MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8cef7577e09d894f2136407634962aa9574f00c3c09651cafeffbed4e9b220a. 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: 13


Intelligence 13 IOCs YARA 4 File information Comments
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SHA256 hash: b8cef7577e09d894f2136407634962aa9574f00c3c09651cafeffbed4e9b220a
SHA3-384 hash: 90065356f5f1da41dfe401ea4d2558cbfcafcd8bf4a618d271717c13ee4e9b7208270b0de6a177903b92bc279c58d0b7
SHA1 hash: 994616598f9657eac8c3ebf8ce013aa3dc457864
MD5 hash: 1d93fbbb1895e55356b63fd37073ef62
humanhash: victor-hydrogen-fruit-papa
File name:triage_dropped_file
Download: download sample
Signature Formbook
Create hunting rule
File size:379'416 bytes
First seen:2022-06-21 10:16:31 UTC
Last seen:2022-06-21 10:49:50 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:q5YTETwha81zPYoyB3BOxe9O9BwP3FFpqN:CwzxWBOmO9BwPVPq
Threatray 1'073 similar samples on MalwareBazaar
TLSH T11E84CF5BF68C9B4CC3588AB1B4BA47340391DFA725329B05BDC4FF7C4A7129D6A402DA
TrID 52.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
22.4% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
7.5% (.EXE) Win64 Executable (generic) (10523/12/4)
4.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
File icon (PE):PE icon
dhash icon 6ccccc9cc4d8e8f4 (41 x Formbook, 34 x AgentTesla, 3 x AveMariaRAT)
Reporter malwarelabnet
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
2
# of downloads :
203
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/281901/
Detection(s):
SecuriteInfo.com.Trojan.Siggen18.10652.3403.4737.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a file
Сreating synchronization primitives
Launching cmd.exe command interpreter
DNS request
Searching for synchronization primitives
Sending an HTTP GET request
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated overlay packed wacatac
Link:
https://www.filescan.io/uploads/62b19ab9bc1f1524603c522e/reports/33ff68f4-d2d3-46d3-a370-fb11dc47473c/overview
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/00f86ad7-9622-4690-9f1d-ee911ac72d82
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1016974
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
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 submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 649466 Sample: triage_dropped_file Startdate: 21/06/2022 Architecture: WINDOWS Score: 100 36 ytc5axd6.n.cnamexingzuoy.com 2->36 38 www.syzbf32.xyz 2->38 40 6 other IPs or domains 2->40 48 Snort IDS alert for network traffic 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus detection for URL or domain 2->52 54 8 other signatures 2->54 11 triage_dropped_file.exe 1 2->11         started        signatures3 process4 file5 34 C:\Users\user\...\triage_dropped_file.exe.log, ASCII 11->34 dropped 70 Writes to foreign memory regions 11->70 72 Allocates memory in foreign processes 11->72 74 Injects a PE file into a foreign processes 11->74 76 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 11->76 15 cvtres.exe 11->15         started        signatures6 process7 signatures8 78 Modifies the context of a thread in another process (thread injection) 15->78 80 Maps a DLL or memory area into another process 15->80 82 Sample uses process hollowing technique 15->82 84 2 other signatures 15->84 18 explorer.exe 15->18 injected process9 dnsIp10 42 www.vybaveniprocyklostezky.com 81.91.86.14, 49823, 80 WEB4UCZ Czech Republic 18->42 44 www.nusires.com 68.65.121.68, 49838, 80 NAMECHEAP-NETUS United States 18->44 46 12 other IPs or domains 18->46 56 System process connects to network (likely due to code injection or exploit) 18->56 58 Performs DNS queries to domains with low reputation 18->58 22 explorer.exe 1 12 18->22         started        signatures11 process12 signatures13 60 Tries to steal Mail credentials (via file / registry access) 22->60 62 Tries to harvest and steal browser information (history, passwords, etc) 22->62 64 Modifies the context of a thread in another process (thread injection) 22->64 66 2 other signatures 22->66 25 cmd.exe 2 22->25         started        28 cmd.exe 1 22->28         started        process14 signatures15 68 Tries to harvest and steal browser information (history, passwords, etc) 25->68 30 conhost.exe 25->30         started        32 conhost.exe 28->32         started        process16
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b8cef7577e09d894f2136407634962aa9574f00c3c09651cafeffbed4e9b220a/
Threat name:
ByteCode-MSIL.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2022-06-21 02:59:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
17 of 26 (65.38%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xdhpov36bhmjj4qtmqdwgslcvkkxj4amhqewkhfp57562tu3eifa._file
Verdict:
malicious
Similar samples:
276c6876c250e5ebfd761d05937f5a48f7e4c9a6851293a77ab9bf683c8bbf80
Formbook
39a3f149c23d6a96537aa6efeeedcd2dacb5d92103c736c115ef37a3054a6aa7
Formbook
69b85346ac98c0d0689406cd8a983c42f440600c6d57241c24b3e3b709f6406e
Formbook
6fc02ab37d33d1c6b53b81a7df2bc2abf5bec4651c4a8f93280ed6f46dd38f17
Formbook
a0b5afcab56631d737decbb0378a3aa681f0d053fba8b829a039b452c0be79ed
Formbook
d4aba71c5e7292eeea13722a41fc53166e50a6d7cdf6a1a28b94ca8c1cfc2245
Formbook
ecc62758ef557c2ed6796ad203c9df3a19f2b10edbfa1c3291f7a64f04286233
Formbook
+ 1'063 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:xloader campaign:mt88 loader persistence rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220621-mbcg9acheq/
Behaviour
Gathers network information
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
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of web browsers
Executes dropped EXE
Xloader Payload
Formbook
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
Unpacked files
SH256 hash:
ecbc86e94cf41897f35582466757f81dfa2ec8c16b0e208602d61e3e849a7923
MD5 hash:
e6579554e632fc0dd13a6ceb189790b8
SHA1 hash:
2d88065d552cc5ba3576d1bc97ae0015fae0899f
Link:
https://www.unpac.me/results/f525fd92-9cc4-426f-a246-ed9281e4d27e/
SH256 hash:
491b58cd14ab3e8d5c43f94a562342201d12c0ae0ef4900562525caf02342a3e
MD5 hash:
2940263c7ca3f82b3f9c7936b3128e58
SHA1 hash:
aa233f71dde2ca9030c4ab997245297c45f86fc5
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/f525fd92-9cc4-426f-a246-ed9281e4d27e/
Parent samples :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 hash:
b8cef7577e09d894f2136407634962aa9574f00c3c09651cafeffbed4e9b220a
MD5 hash:
1d93fbbb1895e55356b63fd37073ef62
SHA1 hash:
994616598f9657eac8c3ebf8ce013aa3dc457864
Link:
https://www.unpac.me/results/f525fd92-9cc4-426f-a246-ed9281e4d27e/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b8cef7577e09/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/b8cef7577e09d894f2136407634962aa9574f00c3c09651cafeffbed4e9b220a

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:exploit_any_poppopret
Create hunting rule
Author:Jeff White [karttoon@gmail.com] @noottrak
Description:Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries.
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
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 b8cef7577e09d894f2136407634962aa9574f00c3c09651cafeffbed4e9b220a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2246262/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/281901/

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