MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6. 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
QuasarRAT
Vendor detections: 17
| SHA256 hash: | a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6 |
|---|---|
| SHA3-384 hash: | 15a6ae40eaa14d633e21a3f9251adfe26c7a0bf24bea2dc98ec3438bc4f8b853e44120c7fbc75b28cdc96a0d2451ad57 |
| SHA1 hash: | b7df84535c4d8002cdd7675866617cf9884455c6 |
| MD5 hash: | 3a52e34c074990eee6ed67e3237c4c9c |
| humanhash: | pluto-william-undress-early |
| File name: | 3a52e34c074990eee6ed67e3237c4c9c |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 3'266'048 bytes |
| First seen: | 2024-06-23 18:58:47 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 49152:MvHI22SsaNYfdPBldt698dBcjHuZvgGoGnVvTHHB72eh2NT:Mvo22SsaNYfdPBldt6+dBcjHuZvF |
| Threatray | 690 similar samples on MalwareBazaar |
| TLSH | T15BE55B1437F85E32E16BD2B3E5B0501663F0F87AF363EB0B619167BA1C93B5448426A7 |
| TrID | 37.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 29.5% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 8.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 6.7% (.SCR) Windows screen saver (13097/50/3) 5.3% (.EXE) Win64 Executable (generic) (10523/12/4) |
| Reporter |  zbetcheckin |
| Tags: | 32 exe QuasarRAT |
Intelligence
File Origin
# of uploads :
1
# of downloads :
397
Origin country :
FRVendor Threat Intelligence
Malware family:
asyncrat
ID:
1
File name:
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe
Verdict:
Malicious activity
Analysis date:
2024-06-23 19:01:57 UTC
Tags:
rat asyncrat remote quasar evasion
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Link:
Tags:
Encryption Execution Generic Network Stealth Heur Quasarstealer
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Creating a file
Connection attempt
Sending a custom TCP request
Setting a keyboard event handler
DNS request
Using the Windows Management Instrumentation requests
Unauthorized injection to a recently created process
Enabling autorun by creating a file
Verdict:
Malicious
Labled as:
Malware
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:
Quasar RAT
Verdict:
Malicious
Result
Threat name:
Quasar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Generic Downloader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Score:
99%
Verdict:
Malware
File Type:
PE
Detection:
quasar
Threat name:
ByteCode-MSIL.Trojan.Quasar
Status:
Malicious
First seen:
2024-06-23 18:59:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
22 of 24 (91.67%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Similar samples:
+ 680 additional samples on MalwareBazaar
Result
Malware family:
quasar
Score:
10/10
Tags:
family:quasar botnet:office04 spyware trojan
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
94.228.166.40:4782
Unpacked files
SH256 hash:
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6
MD5 hash:
3a52e34c074990eee6ed67e3237c4c9c
SHA1 hash:
b7df84535c4d8002cdd7675866617cf9884455c6
Detections:
QuasarRAT
malware_windows_xrat_quasarrat
win_quasarrat_j2
MALWARE_Win_QuasarStealer
cn_utf8_windows_terminal
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
MAL_QuasarRAT_May19_1
INDICATOR_SUSPICIOUS_Binary_References_Browsers
INDICATOR_SUSPICIOUS_GENInfoStealer
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: | BLOWFISH_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for Blowfish constants |
| 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_NoneWindowsUA |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Windows executables referencing non-Windows User-Agents |
| Rule name: | INDICATOR_SUSPICIOUS_GENInfoStealer |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables containing common artifacts observed in infostealers |
| Rule name: | MALWARE_Win_QuasarStealer |
|---|---|
| Author: | ditekshen |
| Description: | Detects Quasar infostealer |
| Rule name: | MAL_QuasarRAT_May19_1 |
|---|---|
| Description: | Detects QuasarRAT malware |
| Rule name: | MAL_QuasarRAT_May19_1 |
|---|---|
| Author: | Florian Roth (Nextron Systems) |
| Description: | Detects QuasarRAT malware |
| Reference: | https://blog.ensilo.com/uncovering-new-activity-by-apt10 |
| Rule name: | MAL_QuasarRAT_May19_1_RID2E1E |
|---|---|
| Author: | Florian Roth |
| Description: | Detects QuasarRAT malware |
| Reference: | https://blog.ensilo.com/uncovering-new-activity-by-apt10 |
| Rule name: | MD5_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for MD5 constants |
| Rule name: | Multifamily_RAT_Detection |
|---|---|
| Author: | Lucas Acha (http://www.lukeacha.com) |
| Description: | Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | quasarrat |
|---|---|
| Author: | jeFF0Falltrades |
| Rule name: | RC6_Constants |
|---|---|
| Author: | chort (@chort0) |
| Description: | Look for RC6 magic constants in binary |
| Reference: | https://twitter.com/mikko/status/417620511397400576 |
| Rule name: | RIPEMD160_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for RIPEMD-160 constants |
| Rule name: | SHA1_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA1 constants |
| Rule name: | SHA512_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA384/SHA512 constants |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Windows_Generic_Threat_803feff4 |
|---|---|
| Author: | Elastic Security |
| Rule name: | win_quasar_rat_client |
|---|---|
| Author: | Matthew @ Embee_Research |
| Description: | Detects strings present in Quasar Rat Samples. |
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
BLint
The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.
Findings
| ID | Title | Severity |
|---|---|---|
| CHECK_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (HIGH_ENTROPY_VA) | high |
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