MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 42b875ba2d7d655249fb6a50f8106b7070fcba963a9030f72558b1632e0c6a6c. 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: 16
| SHA256 hash: | 42b875ba2d7d655249fb6a50f8106b7070fcba963a9030f72558b1632e0c6a6c |
|---|---|
| SHA3-384 hash: | bdb23b64554b85c6eeed8c7d55a5b411d25bfe4715928b1bba254400b5e9786b7329f23a4adabacd732c5e4968590634 |
| SHA1 hash: | c9107b01689d61e4a28d248673172f761ec30b10 |
| MD5 hash: | d9d0d9017bda7878be11f91b928123fd |
| humanhash: | gee-lithium-sodium-minnesota |
| File name: | d9d0d9017bda7878be11f91b928123fd |
| Download: | download sample |
| Signature | Formbook |
| File size: | 862'208 bytes |
| First seen: | 2024-02-14 09:55:35 UTC |
| Last seen: | 2024-02-14 14:10:25 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'452 x Formbook, 12'202 x SnakeKeylogger) |
| ssdeep | 12288:me69UNW+A0BP+T6r/IO9ywjI4DBbWry2boplbuvCxefwB351UuzLolq5Ic:mer5T/IsjIubQbMlbifwBzPoMu |
| Threatray | 6'049 similar samples on MalwareBazaar |
| TLSH | T17A05BD14B3F91619F1FF0B7BE5B1102686BAFE0ABD12C74E1951568E0C66B80CDA1B73 |
| TrID | 30.2% (.EXE) Win64 Executable (generic) (10523/12/4) 18.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 14.5% (.EXE) Win16 NE executable (generic) (5038/12/1) 12.9% (.EXE) Win32 Executable (generic) (4504/4/1) 5.9% (.ICL) Windows Icons Library (generic) (2059/9) |
| Reporter |  zbetcheckin |
| Tags: | 32 exe FormBook |
Intelligence
File Origin
# of uploads :
3
# of downloads :
370
Origin country :
FRVendor Threat Intelligence
Detection:
AgentTesla
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
DNS request
Connection attempt
Sending an HTTP GET request
Reading critical registry keys
Sending a custom TCP request
Creating a window
Stealing user critical data
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
crypto lolbin packed remote
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
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
Verdict:
Malicious
Result
Threat name:
AgentTesla
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
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
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
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
Snort IDS alert for network traffic
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:
Score:
100%
Verdict:
Malware
File Type:
PE
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Status:
Malicious
First seen:
2024-02-14 09:56:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
20 of 24 (83.33%)
Threat level:
2/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
agenttesla_v4
agenttesla
Similar samples:
+ 6'039 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Score:
10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
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:
45c7b64a55dca23ee1239649e03a7c361813dbcfc2a0817b0d8e94c907d6ed4b
MD5 hash:
fb1bc19121c4e190d83672bc71b493f0
SHA1 hash:
c3488b969ba578e28ee360be24b6416425a224a0
SH256 hash:
f7c90b2b13bd2fc22026bc0c0b00aeb3a8c4a31b7eba4e3fb55b718be1e3e2c5
MD5 hash:
60da47393c23619293ecedf801bb0df3
SHA1 hash:
70b1eaac0d07f237e6e99d2c7db8d72610b3c510
SH256 hash:
26496ad0f56931d14f2389d5f592dff4b88d5e8cac1f2e8a77f40e6601688638
MD5 hash:
fd3a19c809cca69796b57cd80abac2ec
SHA1 hash:
2de71c4c527cec5a3b4cb7d9685f519cf4e1ad8e
Detections:
AgentTesla
win_agent_tesla_g2
INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Agenttesla_type2
INDICATOR_SUSPICIOUS_Binary_References_Browsers
INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
INDICATOR_EXE_Packed_GEN01
INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
SH256 hash:
42b875ba2d7d655249fb6a50f8106b7070fcba963a9030f72558b1632e0c6a6c
MD5 hash:
d9d0d9017bda7878be11f91b928123fd
SHA1 hash:
c9107b01689d61e4a28d248673172f761ec30b10
Malware family:
AgentTesla
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
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 |
|---|---|
| Author: | ditekshen |
| Description: | AgentTeslaV3 infostealer payload |
| Rule name: | DebuggerCheck__RemoteAPI |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | INDICATOR_EXE_Packed_GEN01 |
|---|---|
| Author: | ditekSHen |
| Description: | Detect packed .NET executables. Mostly AgentTeslaV4. |
| Rule name: | INDICATOR_SUSPICIOUS_Binary_References_Browsers |
|---|---|
| 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 |
|---|---|
| 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 |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables referencing many email and collaboration clients. Observed in information stealers |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables referencing many file transfer clients. Observed in information stealers |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL |
|---|---|
| Author: | ditekSHen |
| Description: | Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables referencing Windows vault credential objects. Observed in infostealers |
| Rule name: | malware_Agenttesla_type2 |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect Agenttesla in memory |
| Reference: | internal research |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Windows_Trojan_AgentTesla_ebf431a8 |
|---|---|
| Author: | Elastic Security |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
Comments
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