MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21437b52392e511f561988e79287444a65d5c78a251d2e54a92703be7fa5cf2f. 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: 8


Intelligence 8 IOCs YARA 2 File information Comments
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SHA256 hash: 21437b52392e511f561988e79287444a65d5c78a251d2e54a92703be7fa5cf2f
SHA3-384 hash: 4deea973234da4011c5ba29d17447595178ceb4057df075a06dbeeb89be6d32db8e9515e89721fd216c9ce40fabd47e5
SHA1 hash: 6538489579ee4fac05e243f5f6961c1b17cb11fc
MD5 hash: 1b4b4bd8d5e3b1f984e4d913ee93e25b
humanhash: batman-eight-salami-arkansas
File name:IMAGE20210524_1077620091.exe
Download: download sample
Signature Formbook
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File size:958'976 bytes
First seen:2021-05-25 06:18:03 UTC
Last seen:2021-05-25 07:07:36 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'454 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:0dn8ol9bAgQtf6heEShxjA/HJF5idq7Tq29s+6TXbNS8kwtl7COHTukns+:MrMgo6hephxjAHJKdfFL8YCFks+
Threatray 31 similar samples on MalwareBazaar
TLSH 1E15252F502AF222C168C27D06C4742BED90DFF36131AD54A8D73F895638E4D799E26E
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
102
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/161631/
Detection(s):
SecuriteInfo.com.Scr.Malcodegdn30.21638.23075.UNOFFICIAL
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Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
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.
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/792083
Signature
.NET source code contains very large strings
Adds a directory exclusion to Windows Defender
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 424479 Sample: IMAGE20210524_1077620091.exe Startdate: 25/05/2021 Architecture: WINDOWS Score: 100 54 Found malware configuration 2->54 56 Malicious sample detected (through community Yara rule) 2->56 58 Multi AV Scanner detection for submitted file 2->58 60 9 other signatures 2->60 10 IMAGE20210524_1077620091.exe 7 2->10         started        process3 file4 40 C:\Users\user\AppData\Roaming\meGNxsNoI.exe, PE32 10->40 dropped 42 C:\Users\...\meGNxsNoI.exe:Zone.Identifier, ASCII 10->42 dropped 44 C:\Users\user\AppData\Local\...\tmpF0CD.tmp, XML 10->44 dropped 46 C:\Users\...\IMAGE20210524_1077620091.exe.log, ASCII 10->46 dropped 62 Uses schtasks.exe or at.exe to add and modify task schedules 10->62 64 Adds a directory exclusion to Windows Defender 10->64 66 Tries to detect virtualization through RDTSC time measurements 10->66 68 Injects a PE file into a foreign processes 10->68 14 IMAGE20210524_1077620091.exe 10->14         started        17 powershell.exe 26 10->17         started        19 powershell.exe 24 10->19         started        21 2 other processes 10->21 signatures5 process6 signatures7 70 Modifies the context of a thread in another process (thread injection) 14->70 72 Maps a DLL or memory area into another process 14->72 74 Sample uses process hollowing technique 14->74 76 Queues an APC in another process (thread injection) 14->76 23 explorer.exe 14->23 injected 25 conhost.exe 17->25         started        27 conhost.exe 19->27         started        29 conhost.exe 21->29         started        31 conhost.exe 21->31         started        process8 process9 33 cmmon32.exe 23->33         started        signatures10 48 Modifies the context of a thread in another process (thread injection) 33->48 50 Maps a DLL or memory area into another process 33->50 52 Tries to detect virtualization through RDTSC time measurements 33->52 36 cmd.exe 33->36         started        process11 process12 38 conhost.exe 36->38         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/21437b52392e511f561988e79287444a65d5c78a251d2e54a92703be7fa5cf2f/
Threat name:
ByteCode-MSIL.Spyware.Noon
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Status:
Malicious
First seen:
2021-05-25 04:11:56 UTC
AV detection:
4 of 46 (8.70%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=efbxwurzfzir6vqzrdtzfb2ejjs5lr4keuos4vfje4b3475fz4xq._file
Verdict:
unknown
Similar samples:
19848693581afe396fc1404f0da7df9fb1f46e6b9f0354188867ac890ec1bcb0
Formbook
1c42bd094eeb6df10d17cb2fc16a7e167e38ee01d273f7c31ddf4775e015d59c
Formbook
27bec5b0582b3447dfbf1e2cca8afae778532caa31b449bebb434d5468cbe3b7
Formbook
3b0d7f30b2bf323e1c7414bc50b55e2c3b5f6018a78b9002025f1962603ab2bd
Formbook
419866e243e8c421e9ddaa512c0aaabb4454b57e684855d23576daa570a58957
Formbook
6001be9c4cdedd1240a0388bf3939a460c03a4b70034369a385cf29f2e0258b1
Formbook
6bb732e1c22295b2fa6970a286225d14bd7c6fabef714f9b20c3a622bb8e7645
Formbook
9cb553dce1f526b4a7652dd79e40c83996c3fc3362a08bf5289b64f9fa70bb3e
Formbook
9df937adf6a22c071b3d975135efa00bee0a9ad5fb22e6ef37c43dd79d90b030
Formbook
a00a6fe53b7e8d3f5ab9d8b8ab2119c9d3fcbe2b41a1fad6b29ed37e493a2ba0
Formbook
+ 21 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210525-9bs1jhslfs/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.merckcbd.com/dei5/
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/21437b52392e511f561988e79287444a65d5c78a251d2e54a92703be7fa5cf2f

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
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

Executable exe 21437b52392e511f561988e79287444a65d5c78a251d2e54a92703be7fa5cf2f

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/161631/

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