MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1. 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: 16


Intelligence 16 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1
SHA3-384 hash: b5bc4eb01fab4f4f1237f5d71d0947ab4938e300cdd7db60be66578da15ce9f2faac3c4c310f30c3a88939da4ad158e4
SHA1 hash: ad1076eb0803593f9b032658b9e9b8d0b936e9f8
MD5 hash: 6fd4bb4cc0cd9f101b6cd7bb10e27893
humanhash: glucose-south-maine-mountain
File name:6fd4bb4cc0cd9f101b6cd7bb10e27893.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:2'202'624 bytes
First seen:2025-08-13 07:48:31 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 49152:BjF0mrfGRg3LwRrcRb1n21tYuyhiTDLzmKvIHzTq7:BSm/3YcPiXTDLfIHzTS
Threatray 70 similar samples on MalwareBazaar
TLSH T138A52319A6A54F00E6883E35F1A36D5987F0E5CB36FBD75E2E141150BF027F48C862EA
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter abuse_ch
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
50
Origin country :
SE SE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
6fd4bb4cc0cd9f101b6cd7bb10e27893.exe
Verdict:
Malicious activity
Analysis date:
2025-08-13 07:50:47 UTC
Tags:
auto-reg netreactor crypto-regex
Link:
https://app.any.run/tasks/51215e7b-2e06-48f2-87ae-4588af810ed1

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/21057/
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=689c43849901157561b5b6f2
Tags:
autorun virus spawn sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Launching a process
Creating a process from a recently created file
Creating a file
DNS request
Connection attempt
Unauthorized injection to a recently created process
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
barys base64 net_reactor obfuscated obfuscated packed packed
Link:
https://www.filescan.io/uploads/689c4383397fd3ce6fa73d96/reports/48b1f038-8caa-4070-b248-406458b21fde/overview
Verdict:
Malicious
Labled as:
Barys.Generic
Link:
https://www.hybrid-analysis.com/sample/4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/81e0a045-83fe-4b58-8498-9459deb18495
Result
Threat name:
PureLog Stealer, Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1755850
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected PureLog Stealer
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1
Verdict:
Malware
YARA:
12 match(es)
Tags:
.Net .Net Obfuscator .Net Reactor Executable PE (Portable Executable) SOS: 0.84 Win 32 Exe x86
Link:
https://app.malva.re/file/6fd4bb4cc0cd9f101b6cd7bb10e27893
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1/
Verdict:
Malicious
Threat:
Trojan.MSIL.Quasar
Link:
https://tip.neiki.dev/file/4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1
Threat name:
Win32.Trojan.Egairtigado
Create hunting rule
Status:
Malicious
First seen:
2025-08-06 18:54:13 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jwm3slpukkqrhox6fl4c2i3sex7zhl7dt6xbhayfxaqbwf4tk7aq._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1
QuasarRAT
507b813f47259eadd4260cb58e5a8244799d0ac3075d68147095b1bd9a2b7593
QuasarRAT
5d6b6bcd74ed29295040fe1622bd3c681fe2b729eaa9f24b4538d1db6eb2e3e3
QuasarRAT
6ce2462286dc687b1ccab7592a3a68c0504b2639e28cfb8a849e0cd12763fea0
QuasarRAT
9019276cf50b5e8397a04c81e75faf35308f2dd7b480db9a060e1c50e66678f2
QuasarRAT
b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394
QuasarRAT
error
QuasarRAT
+ 60 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
execution persistence
Link:
https://tria.ge/reports/250813-jntqhshn3x/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/b808af0a-4ffc-4cd2-83eb-31a82ed184b0
Unpacked files
SH256 hash:
4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1
MD5 hash:
6fd4bb4cc0cd9f101b6cd7bb10e27893
SHA1 hash:
ad1076eb0803593f9b032658b9e9b8d0b936e9f8
Link:
https://www.unpac.me/results/a9edaadd-f476-4ce8-87ef-1e327a6e6756/
SH256 hash:
01bf86e251c854edf9a5778cdfb5a3d075e5abbe95d17be072aec642b624bd01
MD5 hash:
9c9c991f72245b23e73bd758e3fa27aa
SHA1 hash:
09d0f3285350728d6ad4e44244a7a1de23b3cd93
Detections:
INDICATOR_EXE_Packed_Fody
Create hunting rule
Link:
https://www.unpac.me/results/a9edaadd-f476-4ce8-87ef-1e327a6e6756/
SH256 hash:
6185d78b8a0cade9e6a7eeb728d4194d8d60b30275827fef2f3842e9e4508676
MD5 hash:
f2e9a3062b992c95e02bdfcd77f1f8a6
SHA1 hash:
12cee4da129fe7056ddf1e58e026e2a2de754f45
Detections:
SUSP_NET_Large_Static_Array_In_Small_File_Jan24
Create hunting rule
HKTL_NET_GUID_Quasar
Create hunting rule
Link:
https://www.unpac.me/results/a9edaadd-f476-4ce8-87ef-1e327a6e6756/
Parent samples :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 hash:
6105190f18aad35529ab7bbd931e230e731ae8dcd636e5b2c3e3abb9cfba62e1
MD5 hash:
86baf40adb75b61d37c15fe90d9239f9
SHA1 hash:
35ae382bf51f217bd59d6e5529bd9a0b7d13e922
Link:
https://www.unpac.me/results/a9edaadd-f476-4ce8-87ef-1e327a6e6756/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4d99b92df452a113bafe2af82d237225ff93afe39fae138305b8201b179357c1

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:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Cape
Cape
https://www.capesandbox.com/analysis/21057/

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments