MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 3664a6fa9e03db4a88b517c80f08dbd11e19bfe5237315f5d9550f4bff359186. 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: 15
| SHA256 hash: | 3664a6fa9e03db4a88b517c80f08dbd11e19bfe5237315f5d9550f4bff359186 |
|---|---|
| SHA3-384 hash: | 4d883841ec585c005cd96febd8636151c3efd481eba21f50a8bd9868bfe84b051b6daeb7a69d305a62821b416d617213 |
| SHA1 hash: | 7c40e6a6d40bc00dedc2b098889dc6ed992cff40 |
| MD5 hash: | 7317b80f6cc2d0c9ad46a2e246b99256 |
| humanhash: | alanine-violet-victor-beryllium |
| File name: | 3664a6fa9e03db4a88b517c80f08dbd11e19bfe5237315f5d9550f4bff359186 |
| Download: | download sample |
| Signature | Formbook |
| File size: | 787'456 bytes |
| First seen: | 2025-10-10 06:37:21 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'749 x AgentTesla, 19'653 x Formbook, 12'246 x SnakeKeylogger) |
| ssdeep | 24576:JxOuwHPM9TkAoWV45b1ymI7HOFLqj7heyUF+irFI:Jxtr9+YwI1uFLqjdGYirFI |
| Threatray | 1'970 similar samples on MalwareBazaar |
| TLSH | T1A5F4024422ADEF06D5755BF40470E37403B66EC8B921E24A8FE5BCEB7879F916884387 |
| TrID | 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10522/11/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9) |
| Magika | pebin |
| Reporter |  adrian__luca |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
59
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3664a6fa9e03db4a88b517c80f08dbd11e19bfe5237315f5d9550f4bff359186
Verdict:
No threats detected
Analysis date:
2025-10-10 08:23:09 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Verdict:
Malicious
Score:
92.5%
Tags:
virus micro
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Sending a custom TCP request
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
obfuscated packed packed packer_detected vbnet
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-15T07:11:00Z UTC
Last seen:
2025-09-30T09:15:00Z UTC
Hits:
~1000
Malware family:
Formbook
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Status:
Malicious
First seen:
2025-09-15 16:48:53 UTC
File Type:
PE (.Net Exe)
Extracted files:
13
AV detection:
26 of 36 (72.22%)
Threat level:
2/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
unc_loader_037
unc_loader_078
Similar samples:
+ 1'960 additional samples on MalwareBazaar
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
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
3664a6fa9e03db4a88b517c80f08dbd11e19bfe5237315f5d9550f4bff359186
MD5 hash:
7317b80f6cc2d0c9ad46a2e246b99256
SHA1 hash:
7c40e6a6d40bc00dedc2b098889dc6ed992cff40
SH256 hash:
643694dad37d84797d0cb7b1b7aa89f6ceaefe52e79b9ab3287bfaa5eea66536
MD5 hash:
58a1ed0c55d0ba54e1554e7ad1a2ad34
SHA1 hash:
0a222191b2830549fcb378c45fef54ce093372b6
SH256 hash:
1041b538ccbc7d66e59247ef7551cde9b6c282843541585e9190a8e2e3943b12
MD5 hash:
e870d1e8f3791ccc141f85f40fd2972b
SHA1 hash:
150919ee289cffa6feb40ab8261f620dd7e26aac
SH256 hash:
83b7ed12778c040274e249be70acced47be222df015e33124a4bafb884af6cd4
MD5 hash:
e4a056b6e6ee8c30a8f3ecac1c05567c
SHA1 hash:
8685538d24ec32124418de0efff128df6c8df4bc
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
SUSP_OBF_NET_Reactor_Indicators_Jan24
SH256 hash:
ab08eec4162ea774a28ca375bf2813fdd98498b66b3f4f8e52418412a3ea7027
MD5 hash:
a989c77517ab78e79df9af958b4160bb
SHA1 hash:
66888113f031077fb58042e2c8d56c15fc6cdf9c
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
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: | CP_AllMal_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | pe_no_import_table |
|---|---|
| Description: | Detect pe file that no import table |
| Rule name: | shellcode |
|---|---|
| Author: | nex |
| Description: | Matched shellcode byte patterns |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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