MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 a91cae41f2c66c03b2933ec98311d5e433fa98dc7e75e95161aa0123956b9c3e. 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
MassLogger
Vendor detections: 12
| SHA256 hash: | a91cae41f2c66c03b2933ec98311d5e433fa98dc7e75e95161aa0123956b9c3e |
|---|---|
| SHA3-384 hash: | d97e40f1d7fd59a80736cd65a7edc53cc564ace977021ce676ca07cb5f98747aed1971800e46a51404321cba42dc6727 |
| SHA1 hash: | 2726c39186d62b98e670c685883e4fff6b6f771b |
| MD5 hash: | 6640b45b0bc519c815dc42eb2cdcf587 |
| humanhash: | alabama-lake-emma-quebec |
| File name: | Kopi af overfa¸rsel 03.01.2021.exe |
| Download: | download sample |
| Signature | MassLogger |
| File size: | 971'264 bytes |
| First seen: | 2021-03-02 07:54:14 UTC |
| Last seen: | 2021-03-02 09:48:02 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 24576:KPkxpeOzt0ynb6RIjRFRAMnyek9hz2Ic2:OkDeOz7b6mhyZ |
| Threatray | 622 similar samples on MalwareBazaar |
| TLSH | D825BF3435AF207ED833BAB21BC4985CD3956221770BBB6FA4805ACB86D1E52DFC1D25 |
| Reporter |  abuse_ch |
| Tags: | DHL DNK exe geo MassLogger |
abuse_ch
Malspam distributing MassLogger:HELO: websrv01.zoolab.it
Sending IP: 89.46.192.135
From: Aya Bjorn <ayabjorn05@hotmail.com>
Reply-To: Aya Bjorn <swatil-bom5.vsnl@outlook.com>
Subject: Råd om overførsel 03.01.2021
Attachment: Kopi af overfa¸rsel 03.01.2021.7z (contains "Kopi af overfa¸rsel 03.01.2021.exe")
MassLogger SMTP Exfil server:
mail.acisn.pt:587
Intelligence
File Origin
# of uploads :
2
# of downloads :
170
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Kopi af overfa¸rsel 03.01.2021.exe
Verdict:
Malicious activity
Analysis date:
2021-03-02 08:36:03 UTC
Tags:
trojan stealer masslogger evasion
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
MassLogger
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a UDP request
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Creating a file
DNS request
Sending an HTTP GET request
Using the Windows Management Instrumentation requests
Reading critical registry keys
Creating a process from a recently created file
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun by 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.
Result
Threat name:
MassLogger RAT
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains very large strings
.NET source code references suspicious native API functions
Adds a directory exclusion to Windows Defender
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
May check the online IP address of the machine
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Scheduled temp file as task from temp location
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 access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Costura Assembly Loader
Yara detected MassLogger RAT
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-03-02 07:55:16 UTC
AV detection:
12 of 48 (25.00%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
masslogger
Similar samples:
+ 612 additional samples on MalwareBazaar
Result
Malware family:
masslogger
Score:
10/10
Tags:
family:masslogger spyware stealer
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
Reads user/profile data of web browsers
MassLogger
MassLogger Main Payload
Unpacked files
SH256 hash:
0232889bba64d50fd27770d69a69d91541635ef74d7405de324a66547efeda35
MD5 hash:
0929fafab78aac883f1a7e2cecd256ca
SHA1 hash:
d4400d963954b4f519bd00ea7c55bf3f60752c9d
Detections:
win_masslogger_w0
SH256 hash:
610a4e9a11c1d2db8f0c8f48bbcd98d2234955294c977cd0ae89f1c2aa8cd06d
MD5 hash:
2c2c5b77be79f0490854a60be813f9ff
SHA1 hash:
b61cc5042af08c3cae48fd8263f2f021f5c398b0
SH256 hash:
f8b5b51efedb3e87493ac2439473564603cc3059d57956f209a7310e311a1027
MD5 hash:
d66f89bf838fb52ed59d311a99aea214
SHA1 hash:
342525c4aabbb92abf51459081d34ed0f1cdc965
SH256 hash:
a91cae41f2c66c03b2933ec98311d5e433fa98dc7e75e95161aa0123956b9c3e
MD5 hash:
6640b45b0bc519c815dc42eb2cdcf587
SHA1 hash:
2726c39186d62b98e670c685883e4fff6b6f771b
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
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: | INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu |
|---|---|
| Author: | ditekSHen |
| Description: | Detect executables with stomped PE compilation timestamp that is greater than local current time |
| Rule name: | INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture |
|---|---|
| Author: | ditekSHen |
| Description: | Detect executables with stomped PE compilation timestamp that is greater than local current time |
| Rule name: | Keylog_bin_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | Contains Keylog |
| Rule name: | MassLogger |
|---|---|
| Author: | kevoreilly |
| Description: | MassLogger |
| Rule name: | masslogger_gcch |
|---|---|
| Author: | govcert_ch |
| Rule name: | win_masslogger_w0 |
|---|---|
| Author: | govcert_ch |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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