MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 40900bdbfd55f8f206b3b6233c633f35109a6a390c0266eeb542aa939121c035. 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: | 40900bdbfd55f8f206b3b6233c633f35109a6a390c0266eeb542aa939121c035 |
|---|---|
| SHA3-384 hash: | bf80035874af36c9cfd8b3a6a9b8b5a1dd49de077e780c0220cb90f49260d8947bd86d2fe08d5192c959e086a8f97a07 |
| SHA1 hash: | 3ca5c3c36b7bb2248314d7ec1a52c8d35f91abb4 |
| MD5 hash: | b95ae22cfc520970ed411ed0a1ca274d |
| humanhash: | ohio-lake-hotel-minnesota |
| File name: | 40900bdbfd55f8f206b3b6233c633f35109a6a390c0266eeb542aa939121c035 |
| Download: | download sample |
| Signature | Formbook |
| File size: | 777'736 bytes |
| First seen: | 2025-09-05 12:24:52 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger) |
| ssdeep | 12288:frOq8x2CmkHJfhS/ShZ2hKQYlHzeK6qjEheKq/3WrwK4AH0p7is0kR:fvl9uS/SjQAz/Hg4Kqfi348CWM |
| Threatray | 772 similar samples on MalwareBazaar |
| TLSH | T1A2F422812BAA9906D5661F3A1A71D23907B0BECEB811E3174EC8FDDFB9B13940D04387 |
| 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 :
54
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
40900bdbfd55f8f206b3b6233c633f35109a6a390c0266eeb542aa939121c035
Verdict:
Malicious activity
Analysis date:
2025-09-05 13:09:43 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:
92.5%
Tags:
n/a
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)
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
invalid-signature obfuscated packed packed packer_detected signed
Verdict:
Malicious
Labled as:
Trojan.Agent
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-08-12T04:11:00Z UTC
Last seen:
2025-08-12T04:11:00Z UTC
Hits:
~1000
Malware family:
Formbook
Verdict:
Malicious
Score:
96%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.24 Win 32 Exe x86
Threat name:
ByteCode-MSIL.Trojan.MassLogger
Status:
Malicious
First seen:
2025-08-12 08:40:55 UTC
File Type:
PE (.Net Exe)
Extracted files:
15
AV detection:
27 of 38 (71.05%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
unc_loader_037
Similar samples:
+ 762 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:
40900bdbfd55f8f206b3b6233c633f35109a6a390c0266eeb542aa939121c035
MD5 hash:
b95ae22cfc520970ed411ed0a1ca274d
SHA1 hash:
3ca5c3c36b7bb2248314d7ec1a52c8d35f91abb4
SH256 hash:
7ad5f73cfaa94d981567140f61f512a753130f70d49f8e92731e3106b4f2b7b5
MD5 hash:
554dc2a07a4d75652b4c1a53a014fce8
SHA1 hash:
28d7c29590c5fa2309cada56572056b66fb94f39
SH256 hash:
c026a8fdde4352e6873940aaf0f19e1a52db368b5e5a844dee1a04cedf2aa3c8
MD5 hash:
3bb94b4d2f837275b02b0cc55e68e729
SHA1 hash:
31367d2745fdecd78ddc50f7767b5ccba5156443
SH256 hash:
fba7f1bb21fa66fa4440e8ef74ebececb83a251992ecbe4e84f3ec7482488079
MD5 hash:
0e925fc1233d2a5602e4831937d1b144
SHA1 hash:
3fdf59b444396c8f4801810f6bc6788aa87ebe00
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
SUSP_OBF_NET_Reactor_Indicators_Jan24
SH256 hash:
32fdaea2b32c13c2b928b175e336b04dc2273108103440c6e5706421b2eec8ab
MD5 hash:
f77a619c8604c73740e89babf4d37d0d
SHA1 hash:
0e590db88e667465ce3b993e61208985bead8786
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
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: | 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: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438 |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables signed with stolen, revoked or invalid certificates |
| Rule name: | meth_stackstrings |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| 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 |
| Rule name: | Sus_Obf_Enc_Spoof_Hide_PE |
|---|---|
| Author: | XiAnzheng |
| Description: | Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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