MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48. 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


MassLogger


Vendor detections: 15


Intelligence 15 IOCs YARA 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48
SHA3-384 hash: 35adf8512eea7e5bfd3e8bc80ac811a7621f66d3b70ca3c7721238a78b9769e1f4829ab3c196d500dec17e87bba097d4
SHA1 hash: fb097c0310f68a1876b484c17e8837c804ee515d
MD5 hash: beda5984a652d9931902980a4d7c258b
humanhash: illinois-emma-three-pennsylvania
File name:csrss.exe
Download: download sample
Signature MassLogger
Create hunting rule
File size:1'705'472 bytes
First seen:2025-04-14 20:57:48 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 5260d10005ff55667f5ba84b94641d84 (1 x MassLogger, 1 x DBatLoader)
ssdeep 24576:P7c2dFfsDO896pbDZtUe0KId0nGw5u2QzN/dGer9kXx3pj8WO35S:P0i9H/0r0Gw5xeN/dGgwTY
TLSH T18485E17771727CA2C0BFC5B80A8E85DC0C356E3B19AC44467DF33A0E9AA79C1E46525B
TrID 35.3% (.EXE) InstallShield setup (43053/19/16)
34.0% (.EXE) Win32 EXE PECompact compressed (generic) (41569/9/9)
11.6% (.EXE) Win32 Executable Delphi generic (14182/79/4)
8.6% (.EXE) Win64 Executable (generic) (10522/11/4)
3.6% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon c46b2b072313f4ec (5 x RemcosRAT, 1 x MassLogger, 1 x DBatLoader)
Reporter skocherhan
Tags:192-3-26-143 exe MassLogger opendir


Avatar
skocherhan
http://192.3.26.143/460/csrss.exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
496
Origin country :
GB GB
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
csrss.exe
Verdict:
Malicious activity
Analysis date:
2025-04-14 20:59:58 UTC
Tags:
delphi dbatloader loader snake keylogger evasion stealer ims-api generic netreactor
Link:
https://app.any.run/tasks/b162661a-7200-4965-bb90-798642ca35a4

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/2218/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67fd78141dba888a93d3d8ce
Tags:
delphi emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
Creating a file
Running batch commands
Creating a process with a hidden window
Launching a process
Creating a process from a recently created file
DNS request
Connection attempt
Sending an HTTP GET request
Sending a custom TCP request
Reading critical registry keys
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context borland_delphi fingerprint keylogger modiloader zusy
Link:
https://www.filescan.io/uploads/67fd76e0e9c1e2579799043b/reports/3bac5e83-4ff9-41b4-990c-cb565b54689e/overview
Verdict:
Malicious
Labled as:
Zusy.Generic
Link:
https://www.hybrid-analysis.com/sample/f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/7172e7c9-bdd0-451f-b526-de50f8f3cddf
Result
Threat name:
DBatLoader, MSIL Logger, MassLogger RAT,
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1664900
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Allocates many large memory junks
Allocates memory in foreign processes
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to log keystrokes (.Net Source)
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Drops PE files with a suspicious file extension
Found malware configuration
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sample uses process hollowing technique
Sigma detected: DLL Search Order Hijackig Via Additional Space in Path
Sigma detected: Suspicious Process Parents
Sigma detected: System File Execution Location Anomaly
Sigma detected: Windows Binaries Write Suspicious Extensions
Tries to detect the country of the analysis system (by using the IP)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Writes to foreign memory regions
Yara detected DBatLoader
Yara detected MassLogger RAT
Yara detected MSIL Logger
Yara detected PureLog Stealer
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1664900 Sample: csrss.exe Startdate: 14/04/2025 Architecture: WINDOWS Score: 100 29 reallyfreegeoip.org 2->29 31 checkip.dyndns.org 2->31 33 checkip.dyndns.com 2->33 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Multi AV Scanner detection for submitted file 2->45 49 14 other signatures 2->49 8 csrss.exe 6 2->8         started        signatures3 47 Tries to detect the country of the analysis system (by using the IP) 29->47 process4 file5 27 C:\Users\user\Links\tmotzbvK.pif, PE32 8->27 dropped 51 Drops PE files with a suspicious file extension 8->51 53 Writes to foreign memory regions 8->53 55 Allocates memory in foreign processes 8->55 57 3 other signatures 8->57 12 tmotzbvK.pif 15 2 8->12         started        16 cmd.exe 1 8->16         started        18 cmd.exe 1 8->18         started        signatures6 process7 dnsIp8 37 checkip.dyndns.com 132.226.247.73, 49711, 80 UTMEMUS United States 12->37 39 reallyfreegeoip.org 104.21.80.1, 443, 49712 CLOUDFLARENETUS United States 12->39 59 Detected unpacking (changes PE section rights) 12->59 61 Detected unpacking (overwrites its own PE header) 12->61 63 Tries to steal Mail credentials (via file / registry access) 12->63 65 Tries to harvest and steal browser information (history, passwords, etc) 12->65 67 Uses ping.exe to sleep 16->67 69 Uses ping.exe to check the status of other devices and networks 16->69 20 conhost.exe 16->20         started        22 PING.EXE 1 18->22         started        25 conhost.exe 18->25         started        signatures9 process10 dnsIp11 35 127.0.0.1 unknown unknown 22->35
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48/
Threat name:
Win32.Trojan.ModiLoader
Create hunting rule
Status:
Malicious
First seen:
2025-04-10 01:25:45 UTC
File Type:
PE (Exe)
Extracted files:
48
AV detection:
31 of 38 (81.58%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7em22oqlsyhimzicjmcn4dk6tonyxt6vaj3mw2wqhlb2l74pdjea._file
Verdict:
malicious
Label(s):
dbatloader
Create hunting rule
Similar samples:
error
MassLogger
Result
Malware family:
modiloader
Create hunting rule
Score:
  10/10
Tags:
family:modiloader discovery trojan
Link:
https://tria.ge/reports/250414-zr7pjs1ls7/
Behaviour
Runs ping.exe
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Suspicious use of SetThreadContext
Executes dropped EXE
ModiLoader Second Stage
ModiLoader, DBatLoader
Modiloader family
Verdict:
Malicious
Tags:
Win.Trojan.Modiloader-10042434-0 404keylogger
YARA:
n/a
Link:
https://app.threat.zone/submission/f2b1d327-72cc-461e-8dd3-c05e21b94220
Unpacked files
SH256 hash:
f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48
MD5 hash:
beda5984a652d9931902980a4d7c258b
SHA1 hash:
fb097c0310f68a1876b484c17e8837c804ee515d
Link:
https://www.unpac.me/results/84bdbab1-2694-4bde-8e77-8cc8ef1563e4/
Malware family:
MassLogger
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/f919ad3a0b96/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.68
Link:
https://yomi.yoroi.company/submissions/f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48

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:BobSoftMiniDelphiBoBBobSoft
Create hunting rule
Author:malware-lu
Rule name:Borland
Create hunting rule
Author:malware-lu
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
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)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Typical_Malware_String_Transforms
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Typical_Malware_String_Transforms_RID3473
Create hunting rule
Author:Florian Roth
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Windows_Generic_Threat_d7b57912
Create hunting rule
Author:Elastic Security

File information

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

MassLogger

Excel file xls f224f150405471b450aee9340cbb861df3563eefd60db1028d88fbc5ddc3a76f

MassLogger

Executable exe f919ad3a0b960e8665024b04de0d5e9b9b8bcfd50276cb6ad03ac3a5ff8f1a48

(this sample)

  
Dropped by
SHA256 f224f150405471b450aee9340cbb861df3563eefd60db1028d88fbc5ddc3a76f
Cape
Cape
https://www.capesandbox.com/analysis/2218/
  
URLhaus
https://urlhaus.abuse.ch/url/3511935/
  
Delivery method
Distributed via web download
  
Dropped by
MD5 377484b3fb484068d3becc59a9a25b02

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_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
WIN32_PROCESS_APICan Create Process and Threadskernel32.dll::CloseHandle
kernel32.dll::CreateThread
WIN_BASE_APIUses Win Base APIkernel32.dll::LoadLibraryExA
kernel32.dll::LoadLibraryA
kernel32.dll::GetStartupInfoA
kernel32.dll::GetDiskFreeSpaceA
kernel32.dll::GetCommandLineA
WIN_BASE_IO_APICan Create Fileskernel32.dll::CreateFileA
kernel32.dll::FindFirstFileA
version.dll::GetFileVersionInfoSizeA
version.dll::GetFileVersionInfoA
WIN_REG_APICan Manipulate Windows Registryadvapi32.dll::RegOpenKeyExA
advapi32.dll::RegQueryValueExA
WIN_USER_APIPerforms GUI Actionsuser32.dll::ActivateKeyboardLayout
user32.dll::CreateMenu
user32.dll::FindWindowA
user32.dll::PeekMessageA
user32.dll::PeekMessageW
user32.dll::CreateWindowExA

Comments