MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 13c9e72370631d555cab3bd6ba12339252fa26915a6a60741668aea478a17cbb. 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 2 File information Comments
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SHA256 hash: 13c9e72370631d555cab3bd6ba12339252fa26915a6a60741668aea478a17cbb
SHA3-384 hash: 17cb4524fb16757f671bdee1efee0992e6abe1b1e89c445095d2535ccabc7b0b91f5c0070717ef63564bed5674455e7a
SHA1 hash: 2066c7939f9ac0e7631ad891ce3c4d6e2e9b92e7
MD5 hash: 47a68facf79cb9c7c1e787870a202db6
humanhash: finch-beer-eight-jig
File name:mu3.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:303'221 bytes
First seen:2022-02-10 05:47:52 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 099c0646ea7282d232219f8807883be0 (476 x Formbook, 210 x Loki, 107 x AgentTesla)
ssdeep 6144:owt7Rwi/8ZVwQWeOwP8w/BeI2r2bPNMXOM2TcXTePvU5AFBvr8L:DPgVwFeOwP8wRLNzej4vU5Mja
Threatray 13'010 similar samples on MalwareBazaar
TLSH T10C54238936C390CBFB57467716B3CBA683FE70041BC4055BA7A42EEFB68039B9105297
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter Anonymous
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
201
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.FakeAV.CXA.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
Creating a file in the %AppData% subdirectories
Сreating synchronization primitives
Launching a process
DNS request
Searching for synchronization primitives
Sending an HTTP GET request
Sending a custom TCP request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control.exe overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6204a71e36f992191835ba84/reports/903629ac-736b-4891-ab5b-3debec947c42/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/5225726a-c8fc-4497-ba8f-142fbdf003d0
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/937509
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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: 569987 Sample: mu3.exe Startdate: 10/02/2022 Architecture: WINDOWS Score: 100 42 www.aanhanger-verhuur.com 2->42 44 hosting-1a.mijndomein-ws.nl 2->44 46 www.rcepbio.com 2->46 62 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->62 64 Found malware configuration 2->64 66 Malicious sample detected (through community Yara rule) 2->66 68 5 other signatures 2->68 11 mu3.exe 19 2->11         started        signatures3 process4 file5 38 C:\Users\user\AppData\Local\...\ykwnuhcc.exe, PE32 11->38 dropped 14 ykwnuhcc.exe 1 2 11->14         started        process6 file7 40 C:\Users\user\AppData\Roaming\...\avay.exe, PE32 14->40 dropped 80 Multi AV Scanner detection for dropped file 14->80 82 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 14->82 84 Tries to detect virtualization through RDTSC time measurements 14->84 86 Injects a PE file into a foreign processes 14->86 18 ykwnuhcc.exe 14->18         started        21 conhost.exe 14->21         started        signatures8 process9 signatures10 54 Modifies the context of a thread in another process (thread injection) 18->54 56 Maps a DLL or memory area into another process 18->56 58 Sample uses process hollowing technique 18->58 60 Queues an APC in another process (thread injection) 18->60 23 explorer.exe 18->23 injected process11 dnsIp12 48 www.hhhsccultum.quest 37.123.118.150, 49798, 80 UK2NET-ASGB United Kingdom 23->48 50 metaversebiometric.com 15.197.142.173, 49758, 80 TANDEMUS United States 23->50 52 15 other IPs or domains 23->52 70 System process connects to network (likely due to code injection or exploit) 23->70 27 msdt.exe 23->27         started        30 avay.exe 23->30         started        32 avay.exe 23->32         started        signatures13 process14 signatures15 72 Modifies the context of a thread in another process (thread injection) 27->72 74 Maps a DLL or memory area into another process 27->74 76 Tries to detect virtualization through RDTSC time measurements 27->76 78 Multi AV Scanner detection for dropped file 30->78 34 WerFault.exe 3 10 30->34         started        36 WerFault.exe 10 32->36         started        process16
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/13c9e72370631d555cab3bd6ba12339252fa26915a6a60741668aea478a17cbb/
Threat name:
Win32.Trojan.GenericML
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Status:
Malicious
First seen:
2022-02-10 05:48:14 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cpe6oi3qmmovkxflhplluertsjjpujurljvga5awncxki6fbps5q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
4d1ac5962b58c0bf6386b85fc1c2029efb0c8d5ccf0054733795eec1ea8b3291
Formbook
7cbd8cc35b03d65491ad01b6a44b84dc047e6663189554201c24dbfbeb81473c
Formbook
94517fa5a38b384136a3027f7588daa605494dd888e4658cb89d521f5fb2d55a
Formbook
af7abd08a5752f55f59e38b2bd9568943ada7d2b23ddc3324b735beebd8846ce
Formbook
bbbb4573dc583a2870aad1d30b310e6e61dae23c5652ae30207a392209d9dd6d
Formbook
d2cc3484cdabe8305bf9afd35530ca1118ca2c308408dc7140c3a94b392b60bb
Formbook
dbc4b30858a2fa9f7001f2347e1cb88f660b8e6651962519b78a7978c6cc2d72
Formbook
ff0b124c254ddf4b3bd11079d2475ff96a1b1e3e2ab6ffe4edbc7443c02c65df
Formbook
+ 13'000 additional samples on MalwareBazaar
Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:formbook family:xloader campaign:b80i loader persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/220210-ghf65aefd5/
Behaviour
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
Drops file in Windows directory
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Xloader Payload
Formbook
Xloader
Unpacked files
SH256 hash:
2b218457ba3335bef95649a395c70968f7b45caebe4aa331f87458c89ea51ba6
MD5 hash:
ea76a65c32483436ea8c926a690a8ecf
SHA1 hash:
8c72c14ecab95b81f145fdbe9a608a02efe1b12f
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/62edef26-5c90-4cd6-800d-9d67b181a658/
Parent samples :
13c9e72370631d555cab3bd6ba12339252fa26915a6a60741668aea478a17cbb
76d07b33364445e08dd5306a4e98d34edb6895a8269e9bb5aa9ef80e1cb83b2e
045637ca6fa907c7d33652dacfd071e9527c97a1a6d7a33a16e74713249ca17d
SH256 hash:
7b312d053de5b6a05ba2812f9e32bf68ea0f593779a4fbe9f0aa59640b3fdeaf
MD5 hash:
7f600d004b689ae58f196dc7dbefc4fc
SHA1 hash:
63c6e92c3c308f70dfd06e0adfe403f50a89d646
Link:
https://www.unpac.me/results/62edef26-5c90-4cd6-800d-9d67b181a658/
SH256 hash:
13c9e72370631d555cab3bd6ba12339252fa26915a6a60741668aea478a17cbb
MD5 hash:
47a68facf79cb9c7c1e787870a202db6
SHA1 hash:
2066c7939f9ac0e7631ad891ce3c4d6e2e9b92e7
Link:
https://www.unpac.me/results/62edef26-5c90-4cd6-800d-9d67b181a658/
Please note that we are no longer able to provide a coverage score for Virus Total.

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
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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.

Comments