MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4464483a19cb1ad8b1bac91be04eaf972807cdb48f10b1fc5b675563ba1fe350. 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: 11


Intelligence 11 IOCs YARA 4 File information Comments
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SHA256 hash: 4464483a19cb1ad8b1bac91be04eaf972807cdb48f10b1fc5b675563ba1fe350
SHA3-384 hash: fac68053b63f5c613aa6fd47b771ecb495a771cfbcc1654fc48cc7c19147801f7c2538056199d0c98bd73948462b6caa
SHA1 hash: 422eeda5efe766765cc495ac959c60e3fd057262
MD5 hash: 785e83925e42292a41db0e14e08c87c8
humanhash: fanta-freddie-mars-burger
File name:gb.exe
Download: download sample
Signature Formbook
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File size:33'792 bytes
First seen:2022-05-10 18:54:16 UTC
Last seen:2022-05-10 19:54:56 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'751 x AgentTesla, 19'656 x Formbook, 12'248 x SnakeKeylogger)
ssdeep 384:MaSbH3D5ALaWnR/3JdsAeyxfReIaquefRevwIHqfRevoEMpDPni0e4oA+ubCeV9F:c05n+IRsqNRoURCoE8+0eBApbpL
TLSH T189E24A1173E38757E81D0DB0A8AB017129A4AF00E677BA6F14B2BB67CC7215135A7D1F
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon d4d8fe54c6ac98cc (1 x Formbook)
Reporter 604Kuzushi
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
259
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
efd9bf4a93152d6a310bf15550d751b4-sample.zip
Verdict:
Malicious activity
Analysis date:
2022-05-10 18:46:50 UTC
Tags:
encrypted exploit CVE-2017-11882 opendir loader
Link:
https://app.any.run/tasks/e1f9317a-c7a1-4a20-9a92-d1f2bb13892d

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/269527/
Detection(s):
SecuriteInfo.com.W32.AIDetectNet.01.20666.30875.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Running batch commands
Creating a process with a hidden window
Launching a process
Creating a file in the %AppData% subdirectories
Creating a file
Searching for synchronization primitives
Launching cmd.exe command interpreter
Sending a custom TCP request
Setting browser functions hooks
Forced shutdown of a system process
Enabling autorun by creating a file
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/627ab536be0219041a8efc69/reports/e7fd33ce-46a7-4f88-ad8a-d6130ca0d567/overview
Result
Verdict:
UNKNOWN
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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e58ae75c-fa36-4e0a-a02f-48ae8533dad7
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/991329
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for 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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 623830 Sample: gb.exe Startdate: 10/05/2022 Architecture: WINDOWS Score: 100 45 Snort IDS alert for network traffic 2->45 47 Found malware configuration 2->47 49 Malicious sample detected (through community Yara rule) 2->49 51 9 other signatures 2->51 10 gb.exe 15 7 2->10         started        process3 dnsIp4 43 arrozua.cf 192.185.174.180, 49749, 80 UNIFIEDLAYER-AS-1US United States 10->43 35 C:\Users\user\AppData\...35ruicbpv.exe, PE32 10->35 dropped 37 C:\Users\...37ruicbpv.exe:Zone.Identifier, ASCII 10->37 dropped 39 C:\Users\user\AppData\Local\...\gb.exe.log, ASCII 10->39 dropped 55 Creates an undocumented autostart registry key 10->55 57 Writes to foreign memory regions 10->57 59 Injects a PE file into a foreign processes 10->59 15 MSBuild.exe 10->15         started        18 cmd.exe 1 10->18         started        file5 signatures6 process7 signatures8 67 Modifies the context of a thread in another process (thread injection) 15->67 69 Maps a DLL or memory area into another process 15->69 71 Sample uses process hollowing technique 15->71 73 2 other signatures 15->73 20 explorer.exe 15->20 injected 24 conhost.exe 18->24         started        26 timeout.exe 1 18->26         started        process9 dnsIp10 41 www.mersquare.club 20->41 53 System process connects to network (likely due to code injection or exploit) 20->53 28 msdt.exe 20->28         started        signatures11 process12 signatures13 61 Modifies the context of a thread in another process (thread injection) 28->61 63 Maps a DLL or memory area into another process 28->63 65 Tries to detect virtualization through RDTSC time measurements 28->65 31 cmd.exe 1 28->31         started        process14 process15 33 conhost.exe 31->33         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/4464483a19cb1ad8b1bac91be04eaf972807cdb48f10b1fc5b675563ba1fe350/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-05-10 15:54:41 UTC
File Type:
PE (.Net Exe)
Extracted files:
20
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=irseqoqzzmnnrmn2zen6atvps4uaptnur4ild7c3m5kwhoq74nia._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:s4s9 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220510-xkrnmsadcj/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
4464483a19cb1ad8b1bac91be04eaf972807cdb48f10b1fc5b675563ba1fe350
MD5 hash:
785e83925e42292a41db0e14e08c87c8
SHA1 hash:
422eeda5efe766765cc495ac959c60e3fd057262
Link:
https://www.unpac.me/results/1864ce5d-309c-4916-b4f7-b8c7a02556cd/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/4464483a19cb1ad8b1bac91be04eaf972807cdb48f10b1fc5b675563ba1fe350

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:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

Web download

Formbook

Executable exe 4464483a19cb1ad8b1bac91be04eaf972807cdb48f10b1fc5b675563ba1fe350

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/269527/
  
URLhaus
https://urlhaus.abuse.ch/url/2188340/

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