MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f31c3f1bc2ca3732cd557ec416ca54562daaf704f2d5b44e9b7d92d22168ac9e. 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: 13


Intelligence 13 IOCs YARA 4 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f31c3f1bc2ca3732cd557ec416ca54562daaf704f2d5b44e9b7d92d22168ac9e
SHA3-384 hash: f8811bb7d5f0636656dc3dd06faad9685dcf85eab66bd2f9e3280d31ce922d1346decb7efe5d38fb7bfe4db28d29de41
SHA1 hash: 62793b628b93eea608129e901303a4bbdb16b04b
MD5 hash: e55022c317eafa93da9321f293803119
humanhash: single-yankee-oven-texas
File name:e55022c317eafa93da9321f293803119
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'489'920 bytes
First seen:2022-01-08 11:24:56 UTC
Last seen:2022-01-08 12:44:45 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash c1d428a624f7ef12578461f043fa097d (2 x RemcosRAT)
ssdeep 24576:uHseI2qWcbOKEJHgVcXZSWf+DKtjdxjUjBpEanPHmE6lWaUexkEaHNYK3X7oy3Nw:4A2bbD69udKjBaI+lW+NapU6NVu
TLSH T1F2653395A2F9F046E14901F09235EEB4D9860DBF18CFB71F5AF95C93B87C8A3C918426
File icon (PE):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter zbetcheckin
Tags:32 exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
378
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
http://squidgame.to/mai.exe
Verdict:
Malicious activity
Analysis date:
2022-01-07 02:39:43 UTC
Tags:
rat remcos
Link:
https://app.any.run/tasks/5008f3aa-ae8a-4fed-9a26-f40551015ee7

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/217813/
Detection(s):
PUA.Win.Packer.Asprotect-3
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a process with a hidden window
Creating a window
DNS request
Running batch commands
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Forced shutdown of a system process
Enabling autorun
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/61d9749502e388f9fdb62875/reports/d9e502d9-f58d-4d41-91ec-c660d1f18a7a/overview
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3fafab84-9417-44e6-841d-874c97bc90f1
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/917128
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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
Creates an undocumented autostart registry key
Detected Remcos RAT
Found evasive API chain (may stop execution after checking mutex)
Found malware configuration
Found stalling execution ending in API Sleep call
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
PE file has nameless sections
Query firmware table information (likely to detect VMs)
Sigma detected: Suspect Svchost Activity
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: Suspicious Svchost Process
Sigma detected: WScript or CScript Dropper
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 549606 Sample: KhfGaAWnrU Startdate: 08/01/2022 Architecture: WINDOWS Score: 100 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 Antivirus / Scanner detection for submitted sample 2->48 50 10 other signatures 2->50 6 winsrar.exe 3 1 2->6         started        10 KhfGaAWnrU.exe 6 5 2->10         started        13 winsrar.exe 2->13         started        15 winsrar.exe 2->15         started        process3 dnsIp4 30 rm.dogetaxi.io 104.21.87.226, 2404 CLOUDFLARENETUS United States 6->30 32 178.20.44.131, 2404 ASN-FRWInternetServiceProviderIT Russian Federation 6->32 34 2 other IPs or domains 6->34 52 Antivirus detection for dropped file 6->52 54 Multi AV Scanner detection for dropped file 6->54 56 Detected Remcos RAT 6->56 66 7 other signatures 6->66 17 svchost.exe 6->17         started        20 iexplore.exe 6->20         started        24 C:\Users\user\AppData\Roaming\...\winsrar.exe, PE32 10->24 dropped 26 C:\Users\user\...\winsrar.exe:Zone.Identifier, ASCII 10->26 dropped 28 C:\Users\user\AppData\Local\...\install.vbs, data 10->28 dropped 58 Query firmware table information (likely to detect VMs) 10->58 60 Creates an undocumented autostart registry key 10->60 62 Contains functionality to steal Chrome passwords or cookies 10->62 22 wscript.exe 10->22         started        64 Tries to detect sandboxes / dynamic malware analysis system (registry check) 13->64 file5 signatures6 process7 signatures8 36 Found evasive API chain (may stop execution after checking mutex) 17->36 38 Query firmware table information (likely to detect VMs) 17->38 40 Contains functionality to steal Chrome passwords or cookies 17->40 42 2 other signatures 17->42
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f31c3f1bc2ca3732cd557ec416ca54562daaf704f2d5b44e9b7d92d22168ac9e/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2022-01-05 05:01:21 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
32 of 43 (74.42%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6mod6g6czi3tftkvp3cbnssukyw2v5ye6lk3itu3pwjneilivspa._file
Verdict:
malicious
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:pidron evasion persistence rat trojan
Link:
https://tria.ge/reports/220108-njajaschh8/
Behaviour
Modifies registry class
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Checks BIOS information in registry
Deletes itself
Loads dropped DLL
Adds policy Run key to start application
Executes dropped EXE
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Remcos
Malware Config
C2 Extraction:
rm.squidgame.to:2404
178.20.44.131:2404
rm.dogetaxi.io:2404
Unpacked files
SH256 hash:
ad93317eaa62633c5004c86c84179693849b4fc3236146b4e82ed5456a14c974
MD5 hash:
0820b5cabf4b1312f1f49a351f3b1b7c
SHA1 hash:
bbbd8052dc35531035f54830c97bc3e81167b79f
Detections:
win_remcos_g0
Create hunting rule
Link:
https://www.unpac.me/results/0cbb35a5-0495-4abe-9869-8ce23ff98232/
SH256 hash:
f31c3f1bc2ca3732cd557ec416ca54562daaf704f2d5b44e9b7d92d22168ac9e
MD5 hash:
e55022c317eafa93da9321f293803119
SHA1 hash:
62793b628b93eea608129e901303a4bbdb16b04b
Link:
https://www.unpac.me/results/0cbb35a5-0495-4abe-9869-8ce23ff98232/
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/f31c3f1bc2ca3732cd557ec416ca54562daaf704f2d5b44e9b7d92d22168ac9e

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:ach_RemcosRAT
Create hunting rule
Author:abuse.ch
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades

File information

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

Web download

RemcosRAT

Executable exe f31c3f1bc2ca3732cd557ec416ca54562daaf704f2d5b44e9b7d92d22168ac9e

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/217813/
  
URLhaus
https://urlhaus.abuse.ch/url/1957515/

Comments


Avatar
zbet commented on 2022-01-08 11:24:57 UTC

url : hxxp://squidgame.to/mai.exe