MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f83cdf1780fcb5525b353125751e8495c5d372d6fbd341b06a60f05ac2de2160. 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: f83cdf1780fcb5525b353125751e8495c5d372d6fbd341b06a60f05ac2de2160
SHA3-384 hash: 6d561e1e8d69570caa46c08e15fe6934e756b28529314708f964c59a412a330ea6f400827cba4dfa0f66761198bdbe4b
SHA1 hash: 6e453492ae09c770dd23bc4836c53b7bf7d505d0
MD5 hash: 8e07e2f350449f748eb0d1a9cde22180
humanhash: nebraska-ack-johnny-yellow
File name:pvRnUbWwToDTcwg.exe
Download: download sample
Signature Formbook
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File size:531'456 bytes
First seen:2021-10-29 10:25:30 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 6144:pY6teQzFNImLrfqldJQjgeZ3D3aNjuopps9pm0fhKxrts7qsP8Y2wENviijhGa:weImHwQfDcH04fkCR
Threatray 11'002 similar samples on MalwareBazaar
TLSH T12BB4E04572B8C905D4B503B0D4B9C0F04771BC25D662E60FA9E63CDF3A72782862AB7B
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
135
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
pvRnUbWwToDTcwg.exe
Verdict:
Malicious activity
Analysis date:
2021-10-29 11:45:39 UTC
Tags:
trojan formbook stealer covid19
Link:
https://app.any.run/tasks/1af2b19f-2f2a-4393-8b91-c001e330ea5e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.Win32.Save.a.6999.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
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/d7766d29-b329-42b9-ae76-5a04c07ceff8
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/879231
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found malware configuration
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 domain / URL
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
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
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 511665 Sample: pvRnUbWwToDTcwg.exe Startdate: 29/10/2021 Architecture: WINDOWS Score: 100 38 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->38 40 Multi AV Scanner detection for domain / URL 2->40 42 Found malware configuration 2->42 44 8 other signatures 2->44 10 pvRnUbWwToDTcwg.exe 3 2->10         started        process3 file4 30 C:\Users\user\...\pvRnUbWwToDTcwg.exe.log, ASCII 10->30 dropped 56 Tries to detect virtualization through RDTSC time measurements 10->56 14 pvRnUbWwToDTcwg.exe 10->14         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 17 explorer.exe 14->17 injected process8 dnsIp9 32 www.ddassc.icu 154.222.68.155, 49790, 80 XIAOZHIYUN1-AS-APICIDCNETWORKUS Seychelles 17->32 34 padellacentral.com 185.156.219.144, 49797, 80 SOLTIAES Spain 17->34 36 3 other IPs or domains 17->36 46 System process connects to network (likely due to code injection or exploit) 17->46 21 cmmon32.exe 17->21         started        24 autoconv.exe 17->24         started        signatures10 process11 signatures12 48 Self deletion via cmd delete 21->48 50 Modifies the context of a thread in another process (thread injection) 21->50 52 Maps a DLL or memory area into another process 21->52 54 Tries to detect virtualization through RDTSC time measurements 21->54 26 cmd.exe 1 21->26         started        process13 process14 28 conhost.exe 26->28         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/f83cdf1780fcb5525b353125751e8495c5d372d6fbd341b06a60f05ac2de2160/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2021-10-27 09:46:20 UTC
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7a6n6f4a7s2vewzvgesxkhuesxc5g4ww7pjudmdkmdyfvqw6efqa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
342bac531d9b15d642629e91af8944289af752dd5d70c687e39cefe9a14dc81d
Formbook
4bdd5968c006f979c68ba686942695680950574bba495136b26bdd166d537ede
Formbook
55ed65b48cb66c266459b4bbe35faecbc6c7737a1d89d9df884152c292b4b762
Formbook
5e529cbb901aced8a6af49250afd3d67e059d717d7ecf3edc32e18a9d549361c
Formbook
9f59a9c7a38d8031c5b0829da6c4c10951b1de67adada4f567449d4b6ea8d83c
Formbook
bb6c08035fd7dc06d3ace7952af7bd640c45c548e087dba1deaa45f1861b0077
Formbook
c63cb761da677849b8382eb1d926569f00a04d57f2c789b63e7f2eb2e368a00c
Formbook
e4f478b7cd658cb31bc1192e16ccc1509d552a7229a92fea1a3c6224ee7591a1
Formbook
fc79ac22a40cdc6c5bb5581cdbfde9a72fab2034bcfb1ca04208d5ed5ee0f2cd
Formbook
+ 10'992 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:pn4r rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/211029-mghw8ahghk/
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 WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.wexchange.money/pn4r/
Unpacked files
SH256 hash:
889eace974f67e650585c2fc38f5b6ce8e5e6155c43e4b8d775a1d8786c39d30
MD5 hash:
433b62a1f444bfa06019a6d85a48c914
SHA1 hash:
5f58f62c6eac336924c9d2c3a22cd6bf04822417
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/8e06283b-b7b2-4ca8-ace6-0ce3d8c3edf3/
Parent samples :
fc79ac22a40cdc6c5bb5581cdbfde9a72fab2034bcfb1ca04208d5ed5ee0f2cd
f83cdf1780fcb5525b353125751e8495c5d372d6fbd341b06a60f05ac2de2160
SH256 hash:
12bc55327db8cc1e0ddd6cf8a720b9978f8c87c2024c6a0a88a11d8a7bce7cca
MD5 hash:
5587a5fd4e295b93bc0f1a391ab6325a
SHA1 hash:
1e4df9d7ceac5a897e41aa7b6f6894f6a22ac5c5
Link:
https://www.unpac.me/results/8e06283b-b7b2-4ca8-ace6-0ce3d8c3edf3/
SH256 hash:
4d1ee061c817ea30ca4e461a4f44388662c1c1c2775be2b323858ddbc1679b35
MD5 hash:
1b6d3d31872537cc611ff4322ffc1099
SHA1 hash:
0108adafb207ce044bfb3f7933da45594c545bee
Link:
https://www.unpac.me/results/8e06283b-b7b2-4ca8-ace6-0ce3d8c3edf3/
SH256 hash:
f83cdf1780fcb5525b353125751e8495c5d372d6fbd341b06a60f05ac2de2160
MD5 hash:
8e07e2f350449f748eb0d1a9cde22180
SHA1 hash:
6e453492ae09c770dd23bc4836c53b7bf7d505d0
Link:
https://www.unpac.me/results/8e06283b-b7b2-4ca8-ace6-0ce3d8c3edf3/
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/f83cdf1780fcb5525b353125751e8495c5d372d6fbd341b06a60f05ac2de2160

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
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.

Malspam

Formbook

Executable exe f83cdf1780fcb5525b353125751e8495c5d372d6fbd341b06a60f05ac2de2160

(this sample)

  
Delivery method
Distributed via e-mail attachment

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