MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 834eeb8674c2768a31b15ae5b4a214418f4dd993196b490f4313c6cd0aeef9d8. 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: 19
| SHA256 hash: | 834eeb8674c2768a31b15ae5b4a214418f4dd993196b490f4313c6cd0aeef9d8 |
|---|---|
| SHA3-384 hash: | 5e90679677a0b26c5bfa665faae205a84d2cacfe9a71f6d131ac5579b6bd54aa0cdd132455787ef801d303011f2fe8f0 |
| SHA1 hash: | 08d907c740f8b528324508ff9e9be85856fbf5aa |
| MD5 hash: | 9836fea2a0b1e10af44ca3991c6ec5ea |
| humanhash: | vegan-london-romeo-north |
| File name: | Client.exe |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 3'285'004 bytes |
| First seen: | 2025-11-23 00:00:13 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'672 x AgentTesla, 19'489 x Formbook, 12'212 x SnakeKeylogger) |
| ssdeep | 49152:Svlt62XlaSFNWPjljiFa2RoUYIuSNkT3xbDoGdtCOTHHB72eh2NT:SvX62XlaSFNWPjljiFXRoUYIuYkZ4 |
| Threatray | 1'521 similar samples on MalwareBazaar |
| TLSH | T1E1E54A043BF85E32E17BD6B3D5B0505263F1E82AF363EB1B618167BA1C53B505842BA7 |
| TrID | 46.3% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 19.7% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 10.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 6.6% (.EXE) Win64 Executable (generic) (10522/11/4) 4.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) |
| Magika | pebin |
| Reporter |  Hexastrike |
| Tags: | exe QuasarRAT |
Intelligence
File Origin
# of uploads :
1
# of downloads :
34
Origin country :
IEVendor Threat Intelligence
Malware family:
quasar
ID:
1
File name:
Client.exe
Verdict:
Malicious activity
Analysis date:
2025-11-23 07:05:39 UTC
Tags:
quasar
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
QuasarStealer
Verdict:
Malicious
Score:
99.9%
Tags:
infosteal quasar
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
DNS request
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
base64 infostealer obfuscated obfuscated quasarrat reconnaissance stealer
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-17T23:28:00Z UTC
Last seen:
2025-11-18T14:53:00Z UTC
Hits:
~10
Malware family:
Quasar RAT
Verdict:
Malicious
Score:
99%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
13 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE Memory-Mapped (Dump) SOS: 0.31
Detection:
quasar
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Status:
Malicious
First seen:
2025-11-18 03:30:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
21 of 24 (87.50%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
quasarrat
Similar samples:
+ 1'511 additional samples on MalwareBazaar
Result
Malware family:
quasar
Score:
10/10
Tags:
family:quasar botnet:test discovery
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Browser Information Discovery
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Malware Config
C2 Extraction:
127.0.0.1:4782
Verdict:
Malicious
Tags:
rat quasar_rat stealer Win.Malware.Generic-9883083-0
YARA:
MAL_QuasarRAT_May19_1 malware_windows_quasarrat win_quasar_rat_client MALWARE_Win_Quasarstealer
Unpacked files
SH256 hash:
834eeb8674c2768a31b15ae5b4a214418f4dd993196b490f4313c6cd0aeef9d8
MD5 hash:
9836fea2a0b1e10af44ca3991c6ec5ea
SHA1 hash:
08d907c740f8b528324508ff9e9be85856fbf5aa
Detections:
QuasarRAT
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.84
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: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | Detect_PowerShell_Obfuscation |
|---|---|
| Author: | daniyyell |
| Description: | Detects obfuscated PowerShell commands commonly used in malicious scripts. |
| Rule name: | FreddyBearDropper |
|---|---|
| Author: | Dwarozh Hoshiar |
| Description: | Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip. |
| 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: | Lumma_Stealer_Detection |
|---|---|
| Author: | ashizZz |
| Description: | Detects a specific Lumma Stealer malware sample using unique strings and behaviors |
| Reference: | https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/ |
| 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: | quasarrat_kingrat |
|---|---|
| Author: | jeFF0Falltrades |
| Rule name: | RANSOMWARE |
|---|---|
| Author: | ToroGuitar |
| 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: | Sus_CMD_Powershell_Usage |
|---|---|
| Author: | XiAnzheng |
| Description: | May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP) |
| 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.
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