MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 101f369f56a480e285e20c7e736fef549b960f755209bb7bc6ad10e8a28d1d75. 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: 9


Intelligence 9 IOCs YARA 3 File information Comments
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SHA256 hash: 101f369f56a480e285e20c7e736fef549b960f755209bb7bc6ad10e8a28d1d75
SHA3-384 hash: f2655eb415f164b16ec37191b362a261b478c9afc06e1e69c350438e714bcea3744f2f30d5a56bde8b94593ac045ff04
SHA1 hash: 62ed460dd5fb696c1012b99b7ea68d55c2913d77
MD5 hash: 6400dc23f9782463ff5777f866aa67d8
humanhash: early-potato-vermont-steak
File name:iRv.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'555'456 bytes
First seen:2021-09-28 17:57:41 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 24576:S41WDojANbs6HYKBAPytfOdBGy66qkya98HeToI6:S4ENbs6HYKBAPytERq9w8Hg
TLSH T15D7541354D6686F7C3EFC66CD04C0A8EDAF2A48776A1CF19DC81DAC60297B0BD28855D
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
106
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
93dbd0b409fe3eb04ee7282d897ddf65.zip
Verdict:
Malicious activity
Analysis date:
2021-09-28 09:35:23 UTC
Tags:
opendir exploit CVE-2017-11882 loader trojan formbook stealer
Link:
https://app.any.run/tasks/620289d6-5557-4dd9-8cf4-af3d14f7a383

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/192709/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1037-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3b4481c5-36fa-4606-b4b3-0aeeecf1976e
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/860124
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
C2 URLs / IPs found in malware configuration
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 492558 Sample: iRv.exe Startdate: 28/09/2021 Architecture: WINDOWS Score: 100 33 www.lauratietzdesign.com 2->33 39 Found malware configuration 2->39 41 Malicious sample detected (through community Yara rule) 2->41 43 Multi AV Scanner detection for submitted file 2->43 45 6 other signatures 2->45 11 iRv.exe 3 2->11         started        signatures3 process4 file5 31 C:\Users\user\AppData\Local\...\iRv.exe.log, ASCII 11->31 dropped 57 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->57 59 Tries to detect virtualization through RDTSC time measurements 11->59 61 Injects a PE file into a foreign processes 11->61 15 iRv.exe 11->15         started        18 iRv.exe 11->18         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 15->63 65 Maps a DLL or memory area into another process 15->65 67 Sample uses process hollowing technique 15->67 69 Queues an APC in another process (thread injection) 15->69 20 explorer.exe 15->20 injected process9 dnsIp10 35 www.laserain.com 20->35 37 HDRedirect-LB7-5a03e1c2772e1c9c.elb.us-east-1.amazonaws.com 3.223.115.185, 49829, 80 AMAZON-AESUS United States 20->37 47 System process connects to network (likely due to code injection or exploit) 20->47 24 WWAHost.exe 20->24         started        signatures11 process12 signatures13 49 Self deletion via cmd delete 24->49 51 Modifies the context of a thread in another process (thread injection) 24->51 53 Maps a DLL or memory area into another process 24->53 55 Tries to detect virtualization through RDTSC time measurements 24->55 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/101f369f56a480e285e20c7e736fef549b960f755209bb7bc6ad10e8a28d1d75/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-28 10:57:52 UTC
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:xb4t evasion rat spyware stealer trojan
Link:
https://tria.ge/reports/210928-wj6kqscda4/
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 UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Deletes itself
Looks for VMWare Tools registry key
Formbook Payload
Looks for VirtualBox Guest Additions in registry
Formbook
Malware Config
C2 Extraction:
http://www.amillionstrandsproduct.com/xb4t/
Unpacked files
SH256 hash:
34e34b7dc5ba45f1b9f6b5e9dbb98384edb8b4f7b970fdb318e72e253360be00
MD5 hash:
e73f2a18cb2c2ec90cccb57031294032
SHA1 hash:
b593af2dc9d4bfec53f21826fade7036447d075d
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/a985ca5b-fb3f-4fbb-9621-1230e074f845/
SH256 hash:
43e38f251dbca9aa20f3470167e5427a7e7a7cdcd25f0b6b045ae8577cd3e345
MD5 hash:
f62ab5d3528d5a3b9e270ea1f9347868
SHA1 hash:
6a74e87711c615adbd9145f829a33f55b7e42dd6
Link:
https://www.unpac.me/results/a985ca5b-fb3f-4fbb-9621-1230e074f845/
SH256 hash:
f076a73b3a93ac71f3fdfe8574153aee2e2a6f3b5468a2ee181cc03e20f1c19d
MD5 hash:
e3e5d092e4ca40ef3b3b6e37fb0edd2c
SHA1 hash:
1bad95db530d6049bbf906fe3f2c170bf9251169
Link:
https://www.unpac.me/results/a985ca5b-fb3f-4fbb-9621-1230e074f845/
SH256 hash:
101f369f56a480e285e20c7e736fef549b960f755209bb7bc6ad10e8a28d1d75
MD5 hash:
6400dc23f9782463ff5777f866aa67d8
SHA1 hash:
62ed460dd5fb696c1012b99b7ea68d55c2913d77
Link:
https://www.unpac.me/results/a985ca5b-fb3f-4fbb-9621-1230e074f845/
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/101f369f56a480e285e20c7e736fef549b960f755209bb7bc6ad10e8a28d1d75

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:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/192709/

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