MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4. 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: 19


Intelligence 19 IOCs YARA 7 File information Comments
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SHA256 hash: 43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4
SHA3-384 hash: f7038fd3773501b55b06e705a600d64197695212221f3a6d5c109de46516763986b05c3f9c7a5d4a55d46e5404086d72
SHA1 hash: d3574af3621428399c8eb45ab29e6485da76b8ee
MD5 hash: ca8ad44ffc6f370d0993673865a02309
humanhash: jig-video-mango-failed
File name:ca8ad44ffc6f370d0993673865a02309.exe
Download: download sample
Signature Formbook
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File size:278'450 bytes
First seen:2023-02-14 18:29:38 UTC
Last seen:2023-02-14 20:33:12 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 6144:JYa6dnQ33CyEJjATHGoC9KtlVzKcfs7wW8jestWRQUQIuwBtMYsEp9zA:JYLQ3SyEC1fBKcfhjfWRQzIumtMYVA
TLSH T14B4412117C208053D99707332A35A23E6BEAF626517C9B4F63804B5EB7B2E52D91F353
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 8070f0787cecf400 (2 x Formbook)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
190
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
ca8ad44ffc6f370d0993673865a02309.exe
Verdict:
Malicious activity
Analysis date:
2023-02-14 18:37:50 UTC
Tags:
formbook xloader trojan stealer
Link:
https://app.any.run/tasks/f79caeb8-2194-42ae-ac9d-92576bf33e4d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/365962/
Detection(s):
SecuriteInfo.com.Gen.Variant.Nemesis.17469.23704.32204.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Unauthorized injection to a browser process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/69782/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/63ebd32d4c5f96ec064d8541/reports/bc8898fc-75b4-4328-88a1-74a33adfd095/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4
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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/62b2523a-53ea-43eb-92e7-442011c23b78
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1174727
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to detect sleep reduction / modifications
Detected unpacking (changes PE section rights)
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
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 807531 Sample: NK40fzX4Io.exe Startdate: 14/02/2023 Architecture: WINDOWS Score: 100 34 www.gocobooker.com 2->34 48 Snort IDS alert for network traffic 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus detection for URL or domain 2->52 56 5 other signatures 2->56 12 NK40fzX4Io.exe 19 2->12         started        signatures3 54 System process connects to network (likely due to code injection or exploit) 34->54 process4 file5 32 C:\Users\user\AppData\Local\Temp\mhyph.exe, PE32 12->32 dropped 15 mhyph.exe 12->15         started        process6 signatures7 66 Multi AV Scanner detection for dropped file 15->66 68 Detected unpacking (changes PE section rights) 15->68 70 Maps a DLL or memory area into another process 15->70 72 2 other signatures 15->72 18 mhyph.exe 15->18         started        process8 signatures9 40 Modifies the context of a thread in another process (thread injection) 18->40 42 Maps a DLL or memory area into another process 18->42 44 Sample uses process hollowing technique 18->44 46 Queues an APC in another process (thread injection) 18->46 21 explorer.exe 1 18->21 injected process10 dnsIp11 36 www.finepizzavegesack.info 109.68.33.25, 49713, 80 GD-EMEA-DC-LD5GB United Kingdom 21->36 38 www.adufyuwefjdfuiwefl.site 21->38 58 System process connects to network (likely due to code injection or exploit) 21->58 25 cmmon32.exe 21->25         started        signatures12 process13 signatures14 60 Modifies the context of a thread in another process (thread injection) 25->60 62 Maps a DLL or memory area into another process 25->62 64 Tries to detect virtualization through RDTSC time measurements 25->64 28 cmd.exe 1 25->28         started        process15 process16 30 conhost.exe 28->30         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4/
Threat name:
Win32.Trojan.Nemesis
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Status:
Malicious
First seen:
2023-02-14 08:32:41 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
20 of 25 (80.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=incainaxfvltbccpuxyk4t32446eqfphiymndc6eaxiy3uzf73ka._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:sk29 rat spyware stealer trojan
Link:
https://tria.ge/reports/230214-w5gthafc47/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Formbook payload
Formbook
Unpacked files
SH256 hash:
693b0a58295266892802e42beb232c54c9321933b91c2685117083f9b06d87e2
MD5 hash:
c82f38dc846a00ac2a9ee8724280d3d5
SHA1 hash:
1740b1c5e9ac01d5f2aa3e80f0c957913e1ae2d1
Detections:
FormBook
Create hunting rule
win_formbook_w0
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win_formbook_auto
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win_formbook_g0
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Link:
https://www.unpac.me/results/4afac39f-0fa4-487b-be4d-3c38b42ea936/
Parent samples :
628aa31e938f6407d365b1c833953f4d5b696c08c55b2b9905e2ab6dd724039b
139c10bab25d09231dfa465708c27632ed0618caaa710af0a1f326f80abd365b
9d6e3e7c289c554340dbbe1d6d6962c0f516325ec801e841814c676a936e9fc9
c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7
43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4
7211851b3d55127776d0ddb7f8da0847bc8a453b86015bc4d21f7298cdf6a265
SH256 hash:
600993c065b51f8fc9b3f535944a07dab6b972c36ca41dfe038b3821771e82ce
MD5 hash:
0f877f7984f64d55b36e2f3fa9a7623b
SHA1 hash:
ffb67d50df64b9685b006c5efd74a56fa14a6622
Link:
https://www.unpac.me/results/4afac39f-0fa4-487b-be4d-3c38b42ea936/
SH256 hash:
43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4
MD5 hash:
ca8ad44ffc6f370d0993673865a02309
SHA1 hash:
d3574af3621428399c8eb45ab29e6485da76b8ee
Link:
https://www.unpac.me/results/4afac39f-0fa4-487b-be4d-3c38b42ea936/
Malware family:
XLoader
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/43440434172d/report/overview.html
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/43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4

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:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
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Author:Willi Ballenthin
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Windows_Trojan_Formbook
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Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.
Rule name:win_formbook_w0
Create hunting rule
Author:@malgamy12

File information

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

Web download

Formbook

Executable exe 43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2538881/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/365962/

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