MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b. 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: 14


Intelligence 14 IOCs YARA 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b
SHA3-384 hash: d03274c0b6483738974b3e5712decfd545e3b705b347d670e2c29d0473cacb2a20e88295e6a2bd18cec6ce64bba2c395
SHA1 hash: 2fa18d5ad53a15fc17ed4446a2c3b109fdfa4868
MD5 hash: a305c652349ff178f14116a3732213d1
humanhash: mike-floor-magnesium-item
File name:a305c652349ff178f14116a3732213d1.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'941'504 bytes
First seen:2025-05-15 06:12:00 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:cVi3eSWeWBRYRR1qJvHIPbcNE0KKSb7yviUSQaBaOwIRxl2S62/9pTWYd/srTNb:fw7YReEwKKSb7L3wip6wTRk
Threatray 8 similar samples on MalwareBazaar
TLSH T15E95BF203DEA8019F1B7AF75DBD0758A8B7EF223770A964E145503460E67B41EDCB23A
TrID 58.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
13.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
8.4% (.EXE) Win64 Executable (generic) (10522/11/4)
5.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
Reporter abuse_ch
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
449
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a305c652349ff178f14116a3732213d1.exe
Verdict:
Malicious activity
Analysis date:
2025-05-15 06:39:10 UTC
Tags:
pastebin auto-reg evasion crypto-regex
Link:
https://app.any.run/tasks/0c3bbf26-e0f3-49ad-bdda-1bd1ed2d24fb

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Malware.Generic-9883083-0
Create hunting rule

Win.Malware.Bulz-9933026-0
Create hunting rule

Win.Malware.Generic-6623004-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=682586c3e16384d6a7048d1b
Tags:
autorun quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% directory
Launching a process
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 formbook hacktool krypt obfuscated packed packed packer_detected reconnaissance
Link:
https://www.filescan.io/uploads/682585c60de036ed65a86938/reports/2b020724-2b26-457c-b9ef-f402f882efdd/overview
Verdict:
Malicious
Labled as:
MSIL.Krypt.Generic
Link:
https://www.hybrid-analysis.com/sample/603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0ecfd4bc-55a4-4aec-9cdd-d369fc41113c
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/1690516
Signature
.NET source code contains potential unpacker
Connects to a pastebin service (likely for C&C)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
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
Sigma detected: Potentially Suspicious Malware Callback Communication
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1690516 Sample: yGDDsAkEGp.exe Startdate: 15/05/2025 Architecture: WINDOWS Score: 96 31 pastebin.com 2->31 33 ipwho.is 2->33 35 bg.microsoft.map.fastly.net 2->35 49 Multi AV Scanner detection for submitted file 2->49 51 Yara detected Quasar RAT 2->51 53 .NET source code contains potential unpacker 2->53 57 3 other signatures 2->57 9 yGDDsAkEGp.exe 4 2->9         started        13 Updater.exe 3 2->13         started        signatures3 55 Connects to a pastebin service (likely for C&C) 31->55 process4 file5 27 C:\Users\user\AppData\Roaming\Updater.exe, PE32 9->27 dropped 29 C:\Users\user\AppData\...\yGDDsAkEGp.exe.log, CSV 9->29 dropped 59 Uses schtasks.exe or at.exe to add and modify task schedules 9->59 61 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->61 15 Updater.exe 14 2 9->15         started        19 schtasks.exe 1 9->19         started        signatures6 process7 dnsIp8 37 156.208.9.253, 4444, 49719, 49725 TE-ASTE-ASEG Egypt 15->37 39 pastebin.com 172.67.25.94, 443, 49718 CLOUDFLARENETUS United States 15->39 41 ipwho.is 108.181.47.111, 443, 49722 ASN852CA Canada 15->41 43 Multi AV Scanner detection for dropped file 15->43 45 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->45 47 Installs a global keyboard hook 15->47 21 schtasks.exe 1 15->21         started        23 conhost.exe 19->23         started        signatures9 process10 process11 25 conhost.exe 21->25         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-05-12 14:42:49 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
30 of 37 (81.08%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ma67etfbsgv7f46xwvz3rfzguji6ufy4xcmljjglpmp7zbwcernq._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
368989934389f9101ee031231304d2544a5bd55ae3626bdba993451715558d7e
QuasarRAT
50cb6b8d0f572cd355d682a3f3529854b98cc75e141e452c98bec0279ef1ace2
QuasarRAT
603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b
QuasarRAT
818ef3d013069a7bacd3bf4d4a728ace9ea74ab518fb4adffcc0a23f57e4b585
QuasarRAT
e3028ecd7637653dda1250fa2925e143796e385cda98191f04eec0681fd0c826
QuasarRAT
error
QuasarRAT
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/250515-gyb74ssxfw/
Behaviour
Modifies system certificate store
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Legitimate hosting services abused for malware hosting/C2
Executes dropped EXE
Verdict:
Malicious
Tags:
Win.Malware.Generic-9883083-0
YARA:
n/a
Link:
https://app.threat.zone/submission/314ad5ea-9e84-45dd-b962-09a039b6b745
Unpacked files
SH256 hash:
603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b
MD5 hash:
a305c652349ff178f14116a3732213d1
SHA1 hash:
2fa18d5ad53a15fc17ed4446a2c3b109fdfa4868
Link:
https://www.unpac.me/results/9b1381a6-72de-45e5-bd54-6af5f1b4e1d9/
SH256 hash:
2e69eaa7674ede275b8481870cdd7808dfe3f3d8448d84e42a9936470f3bcf4a
MD5 hash:
88d141ef4b3e8be826d396c54840b621
SHA1 hash:
bf3b301839c6fb3d677d1d49f3cddc5c1e9d29ce
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/9b1381a6-72de-45e5-bd54-6af5f1b4e1d9/
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/603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b

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:Costura_Protobuf
Create hunting rule
Author:@bartblaze
Description:Identifies Costura and Protobuf in .NET assemblies, respectively for storing resources and (de)serialization. Seen together might indicate a suspect binary.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
Rule name:INDICATOR_EXE_Packed_Fody
Create hunting rule
Author:ditekSHen
Description:Detects executables manipulated with Fody
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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.

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 (GUARD_CF)high

Comments