MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 833b575dac3a049ede0d27e2ff801d2e8d647cf04006f0037e1a9c71d7c8ace4. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 833b575dac3a049ede0d27e2ff801d2e8d647cf04006f0037e1a9c71d7c8ace4
SHA3-384 hash: 450d967b19154de29999405532bf7bdc3ecf599830567bb04fa3b0a366f5587a9e4d481a57a528bc94c3d8b82a388c02
SHA1 hash: ee5f3001986fa18f24e94b6befbdf3bfc7d26703
MD5 hash: 73ccd3185ab04e91e1e8b2fe3a762121
humanhash: sad-harry-spaghetti-thirteen
File name:Pago de datos bancarios,zip.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:839'856 bytes
First seen:2020-10-27 16:44:18 UTC
Last seen:2020-10-27 18:37:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 6144:an67HW7ZglOWMja1+dk+AZy5qCGtHqX4vdaiqkOc1/WjS7iB7AlttHOUjW5:an67HWlglOWEkHC44VOKS8It9VjW5
Threatray 981 similar samples on MalwareBazaar
TLSH 1505DA2D998415A3B133A676A0F54597BBA46DC67BF81C4B01C23B0939FAE033D9734E
Reporter abuse_ch
Tags:ESP exe geo nVpn RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: mail.nipponcarsrl.com.ar
Sending IP: 200.114.86.103
From: Hierrosur <ventas@hierrosur.com.uy>
Subject: Detalles del banco
Attachment: Pago de datos bancarios,zip.zip (contains "Pago de datos bancarios,zip.exe")

RemcosRAT C2:
newlogs.ddns.net:1655 (185.140.53.136)

Pointing to nVpn:

% Information related to '185.140.53.0 - 185.140.53.255'

% Abuse contact for '185.140.53.0 - 185.140.53.255' is 'abuse@privacyfirst.sh'

inetnum: 185.140.53.0 - 185.140.53.255
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-BE
country: BE
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2016-10-17T23:24:00Z
last-modified: 2020-10-02T20:59:33Z
source: RIPE

Intelligence

File Origin
# of uploads :
2
# of downloads :
83
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/80045/
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/514043
Signature
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
Icon mismatch, binary includes an icon from a different legit application in order to fool users
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
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: 306135 Sample: Pago de datos bancarios,zip.exe Startdate: 27/10/2020 Architecture: WINDOWS Score: 100 26 newlogs.ddns.net 2->26 30 Malicious sample detected (through community Yara rule) 2->30 32 Antivirus detection for dropped file 2->32 34 Antivirus / Scanner detection for submitted sample 2->34 36 14 other signatures 2->36 7 Pago de datos bancarios,zip.exe 1 4 2->7         started        11 vlc.exe 2->11         started        13 vlc.exe 1 2->13         started        signatures3 process4 file5 24 C:\Users\user\AppData\Roaming\...\vlc.exe, PE32 7->24 dropped 38 Injects a PE file into a foreign processes 7->38 15 Pago de datos bancarios,zip.exe 2 7->15         started        18 vlc.exe 11->18         started        20 vlc.exe 11->20         started        22 vlc.exe 13->22         started        signatures6 process7 dnsIp8 28 newlogs.ddns.net 185.140.53.136, 1655, 49745, 49750 DAVID_CRAIGGG Sweden 15->28
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/833b575dac3a049ede0d27e2ff801d2e8d647cf04006f0037e1a9c71d7c8ace4/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-10-27 15:24:21 UTC
AV detection:
24 of 28 (85.71%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qm5voxnmhicj5xqne7rp7aa5f2gwi7hqiadpaa36dkohdv6ivtsa._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
046ff9f608525faf76e353263ddad485e547ff4797b183ddd850f0f2c8209f91
RemcosRAT
3e306d7047d78c4f7381e51c0fa80b840e5fa76b14393195faea2791166671b5
RemcosRAT
4579780c18fb273fd0884237c7a4021dbbb38494194d8c1840449e8a62d29251
RemcosRAT
485c1301f4bc84bc2d274f53222cf7ca5fbd8af8728d1aaa977a6574f577fb87
RemcosRAT
65228df6e85371a2b4b1e5340f11e36cdc94f8b39bda216c0ed143eaac36912b
RemcosRAT
676deae3db8218b9bf16e0ae37abde30655464de43497b2af747e53626f3735e
RemcosRAT
b530ffc8af72cb51943f2fb8f38bc778c4544f57b61de593960dd4a97327ca64
RemcosRAT
c1b8ac7a35b93c51a87d3d4d6f55cf774073c476df7ed0104ca2f05072fedaa6
RemcosRAT
ca60958a09d1cd5817504857d90b846a9ce6f6ee1bed7686318b3741108b709c
RemcosRAT
e32decb9aac454a38a186b4f7bc59e471c78e2cf6a5fff25c0d8b68d1c46805c
RemcosRAT
+ 971 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-nm3x4pc512/
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:1655
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/833b575dac3a049ede0d27e2ff801d2e8d647cf04006f0037e1a9c71d7c8ace4

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: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: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

zip 28a35713fe73b7448ce4715d964ce5083762559cad72d725d395128eac891518

RemcosRAT

Executable exe 833b575dac3a049ede0d27e2ff801d2e8d647cf04006f0037e1a9c71d7c8ace4

(this sample)

  
Dropped by
MD5 d79f9b25850f539e80dd9f55387f1e97
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 28a35713fe73b7448ce4715d964ce5083762559cad72d725d395128eac891518
Cape
Cape
https://www.capesandbox.com/analysis/80045/

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