MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a. 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: 15


Intelligence 15 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a
SHA3-384 hash: f8c39758a86e598a4ce5f544bd374c97c61850356fe693a3004192c69922d9a6e480de1ada2f028a7227895234904be3
SHA1 hash: c92d54c5f4a95d1ecc04238c6f104180f6b3f713
MD5 hash: 071f1728e901a86dafc74a1516477940
humanhash: zulu-muppet-crazy-table
File name:Grim.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'852'928 bytes
First seen:2025-08-14 15:38:01 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 49152:kXUXrw5VbCZHuA/OwqsFFm74iLEXfCplexShn:X0PbmZ/OwHbm7pdl6Sh
TLSH T18785337AD5E1A115DFE0CDBFFEB26ED31E160ED26629D010A06C11EEF060237259D1B8
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter burger
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
47
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Grim.exe
Verdict:
Malicious activity
Analysis date:
2025-08-14 15:37:55 UTC
Tags:
uac
Link:
https://app.any.run/tasks/36fc497a-2624-4091-80b5-6463172b67a0

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/21429/
Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=689e030248c64d68735c6699
Tags:
spawn virus remo
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the system32 subdirectories
Launching a process
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
base64 packed
Link:
https://www.filescan.io/uploads/689e030f397fd3ce6fa976fd/reports/6a78eda9-c5b1-4fb9-902e-3a6bd2e2a7d2/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/03bf6f89-b43f-4c02-8c42-a6aa1f07ca28
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1757212
Signature
.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)
Hides threads from debuggers
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
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a/
Verdict:
Malicious
Threat:
Trojan.MSIL.Quasar
Link:
https://tip.neiki.dev/file/4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a
Threat name:
ByteCode-MSIL.Trojan.Zilla
Create hunting rule
Status:
Malicious
First seen:
2025-08-14 15:37:56 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jmerft7vr5afumzv6djgqxz6xcqd5upylsezvvpwenngns37v4va._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
error
QuasarRAT
Result
Malware family:
n/a
Score:
  5/10
Tags:
execution persistence
Link:
https://tria.ge/reports/250814-s3b9fswpv9/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Drops file in System32 directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/cce5448b-816f-451c-8f71-74bbe099f58f
Unpacked files
SH256 hash:
4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a
MD5 hash:
071f1728e901a86dafc74a1516477940
SHA1 hash:
c92d54c5f4a95d1ecc04238c6f104180f6b3f713
Link:
https://www.unpac.me/results/15a86d5c-afac-45a3-8c3b-09bb76c200ba/
SH256 hash:
cdf2ab4428f36b6a898f83f1d779a965d0a988101b00083fd936f9c4593afb3c
MD5 hash:
f4a5327a6b5f27d8faa80a87d4f5c7ab
SHA1 hash:
1b9bdb34d6a584440c745b4bd9015884aa6fb138
Link:
https://www.unpac.me/results/15a86d5c-afac-45a3-8c3b-09bb76c200ba/
SH256 hash:
e54b3f90f18efaba3b4e714533d5e1f0aaf2f656b9166d6498e15b659cc41b8c
MD5 hash:
4a3c2b2b73407e79a9ebc6caece6c144
SHA1 hash:
70f64ab70fdc0c484da6f914d2742115c7a97141
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/15a86d5c-afac-45a3-8c3b-09bb76c200ba/
Parent samples :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 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/4b0912cff58f405a3335f0d2685f3eb8a03ed1f85c899ad5f6235a66cb7faf2a

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: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/21429/

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