MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a03cbfeb260c4c92a31e3c5e9d2ef539122ee9b7dc087a9d4db6073959de557. 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 2 File information Comments
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SHA256 hash: 4a03cbfeb260c4c92a31e3c5e9d2ef539122ee9b7dc087a9d4db6073959de557
SHA3-384 hash: d8d7b3d882a7244145f8f833366591f8d460cf9edc352d0e863824a25aa64e3ef2bdb0a9b0e4a364266a20712d75a2f5
SHA1 hash: a45a263471aeee7179dc4a581cd5bb59e662d0c6
MD5 hash: 0d5c12ef90391b5bfc0dedeca59476b6
humanhash: oklahoma-robert-golf-oranges
File name:vbc.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:215'253 bytes
First seen:2022-05-18 09:31:11 UTC
Last seen:2022-05-18 10:40:48 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 6144:LOtIOydsR5FNFhzLOftltWIFaL++X7tlP+5:LOLFXhzLOFxavhl25
TLSH T18D2412015FE0C46BEDF32B335C732723CDFFE5455090A26B57612E09AA7A592A92E307
TrID 48.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
16.4% (.EXE) Win64 Executable (generic) (10523/12/4)
10.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.0% (.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 TeamDreier
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
262
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
vbc.exe
Verdict:
Malicious activity
Analysis date:
2022-05-18 09:44:25 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/06374015-506c-41a3-bc4f-8ef560628ba8

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/272006/
Detection(s):
SecuriteInfo.com.Variant.Jaik.72878.26651.10006.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/18684/overview
Behaviour
MalwareBazaar
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
control.exe overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6284bd1f38fe62fc11b7aace/reports/a164694c-7630-4a81-a26d-a6e302495e22/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/1c308833-4514-4aae-bb95-b25dc1f57497
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/996646
Signature
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)
Found malware configuration
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)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 629142 Sample: vbc.exe Startdate: 18/05/2022 Architecture: WINDOWS Score: 100 38 www.vertriebmitherz.gmbh 2->38 48 Multi AV Scanner detection for domain / URL 2->48 50 Found malware configuration 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 5 other signatures 2->54 12 vbc.exe 19 2->12         started        signatures3 process4 file5 34 C:\Users\user\AppData\...\mujjgudfsx.exe, PE32 12->34 dropped 36 C:\Users\user\...\6cnf4evajeqbsinzugnz, DOS 12->36 dropped 15 mujjgudfsx.exe 1 12->15         started        process6 signatures7 62 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 15->62 64 Tries to detect virtualization through RDTSC time measurements 15->64 66 Injects a PE file into a foreign processes 15->66 18 mujjgudfsx.exe 15->18         started        21 conhost.exe 15->21         started        process8 signatures9 40 Modifies the context of a thread in another process (thread injection) 18->40 42 Maps a DLL or memory area into another process 18->42 44 Sample uses process hollowing technique 18->44 46 Queues an APC in another process (thread injection) 18->46 23 explorer.exe 18->23 injected process10 process11 25 raserver.exe 23->25         started        signatures12 56 Modifies the context of a thread in another process (thread injection) 25->56 58 Maps a DLL or memory area into another process 25->58 60 Tries to detect virtualization through RDTSC time measurements 25->60 28 cmd.exe 1 25->28         started        30 explorer.exe 2 157 25->30         started        process13 process14 32 conhost.exe 28->32         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4a03cbfeb260c4c92a31e3c5e9d2ef539122ee9b7dc087a9d4db6073959de557/
Threat name:
Win32.Trojan.XLoader
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Status:
Malicious
First seen:
2022-05-18 09:32:06 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:xloader campaign:ud5f loader persistence rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220518-lhlh3ababk/
Behaviour
Gathers network information
Modifies Internet Explorer settings
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
Program crash
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Reads user/profile data of web browsers
Uses the VBS compiler for execution
Adds policy Run key to start application
Executes dropped EXE
Xloader Payload
Formbook
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
Unpacked files
SH256 hash:
1853433b991cf282b89c4aec72613e005a28423ff77c48c8f5d7e52388117d6f
MD5 hash:
3195ebc38f9945a5f649942c94873314
SHA1 hash:
0ed30d4cdc39825a22e7ae08c0c3f8df18a46555
Link:
https://www.unpac.me/results/39cbfe85-e6e7-4033-a9d0-70f91cd8b4ec/
SH256 hash:
4a03cbfeb260c4c92a31e3c5e9d2ef539122ee9b7dc087a9d4db6073959de557
MD5 hash:
0d5c12ef90391b5bfc0dedeca59476b6
SHA1 hash:
a45a263471aeee7179dc4a581cd5bb59e662d0c6
Link:
https://www.unpac.me/results/39cbfe85-e6e7-4033-a9d0-70f91cd8b4ec/
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/4a03cbfeb260c4c92a31e3c5e9d2ef539122ee9b7dc087a9d4db6073959de557

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: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.

Cape
Cape
https://www.capesandbox.com/analysis/272006/

Comments