MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484. 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: 17


Intelligence 17 IOCs YARA 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484
SHA3-384 hash: c9134803c7d8faed3d48268d9fe762beb0e21c61d822f514aa852402b339b2ddd3c6e4a4bbdf05718086dbc3b99eca12
SHA1 hash: 3b4d8bb47ef345768e3469ab678d4b06830b95c5
MD5 hash: d1fd3306716bc38b0b4e49495ac891bd
humanhash: orange-kitten-montana-east
File name:3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484
Download: download sample
Signature Formbook
Create hunting rule
File size:869'376 bytes
First seen:2025-03-10 11:30:10 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'614 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:rGHzJekOthg+u6P18L7Dpde/ogYihFlkd7UKeT:o9ohicaL7DvH3ih3w
Threatray 1'116 similar samples on MalwareBazaar
TLSH T11005F19C6246C503C81E07384972D7F512282E9A9641DB5B9FEC7FBB7472F291D03BA2
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 :
308
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484
Verdict:
No threats detected
Analysis date:
2025-03-10 13:43:06 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/0e58da73-5bec-41ec-b12b-d738f39bac15

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67ced6d80d1b39e3a208b173
Tags:
virus msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed packed packer_detected powershell vbnet
Link:
https://www.filescan.io/uploads/67cecd583c5f644bd94b19c4/reports/239731a9-02b8-47f8-adbc-f5b67c94f593/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e8926c77-df5d-4b94-9538-44ae642dcd9f
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1633560
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Reads the DNS cache
Sample uses process hollowing technique
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses ipconfig to lookup or modify the Windows network settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1633560 Sample: ZJSBJuPAXe.exe Startdate: 10/03/2025 Architecture: WINDOWS Score: 100 30 www.xossw.info 2->30 32 www.rasilcap-iagen.info 2->32 34 2 other IPs or domains 2->34 38 Found malware configuration 2->38 40 Malicious sample detected (through community Yara rule) 2->40 42 Antivirus detection for URL or domain 2->42 44 8 other signatures 2->44 11 ZJSBJuPAXe.exe 3 2->11         started        signatures3 process4 file5 28 C:\Users\user\AppData\...\ZJSBJuPAXe.exe.log, ASCII 11->28 dropped 54 Tries to detect virtualization through RDTSC time measurements 11->54 56 Switches to a custom stack to bypass stack traces 11->56 15 ZJSBJuPAXe.exe 11->15         started        signatures6 process7 signatures8 58 Modifies the context of a thread in another process (thread injection) 15->58 60 Maps a DLL or memory area into another process 15->60 62 Sample uses process hollowing technique 15->62 64 2 other signatures 15->64 18 explorer.exe 33 7 15->18 injected process9 signatures10 36 Uses ipconfig to lookup or modify the Windows network settings 18->36 21 ipconfig.exe 18->21         started        process11 signatures12 46 Modifies the context of a thread in another process (thread injection) 21->46 48 Reads the DNS cache 21->48 50 Maps a DLL or memory area into another process 21->50 52 2 other signatures 21->52 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484/
Threat name:
ByteCode-MSIL.Trojan.SnakeKeylogger
Create hunting rule
Status:
Malicious
First seen:
2025-02-24 19:07:01 UTC
File Type:
PE (.Net Exe)
Extracted files:
20
AV detection:
27 of 38 (71.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hec2hxcpw3z6y6hdjsrctkgciw6hmqhqijmyk5tdly362ai6isca._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
formbook
Create hunting rule
Similar samples:
18cc402054f5c3b2abe9fc659dae16c9757312a9c9d7f4b614909b6bd97ff39f
Formbook
7df9ceec9c6ece56d60b5264804b0c9360c4f87bc595d9987c5d87990511ba34
Formbook
a99557a845d8d3d6a2f5d4ee8f51baf5b19960ddb827f1668598942737b8952c
Formbook
b1d422db723db6c2f7293a2c09397b46677407aaea878d24c63b0911edd0c6d0
Formbook
cb122b2022fcde8c2f1704ac186a0add17028456d867be7fed22e4244bca4a64
Formbook
error
Formbook
+ 1'106 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:i62s discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250310-nmcg3asqt2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/f2126d79-ef39-4b1d-bd2f-160de4a76d6c
Unpacked files
SH256 hash:
3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484
MD5 hash:
d1fd3306716bc38b0b4e49495ac891bd
SHA1 hash:
3b4d8bb47ef345768e3469ab678d4b06830b95c5
Link:
https://www.unpac.me/results/a8e3aed1-304f-4944-9c75-303696d59c11/
SH256 hash:
e80a463e16b14b43e4112cb8f0cb0cf44ff245be592202042373a02b9ea4deb9
MD5 hash:
bbea1aafd0d7058f6f46c8ceff355f96
SHA1 hash:
14ca07073c0a943129823d6532358a55761a203f
Link:
https://www.unpac.me/results/a8e3aed1-304f-4944-9c75-303696d59c11/
SH256 hash:
243557c180ccb485382e97e9e7f055f5260925afba9ab06078b450073f455d6a
MD5 hash:
fdb69257f55b3831b55c1c506c3ebe05
SHA1 hash:
b63f27d0f65962071d8b4fbad11bd9737a04ac1d
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/a8e3aed1-304f-4944-9c75-303696d59c11/
SH256 hash:
ebaaed27b4824f75954081c97a7b5a24dd2a1c908d8159bdf87c8b367fd714ff
MD5 hash:
a048b9dd4a2e301e0edf4928c737a24c
SHA1 hash:
8fc397a1b50cac63953b2296b840a95d9a4ce365
Detections:
win_formbook_w0
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/a8e3aed1-304f-4944-9c75-303696d59c11/
Parent samples :
a99557a845d8d3d6a2f5d4ee8f51baf5b19960ddb827f1668598942737b8952c
498abceba59d18a6f83bf57dae6cefa9d79de97fc98b73a828640554f8879f10
c53617ff657a785641f0ba07fb40f487eeb6cda98a7edd7e5320afb804d1b4fa
ad27bf984545e4882d173b0ff31f0eb8bd1cb5193658c8a0bdd129f4f4b6607e
3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484
3332610eab9693c63aece8922d85a64e32a6dcf9847f73270ca4cc3136c48968
eb466ca2ee59c8b6cbc104ef8b42ecda98ac1ca14eb2cd2ced5d6f6b8e8d3ab4
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/3905a3dc4fb6f3ec78e34ca229a8c245bc7640f042598576635e37ed011e4484

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:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
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:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
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.

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

Comments