MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc. 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: 12


Intelligence 12 IOCs YARA 5 File information Comments
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SHA256 hash: 85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc
SHA3-384 hash: 0d43cb1de046336798a5a80d39dfd32cc1b27ecf223aed684d44a415bc335a31cea4274db1ffdc2cdb5b3b22342f7b0f
SHA1 hash: 34325c6ab718bfe49a56b3d6654e1b6a40752443
MD5 hash: a2b445d3524936c2b5da28f809373d57
humanhash: december-undress-queen-lake
File name:85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc
Download: download sample
Signature Formbook
Create hunting rule
File size:103'424 bytes
First seen:2025-06-10 09:06:49 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 3072:gj6hiStSGiV21cX4gBfwiVrSPGdGHtgTjA0:viSM21cXZBfwarSjqjA
Threatray 3'553 similar samples on MalwareBazaar
TLSH T1C1A34C3C23CEEF57C76C6E7CE4E081145BF4C2926543E74A1EA096B61D53BA14E2E287
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 :
279
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc
Verdict:
Malicious activity
Analysis date:
2025-06-10 11:57:25 UTC
Tags:
auto-startup
Link:
https://app.any.run/tasks/84c2327f-1613-497b-a2a2-c53a91e9e779

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/8455/
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.550.6081.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6847f5c98bd5d68a12e75ac8
Tags:
autorun virus micro msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Creating a file in the %AppData% directory
Launching a process
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
Trojan.GenericS
Link:
https://www.hybrid-analysis.com/sample/85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/404e890a-8435-40fe-a648-ea4ab4d13554
Result
Threat name:
FormBook, ResolverRAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1710644
Signature
.NET source code contains potential unpacker
Drops VBS files to the startup folder
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Drops script at startup location
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses threadpools to delay analysis
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Yara detected FormBook
Yara detected ResolverRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1710644 Sample: byPynpsIRO.exe Startdate: 10/06/2025 Architecture: WINDOWS Score: 100 40 www.wjcl.xyz 2->40 42 www.fabu2024b01.xyz 2->42 44 20 other IPs or domains 2->44 64 Suricata IDS alerts for network traffic 2->64 66 Multi AV Scanner detection for submitted file 2->66 68 Yara detected ResolverRAT 2->68 72 8 other signatures 2->72 10 byPynpsIRO.exe 15 5 2->10         started        15 wscript.exe 1 2->15         started        signatures3 70 Performs DNS queries to domains with low reputation 42->70 process4 dnsIp5 46 guilhermegazzola.com.br 170.82.174.30, 443, 49692, 49698 3LCLOUDINTERNETSERVICESLTDA-EPPBR Brazil 10->46 34 C:\Users\user\AppData\Roaming\TypeId.exe, PE32 10->34 dropped 36 C:\Users\user\...\TypeId.exe:Zone.Identifier, ASCII 10->36 dropped 38 C:\Users\user\AppData\Roaming\...\TypeId.vbs, ASCII 10->38 dropped 82 Drops VBS files to the startup folder 10->82 84 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 10->84 86 Writes to foreign memory regions 10->86 90 2 other signatures 10->90 17 InstallUtil.exe 10->17         started        88 Windows Scripting host queries suspicious COM object (likely to drop second stage) 15->88 20 TypeId.exe 14 2 15->20         started        file6 signatures7 process8 signatures9 54 Maps a DLL or memory area into another process 17->54 22 AyYunsgOu.exe 17->22 injected 56 Multi AV Scanner detection for dropped file 20->56 58 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 20->58 60 Writes to foreign memory regions 20->60 62 2 other signatures 20->62 24 InstallUtil.exe 20->24         started        process10 process11 26 attrib.exe 13 22->26         started        signatures12 74 Tries to steal Mail credentials (via file / registry access) 26->74 76 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 26->76 78 Tries to harvest and steal browser information (history, passwords, etc) 26->78 80 4 other signatures 26->80 29 voBjB0s5rsMT6.exe 26->29 injected 32 firefox.exe 26->32         started        process13 dnsIp14 48 www.goldenstreamzxy.pro 31.172.69.92, 49735, 49736, 49737 VOLIA-ASUA Netherlands 29->48 50 www.toplico.top 162.0.239.7, 49711, 49712, 49713 NAMECHEAP-NETUS Canada 29->50 52 7 other IPs or domains 29->52
Score:
90%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc/
Threat name:
ByteCode-MSIL.Trojan.Mardom
Create hunting rule
Status:
Malicious
First seen:
2025-05-23 08:31:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
28 of 36 (77.78%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qxcx2p5r4k65z27baxw662enb2bvhd4pfrnox67zps2fx644utoa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
13de9f72ccf866a8e354bff7f0dc02f834b91121ae20a23247f66eeb9f81f9be
Formbook
26296666d471405f43adaeb839084aa7da3a8149b90349e666a8ce8c5c79ee63
Formbook
8eefd4c22b784988de8fbe5c971738915b98f9c1efbd51731a56219e99bed0da
Formbook
d58e78416502f4c0cb31e3635a182679e2afd461b4baa41b839e3cfe8dd847db
Formbook
d63374d386483c50ad66754aa271868a235eef4f31d7085bd06c1bef92a7f3c1
Formbook
e210bc2b45485f977738894a7ae88b17d8eeacb381eb3055932f09e866a8e766
Formbook
error
Formbook
+ 3'543 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery
Link:
https://tria.ge/reports/250610-k3e2caswdw/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Drops startup file
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/12797a86-286d-4936-9903-ccd0f37a8077
Unpacked files
SH256 hash:
85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc
MD5 hash:
a2b445d3524936c2b5da28f809373d57
SHA1 hash:
34325c6ab718bfe49a56b3d6654e1b6a40752443
Link:
https://www.unpac.me/results/0683924f-1cf9-49e2-866d-df8ea4fad2ac/
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/85c57d3fb1e2bddcebe105edef688d0e83538f8f2c5aebfbf97cb45bfb9ca4dc

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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

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/8455/

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