MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6. 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: 14


Intelligence 14 IOCs YARA 22 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6
SHA3-384 hash: 54d8cede9c3b4342ff6387ee3d9cd4cbc0bf36abc0cc8bce0819385e7e8e65a8169149204a7d8a430a66ed8a54c075d3
SHA1 hash: 0e9d54561607889ef1424e4dda6e400d20b4a011
MD5 hash: df444290777d76abaa4b8ae8706edf02
humanhash: apart-angel-glucose-double
File name:op.scr.exe
Download: download sample
Signature Formbook
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File size:1'010'688 bytes
First seen:2024-04-30 13:31:39 UTC
Last seen:2024-04-30 14:32:33 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:zwglEe171o1+1k155scBRTWgwxPzh77qjz2rITWvFxgMoyYkjl6819R/PB6vgnpO:mnNSW2rzaWjEY9R/PB6Inp3y
TLSH T14125BF507BE8861EE1FF4B7BF0B10411DBF2E8063712DB8D5C90A6AD0C6BB529D416A7
TrID 27.3% (.SCR) Windows screen saver (13097/50/3)
22.0% (.EXE) Win64 Executable (generic) (10523/12/4)
13.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
10.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
9.4% (.EXE) Win32 Executable (generic) (4504/4/1)
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
392
Origin country :
US US
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6.exe
Verdict:
Malicious activity
Analysis date:
2024-04-30 13:34:41 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/2b31338d-d734-474d-8a37-886d5f2021e4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.BackDoor.BladabindiNET.30.31959.4199.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Launching a process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
masquerade packed
Link:
https://www.filescan.io/uploads/6630f2e114fabb16f4042726/reports/96b7b927-7192-4d83-98c7-00b16047bb5b/overview
Verdict:
Malicious
Labled as:
MSILHeracles.Generic
Link:
https://www.hybrid-analysis.com/sample/b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6
Malware family:
Malicious Packer
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/01effff3-f017-4404-a192-2a51e3f85e54
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1434128
Signature
.NET source code references suspicious native API functions
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
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
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6/
Threat name:
Win32.Trojan.Zusy
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Status:
Malicious
First seen:
2024-04-30 13:31:21 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w4pdsbf3kvoca4asxsdkmf3mqacjauu4bf3ofeztkhczhlofv7da._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://tria.ge/reports/240430-qsynlaga9y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Unpacked files
SH256 hash:
4670ba230bf18c8f96e3f4497b7118c54f572022c36f2a49b8eeeb7b96b983de
MD5 hash:
00d132e439d8ae82d50476b31db7e75b
SHA1 hash:
629d9977d543ac4f1696295a3c7f62113c0066ca
Link:
https://www.unpac.me/results/a8565fd8-1f58-4819-ae6e-ab1eaef911b1/
SH256 hash:
c1c823b721025cc3b1b2d1c9ca85af2b1acacbb17c17c326a4e97b55219a35ec
MD5 hash:
ae3c132f8ffbee8f9b7c7a21b1ebbec3
SHA1 hash:
97dc762487e30eb1a15f2ead39403a99b5c115f1
Link:
https://www.unpac.me/results/a8565fd8-1f58-4819-ae6e-ab1eaef911b1/
SH256 hash:
45c7b64a55dca23ee1239649e03a7c361813dbcfc2a0817b0d8e94c907d6ed4b
MD5 hash:
fb1bc19121c4e190d83672bc71b493f0
SHA1 hash:
c3488b969ba578e28ee360be24b6416425a224a0
Link:
https://www.unpac.me/results/a8565fd8-1f58-4819-ae6e-ab1eaef911b1/
SH256 hash:
a261b0d83a6a88ce41c8731d19e924b748cfccb5141e51d596371b4871ac706e
MD5 hash:
8725b8ccbc152a7005e332c0bd53642e
SHA1 hash:
c14d2f1965609dbc483c0db04f9d6e1f3504f31e
Detections:
MALWARE_Win_DLInjector02
Create hunting rule
Link:
https://www.unpac.me/results/a8565fd8-1f58-4819-ae6e-ab1eaef911b1/
SH256 hash:
b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6
MD5 hash:
df444290777d76abaa4b8ae8706edf02
SHA1 hash:
0e9d54561607889ef1424e4dda6e400d20b4a011
Link:
https://www.unpac.me/results/a8565fd8-1f58-4819-ae6e-ab1eaef911b1/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b71e3904bb55/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b71e3904bb555c207012bc86a6176c800490529c0976e2933351c593adc5afc6

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:DebuggerCheck__GlobalFlags
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Formbook
Create hunting rule
Author:kevoreilly
Description:Formbook Payload
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
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Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
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Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
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Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash
Rule name:Windows_Trojan_Formbook
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Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/formbook-adopts-cab-less-approach
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.

  
Delivery method
Other
  
URLhaus
https://urlhaus.abuse.ch/url/2832946/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments