MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7. 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


Intelligence 14 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7
SHA3-384 hash: 9c57e4d3e8301b65c4eb4a7074b2303eb05e4548396fdc30f2659542cb9f05fc8e5d62d26f2cb6a8fa18fda300348e5b
SHA1 hash: a227836aedaf29655c1b82849b79dbce5133ccd8
MD5 hash: 1ed4a9a4d67826fb3fb32a91bf0b31b4
humanhash: timing-high-artist-earth
File name:ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7
Download: download sample
Signature Formbook
Create hunting rule
File size:989'184 bytes
First seen:2026-02-05 15:46:55 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'818 x AgentTesla, 19'742 x Formbook, 12'286 x SnakeKeylogger)
ssdeep 12288:gOTTi2e/ITV7hArOqA4ECDWPgHUdWiQIG8c+ybakt8AVZeulicCEwZ6o:gQTGYDqA4EPg0g/9TGAVfPit
Threatray 2'659 similar samples on MalwareBazaar
TLSH T1B82512583349E806C4524BB45DB1E3B01338AE8CF5A5E7438FFABCEF786679668541C2
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10522/11/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
94
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/f1fedaf4-5919-4f40-90f9-8b165e64e79b/
Malware family:
n/a
ID:
1
File name:
ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7
Verdict:
No threats detected
Analysis date:
2026-02-05 22:03:32 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a0184d44-4904-47c8-bee2-b20f4e87dae8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/52196/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6984bb9eae5379bb6609c9cb
Tags:
virus micro msil
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
krypt packed reconnaissance vbnet
Link:
https://www.filescan.io/uploads/6984bb8c930564ff3c8d2dff/reports/a919be5c-d81b-4e4a-860e-754cca71d003/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-26T23:39:00Z UTC
Last seen:
2026-02-07T10:20:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/772cf132-c617-4726-9853-a363b60b8368
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2026-01-27 04:07:48 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=54mzsugeddw64scdejlasjcmim3m3ecbij6ov5df43rs6hjwqtlq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
4eef5964d4be888f65a3410d0f60fd3559021aff06bf1448c919e294b7ecb72e
Formbook
5a721e420c6fc129a198af6fd7458202c574cff68e0b60b4372a8af5767bd2d9
Formbook
66d0c643f5aa03a5b4303caf17c128e0dc030530f22da3af6ed927cbc9e4f1d6
Formbook
7f9d39908a024cc37cdece4ecc8aa724695ee2873d80ed4b1e7f8f8f3ee7ed5d
Formbook
99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6
Formbook
b0fa29feb4da48f088d9e383d10ad8aef023efa91f6501142bb1f20749fd23d2
Formbook
ba793f464cd2de54e4f0262bd425ac42349931e1ad84a4bf5207b13c9c53ac53
Formbook
error
Formbook
+ 2'649 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/260205-s8ea1aby5a/
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
Unpacked files
SH256 hash:
c67b125ceadd0ee13c9219961d5e2f4333bf7b57c63aa2fb11b0d85ff1784c98
MD5 hash:
4d0ce77c89ec6528b15553e7c4cb0b67
SHA1 hash:
0b111736477c4f11e6f9d9fa9126cb698b69ed46
Link:
https://www.unpac.me/results/6f641d52-dcbd-4e82-9c01-0341a666a2c6/
SH256 hash:
ba5eb27843c9a4083076cc991fb1766a5ca2c3381a2bdbc66da682b3c760185d
MD5 hash:
8dc5e71cde087cf7a0e26bf6ccf4c137
SHA1 hash:
b74e6ce6a53907273e87bc2409d95559397e275f
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/6f641d52-dcbd-4e82-9c01-0341a666a2c6/
SH256 hash:
dfe5b8a9dee1d13a6fede78e16acfa049d7033db057056f6e8cf09bfc1ed2c8e
MD5 hash:
44595f6db484403a2508ded56b522cd4
SHA1 hash:
e69f7331688f551044230fa230347b51f6fac746
Link:
https://www.unpac.me/results/6f641d52-dcbd-4e82-9c01-0341a666a2c6/
SH256 hash:
ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7
MD5 hash:
1ed4a9a4d67826fb3fb32a91bf0b31b4
SHA1 hash:
a227836aedaf29655c1b82849b79dbce5133ccd8
Link:
https://www.unpac.me/results/6f641d52-dcbd-4e82-9c01-0341a666a2c6/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ef199950c418/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.61
Link:
https://yomi.yoroi.company/submissions/ef199950c418edee4843225609244c4336cd9041427ceaf465e6e32f1d3684d7

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
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Cape
Cape
https://www.capesandbox.com/analysis/52196/

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