MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b91bc68553ee8ce92c9ab04875b8e21703aeb7c63d9f2fe67a73a940c8150d8d. 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: 14


Intelligence 14 IOCs YARA 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b91bc68553ee8ce92c9ab04875b8e21703aeb7c63d9f2fe67a73a940c8150d8d
SHA3-384 hash: 723f30baedf05b90a65fcaa595a929ca16467d06fb1b9bb5de8758fbd791a7bcb1e7e08a2ad6fa7b20830ec068ca4056
SHA1 hash: 675cee7e477263b8f5069e89b424daadd2f811a4
MD5 hash: 16893b49702338aaa8c043450d0f15f1
humanhash: echo-lamp-quiet-rugby
File name:16893b49702338aaa8c043450d0f15f1
Download: download sample
Signature Formbook
Create hunting rule
File size:788'480 bytes
First seen:2021-08-20 07:10:37 UTC
Last seen:2021-08-20 09:47:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:ltQc4pRAz6QrSd/Ysq1bAAKddHpsUCbe:lGcyAmQK/6bhKddJ9Cb
Threatray 5'429 similar samples on MalwareBazaar
TLSH T115F412247344AB4FC07F8E3A98511C00ABB0A5779607F7976CD716DC59CF6EE8E220A6
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
132
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
16893b49702338aaa8c043450d0f15f1
Verdict:
Malicious activity
Analysis date:
2021-08-20 07:11:00 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/cf80b9c3-3b6b-4d5f-8a92-a319620567df

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/180894/
Detection(s):
SecuriteInfo.com.Variant.MSILHeracles.24601.15167.23249.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Sending a UDP request
Unauthorized injection to a recently created process
Creating a 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.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4674efe9-58b3-44e5-ab49-900ea772a618
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/836292
Signature
.NET source code contains very large array initializations
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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)
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
Sigma detected: Suspect Svchost Activity
Sigma detected: Suspicious Svchost Process
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: 468723 Sample: K6JIMk1kkR Startdate: 20/08/2021 Architecture: WINDOWS Score: 100 38 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->38 40 Found malware configuration 2->40 42 Malicious sample detected (through community Yara rule) 2->42 44 11 other signatures 2->44 10 K6JIMk1kkR.exe 3 2->10         started        process3 file4 30 C:\Users\user\AppData\...\K6JIMk1kkR.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 K6JIMk1kkR.exe 10->14         started        17 K6JIMk1kkR.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.terrasombrafarms.com 172.67.216.104, 49741, 80 CLOUDFLARENETUS United States 19->32 34 www.keepcalmpressedserum.com 75.2.18.233, 49738, 80 AMAZON-02US United States 19->34 36 www.media-instagramform.store 19->36 46 System process connects to network (likely due to code injection or exploit) 19->46 23 svchost.exe 19->23         started        signatures10 process11 signatures12 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
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b91bc68553ee8ce92c9ab04875b8e21703aeb7c63d9f2fe67a73a940c8150d8d/
Threat name:
ByteCode-MSIL.Trojan.Heracles
Create hunting rule
Status:
Malicious
First seen:
2021-08-20 03:20:42 UTC
AV detection:
20 of 46 (43.48%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xen4nbkt52gosle2wbehlohcc4b25n6ghwps7zt2oouubsavbwgq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
05c3b01f3f582815a9a5c99845273306a23302342adf5215c7fb817e963cc4e0
Formbook
24e635e80cecd03066225b27fdb524c4542586b22dc820e05f8a02072008c674
Formbook
4d7785dcd99beca572613788bc8b0713ddda6da0c8df321b1402bc38e6880f88
Formbook
78b11874a66b80ec78962b27c352a643d1a11c7f5cf9273f0db06df3f4f7e76c
Formbook
8898f85efa9e25992b6e00da2b7d3338649ebf89d26a92b9bf156618960f5466
Formbook
92737036f323b1c72064c1e8038a942266435048a3ce4847f7e5b29558376c1c
Formbook
9c1d6191badf084113871feba0049fac8a2bb5761136877383579cdcf7cd781a
Formbook
a3703cc485d2a99cfec122203ed2d7dd83274af8bd0b3bcfab3fd590dd5c308c
Formbook
c4d47153405e6371ce64b331bed9178e45c5f54bfba505375d6d8918e68216b9
Formbook
e8be28fabd7cdb2d4e96137dae73bd9b227a86b654c696e9fd401cb37ec68267
Formbook
+ 5'419 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:m3n0 rat spyware stealer trojan
Link:
https://tria.ge/reports/210820-d5fkba5ps6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.terrasombrafarms.com/m3n0/
Unpacked files
SH256 hash:
0c103485bcf379cd87bd1bd29222f0a94aa876897de25f31dfaadf020f0c56f3
MD5 hash:
12ccd5753ada1f927394318a2c5d5714
SHA1 hash:
8a68e018fdf1cb09bcafccfdab43171afdc0a59f
Link:
https://www.unpac.me/results/b76ea874-a7fe-4ead-8fc2-328c6a01b720/
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
Link:
https://www.unpac.me/results/b76ea874-a7fe-4ead-8fc2-328c6a01b720/
SH256 hash:
065a4e18b4dc958450c4570b2dc2114d87ba60e0d8d2059ce5067c2260555c62
MD5 hash:
88b590c562a0845d0cf6ddc27d5eeb6f
SHA1 hash:
3a0b7c08bf6ea72a5394dfe1736a3706ffa9f607
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/b76ea874-a7fe-4ead-8fc2-328c6a01b720/
Parent samples :
e759a4a906a9496f6b9f60b90e7ff49ef812090ce465108f08d32ac916e20cff
f7f5dc4483ba1acdb1e2118ac855a9d4c0b7333749808a11ae69c6e345cdaf6f
c7779ddf9204c4f2ee97e301cfa35ed4c22222bd09299fd95f1eb999384009e0
fb46d9b3de7581c551486adc2ae8c0d2b8fc2dcf049462e7a892981aa265227d
b91bc68553ee8ce92c9ab04875b8e21703aeb7c63d9f2fe67a73a940c8150d8d
9e69e22a336f4e2b17aa52eaa7183bdd92f17f577657c227f37419d38f42f920
205b063d9085337a5339cb50abc7cadf48a0ccefc6fd4e5c923751339cade6af
SH256 hash:
b91bc68553ee8ce92c9ab04875b8e21703aeb7c63d9f2fe67a73a940c8150d8d
MD5 hash:
16893b49702338aaa8c043450d0f15f1
SHA1 hash:
675cee7e477263b8f5069e89b424daadd2f811a4
Link:
https://www.unpac.me/results/b76ea874-a7fe-4ead-8fc2-328c6a01b720/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/b91bc68553ee8ce92c9ab04875b8e21703aeb7c63d9f2fe67a73a940c8150d8d

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
Create hunting rule
Rule name:pe_imphash
Create hunting rule
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.

Web download

Formbook

Executable exe b91bc68553ee8ce92c9ab04875b8e21703aeb7c63d9f2fe67a73a940c8150d8d

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1548362/
Cape
Cape
https://www.capesandbox.com/analysis/180894/

Comments


Avatar
zbet commented on 2021-08-20 07:10:38 UTC

url : hxxp://198.12.91.175/hdfc/vbc.exe