MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a. 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


Worm.Ramnit


Vendor detections: 10


Intelligence 10 IOCs YARA 8 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a
SHA3-384 hash: 62020e2566c9577c031d926beb66f46625fb80d6fcef7ff65760783034904ac09ef12b4d97d9d53fd184f6cdf88204b7
SHA1 hash: 4d41f80a6f2082acee991b6fdd830a3ae770ee6f
MD5 hash: 335b1296fa572b01158f7e8ef89c7064
humanhash: robin-kentucky-charlie-uncle
File name:335b1296fa572b01158f7e8ef89c7064
Download: download sample
Signature Worm.Ramnit
Create hunting rule
File size:490'496 bytes
First seen:2022-07-28 14:16:18 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 029a987f21e33b48f24d21b6f9ff1129 (78 x RemcosRAT, 1 x Worm.Ramnit)
ssdeep 6144:xOFBH/FMNjt18F+9a/NgAeDB4CcOtKp03b13a4LJ+sAOZZPWXbTcUkygz:xOFtiNBuFgawDB4NOmuwsfZP7yg
TLSH T11DA4BF11BAD2C072D97261340C29FB35DEB8BD202935957BB3E61D5BFD30180A72A6B7
TrID 38.7% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
24.6% (.EXE) Win64 Executable (generic) (10523/12/4)
11.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
10.5% (.EXE) Win32 Executable (generic) (4505/5/1)
4.7% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter zbetcheckin
Tags:32 exe Worm.Ramnit

Intelligence

File Origin
# of uploads :
1
# of downloads :
406
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/294945/
Detection(s):
PUA.Win.Packer.Asprotect-3
Create hunting rule

Win.Trojan.Remcos-9841897-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a process from a recently created file
Changing an executable file
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Creating a process with a hidden window
Running batch commands
Modifying an executable file
Setting a keyboard event handler
DNS request
Sending a custom TCP request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Query of malicious DNS domain
Infecting executable files
Sending an HTTP GET request to an infection source
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:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3c6348be-9f4d-4fbe-a595-6ae1d0195b7e
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
spre.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1042567
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
Detected unpacking (changes PE section rights)
Infects executable files (exe, dll, sys, html)
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
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
PE file contains section with special chars
PE file has a writeable .text section
Snort IDS alert for network traffic
Uses dynamic DNS services
Uses known network protocols on non-standard ports
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 675059 Sample: 2Pu35J2m4j Startdate: 28/07/2022 Architecture: WINDOWS Score: 100 63 Snort IDS alert for network traffic 2->63 65 Multi AV Scanner detection for domain / URL 2->65 67 Malicious sample detected (through community Yara rule) 2->67 69 12 other signatures 2->69 8 2Pu35J2m4j.exe 4 6 2->8         started        12 systemdll.exe 2->12         started        process3 file4 37 C:\Users\user\AppData\...\systemdll.exe, PE32 8->37 dropped 39 C:\Users\user\AppData\Local\Temp\MgQfxx.exe, PE32 8->39 dropped 41 C:\Users\...\systemdll.exe:Zone.Identifier, ASCII 8->41 dropped 43 C:\Users\user\AppData\Local\...\install.vbs, data 8->43 dropped 71 Contains functionality to steal Chrome passwords or cookies 8->71 73 Contains functionality to inject code into remote processes 8->73 75 Contains functionality to steal Firefox passwords or cookies 8->75 77 Delayed program exit found 8->77 14 MgQfxx.exe 18 8->14         started        19 wscript.exe 1 8->19         started        21 MgQfxx.exe 1 23 12->21         started        signatures5 process6 dnsIp7 51 ddos.dnsnb8.net 63.251.106.25, 49732, 49743, 49744 VOXEL-DOT-NETUS United States 14->51 45 C:\Program Files (x86)\AutoIt3\...\SciTE.exe, PE32 14->45 dropped 47 C:\Program Files (x86)\AutoIt3\...\MyProg.exe, MS-DOS 14->47 dropped 53 Antivirus detection for dropped file 14->53 55 Multi AV Scanner detection for dropped file 14->55 57 Detected unpacking (changes PE section rights) 14->57 59 Machine Learning detection for dropped file 14->59 23 WerFault.exe 23 9 14->23         started        25 cmd.exe 1 19->25         started        61 Infects executable files (exe, dll, sys, html) 21->61 27 cmd.exe 21->27         started        file8 signatures9 process10 process11 29 systemdll.exe 2 3 25->29         started        33 conhost.exe 25->33         started        35 conhost.exe 27->35         started        dnsIp12 49 newstub01.duckdns.org 185.56.80.120, 1888, 49745 NFORCENL Seychelles 29->49 79 Antivirus detection for dropped file 29->79 81 Multi AV Scanner detection for dropped file 29->81 83 Machine Learning detection for dropped file 29->83 85 Installs a global keyboard hook 29->85 signatures13
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a/
Threat name:
Win32.Virus.Jadtre
Create hunting rule
Status:
Malicious
First seen:
2022-07-18 04:50:00 UTC
File Type:
PE (Exe)
Extracted files:
10
AV detection:
25 of 26 (96.15%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j5ta5z6wk53y3sghqukld6sr6qw6zx6gdyowbhtkokdlulbay4fa._file
Result
Malware family:
remcos
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Score:
  10/10
Tags:
family:remcos botnet:windows aspackv2 persistence rat
Link:
https://tria.ge/reports/220728-rlpb1sgdg7/
Behaviour
Modifies registry class
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
ASPack v2.12-2.42
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
newstub01.duckdns.org:1888
Unpacked files
SH256 hash:
fab401839264951ace8adeeb73967b7cffbe13386963b9774e3bd24dc5038c0b
MD5 hash:
92015a39f056f84774c0266af0b97c76
SHA1 hash:
4a4c1511886ca761f7dd520f6ca2bfab191945c8
Detections:
win_unidentified_045_g0
Create hunting rule
win_unidentified_045_auto
Create hunting rule
Link:
https://www.unpac.me/results/2f1f6599-809b-4ecc-ac16-1600f43165fc/
SH256 hash:
4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a
MD5 hash:
335b1296fa572b01158f7e8ef89c7064
SHA1 hash:
4d41f80a6f2082acee991b6fdd830a3ae770ee6f
Detections:
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/2f1f6599-809b-4ecc-ac16-1600f43165fc/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:INDICATOR_EXE_Packed_ASPack
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with ASPack
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_unidentified_045_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.unidentified_045.

File information

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

Web download

Worm.Ramnit

Executable exe 4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2262230/
Cape
Cape
https://www.capesandbox.com/analysis/294945/

Comments


Avatar
zbet commented on 2022-07-28 14:16:27 UTC

url : hxxp://212.192.246.234/Tas/remcos_agent.exe