MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c1b8ac7a35b93c51a87d3d4d6f55cf774073c476df7ed0104ca2f05072fedaa6. 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: 9


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

SHA256 hash: c1b8ac7a35b93c51a87d3d4d6f55cf774073c476df7ed0104ca2f05072fedaa6
SHA3-384 hash: cbcb452d968c5fb099c1e4499649dd2cefa91cf4f3e3685aea7c3680658a07b2935e0d2f2407debb03ee33b044a87bce
SHA1 hash: 1f937a8e45dc362a008ecd66f72c3f3adeba4c03
MD5 hash: 6a65c8f64406d3f8a21f2d4b7de1eb10
humanhash: foxtrot-coffee-timing-sad
File name:INFO26OCTUBRE2020-NS10, pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:601'776 bytes
First seen:2020-10-27 12:15:22 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 6144:J98QBx6Fp18W/IXekLzFf4Pe0TyDrqq38O4oVotqkOc1/WjS7iB7AK:J98QBx6F7lgXPB0TyvqKd4oqyOKS8x
Threatray 978 similar samples on MalwareBazaar
TLSH D1D47A3D6E8826E36177E676A4F50587FEE8618673781C4B02C32B486D4AF123E9734D
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: s7.itlinkonline.com
Sending IP: 95.217.94.198
From: George Tzivelopoulos <ventas4@propaco.com.py>
Subject: PO 14704 - MEL - 20' TC Reefer / Sailing Schedule
Attachment: INFO26OCTUBRE2020-NS10, pdf.iso (contains "INFO26OCTUBRE2020-NS10, pdf.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
71
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/79848/
Detection(s):
PUA.Win.Trojan.Generic-6629274-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Using the Windows Management Instrumentation requests
Creating a file in the %AppData% subdirectories
Unauthorized injection to a recently created process
Creating a file
DNS request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Connection attempt to an infection source
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/513442
Signature
.NET source code contains very large strings
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 305844 Sample: INFO26OCTUBRE2020-NS10, pdf.exe Startdate: 27/10/2020 Architecture: WINDOWS Score: 100 23 newlogs.ddns.net 2->23 27 Malicious sample detected (through community Yara rule) 2->27 29 Antivirus detection for dropped file 2->29 31 Antivirus / Scanner detection for submitted sample 2->31 33 12 other signatures 2->33 7 INFO26OCTUBRE2020-NS10, pdf.exe 1 4 2->7         started        10 vlc.exe 1 2->10         started        12 vlc.exe 2->12         started        signatures3 process4 file5 21 C:\Users\user\AppData\Roaming\...\vlc.exe, PE32 7->21 dropped 14 INFO26OCTUBRE2020-NS10, pdf.exe 2 7->14         started        17 vlc.exe 10->17         started        19 vlc.exe 12->19         started        process6 dnsIp7 25 newlogs.ddns.net 185.140.53.136, 1765, 49756, 49757 DAVID_CRAIGGG Sweden 14->25
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c1b8ac7a35b93c51a87d3d4d6f55cf774073c476df7ed0104ca2f05072fedaa6/
Threat name:
ByteCode-MSIL.Spyware.Stelega
Create hunting rule
Status:
Malicious
First seen:
2020-10-26 15:45:48 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yg4ky6rvxe6fdkd5hvgw6vopo5ahhrdw357naecmulyfa4x63kta._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
046ff9f608525faf76e353263ddad485e547ff4797b183ddd850f0f2c8209f91
RemcosRAT
485c1301f4bc84bc2d274f53222cf7ca5fbd8af8728d1aaa977a6574f577fb87
RemcosRAT
65228df6e85371a2b4b1e5340f11e36cdc94f8b39bda216c0ed143eaac36912b
RemcosRAT
657bd208e9f01abcb7b4e19d05d194ac8f2430098086d2de736080ba382dea6d
RemcosRAT
7a6f6659840dc30d797d816e1b2bbeb847c36c2e330fe45369b9037a113e8bc6
RemcosRAT
b530ffc8af72cb51943f2fb8f38bc778c4544f57b61de593960dd4a97327ca64
RemcosRAT
bfa4daa95a303253a45cc02597d1fa404168fb88e627dc3afa4b3548a6ff893d
RemcosRAT
ca60958a09d1cd5817504857d90b846a9ce6f6ee1bed7686318b3741108b709c
RemcosRAT
cb4567c5c6b82e5de38e47ac7047d3d7d072d3b235ff537090ee5d96fcf1e22b
RemcosRAT
d34e588c8bef9cef39708c52f7f372bcd4b5fc39e4eaf0b9193aa586a10d7cc2
RemcosRAT
+ 968 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201027-gyjmef4tc2/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Remcos
Malware Config
C2 Extraction:
newlogs.ddns.net:1765
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Backdoor
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c1b8ac7a35b93c51a87d3d4d6f55cf774073c476df7ed0104ca2f05072fedaa6

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.

ab2550cd94cac17e1ba9fd1d72eda952

RemcosRAT

Executable exe c1b8ac7a35b93c51a87d3d4d6f55cf774073c476df7ed0104ca2f05072fedaa6

(this sample)

  
Dropped by
MD5 ab2550cd94cac17e1ba9fd1d72eda952
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/79848/

Comments