MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 50ef55dfb72ff4f84955243ea50f9fecbadbe9c4fb9cbe3078771e949b2ab589. 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 4 File information Comments
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SHA256 hash: 50ef55dfb72ff4f84955243ea50f9fecbadbe9c4fb9cbe3078771e949b2ab589
SHA3-384 hash: 82ccd5943cb9dad975445dc3dbfe3e9cfbf73d9ce199b5aac9caf31b064297dd25acde79e3404046419f40e435ba695f
SHA1 hash: 03a8baed69d04f97fa9c196c5c4f91f82a581dc5
MD5 hash: 00b9f5861f53212825b150b16cde164c
humanhash: october-three-orange-arizona
File name:Doc 10019100-2010818001001001.PDF.exe
Download: download sample
Signature Formbook
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File size:969'728 bytes
First seen:2021-08-18 18:09:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:WyDc9F3nC0Py3gAhIpuJymCzqtrHyMyFFBc9bGynRbOb4GrGdSc34NlRGEnB:WvuJDtrSMyFFB2GkRbO0CtcIlGS
Threatray 8'216 similar samples on MalwareBazaar
TLSH T19525E5BC19B9B62790B9C765EBE18417F0409C9F3451AD68E4EA23B7433EA5234C723D
dhash icon 4f4f494d4d494f4f (5 x AgentTesla, 1 x Formbook, 1 x AsyncRAT)
Reporter malwarelabnet
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
141
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Doc 10019100-2010818001001001.PDF.exe
Verdict:
Malicious activity
Analysis date:
2021-08-18 18:12:10 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/e3081fcc-b9ee-47e4-8b12-89c55d58f1ab

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/180427/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.998-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:
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.
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c42e616c-a12b-461a-9e87-e8f0b3cc03ad
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/835293
Signature
.NET source code contains very large strings
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Found malware configuration
Initial sample is a PE file and has a suspicious name
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Suspicious Double Extension
Sigma detected: Suspicious Process Start Without DLL
Sigma detected: Suspicious Rundll32 Without Any CommandLine Params
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 467724 Sample: Doc 10019100-20108180010010... Startdate: 18/08/2021 Architecture: WINDOWS Score: 100 37 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->37 39 Found malware configuration 2->39 41 Malicious sample detected (through community Yara rule) 2->41 43 15 other signatures 2->43 10 Doc 10019100-2010818001001001.PDF.exe 3 2->10         started        process3 file4 27 Doc 10019100-20108...1001001.PDF.exe.log, ASCII 10->27 dropped 13 Doc 10019100-2010818001001001.PDF.exe 10->13         started        process5 signatures6 51 Modifies the context of a thread in another process (thread injection) 13->51 53 Maps a DLL or memory area into another process 13->53 55 Sample uses process hollowing technique 13->55 57 Queues an APC in another process (thread injection) 13->57 16 explorer.exe 13->16 injected process7 dnsIp8 29 brurodrigues.com 108.167.188.137, 49737, 80 UNIFIEDLAYER-AS-1US United States 16->29 31 www.protego1.com 104.22.24.238, 49730, 80 CLOUDFLARENETUS United States 16->31 33 3 other IPs or domains 16->33 35 System process connects to network (likely due to code injection or exploit) 16->35 20 rundll32.exe 16->20         started        signatures9 process10 signatures11 45 Modifies the context of a thread in another process (thread injection) 20->45 47 Maps a DLL or memory area into another process 20->47 49 Tries to detect virtualization through RDTSC time measurements 20->49 23 cmd.exe 1 20->23         started        process12 process13 25 conhost.exe 23->25         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/50ef55dfb72ff4f84955243ea50f9fecbadbe9c4fb9cbe3078771e949b2ab589/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2021-08-18 16:48:19 UTC
AV detection:
14 of 27 (51.85%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kdxvlx5xf72pqskveq7kkd475s5nx2oe7ool4mdyo4pjjgzkwweq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
031af74c61339ca40eda7563268d9e2e2803064c141d3c46eb20acad3764f4cc
Formbook
4d2ca668cdde851a6389ee4d0fb089d3e125e2d951dbd7201767174ecafa66ad
Formbook
5043b6f2fb2b01edaf96f2ed748a59957da044dd826bbc3070b5d8c60252b33d
Formbook
66e06710b095c687448e0b08240a99f84dfbfc24882a2c8c9f5b165f58469d8f
Formbook
6c8b4de0f39caa11127409b3ee06f410b0c5642b840f10822ad40af5745690cb
Formbook
72a002cd9cd49afe6f15c5dc2ad7e3f65471b21fd4331202183b87c7ebab7fe3
Formbook
8ca372bae777f7250c22113f1312b38955555f48c0b1ed2aaf0c9326abe06001
Formbook
d457980cebdbfd785a77b0d09249f5bc8cca708f5b5e7fe607f1b538faf977c4
Formbook
+ 8'206 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:wz6a rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/210818-a86jjt5416/
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
Deletes itself
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.setuseny.site/wz6a/
Unpacked files
SH256 hash:
a51d8c29bf0269106fc42c688294299ade89c1c8e57bf78be675389102eb85e5
MD5 hash:
f1b740a14a7e73e5e9e847530fd2e08e
SHA1 hash:
735ef300c5ac3bdb86f87d5b4b1fbf10adb76be7
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/f3e8e814-3a0f-453a-a679-c2ec08301c00/
Parent samples :
72a002cd9cd49afe6f15c5dc2ad7e3f65471b21fd4331202183b87c7ebab7fe3
4d2ca668cdde851a6389ee4d0fb089d3e125e2d951dbd7201767174ecafa66ad
6c8b4de0f39caa11127409b3ee06f410b0c5642b840f10822ad40af5745690cb
66e06710b095c687448e0b08240a99f84dfbfc24882a2c8c9f5b165f58469d8f
031af74c61339ca40eda7563268d9e2e2803064c141d3c46eb20acad3764f4cc
5043b6f2fb2b01edaf96f2ed748a59957da044dd826bbc3070b5d8c60252b33d
ce1c500cc108ae09a1a19f0171e5af77d090669ee75ab3835cc64d888d837db9
8ca372bae777f7250c22113f1312b38955555f48c0b1ed2aaf0c9326abe06001
50ef55dfb72ff4f84955243ea50f9fecbadbe9c4fb9cbe3078771e949b2ab589
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
Link:
https://www.unpac.me/results/f3e8e814-3a0f-453a-a679-c2ec08301c00/
SH256 hash:
46d73ddb9a42b1e8866222bd7399ddc7af917675cb00c8104c0a4aed935ded42
MD5 hash:
8e8f112b9b0a60680adae872575b0085
SHA1 hash:
e1d83b7ac9212e74db2ba0b1a57565a273d0ae37
Link:
https://www.unpac.me/results/f3e8e814-3a0f-453a-a679-c2ec08301c00/
SH256 hash:
50ef55dfb72ff4f84955243ea50f9fecbadbe9c4fb9cbe3078771e949b2ab589
MD5 hash:
00b9f5861f53212825b150b16cde164c
SHA1 hash:
03a8baed69d04f97fa9c196c5c4f91f82a581dc5
Link:
https://www.unpac.me/results/f3e8e814-3a0f-453a-a679-c2ec08301c00/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/50ef55dfb72ff4f84955243ea50f9fecbadbe9c4fb9cbe3078771e949b2ab589

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
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Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
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Rule name:pe_imphash
Create hunting rule
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.

Cape
Cape
https://www.capesandbox.com/analysis/180427/

Comments