MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c35d39c896510b7dc65ebb37f3ab35837f0fe500c8f9927988feacd92d41eb92. 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 5 File information Comments
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SHA256 hash: c35d39c896510b7dc65ebb37f3ab35837f0fe500c8f9927988feacd92d41eb92
SHA3-384 hash: 7db5401b46885c80f47b83b28feaedae33aa672cfe37b8308c79cd12c25f43eb56f947c81e207fe6347cf940524d795b
SHA1 hash: 9cf631ac4eae8b40b5170c9c4d2fdee87b887198
MD5 hash: fe94db3dddb1cbf50762249cb8660f3f
humanhash: thirteen-wyoming-freddie-black
File name:Kvcyqchhbhkahw.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:856'064 bytes
First seen:2023-04-20 10:16:43 UTC
Last seen:2023-05-13 22:52:51 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 3d3dfee0b73b800a9bca6b50b5fb8258 (4 x ModiLoader, 1 x AveMariaRAT, 1 x FormBook)
ssdeep 12288:T8rLgxLKQfJJuXFI3MU+oVv6G57D1llttQCMO+U1xldIuau/T2SAzCk1:wrLgO0023ZQK9CO+U1xldqu/T2SA
Threatray 2'737 similar samples on MalwareBazaar
TLSH T166058D11E1918476E672167CDC1BD2B9A82D7E206E28F80B37E95F4B3EF5650292D3C3
TrID 65.6% (.EXE) Win32 Executable Borland Delphi 7 (664796/42/58)
25.9% (.EXE) Win32 Executable Borland Delphi 6 (262638/61)
4.2% (.EXE) InstallShield setup (43053/19/16)
1.3% (.EXE) Win32 Executable Delphi generic (14182/79/4)
1.2% (.SCR) Windows screen saver (13097/50/3)
File icon (PE):PE icon
dhash icon 92e0b29c9c9983a6 (5 x ModiLoader, 1 x AveMariaRAT, 1 x FormBook)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
239
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Re_ Re_ Proforma Invoice.eml
Verdict:
Malicious activity
Analysis date:
2023-04-13 20:36:11 UTC
Tags:
formbook xloader trojan stealer
Link:
https://app.any.run/tasks/819982e8-f6b7-4e25-b8c0-d83c52bc522f

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/383723/
Detection(s):
SecuriteInfo.com.Variant.Bulz.89663.251.20581.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Creating a file
Launching a process
Creating a process with a hidden window
Searching for the window
Launching the process to change network settings
Searching for synchronization primitives
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Launching cmd.exe command interpreter
Creating a file in the %temp% directory
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/80647/overview
Behaviour
MalwareBazaar
CheckCmdLine
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
dealply keylogger overlay zusy
Link:
https://www.filescan.io/uploads/6441113f26946732737003cd/reports/e52f57bd-062d-4d22-bc86-24e413eee291/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c35d39c896510b7dc65ebb37f3ab35837f0fe500c8f9927988feacd92d41eb92
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:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/d08f1ba5-5a09-43b2-abc2-929716aa7b55
Result
Threat name:
FormBook, DBatLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1217887
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates a thread in another existing process (thread injection)
Detected FormBook malware
Found malware configuration
Injects a PE file into a foreign processes
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 domain / URL
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
Sigma detected: Steal Google chrome login data
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected DBatLoader
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 850835 Sample: Kvcyqchhbhkahw.exe Startdate: 20/04/2023 Architecture: WINDOWS Score: 100 58 Multi AV Scanner detection for domain / URL 2->58 60 Found malware configuration 2->60 62 Malicious sample detected (through community Yara rule) 2->62 64 8 other signatures 2->64 10 Kvcyqchhbhkahw.exe 1 18 2->10         started        process3 dnsIp4 52 web.fe.1drv.com 10->52 54 ph-files.fe.1drv.com 10->54 56 2 other IPs or domains 10->56 44 C:\Users\Public\Libraries\Kvcyqchh.exe, PE32 10->44 dropped 46 C:\Users\...\Kvcyqchh.exe:Zone.Identifier, ASCII 10->46 dropped 80 Writes to foreign memory regions 10->80 82 Allocates memory in foreign processes 10->82 84 Creates a thread in another existing process (thread injection) 10->84 86 Injects a PE file into a foreign processes 10->86 15 colorcpl.exe 2 10->15         started        file5 signatures6 process7 signatures8 88 Modifies the context of a thread in another process (thread injection) 15->88 90 Maps a DLL or memory area into another process 15->90 92 Sample uses process hollowing technique 15->92 94 2 other signatures 15->94 18 explorer.exe 10 9 15->18 injected process9 dnsIp10 50 www.shjyutie.com 18->50 66 System process connects to network (likely due to code injection or exploit) 18->66 22 svchost.exe 18->22         started        26 Kvcyqchh.exe 18->26         started        28 Kvcyqchh.exe 18->28         started        signatures11 process12 file13 40 C:\Users\user\AppData\...\8LOlogrv.ini, data 22->40 dropped 42 C:\Users\user\AppData\...\8LOlogri.ini, data 22->42 dropped 68 Detected FormBook malware 22->68 70 Tries to steal Mail credentials (via file / registry access) 22->70 72 Tries to harvest and steal browser information (history, passwords, etc) 22->72 78 3 other signatures 22->78 30 cmd.exe 22->30         started        74 Antivirus detection for dropped file 26->74 76 Multi AV Scanner detection for dropped file 26->76 34 colorcpl.exe 26->34         started        36 colorcpl.exe 28->36         started        signatures14 process15 file16 48 C:\Users\user\AppData\Local\Temp\DB1, SQLite 30->48 dropped 96 Tries to harvest and steal browser information (history, passwords, etc) 30->96 38 conhost.exe 30->38         started        signatures17 process18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c35d39c896510b7dc65ebb37f3ab35837f0fe500c8f9927988feacd92d41eb92/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2023-04-11 22:51:21 UTC
File Type:
PE (Exe)
Extracted files:
54
AV detection:
13 of 37 (35.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ynottsewkefx3rs6xm37hkzvqn7q7ziazd4ze6mi72wnslkb5oja._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
195c2339e793e897abd2ceb7fc3d675f7af1fb4b60fdf1a8d736fb4c3e35372f
FormBook
59162d6533d5d56ceedd3f8a24e85e75cd198c72db5719188a4a582752d7fbe4
FormBook
7e1f215877d458883e98c874ce1226b561f0ddd5114dad6baef44d66d33a98a6
FormBook
ab2af768a15bf36f36de51389f4ee62cb0816779473a53716cee76734bda7538
FormBook
b3779eff9ed2b1a0b2a980e760ce677e9fc158876691ba72da0a809bb73b51f8
FormBook
d1798c288b296009d8049ca5364b29b079d59fadc870af65e92fe5fa23bdcec5
FormBook
d346f44b099d0aa4226f6a6340e660e003d5293ee68c4d4fe38b301754c271fb
FormBook
e6303d0730eaecd16e8a3becf77fce3d5da13155d2e27e102ecc2b700ad42814
FormBook
f51bdb3c0026435904048abffb411be8b57143de59d0e66a3e2dfa3f2e5692ad
FormBook
facf2fbbac21edd7550d00e6f6916f9ee598f9c3bdc2ca0feb288c139d687672
FormBook
+ 2'727 additional samples on MalwareBazaar
Result
Malware family:
modiloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:modiloader campaign:3nop persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/230420-mbebvabb9t/
Behaviour
Gathers network information
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of web browsers
Formbook payload
ModiLoader Second Stage
Formbook
ModiLoader, DBatLoader
Unpacked files
SH256 hash:
9c9a525a861642da6c4239a3c7b5264a4691ac3016efbcb83ecb1faff75532f1
MD5 hash:
a5fd04cfbb5fe91ac98204a158bd01a7
SHA1 hash:
3772c8e53baa4acafac810123c81f5a440f0e490
Detections:
win_dbatloader_g1
Create hunting rule
Link:
https://www.unpac.me/results/1de68fc0-5c55-4c38-aff3-994bab29a08a/
Parent samples :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 hash:
c35d39c896510b7dc65ebb37f3ab35837f0fe500c8f9927988feacd92d41eb92
MD5 hash:
fe94db3dddb1cbf50762249cb8660f3f
SHA1 hash:
9cf631ac4eae8b40b5170c9c4d2fdee87b887198
Detections:
DbatLoaderStage1
Create hunting rule
Link:
https://www.unpac.me/results/1de68fc0-5c55-4c38-aff3-994bab29a08a/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c35d39c89651/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c35d39c896510b7dc65ebb37f3ab35837f0fe500c8f9927988feacd92d41eb92

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:CMD_Ping_Localhost
Create hunting rule
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Typical_Malware_String_Transforms
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Typical_Malware_String_Transforms_RID3473
Create hunting rule
Author:Florian Roth
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research

File information

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

Malspam

FormBook

Executable exe c35d39c896510b7dc65ebb37f3ab35837f0fe500c8f9927988feacd92d41eb92

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/383723/

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