MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bca421b3a0733bed5bb998a6fd9aac04e11cb6ef6136edc630e87d8494d52a83. 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: 15


Intelligence 15 IOCs YARA 5 File information Comments
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SHA256 hash: bca421b3a0733bed5bb998a6fd9aac04e11cb6ef6136edc630e87d8494d52a83
SHA3-384 hash: bd8522d73d41c0498274da67fcda0cd477b8b891dc9cc6b1cfed8868aae5e1171989d7c3fa5a786b26482a0ac057ab92
SHA1 hash: 416df8c00c2759d6b3f3d5980a8ae18eefe65998
MD5 hash: 168fe4ae99f8a1d598a9b468976ae22c
humanhash: mobile-beer-table-sixteen
File name:DKU0021176pdf.08.12.2022pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:335'253 bytes
First seen:2022-12-08 12:50:04 UTC
Last seen:2022-12-08 14:37:11 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 97318da386948415d08cef4a9006d669 (71 x Formbook, 35 x SnakeKeylogger, 26 x AgentTesla)
ssdeep 6144:9kwY81SjMHcU9YPy7zQKWWSjIDG+IunEdX01NoX6TJwU00KNfL11Qy:0sOUMyvE18DFjuO066fXzzl
TLSH T12C64235AB8C4C07BD1CB4CB17AB35706C2BAE744361E96836F369E7D43A60E34E10299
TrID 92.7% (.EXE) NSIS - Nullsoft Scriptable Install System (846567/2/133)
3.4% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
1.1% (.EXE) Win64 Executable (generic) (10523/12/4)
0.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
0.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
188
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
DKU0021176pdf.08.12.2022pdf.exe
Verdict:
Malicious activity
Analysis date:
2022-12-08 13:17:12 UTC
Tags:
installer formbook xloader trojan stealer
Link:
https://app.any.run/tasks/f889ea2f-9c69-4ce5-a43a-5f07b306a10e

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/344368/
Detection(s):
SecuriteInfo.com.FileRepMalware.29810.26884.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Sending a custom TCP request
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
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6391dd80f6e448d42df7a135/reports/c253327c-19f5-4efe-ab57-7b9ca3d7326a/overview
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/0b5a6fe1-5d61-47e7-a8fe-c4dd408c9fe3
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1130739
Signature
Antivirus detection for dropped file
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)
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
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: 763461 Sample: DKU0021176pdf.08.12.2022pdf.exe Startdate: 08/12/2022 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 4 other signatures 2->53 11 DKU0021176pdf.08.12.2022pdf.exe 19 2->11         started        process3 file4 31 C:\Users\user\AppData\Local\Temp\wwejo.exe, PE32 11->31 dropped 14 wwejo.exe 11->14         started        process5 signatures6 63 Antivirus detection for dropped file 14->63 65 Multi AV Scanner detection for dropped file 14->65 67 Machine Learning detection for dropped file 14->67 69 3 other signatures 14->69 17 wwejo.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 17->20 injected process9 dnsIp10 33 grassi.uno 62.149.128.40, 49700, 80 ARUBA-ASNIT Italy 20->33 35 www.pegasuspadel.club 20->35 37 2 other IPs or domains 20->37 55 System process connects to network (likely due to code injection or exploit) 20->55 24 mstsc.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/bca421b3a0733bed5bb998a6fd9aac04e11cb6ef6136edc630e87d8494d52a83/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-12-08 12:51:06 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xsscdm5aom562w5ztctp3gvmatqrznxpme3o3rrq5b6yjfgvfkbq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:mi08 rat spyware stealer trojan
Link:
https://tria.ge/reports/221208-p2yjhsaa67/
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
Loads dropped DLL
Executes dropped EXE
Formbook payload
Formbook
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/64915479-08f6-4147-85c8-dd1faacf038f
Unpacked files
SH256 hash:
c4c9f9d286ad46b6c7f7be6711e318e27072b15c696b551e70df151d9b195ff4
MD5 hash:
48c9492553b135fa7ab0a7388c333733
SHA1 hash:
20732133e288acfa9cab07c9639dcac9a870fa47
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/ee7e36db-f1ea-4fd2-91f9-e66f67151f78/
Parent samples :
5a7945535c443873fa9822dea1d9b22987cf6abd43c2ebb12900b18d0f956d5e
5f12d75282af46d76785401c4e69c2f2cf3bc35281d337ce541ddc0e0f6f1725
44e3ed577325d16ea39deebd178c78d4022d21120a791f4c875c537fe60be2e1
b8024e250ead416a33d4ef90f4fafe7e2dfbd27e6028302b80896905fad4ac9a
890f77a5e151d7e87c3a0a953f471fb964e00644b798f37b566100d61b5f35ee
6e8de74475e365bdd0f573a03266f447a13f30a76cc2c71d14c1fc5607e1ae5d
bca421b3a0733bed5bb998a6fd9aac04e11cb6ef6136edc630e87d8494d52a83
834e38634cf12e2c06e51b06b8352e03097d29755a3e9510604a29d9940a9d49
SH256 hash:
c53f2ca931dafb163140d6f5ac4e4de39a9153a1d7f86f98cea2e0c55112afa6
MD5 hash:
5e01beb48a64c16dc891e429ef9111de
SHA1 hash:
796e8442c22b4f47f036762ecbde6e72b34750b3
Link:
https://www.unpac.me/results/ee7e36db-f1ea-4fd2-91f9-e66f67151f78/
SH256 hash:
bca421b3a0733bed5bb998a6fd9aac04e11cb6ef6136edc630e87d8494d52a83
MD5 hash:
168fe4ae99f8a1d598a9b468976ae22c
SHA1 hash:
416df8c00c2759d6b3f3d5980a8ae18eefe65998
Link:
https://www.unpac.me/results/ee7e36db-f1ea-4fd2-91f9-e66f67151f78/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/bca421b3a073/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.18
Link:
https://yomi.yoroi.company/submissions/bca421b3a0733bed5bb998a6fd9aac04e11cb6ef6136edc630e87d8494d52a83

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: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.

Malspam

Formbook

Executable exe bca421b3a0733bed5bb998a6fd9aac04e11cb6ef6136edc630e87d8494d52a83

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/344368/

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