MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4431648599d5c8d9ed6324d5cfaccf83daaecf91b9637b1cf308b8004ca43757. 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
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SHA256 hash: 4431648599d5c8d9ed6324d5cfaccf83daaecf91b9637b1cf308b8004ca43757
SHA3-384 hash: d2b82716bfbbb027790efbb2df9b76d50b7241262a4cbe63e88eed34ccd3ce5887fb02b4e4aa07d5bcd088a67a4e091d
SHA1 hash: 191c0f1539b7f10bac1f03ed2a73195ece5408b2
MD5 hash: cd375ab06baa7632e9c4e7c951228ef1
humanhash: sixteen-friend-nebraska-snake
File name:cd375ab06baa7632e9c4e7c951228ef1.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:299'440 bytes
First seen:2023-03-28 07:10:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 429 x GuLoader)
ssdeep 6144:vYa6GHiMHl4ntbIAq/ggT+8CrV2QLsDddpIm6UqoF+a:vY4HdHlit5WgK+8CrV1LsDdzkUqoV
TLSH T14354232CA3F4CC33DAD756715D78522F5A8DC2281864CB1A53407B4A3D62BC6AF2E367
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 b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
238
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
DETAILS OF BANK TRANSFER USD48908,00.xls
Verdict:
Malicious activity
Analysis date:
2023-03-28 06:19:44 UTC
Tags:
opendir exploit cve-2017-11882 loader formbook xloader trojan stealer
Link:
https://app.any.run/tasks/831861ee-e497-42e0-893d-e5b551296a50

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/378110/
Detection(s):
Sanesecurity.Malware.28947.BadP.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Sending a custom TCP request
Launching cmd.exe command interpreter
Searching for synchronization primitives
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/75367/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
86%
Tags:
comodo nemesis overlay packed remcos shell32.dll
Link:
https://www.filescan.io/uploads/642293069c109cf74b303cdf/reports/16363388-569d-4634-ab9d-f2a063ef6fbb/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/4431648599d5c8d9ed6324d5cfaccf83daaecf91b9637b1cf308b8004ca43757
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/9660f271-d367-4cab-8e3b-a9fe6c3f5093
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1203210
Signature
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
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
Performs DNS queries to domains with low reputation
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: 836135 Sample: PdjzUL6BJv.exe Startdate: 28/03/2023 Architecture: WINDOWS Score: 100 47 Malicious sample detected (through community Yara rule) 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 Yara detected FormBook 2->51 53 3 other signatures 2->53 11 PdjzUL6BJv.exe 19 2->11         started        process3 file4 31 C:\Users\user\AppData\Local\Temp\txvsmr.exe, PE32 11->31 dropped 14 txvsmr.exe 11->14         started        process5 signatures6 65 Multi AV Scanner detection for dropped file 14->65 67 Detected unpacking (changes PE section rights) 14->67 69 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 14->69 71 2 other signatures 14->71 17 txvsmr.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 www.grandnatali.ru 195.161.62.100, 49711, 80 RTCOMM-ASRU Russian Federation 20->33 35 glicotoday.fun 162.241.203.171, 49712, 80 OIS1US United States 20->35 37 4 other IPs or domains 20->37 55 System process connects to network (likely due to code injection or exploit) 20->55 57 Performs DNS queries to domains with low reputation 20->57 24 cmstp.exe 20->24         started        signatures11 process12 signatures13 59 Modifies the context of a thread in another process (thread injection) 24->59 61 Maps a DLL or memory area into another process 24->61 63 Tries to detect virtualization through RDTSC time measurements 24->63 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4431648599d5c8d9ed6324d5cfaccf83daaecf91b9637b1cf308b8004ca43757/
Threat name:
Win32.Trojan.Pwsx
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Status:
Malicious
First seen:
2023-03-28 06:49:11 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=iqywjbmz2xent3ldetk47lgpqpnk5t4rxfrxwhhtbc4aatfeg5lq._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:sa79 rat spyware stealer trojan
Link:
https://tria.ge/reports/230328-hzyceabc8y/
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:
57e109d63f79d3a467078222abcd8ec380995e867b034de74b28dc0ffd211f7f
MD5 hash:
7db58419fb74e71cadb4ba4a640aff4f
SHA1 hash:
987056519492e6395c1b43412458211ba2d3e26e
Link:
https://www.unpac.me/results/da0b3f51-0df7-49a6-b141-ccbcb277ae6a/
SH256 hash:
4431648599d5c8d9ed6324d5cfaccf83daaecf91b9637b1cf308b8004ca43757
MD5 hash:
cd375ab06baa7632e9c4e7c951228ef1
SHA1 hash:
191c0f1539b7f10bac1f03ed2a73195ece5408b2
Link:
https://www.unpac.me/results/da0b3f51-0df7-49a6-b141-ccbcb277ae6a/
Malware family:
XLoader
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4431648599d5/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/4431648599d5c8d9ed6324d5cfaccf83daaecf91b9637b1cf308b8004ca43757

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
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
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Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.
Rule name:win_formbook_w0
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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 4431648599d5c8d9ed6324d5cfaccf83daaecf91b9637b1cf308b8004ca43757

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2588464/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/378110/

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