MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81398fcf0e9612b507cbdf18df673c828d8e08bd8a6abbfcf00261fe84e0bb8d. 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: 12


Intelligence 12 IOCs YARA 7 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 81398fcf0e9612b507cbdf18df673c828d8e08bd8a6abbfcf00261fe84e0bb8d
SHA3-384 hash: 407c0f7ced2b2ec9457ae84d36de78823f851a7c7c2979293e91ce204e4421542dfb1f8778dfa1a4736cdd97f766d7cb
SHA1 hash: 062237e81055de119a6bd62fefa1101bcdcf7275
MD5 hash: d3f4725b122fb0518b8c1832ba4609eb
humanhash: sink-august-bakerloo-enemy
File name:d3f4725b122fb0518b8c1832ba4609eb
Download: download sample
Signature Formbook
Create hunting rule
File size:409'624 bytes
First seen:2022-06-27 16:16:37 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:RaLdcWVVr1rHAnx+QrT83kLEnaTeOka80bIPqBlWL89:idxHAx+QsP0eOk2Qq08
TLSH T16B94AD2BBA8C5B8CC7089671B0F3463403A2DF972672CA0679C4FFAD0A7175D6A487C5
TrID 69.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.9% (.EXE) Win64 Executable (generic) (10523/12/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.7% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.2% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 6ccccc9cc4d8e8f4 (41 x Formbook, 34 x AgentTesla, 3 x AveMariaRAT)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
247
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/283669/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a custom TCP request
Launching a process
Creating a file
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Setting browser functions hooks
Forced shutdown of a system process
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated overlay packed
Link:
https://www.filescan.io/uploads/62b9d805fb0f8ab80890f94e/reports/9710f75a-a22e-4745-b358-59064c56a8b0/overview
Result
Verdict:
UNKNOWN
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/7b36407a-7d69-41a7-9cda-f6aaf2313971
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1020635
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Injects a PE file into a foreign processes
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 domain / URL
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
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 653131 Sample: CQ5IK1O3TQ Startdate: 27/06/2022 Architecture: WINDOWS Score: 100 33 www.babipiko21.site 2->33 41 Multi AV Scanner detection for domain / URL 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Antivirus detection for URL or domain 2->45 47 8 other signatures 2->47 11 CQ5IK1O3TQ.exe 1 2->11         started        signatures3 process4 file5 31 C:\Users\user\AppData\...\CQ5IK1O3TQ.exe.log, ASCII 11->31 dropped 57 Writes to foreign memory regions 11->57 59 Allocates memory in foreign processes 11->59 61 Injects a PE file into a foreign processes 11->61 63 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 11->63 15 cvtres.exe 11->15         started        18 cvtres.exe 11->18         started        signatures6 process7 signatures8 65 Modifies the context of a thread in another process (thread injection) 15->65 67 Maps a DLL or memory area into another process 15->67 69 Sample uses process hollowing technique 15->69 71 Queues an APC in another process (thread injection) 15->71 20 explorer.exe 15->20 injected 73 Tries to detect virtualization through RDTSC time measurements 18->73 process9 dnsIp10 35 backend360.com 131.153.165.43, 49801, 80 SS-ASHUS United States 20->35 37 www.bense003.xyz 20->37 39 www.backend360.com 20->39 49 System process connects to network (likely due to code injection or exploit) 20->49 51 Performs DNS queries to domains with low reputation 20->51 24 msiexec.exe 20->24         started        signatures11 process12 signatures13 53 Modifies the context of a thread in another process (thread injection) 24->53 55 Maps a DLL or memory area into another process 24->55 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/81398fcf0e9612b507cbdf18df673c828d8e08bd8a6abbfcf00261fe84e0bb8d/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-06-27 16:17:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
22 of 26 (84.62%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qe4y7tyosyjlkb6l34mn6zz4qkgy4cf5rjvlx7hqajq75bhaxogq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:s3s3 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220627-trclhsebb2/
Behaviour
Gathers network information
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
Suspicious use of SetThreadContext
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
072f4f8ae3bf501da1075c9689b1e76d2f3def6d05686be3af0f8a90f965d784
MD5 hash:
9d3c6d818a558a5718f0bc65bb953efb
SHA1 hash:
0631e3047afd1443452de5d323f2910eb371b75f
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Link:
https://www.unpac.me/results/8f4e7222-2b9c-40e6-9e96-2f1bcfa2b4d1/
Parent samples :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 hash:
b29bd59acdc8cb8382ad71e956d5f02cdeb8a8812ff571a337a38721c40cec63
MD5 hash:
85218465fb56f6f03d6b10bbd38fff80
SHA1 hash:
3b0194ec36bfa1fad019d2ef26f8c120df175dd0
Link:
https://www.unpac.me/results/8f4e7222-2b9c-40e6-9e96-2f1bcfa2b4d1/
SH256 hash:
81398fcf0e9612b507cbdf18df673c828d8e08bd8a6abbfcf00261fe84e0bb8d
MD5 hash:
d3f4725b122fb0518b8c1832ba4609eb
SHA1 hash:
062237e81055de119a6bd62fefa1101bcdcf7275
Link:
https://www.unpac.me/results/8f4e7222-2b9c-40e6-9e96-2f1bcfa2b4d1/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/81398fcf0e9612b507cbdf18df673c828d8e08bd8a6abbfcf00261fe84e0bb8d

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:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:MALWARE_Win_zgRAT
Create hunting rule
Author:ditekSHen
Description:Detects zgRAT
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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 81398fcf0e9612b507cbdf18df673c828d8e08bd8a6abbfcf00261fe84e0bb8d

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2251294/
Cape
Cape
https://www.capesandbox.com/analysis/283669/

Comments


Avatar
zbet commented on 2022-06-27 16:16:40 UTC

url : hxxp://192.227.228.34/new/new.exe