MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83c49019ef9b9520235af445b484a3b3f275729cd92bb960a9264d6704190329. 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 3 File information Comments
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SHA256 hash: 83c49019ef9b9520235af445b484a3b3f275729cd92bb960a9264d6704190329
SHA3-384 hash: 0c165796fdf937e2b2a22a641a966b0b8833176c73319555885d125d89b589c41cc96b63d988e67d598fa85968b127f9
SHA1 hash: 7e6eb3a8bbf4642b6ef93c0b2598f3c07962ab62
MD5 hash: 37252c7963087740ed30ad7475478032
humanhash: avocado-uranus-fanta-montana
File name:37252c7963087740ed30ad7475478032.exe
Download: download sample
Signature Formbook
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File size:864'768 bytes
First seen:2021-09-27 08:32:00 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'453 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:Orb+sYEmYKvoJonpRMDQr8QuSPaAZBp9KDfKgVI+3SIBtEy0dwfGpYZrcDOrtpcN:TTkIFeF+igwgTLCyR5J9LGvuGa+2
Threatray 9'648 similar samples on MalwareBazaar
TLSH T1A305BE09A2AC9B4EC6BF83FAB04351181777ED4A3E0DD7059EC231E80E76BB1495758B
File icon (PE):PE icon
dhash icon 00868ecccce8cc10 (13 x AgentTesla, 9 x Formbook, 2 x NanoCore)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
167
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
37252c7963087740ed30ad7475478032.exe
Verdict:
Suspicious activity
Analysis date:
2021-09-27 09:04:01 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/99ca6787-2656-48dc-b154-c1546d00ec3a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/191975/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1048-2.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/97d9c359-cfa6-4918-8dfd-3fb7507e6bf4
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/858817
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
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
Self deletion via cmd delete
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Suspicious Rundll32 Without Any CommandLine Params
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 491244 Sample: 8athJ8lVXC.exe Startdate: 27/09/2021 Architecture: WINDOWS Score: 100 36 Found malware configuration 2->36 38 Malicious sample detected (through community Yara rule) 2->38 40 Multi AV Scanner detection for submitted file 2->40 42 9 other signatures 2->42 10 8athJ8lVXC.exe 3 2->10         started        process3 file4 30 C:\Users\user\AppData\...\8athJ8lVXC.exe.log, ASCII 10->30 dropped 54 Tries to detect virtualization through RDTSC time measurements 10->54 56 Injects a PE file into a foreign processes 10->56 14 8athJ8lVXC.exe 10->14         started        17 8athJ8lVXC.exe 10->17         started        signatures5 process6 signatures7 58 Modifies the context of a thread in another process (thread injection) 14->58 60 Maps a DLL or memory area into another process 14->60 62 Sample uses process hollowing technique 14->62 64 Queues an APC in another process (thread injection) 14->64 19 explorer.exe 14->19 injected process8 dnsIp9 32 www.adanisantasi.com 154.81.67.156, 49872, 80 DXTL-HKDXTLTseungKwanOServiceHK Seychelles 19->32 34 www.rfmlc.com 19->34 44 System process connects to network (likely due to code injection or exploit) 19->44 23 rundll32.exe 19->23         started        signatures10 process11 signatures12 46 Self deletion via cmd delete 23->46 48 Modifies the context of a thread in another process (thread injection) 23->48 50 Maps a DLL or memory area into another process 23->50 52 Tries to detect virtualization through RDTSC time measurements 23->52 26 cmd.exe 1 23->26         started        process13 process14 28 conhost.exe 26->28         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/83c49019ef9b9520235af445b484a3b3f275729cd92bb960a9264d6704190329/
Threat name:
ByteCode-MSIL.Spyware.Noon
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Status:
Malicious
First seen:
2021-09-27 04:40:07 UTC
AV detection:
6 of 45 (13.33%)
Threat level:
  2/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
043b45f9d94820186d7324c5f6e0fd7661de15ad29104fd43294e2f3839efa06
Formbook
1758a9b18032ce82f4e95249413ee1a8cbade1ef2cb773bc958502801f3af738
Formbook
2ac830fd4c5c4c3522b5cb9983edc13f2580b932875bc9daeb02633b8829fb3b
Formbook
410659d6e76a955d58e88df12ffea3550a57758513630f051c6e66caa343fdad
Formbook
49d82a6b19fe35893b419696bace48db225826ccfa73da61ca22f59f7f045406
Formbook
4c5887639c1dfcc0349690d98e9c8034029a6fa2f2e6bdbba96371bf23ce3301
Formbook
54507294252cb270a6b1944f838eb0428d87fbcfaf05e887126d5754af3ec1fa
Formbook
7e647d064a55731e15f05904b636037d2339e84ca425f53cf752004cd8797468
Formbook
b11a7103f96fb02a8df7ad0e821f0083f48f56cc38df47d8573f39c0d4a19235
Formbook
f03c40561ba64d0797bcf79bfefd015c8d9ca010f1bd67b3d27ffab584a9911e
Formbook
+ 9'638 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:fzsg rat spyware stealer trojan
Link:
https://tria.ge/reports/210927-kfa4wagbe6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.grouplmc.com/fzsg/
Unpacked files
SH256 hash:
83b90d18ad1250a4604f1417f23754c65f834f8c7f1fd29b9f2f634315203fd3
MD5 hash:
4a78ff31505436877b5f3e8378e9baf7
SHA1 hash:
1155e26225d3aae4d49a0645e452d22337f5baa0
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/90fcc6de-d447-4009-928f-167478d71944/
Parent samples :
f03c40561ba64d0797bcf79bfefd015c8d9ca010f1bd67b3d27ffab584a9911e
54507294252cb270a6b1944f838eb0428d87fbcfaf05e887126d5754af3ec1fa
83c49019ef9b9520235af445b484a3b3f275729cd92bb960a9264d6704190329
7e647d064a55731e15f05904b636037d2339e84ca425f53cf752004cd8797468
62ee412123d6e8832cebbf33d84d5695adc4fc2d66f0ec7222d9ccd5f21d4866
3c5d2a990e487ad59a140909b2e6047494467b163f6696be5e247f644e4c3210
b877e6f41d83c546f056fa7f88b5f323d944616a9919025e71971d034b56b592
SH256 hash:
705c6ca4a212d156f72a40353b77f60e4fec21d147ca07bd5656f3e430f6e67e
MD5 hash:
d69d4902cf0070ca98509a7347335f6c
SHA1 hash:
a41af13e13dfe10751be0130a339ecb624a85bfa
Link:
https://www.unpac.me/results/90fcc6de-d447-4009-928f-167478d71944/
SH256 hash:
1a358065c577552fa5a7a956a305313730c0e8f53eacb58c92fd8e0c128e7231
MD5 hash:
189f6ce456c0449569f94322da69a711
SHA1 hash:
889651500afa5edca16ff793d50a75150f832cbe
Link:
https://www.unpac.me/results/90fcc6de-d447-4009-928f-167478d71944/
SH256 hash:
efd2f7657839b252c2fb8489c1ccf610b8e57b471efe049de86a74bc1506775d
MD5 hash:
c3f3e4a9e9ab54bf847a9fc02e7a2160
SHA1 hash:
0853bec33e36ede763927cda0f03129ca763bc07
Link:
https://www.unpac.me/results/90fcc6de-d447-4009-928f-167478d71944/
SH256 hash:
83c49019ef9b9520235af445b484a3b3f275729cd92bb960a9264d6704190329
MD5 hash:
37252c7963087740ed30ad7475478032
SHA1 hash:
7e6eb3a8bbf4642b6ef93c0b2598f3c07962ab62
Link:
https://www.unpac.me/results/90fcc6de-d447-4009-928f-167478d71944/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/83c49019ef9b9520235af445b484a3b3f275729cd92bb960a9264d6704190329

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: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.

Web download

Formbook

Executable exe 83c49019ef9b9520235af445b484a3b3f275729cd92bb960a9264d6704190329

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1599299/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/191975/

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