MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 43161c0778fd7277ad2d18d914e616e1ada7458ed92dff0d874fe5dd964c1975. 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: 11


Intelligence 11 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 43161c0778fd7277ad2d18d914e616e1ada7458ed92dff0d874fe5dd964c1975
SHA3-384 hash: 1814294cc6839f20c771164c025bcb2cab8c2a51a12232e53b6e05564094569b4d9614a73f462ccaef9da14a03acaefb
SHA1 hash: 2297d93e6223f8b03bccdb273ed0039ba8a77bd3
MD5 hash: 5b58aebe0dd52b528d61475c704dd359
humanhash: solar-fillet-sink-fish
File name:AS006-20211201.pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:863'232 bytes
First seen:2021-01-13 20:16:04 UTC
Last seen:2021-01-13 21:59:10 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'664 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:kAAc1rE9uflDML8Rv+vOf4ikNOt/0CL5Glvd99j0ah2/a0XJtb85OEwi+SwhvEEN:k7cYDOLi1EANGn9YcN1X73yAFXslcd
Threatray 1'373 similar samples on MalwareBazaar
TLSH D0054A4557808713E3BC36BD5028126117E0E7BDBAB9D76DFD007067AE62B9804FE7A2
Reporter abuse_ch
Tags:exe nVpn RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: server02.netcloudns.com
Sending IP: 148.251.129.209
From: Shirley Liow <liuli1@techaser.com>
Subject: 回复: 回复: Booking Confirmation
Attachment: AS006-20211201.pdf.7z (contains "AS006-20211201.pdf.exe")

RemocsRAT C2:
91.193.75.185:1989

Hosted on nVpn:

% Information related to '91.193.75.0 - 91.193.75.255'

% Abuse contact for '91.193.75.0 - 91.193.75.255' is 'abuse@privacyfirst.sh'

inetnum: 91.193.75.0 - 91.193.75.255
descr: Moscow, Russia
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-RU2
country: RU
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
abuse-c: ACRO34258-RIPE
mnt-by: PRIVACYFIRST-MNT
mnt-by: RIPE-NCC-END-MNT
org: ORG-KHd1-RIPE
status: ASSIGNED PI
created: 2012-06-04T11:05:55Z
last-modified: 2021-01-03T20:17:23Z
source: RIPE
sponsoring-org: ORG-MW1-RIPE

Intelligence

File Origin
# of uploads :
2
# of downloads :
172
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
AS006-20211201.pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-01-14 05:21:40 UTC
Tags:
rat remcos
Link:
https://app.any.run/tasks/fb791de9-a8f7-4c5e-b4b7-c6de08697e4b

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/111858/
Detection(s):
SecuriteInfo.com.Generic.mg.5b58aebe0dd52b52.19053.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Creating a file in the %AppData% subdirectories
Creating a process from a recently created file
Running batch commands
Enabling autorun by creating a file
Result
Verdict:
SUSPICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/580635
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Detected Remcos RAT
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
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
Sigma detected: Remcos
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Double Extension
Sigma detected: Suspicious Svchost Process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses an obfuscated file name to hide its real file extension (double extension)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM_3
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 339361 Sample: AS006-20211201.pdf.exe Startdate: 13/01/2021 Architecture: WINDOWS Score: 100 75 avatars3.githubusercontent.com 2->75 77 avatars1.githubusercontent.com 2->77 79 2 other IPs or domains 2->79 99 Malicious sample detected (through community Yara rule) 2->99 101 Multi AV Scanner detection for dropped file 2->101 103 Sigma detected: Scheduled temp file as task from temp location 2->103 105 13 other signatures 2->105 14 AS006-20211201.pdf.exe 7 2->14         started        signatures3 process4 file5 69 C:\Users\user\AppData\...\eWtjKWNXZtIZ.exe, PE32 14->69 dropped 71 C:\Users\user\AppData\Local\...\tmp5BCD.tmp, XML 14->71 dropped 73 C:\Users\user\...\AS006-20211201.pdf.exe.log, ASCII 14->73 dropped 121 Contains functionality to steal Chrome passwords or cookies 14->121 123 Contains functionality to capture and log keystrokes 14->123 125 Contains functionality to inject code into remote processes 14->125 127 2 other signatures 14->127 18 AS006-20211201.pdf.exe 3 5 14->18         started        21 schtasks.exe 1 14->21         started        signatures6 process7 file8 63 C:\Users\user\AppData\...\system32.exe, PE32 18->63 dropped 65 C:\Users\...\system32.exe:Zone.Identifier, ASCII 18->65 dropped 23 wscript.exe 1 18->23         started        25 conhost.exe 21->25         started        process9 process10 27 cmd.exe 1 23->27         started        process11 29 system32.exe 5 27->29         started        33 conhost.exe 27->33         started        file12 67 C:\Users\user\AppData\...\system32.exe.log, ASCII 29->67 dropped 113 Multi AV Scanner detection for dropped file 29->113 115 Contains functionality to steal Chrome passwords or cookies 29->115 117 Contains functionality to capture and log keystrokes 29->117 119 2 other signatures 29->119 35 system32.exe 3 1 29->35         started        39 schtasks.exe 1 29->39         started        signatures13 process14 dnsIp15 81 91.193.75.185, 1989, 49728 DAVID_CRAIGGG Serbia 35->81 107 Writes to foreign memory regions 35->107 109 Allocates memory in foreign processes 35->109 111 Injects a PE file into a foreign processes 35->111 41 svchost.exe 2 12 35->41         started        43 svchost.exe 35->43         started        45 svchost.exe 35->45         started        47 svchost.exe 35->47         started        49 conhost.exe 39->49         started        signatures16 process17 process18 51 iexplore.exe 41->51         started        dnsIp19 83 192.168.2.1 unknown unknown 51->83 54 iexplore.exe 51->54         started        57 iexplore.exe 51->57         started        59 iexplore.exe 51->59         started        61 2 other processes 51->61 process20 dnsIp21 85 avatars3.githubusercontent.com 54->85 95 4 other IPs or domains 54->95 87 avatars3.githubusercontent.com 57->87 89 avatars1.githubusercontent.com 57->89 91 avatars3.githubusercontent.com 59->91 93 avatars1.githubusercontent.com 59->93 97 5 other IPs or domains 61->97
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/43161c0778fd7277ad2d18d914e616e1ada7458ed92dff0d874fe5dd964c1975/
Threat name:
ByteCode-MSIL.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2021-01-13 16:54:16 UTC
AV detection:
22 of 46 (47.83%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=imlbyb3y7vzhpljnddmrjzqw4gw2ormo3ew76dmhj7s53fsmdf2q._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
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RemcosRAT
+ 1'363 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos rat
Link:
https://tria.ge/reports/210113-hvt7sz98w6/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
91.193.75.185:1989
Unpacked files
SH256 hash:
43161c0778fd7277ad2d18d914e616e1ada7458ed92dff0d874fe5dd964c1975
MD5 hash:
5b58aebe0dd52b528d61475c704dd359
SHA1 hash:
2297d93e6223f8b03bccdb273ed0039ba8a77bd3
Link:
https://www.unpac.me/results/54b54bd6-2da2-44af-82f5-28c661897d20/
SH256 hash:
296620e9308a1069ca98d27c426f25f5c1f87d9240bb371c657571034b0261b5
MD5 hash:
4cf24d41a7882216740280e3294cb853
SHA1 hash:
6bcb31d3dc0a7d71da1067a628168664202769a4
Link:
https://www.unpac.me/results/54b54bd6-2da2-44af-82f5-28c661897d20/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/43161c0778fd7277ad2d18d914e616e1ada7458ed92dff0d874fe5dd964c1975

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:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
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:autogenerated rule brought to you by yara-signator

File information

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

Malspam

RemcosRAT

7z 53155726e0b3390ad977457fafd7c2c730fde86c1e7490701ffa011e8db19a65

RemcosRAT

Executable exe 43161c0778fd7277ad2d18d914e616e1ada7458ed92dff0d874fe5dd964c1975

(this sample)

  
Dropped by
MD5 b32a44942a38f043d46a5d1bd37b43f8
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/111858/
  
Dropped by
SHA256 53155726e0b3390ad977457fafd7c2c730fde86c1e7490701ffa011e8db19a65

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