MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e. 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


RemcosRAT


Vendor detections: 15


Intelligence 15 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e
SHA3-384 hash: 0443c235a87ce070b07886cc50bba68761e4b6d28215d3406641eac369c77a16bc1a8adc39eb5edd9b5abb31e98f816f
SHA1 hash: 243b70253953a398c787905a503c3c9bd27b73c8
MD5 hash: c220056c58b75cabcdd02a60e77fe6ae
humanhash: johnny-november-emma-wyoming
File name:Invoice # 78600667766.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:890'368 bytes
First seen:2023-05-22 13:21:51 UTC
Last seen:2023-06-05 09:31:44 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 2a47bc7f7b8c911802f26218bdd23fe7 (1 x RemcosRAT)
ssdeep 12288:PiG0CtrZ3HZX+pjqSDTdGluNIAOIQM6PLbHViwW5TpHJxLCRQZUts8NHDU:PiFCr7upjqSg4OIl6dw5Wm85
Threatray 2'209 similar samples on MalwareBazaar
TLSH T173158D52B2D29937C1633A344D5B5750B8397F601928748A6FE83FBC9F7A25138293F2
TrID 86.8% (.EXE) Win32 Executable Borland Delphi 6 (262638/61)
4.6% (.EXE) Win32 Executable Delphi generic (14182/79/4)
4.3% (.SCR) Windows screen saver (13097/50/3)
1.4% (.EXE) Win32 Executable (generic) (4505/5/1)
0.6% (.EXE) Win16/32 Executable Delphi generic (2072/23)
File icon (PE):PE icon
dhash icon e4e08484a486a0a4 (2 x Formbook, 1 x ModiLoader, 1 x RemcosRAT)
Reporter James_inthe_box
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
47
# of downloads :
277
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
27c02873181ec0eacf73c171da84e61e
Verdict:
Malicious activity
Analysis date:
2023-05-22 10:48:02 UTC
Tags:
dbatloader
Link:
https://app.any.run/tasks/e4a4df00-cf3e-48b1-8fad-ead894e24ae0

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Rogue.0hr.20230519-1835.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
DNS request
Sending an HTTP GET request
Sending a custom TCP request
Creating a file
Running batch commands
Creating a process with a hidden window
Launching cmd.exe command interpreter
Launching a process
Creating a process from a recently created file
Searching for the window
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/87437/overview
Behaviour
MalwareBazaar
CheckCmdLine
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
greyware keylogger lolbin modiloader packed shell32.dll zusy
Link:
https://www.filescan.io/uploads/646b6c7ab95956296d77645e/reports/62f1b798-2649-4bf3-b49c-dce567159407/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Dbatloader
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/6866ba00-f2a7-4157-896d-95cb3173e839
Result
Threat name:
Remcos, DBatLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1239650
Signature
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates a thread in another existing process (thread injection)
DLL side loading technique detected
Drops executables to the windows directory (C:\Windows) and starts them
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Snort IDS alert for network traffic
Suspicious powershell command line found
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 Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 872654 Sample: Invoice_#_78600667766.exe Startdate: 22/05/2023 Architecture: WINDOWS Score: 100 73 Snort IDS alert for network traffic 2->73 75 Multi AV Scanner detection for domain / URL 2->75 77 Found malware configuration 2->77 79 11 other signatures 2->79 10 Invoice_#_78600667766.exe 1 9 2->10         started        15 Gxryidvb.exe 2->15         started        17 Gxryidvb.exe 2->17         started        process3 dnsIp4 65 web.fe.1drv.com 10->65 67 qszwig.dm.files.1drv.com 10->67 69 2 other IPs or domains 10->69 53 C:\Users\Public\Libraries\netutils.dll, PE32+ 10->53 dropped 55 C:\Users\Public\Libraries\easinvoker.exe, PE32+ 10->55 dropped 57 C:\Users\Public\Librariesbehaviorgraphxryidvb.exe, PE32 10->57 dropped 59 2 other malicious files 10->59 dropped 93 Writes to foreign memory regions 10->93 95 Allocates memory in foreign processes 10->95 97 Creates a thread in another existing process (thread injection) 10->97 19 cmd.exe 3 10->19         started        22 colorcpl.exe 10->22         started        99 Antivirus detection for dropped file 15->99 101 Multi AV Scanner detection for dropped file 15->101 103 Injects a PE file into a foreign processes 15->103 25 logagent.exe 15->25         started        27 SndVol.exe 17->27         started        file5 signatures6 process7 dnsIp8 81 Uses ping.exe to sleep 19->81 83 Drops executables to the windows directory (C:\Windows) and starts them 19->83 85 Uses ping.exe to check the status of other devices and networks 19->85 29 easinvoker.exe 19->29         started        31 PING.EXE 1 19->31         started        34 xcopy.exe 2 19->34         started        37 6 other processes 19->37 61 www.christopherferr.com 149.202.8.123, 2404, 49722 OVHFR France 22->61 63 geoplugin.net 178.237.33.50, 49723, 80 ATOM86-ASATOM86NL Netherlands 22->63 signatures9 process10 dnsIp11 39 cmd.exe 1 29->39         started        71 127.0.0.1 unknown unknown 31->71 49 C:\Windows \System32\easinvoker.exe, PE32+ 34->49 dropped 51 C:\Windows \System32\netutils.dll, PE32+ 37->51 dropped file12 process13 signatures14 87 Suspicious powershell command line found 39->87 89 Adds a directory exclusion to Windows Defender 39->89 42 powershell.exe 23 39->42         started        45 conhost.exe 39->45         started        process15 signatures16 91 DLL side loading technique detected 42->91 47 conhost.exe 42->47         started        process17
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2023-05-19 13:14:26 UTC
File Type:
PE (Exe)
Extracted files:
54
AV detection:
18 of 23 (78.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6ortohn336e7zjzoyvpocnbrnew5wcna6zxbp3r7fsxngi2svnha._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
23dc5d937451c57dc7137a2c84ff7763822b5bf627fbd8ab6b5305e4f0a0bb13
RemcosRAT
28e3150ea7c783636a71ebf55144b06e47fa4e4d0866ac9a5419d8d019b7128a
RemcosRAT
42ba74ceecf062e25955c7f807f584c4137310f39f3864e78942e16cfb87a864
RemcosRAT
a2cbf70ab3ebedd2c768816596fade8e94d1dd0d6025001ac59a71860e45b808
RemcosRAT
c266fa606a35b4ede65ae441e448dfcbf63b7a4e52091be0a6dc013b3e93c1f8
RemcosRAT
c4cd277e81aec420cdf23a0d5ebff50b0d64dd9c6b3b1942567c263032f64deb
RemcosRAT
d42f6ad0179bb066b735f67d8141a091fd468cb7c71118645cebe381622ac8fa
RemcosRAT
+ 2'199 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:modiloader family:remcos botnet:sky-yak persistence rat trojan
Link:
https://tria.ge/reports/230522-ql79fsbd6w/
Behaviour
Enumerates system info in registry
Runs ping.exe
Script User-Agent
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Adds Run key to start application
Executes dropped EXE
Loads dropped DLL
ModiLoader Second Stage
ModiLoader, DBatLoader
Remcos
Malware Config
C2 Extraction:
www.christopherferr.com:2404
Unpacked files
SH256 hash:
f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e
MD5 hash:
c220056c58b75cabcdd02a60e77fe6ae
SHA1 hash:
243b70253953a398c787905a503c3c9bd27b73c8
Detections:
DbatLoaderStage1
Create hunting rule
win_dbatloader_g1
Create hunting rule
Link:
https://www.unpac.me/results/c3859d69-e823-4556-a90c-9bff00f69616/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/f3a3371dbbdf/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e

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:CMD_Ping_Localhost
Create hunting rule
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:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
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

File information

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

Malspam

RemcosRAT

7z 191f37184e518b89ae6f0a1a5891cbb85beabd38e5888064f0e1fde295e48b7e

RemcosRAT

Executable exe f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 191f37184e518b89ae6f0a1a5891cbb85beabd38e5888064f0e1fde295e48b7e
  
Dropped by
MD5 f9bdaf7b9b8113e6aaf6e3ca2dce9834

Comments