHA1 hash:
c8a16e307f4ca2ce0620e27b58123c40b3d18368
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
SH256 hash:
60bdee938635f42ec81f396de80e99f7bbbe69d6af4d60c265adaab3d1c90ced
MD5 hash:
10d9fec87e9983c03f69470c3c3ff200
SHA1 hash:
0554c8193d28e7bb05fe077a44f53138bdc21fb9
SH256 hash:
0ccda5fb8da309f4ca1af9510db9bbcbf8d91c6a12758f2ff05bfc885d46e764
MD5 hash:
19c91fe72a4e7aa7b59d84baf6ce9383
SHA1 hash:
672187a0dbc9f2314ffb8b34f9601fb29b2eb1d7
SH256 hash:
6f41ff60d09559816d2d3caa722bbc4a9bdcb22e9f68b517cf7562391b8b7a0f
MD5 hash:
e10e54d442e46adfd7819353b787e277
SHA1 hash:
a3d9c964341132b1fbb5eebe81e6355b6f8bdcd4
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Malware family:
FormBook
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: | NET |
|---|---|
| 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_Malware_Unknown_ForgeAuto_6717780a_Extrait |
|---|---|
| Author: | Marjoriefort |
| Description: | Detects Unknown (pe, etat extrait) |
| Rule name: | WIN_Malware_XWorm_ForgeAuto_6b06c990_Extrait |
|---|---|
| Author: | Marjoriefort |
| Description: | Detects XWorm (pe, etat extrait) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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