MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824. 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: 15


Intelligence 15 IOCs YARA 22 File information Comments
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SHA256 hash: b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824
SHA3-384 hash: 2acf3164cc18ac7dfe69e23da75ff0556a3bbc978fde47b2a8602684127873bac9c3fb48dbfe489d4bcd680b698cdbc9
SHA1 hash: 237c5343512f472994e7ffe9ee7dac71f104d80e
MD5 hash: a79164a22990bded9173eea4eb176154
humanhash: florida-nevada-lithium-pasta
File name:rPO-4500628950_pdf.exe
Download: download sample
Signature Formbook
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File size:1'058'781 bytes
First seen:2024-02-14 12:26:52 UTC
Last seen:2024-02-15 15:29:16 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash d3bf8a7746a8d1ee8f6e5960c3f69378 (247 x Formbook, 75 x AgentTesla, 64 x SnakeKeylogger)
ssdeep 24576:MRmJkcoQricOIQxiZY1ia9aeq+fgwfjiwNNq6FGT:ZJZoQrbTFZY1ia1q+fgwfWwvxFG
Threatray 2'744 similar samples on MalwareBazaar
TLSH T1E035D011B6958477C1A223B09FBAF77A9A3C6E360326C15733C42D777EB06416E1A723
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4504/4/1)
File icon (PE):PE icon
dhash icon 00525232c8cc2408 (10 x Formbook, 4 x RedLineStealer, 1 x AveMariaRAT)
Reporter FXOLabs
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
4
# of downloads :
301
Origin country :
BR BR
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/476128/
Detection(s):
SecuriteInfo.com.FileRepMalware.15205.4926.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% directory
Launching a process
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
DNS request
Connection attempt
Sending an HTTP GET request
Reading critical registry keys
Stealing user critical data
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
autoit fingerprint keylogger lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/65ccb19fac375bec15e6f418/reports/4b4e133d-2097-4bda-92c2-400fd608cba3/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824
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:
Agent Tesla
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/fb36c375-1b68-4111-acfd-72597d1211de
Result
Threat name:
AgentTesla
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1392109
Signature
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to log keystrokes (.Net Source)
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
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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 AgentTesla
Yara detected AntiVM3
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824/
Threat name:
Win32.Spyware.Negasteal
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Status:
Malicious
First seen:
2024-02-14 11:14:48 UTC
File Type:
PE (Exe)
Extracted files:
43
AV detection:
19 of 24 (79.17%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xhmbxytv6okmbkicmnhwawvvsk6kzhxtxwycil2pbmmrex2rzasa._file
Verdict:
malicious
Label(s):
agenttesla_v4
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agenttesla
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Similar samples:
0dd2c1dff009e4a75caee2529234fcc125d32327acaa268eef3b822a444b21a6
Formbook
398c85003f5e9e47b109c4d6fd2efbc9a17f2501c2ebc4ebd0dc3fef2bbd2614
Formbook
a89f1b8bf251aa358c639ec8a4348359239ce6b00541ba41d6911feec404ebd7
Formbook
b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824
Formbook
dd808e48fe04077963b0b9b58b6d162499d8759acf3d046c4c0e1874459f813e
Formbook
e5b2ac7f9314971e967c9c606b75dfb9766442b1dac9b9bd5fb7f5c848d5ff6b
Formbook
+ 2'734 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
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Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240214-pmrgnabd39/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Looks up external IP address via web service
AgentTesla
Unpacked files
SH256 hash:
78d5d3cab432a0a71ca0895155e0d7e909edc256ce81d16d109e91e42780296b
MD5 hash:
22de61913b6b01ccb076fe8f7a3d51ca
SHA1 hash:
af354178740fe21f69cc798c91b04455e76503fc
Detections:
win_agent_tesla_g2
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INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
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Agenttesla_type2
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MALWARE_Win_AgentTeslaV2
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INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
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INDICATOR_EXE_Packed_GEN01
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INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
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Link:
https://www.unpac.me/results/34114132-c0a1-403f-a01f-ca23f082606d/
Parent samples :
398c85003f5e9e47b109c4d6fd2efbc9a17f2501c2ebc4ebd0dc3fef2bbd2614
dd808e48fe04077963b0b9b58b6d162499d8759acf3d046c4c0e1874459f813e
7493d4e7d0dec27d465aa454c60976d7a58e467149b3f4c4b38f19f178bc3ce0
a89f1b8bf251aa358c639ec8a4348359239ce6b00541ba41d6911feec404ebd7
e5b2ac7f9314971e967c9c606b75dfb9766442b1dac9b9bd5fb7f5c848d5ff6b
0dd2c1dff009e4a75caee2529234fcc125d32327acaa268eef3b822a444b21a6
b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824
9242b8a3c6395a2f6bf415f8244cf4e0ded94860543c2b9d4b8bee8d30c5351d
cc62c9aec46b27d6b8ac316375b4959ff2da7d71fd1efdcd07dd64dbf532c7c8
a12d4eb39d013979ccc3f38a318b9efba8c50236d8c335b6a3a77cb16706f8f9
ccdb59873a1a5c0bc377b8854dedf692a10c9c4c9231e0ebff9365ca2e779db9
863819135c6ff8bc850625c3db84239583c687cb0d8e1a6630adcb9e12b9862b
78d5d3cab432a0a71ca0895155e0d7e909edc256ce81d16d109e91e42780296b
SH256 hash:
b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824
MD5 hash:
a79164a22990bded9173eea4eb176154
SHA1 hash:
237c5343512f472994e7ffe9ee7dac71f104d80e
Detections:
AutoIT_Compiled
Create hunting rule
Link:
https://www.unpac.me/results/34114132-c0a1-403f-a01f-ca23f082606d/
Malware family:
AgentTesla
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b9d81be275f3/report/overview.html
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/b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824

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:AgentTeslaV2
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Author:ditekshen
Description:AgenetTesla Type 2 Keylogger payload
Rule name:AgentTeslaV3
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Author:ditekshen
Description:AgentTeslaV3 infostealer payload
Rule name:AutoIt
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Author:Jean-Philippe Teissier / @Jipe_
Description:AutoIT packer
Rule name:AutoIT_Compiled
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Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:INDICATOR_EXE_Packed_GEN01
Create hunting rule
Author:ditekSHen
Description:Detect packed .NET executables. Mostly AgentTeslaV4.
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
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Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
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Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
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Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
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Author:ditekSHen
Description:Detects executables referencing many file transfer clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
Create hunting rule
Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
Rule name:INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
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Author:ditekSHen
Description:Detects executables referencing Windows vault credential objects. Observed in infostealers
Rule name:maldoc_getEIP_method_1
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Author:Didier Stevens (https://DidierStevens.com)
Rule name:malware_Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:MALWARE_Win_AgentTeslaV2
Create hunting rule
Author:ditekSHen
Description:AgenetTesla Type 2 Keylogger payload
Rule name:MD5_Constants
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Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Windows_Trojan_AgentTesla_ebf431a8
Create hunting rule
Author:Elastic Security

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe b9d81be275f394c0a902634f605ab592bcac9ef3bdb0242f4f0b19125f51c824

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/476128/

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