MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b57fd7fbcf61b5c21dc101fe95bcd0d7a0a9ade3cdc75597b7352c3d70e00ba9. 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: 18


Intelligence 18 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b57fd7fbcf61b5c21dc101fe95bcd0d7a0a9ade3cdc75597b7352c3d70e00ba9
SHA3-384 hash: 4b314dbf0b10c715af0805455c52740252893ec59c338e67a362ec200e8447975b3374198932a00157c0240f66b921a3
SHA1 hash: 8e9ea9d137c85b040b24a256ac44d40da01aa798
MD5 hash: c0489c3f6adc854c3b9f78fbdde1da55
humanhash: enemy-august-mobile-october
File name:dekont.pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:280'294 bytes
First seen:2023-04-18 11:37:48 UTC
Last seen:2023-04-21 12:42:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 6144:/Ya60NNBW57Zoq2xCMKjjzOR7wfE03DKSP2hLHi5N75+RKon:/YSNNBWDoHdKzORIv3WSP2RM+h
Threatray 2'696 similar samples on MalwareBazaar
TLSH T1655412247BE0D0ABFDE347746EB517205FBEE5334899435B17304A7A3A22152D81EB63
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 geo TUR

Intelligence

File Origin
# of uploads :
2
# of downloads :
222
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
dekont.pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-04-18 11:44:37 UTC
Tags:
formbook xloader trojan stealer
Link:
https://app.any.run/tasks/c2e5b6e9-182d-4557-a200-6749d3e4e7bd

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/383009/
Detection(s):
Sanesecurity.Malware.28947.BadP.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
Sending a custom TCP request
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/80188/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
comodo nemesis overlay packed remcos shell32.dll
Link:
https://www.filescan.io/uploads/643e811dda9df612bb188d72/reports/0ef1597b-f43d-46a5-afbb-5dd0f625a501/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b57fd7fbcf61b5c21dc101fe95bcd0d7a0a9ade3cdc75597b7352c3d70e00ba9
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/2c176d27-b93a-4600-8f62-cf1b241692bb
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1216288
Signature
Antivirus detection for URL or domain
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)
Found malware configuration
Initial sample is a PE file and has a suspicious name
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
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 849213 Sample: dekont.pdf.exe Startdate: 18/04/2023 Architecture: WINDOWS Score: 100 47 Found malware configuration 2->47 49 Malicious sample detected (through community Yara rule) 2->49 51 Antivirus detection for URL or domain 2->51 53 7 other signatures 2->53 11 dekont.pdf.exe 19 2->11         started        process3 file4 31 C:\Users\user\AppData\Local\Temp\htpcxg.exe, PE32 11->31 dropped 14 htpcxg.exe 11->14         started        process5 signatures6 63 Multi AV Scanner detection for dropped file 14->63 65 Detected unpacking (changes PE section rights) 14->65 67 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 14->67 69 2 other signatures 14->69 17 htpcxg.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 4 6 17->20 injected process9 dnsIp10 33 www.borne-selfie-valence.com 213.186.33.5, 49715, 80 OVHFR France 20->33 35 www.disegnofloors.com 35.209.193.6, 49714, 80 GOOGLE-2US United States 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 wscript.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/b57fd7fbcf61b5c21dc101fe95bcd0d7a0a9ade3cdc75597b7352c3d70e00ba9/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2023-04-18 10:22:01 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wv75p66pmg24ehobah7jlpgq26qktlpdzxdvlf5xguwd24habouq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
539d920211675f7cc535698b9223aae7d732e46d747bae86c00234e8b6dcb3ff
Formbook
94dab2dcd48fb66d3a0836a2711083a5ee738603de0b47fecfed4e23711def16
Formbook
a1f1dfe6d2c7d5010bd2d3eef64f83695307f83e12f05aa89762113fd13a9456
Formbook
ca0e3813c0c1155a09e9fb2f0e9133fd61c8438d875a3ed797b9bdf3ad79c5fb
Formbook
cc2ffcb49e5ff1b4f1be2c0c8f5bef3cf51caeef5fcd8be8a6367174b7dd8063
Formbook
dc8ac0ea14e9f418a35bd58f5f495282c9eb6a0e5331c197daf21f69f6d29222
Formbook
e0917d732b7c34e4ff60f30a9115ad84dbf3eb15be3301db9bb7297f1ac8581c
Formbook
eea29ccf59fa6a6aa5a3c14360db6068144f14601d987ec37ea21a35cdac9430
Formbook
+ 2'686 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:me29 rat spyware stealer trojan
Link:
https://tria.ge/reports/230418-nrq61sch5s/
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
Blocklisted process makes network request
Formbook payload
Formbook
Unpacked files
SH256 hash:
c820af03e2fe660e4c17b4e7961c70d392309597c458460a97ef1cba191f696c
MD5 hash:
87b0835f80c0249270dff52c54ac3049
SHA1 hash:
849c931654700cd1f76f4a3653146603cc4a5115
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/148f8859-bb21-4a80-940b-db0afa01c301/
Parent samples :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 hash:
8e34dcccf4ac49478c4a4c17aff41686f886f9d8cd489ec18d403a2d50a643b3
MD5 hash:
dea68431945ca182fa4c349ce7f2270f
SHA1 hash:
b342bb7ef671887d1e1e28ebd6f5d8fb56148c00
Link:
https://www.unpac.me/results/148f8859-bb21-4a80-940b-db0afa01c301/
SH256 hash:
b57fd7fbcf61b5c21dc101fe95bcd0d7a0a9ade3cdc75597b7352c3d70e00ba9
MD5 hash:
c0489c3f6adc854c3b9f78fbdde1da55
SHA1 hash:
8e9ea9d137c85b040b24a256ac44d40da01aa798
Link:
https://www.unpac.me/results/148f8859-bb21-4a80-940b-db0afa01c301/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b57fd7fbcf61/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/b57fd7fbcf61b5c21dc101fe95bcd0d7a0a9ade3cdc75597b7352c3d70e00ba9

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
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.

Malspam

Formbook

Executable exe b57fd7fbcf61b5c21dc101fe95bcd0d7a0a9ade3cdc75597b7352c3d70e00ba9

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/383009/

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