MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7. 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 7 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7
SHA3-384 hash: 0deaf1e3846341d32bbdfe5476f9c18d89bd71a18fc842d601e2ce7f76599b6a4820da5ba010c8f02d831aa87b13bfe7
SHA1 hash: a6d395aefed628c0ed3014aae2c9313353d38626
MD5 hash: 4a4bf19c9575372904fa2fc82e2d0487
humanhash: louisiana-louisiana-king-july
File name:4a4bf19c9575372904fa2fc82e2d0487
Download: download sample
Signature Formbook
Create hunting rule
File size:579'718 bytes
First seen:2023-02-06 10:57:33 UTC
Last seen:2023-02-06 12:50:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 429 x GuLoader)
ssdeep 12288:nYSeB8OT4gGX3S3BiN9+tFlW25w+jnmTF/AmH:nYzT4gGX3/8N1wgn2F/9
TLSH T1B9C401203E25C92BCAA05AB85E24D3B49B74EE4C2D45DB0BB7F13FBF7D7A5915908210
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 e0d0998dd8d8c8dc (1 x Formbook, 1 x NanoCore)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
197
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
RFQ-06022023.doc
Verdict:
Malicious activity
Analysis date:
2023-02-06 09:31:45 UTC
Tags:
exploit cve-2017-11882 loader formbook xloader
Link:
https://app.any.run/tasks/5513715c-6d18-4eea-a09f-bce73e58d117

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/360800/
Detection(s):
SecuriteInfo.com.Gen.Variant.Nemesis.15914.13911.2039.UNOFFICIAL
Create hunting rule

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
Launching a process
Sending a custom TCP request
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Setting browser functions hooks
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/65719/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
nemesis overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/63e0dd3c2d4f6d560e245df4/reports/1f1f4aee-a1fe-4c43-af65-39af90e6f41f/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7
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/d9d5e5f5-11fb-4077-bab0-5c4dc12d1d54
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1166528
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
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
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 signatures2 2 Behavior Graph ID: 799300 Sample: nzGnYQdRUM.exe Startdate: 06/02/2023 Architecture: WINDOWS Score: 100 47 Malicious sample detected (through community Yara rule) 2->47 49 Antivirus detection for URL or domain 2->49 51 Multi AV Scanner detection for submitted file 2->51 53 3 other signatures 2->53 11 nzGnYQdRUM.exe 19 2->11         started        process3 file4 31 C:\Users\user\AppData\Local\...\xellsbbx.exe, PE32 11->31 dropped 14 xellsbbx.exe 11->14         started        process5 signatures6 63 Multi AV Scanner detection for dropped file 14->63 65 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 14->65 67 Maps a DLL or memory area into another process 14->67 69 Tries to detect virtualization through RDTSC time measurements 14->69 17 xellsbbx.exe 14->17         started        process7 signatures8 39 Modifies the context of a thread in another process (thread injection) 17->39 41 Maps a DLL or memory area into another process 17->41 43 Sample uses process hollowing technique 17->43 45 Queues an APC in another process (thread injection) 17->45 20 explorer.exe 1 17->20 injected process9 dnsIp10 33 td-ccm-168-233.wixdns.net 34.117.168.233, 49708, 80 GOOGLE-AS-APGoogleAsiaPacificPteLtdSG United States 20->33 35 www.mesuretonradon.com 20->35 37 7 other IPs or domains 20->37 55 System process connects to network (likely due to code injection or exploit) 20->55 24 cmd.exe 20->24         started        signatures11 process12 signatures13 57 Modifies the context of a thread in another process (thread injection) 24->57 59 Maps a DLL or memory area into another process 24->59 61 Tries to detect virtualization through RDTSC time measurements 24->61 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7/
Threat name:
Win32.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2023-02-06 10:58:08 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
14 of 26 (53.85%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yqg4ifei56tklzglfhtjrafnfchw2wqk62ksfamchh2uccvya7lq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:sk29 rat spyware stealer trojan
Link:
https://tria.ge/reports/230206-m2tt8agh2z/
Behaviour
Enumerates system info in registry
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
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/1c574130-341f-4a37-8c47-d1c0a33a328c/
Parent samples :
628aa31e938f6407d365b1c833953f4d5b696c08c55b2b9905e2ab6dd724039b
139c10bab25d09231dfa465708c27632ed0618caaa710af0a1f326f80abd365b
9d6e3e7c289c554340dbbe1d6d6962c0f516325ec801e841814c676a936e9fc9
c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7
43440434172d5730884fa5f0ae4f7ae73c4815e74618d18bc405d18dd325fed4
7211851b3d55127776d0ddb7f8da0847bc8a453b86015bc4d21f7298cdf6a265
SH256 hash:
835b5e9077c81bb6ae616e336cb7d53b860870fd2aab2a24c9940354179eb8a0
MD5 hash:
54aec444bb9bf012628b9e9a9a16907d
SHA1 hash:
737d9eca31b1649ce535059657a75f120a99d462
Link:
https://www.unpac.me/results/1c574130-341f-4a37-8c47-d1c0a33a328c/
SH256 hash:
c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7
MD5 hash:
4a4bf19c9575372904fa2fc82e2d0487
SHA1 hash:
a6d395aefed628c0ed3014aae2c9313353d38626
Link:
https://www.unpac.me/results/1c574130-341f-4a37-8c47-d1c0a33a328c/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c40dc41488ef/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/c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7

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:crime_win32_ransom_avaddon_1
Create hunting rule
Author:@VK_Intel
Description:Detects Avaddon ransomware
Reference:https://twitter.com/VK_Intel/status/1300944441390370819
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Windows_Trojan_Formbook
Create hunting rule
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.

File information

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

Web download

Formbook

Executable exe c40dc41488efa6a5e4cb29e69880ad288f6d5a0af69522818239f5410ab807d7

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2531919/
Cape
Cape
https://www.capesandbox.com/analysis/360800/

Comments


Avatar
zbet commented on 2023-02-06 10:57:37 UTC

url : hxxp://farmriterural.com.au/shederct2.1.exe