MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a. 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: 19


Intelligence 19 IOCs YARA 15 File information Comments
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SHA256 hash: d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a
SHA3-384 hash: c11ea502820dc884c63bced33b010c2b0848cb285e6ebe8bc15555bba1689d02ccbacf6688d11aca0b197ec4a5da8017
SHA1 hash: 05cf4bdb9d75e9d7fd4e43f570b1087e15fc144a
MD5 hash: 6769a1953226b765760c0e80da2c1b27
humanhash: ten-stream-lactose-social
File name:d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a
Download: download sample
Signature Formbook
Create hunting rule
File size:244'736 bytes
First seen:2024-01-18 08:54:52 UTC
Last seen:2024-01-24 14:01:56 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 3072:/XUN2TsscsMTv/B9PM1NpXYPuthwX9wN50B6vf9rBp:/Xe2TsscsMTv/B9PM17phwX9wc6n
Threatray 4'629 similar samples on MalwareBazaar
TLSH T109340F077E88EB15E5A93E3782EF2C2413B2B0C71633C60B6F49AF9514512926D7E72D
TrID 60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.8% (.SCR) Windows screen saver (13097/50/3)
8.7% (.EXE) Win64 Executable (generic) (10523/12/4)
5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
328
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a.exe
Verdict:
Malicious activity
Analysis date:
2024-01-18 09:20:20 UTC
Tags:
evasion agenttesla stealer
Link:
https://app.any.run/tasks/80f94b4d-b37c-4943-a0d4-76cb487f0ef8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
AgentTesla
Create hunting rule
Link:
https://www.capesandbox.com/analysis/471451/
Detection(s):
Win.Packed.Msilperseus-9956591-0
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Win.Packed.Generic-10003641-0
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Win.Packed.Generic-10011753-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Using the Windows Management Instrumentation requests
Sending a custom TCP request
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Creating a window
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
90%
Tags:
anti-vm control evasive fingerprint hacktool hook keylogger lolbin remote replace stealer
Link:
https://www.filescan.io/uploads/65a8e76f94d1aebfb2a5606e/reports/30701694-e09b-4402-847f-fd3cd81ce210/overview
Verdict:
Malicious
Labled as:
MSIL.Krypt.Generic
Link:
https://www.hybrid-analysis.com/sample/d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a
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/e29cdd9d-ea15-4555-8a30-6e8379e402c0
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1376602
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
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 harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected AgentTesla
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1376602 Sample: n1TTFnm6cZ.exe Startdate: 18/01/2024 Architecture: WINDOWS Score: 100 19 mail.guestequipment.com.au 2->19 21 ip-api.com 2->21 23 guestequipment.com.au 2->23 29 Found malware configuration 2->29 31 Malicious sample detected (through community Yara rule) 2->31 33 Antivirus / Scanner detection for submitted sample 2->33 35 7 other signatures 2->35 6 n1TTFnm6cZ.exe 16 5 2->6         started        11 newfile.exe 14 2 2->11         started        13 newfile.exe 2 2->13         started        signatures3 process4 dnsIp5 25 ip-api.com 208.95.112.1, 49706, 49708, 49712 TUT-ASUS United States 6->25 27 guestequipment.com.au 27.54.88.193, 26, 49707, 49709 DREAMSCAPE-AS-APDreamscapeNetworksLimitedAU Australia 6->27 15 C:\Users\user\AppData\Roaming\...\newfile.exe, PE32 6->15 dropped 17 C:\Users\user\...\newfile.exe:Zone.Identifier, ASCII 6->17 dropped 37 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 6->37 39 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 6->39 41 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 6->41 53 2 other signatures 6->53 43 Antivirus detection for dropped file 11->43 45 Multi AV Scanner detection for dropped file 11->45 47 Tries to steal Mail credentials (via file / registry access) 11->47 49 Machine Learning detection for dropped file 11->49 51 Tries to harvest and steal browser information (history, passwords, etc) 13->51 file6 signatures7
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a/
Threat name:
ByteCode-MSIL.Trojan.Whispergate
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Status:
Malicious
First seen:
2024-01-18 08:55:11 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2mjdpiofljiuhl4rynwnvq6isuezilyltr56ntcoheho3etx25va._file
Verdict:
malicious
Label(s):
agenttesla_v4
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agenttesla
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Similar samples:
2690b17a5af1c059abd65a3d1a0d60938a68a2ed98e5831c7b71c03f3a31341f
Formbook
644a614093e652cd1f25a25e72479b6a50c3075cbf557a0549600bdbc521c3a3
Formbook
c7cc0f7a7ed0c73215911f54bc1af9665d7e364d94de0cc691a14adc8fb5e574
Formbook
d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a
Formbook
ff467483f4ab3d57cba04c77901db4dd3c510f6d5d77548f521842f1eaba35e9
Formbook
+ 4'619 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/240118-kvfynsgcfm/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Adds Run key to start application
Looks up external IP address via web service
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Unpacked files
SH256 hash:
d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a
MD5 hash:
6769a1953226b765760c0e80da2c1b27
SHA1 hash:
05cf4bdb9d75e9d7fd4e43f570b1087e15fc144a
Detections:
AgentTesla
Create hunting rule
win_agent_tesla_g2
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
Agenttesla_type2
Create hunting rule
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
Create hunting rule
INDICATOR_EXE_Packed_GEN01
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Link:
https://www.unpac.me/results/b477051e-6299-4267-b231-c820ec4dd566/
Parent samples :
d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a
ff8a33f612d8a5b395c770106457287d423b9b637e1e900e21da789bcfffd761
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d31237a1c55a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a

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:AgentTeslaV3
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Author:ditekshen
Description:AgentTeslaV3 infostealer payload
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
Create hunting rule
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
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
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
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing Windows vault credential objects. Observed in infostealers
Rule name:malware_Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:Multifamily_RAT_Detection
Create hunting rule
Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
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 d31237a1c55a5143af91c36cdac3c89509942f0b9c7be6cc4e390eed9277d76a

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/471451/

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