MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 437871e73dce9e56e01768fb210c20d2d0ae78f59875972f69b5ae4bdd9f188e. 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: 8


Intelligence 8 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 437871e73dce9e56e01768fb210c20d2d0ae78f59875972f69b5ae4bdd9f188e
SHA3-384 hash: e770727883ff0b311646f5816e13d17263359372067709d32aa2f7fff3ef583ce7efac8dc534202790937705db9e39ca
SHA1 hash: 210c3b22a87305f528d2dfa5ddfc47fdf539f3d9
MD5 hash: e2ac6ba94a75a79690926984963df2bb
humanhash: music-robin-oranges-victor
File name:PO APKI-180515 & FL-180515,pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:679'936 bytes
First seen:2020-07-17 16:23:12 UTC
Last seen:2020-07-17 17:23:25 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f2753f586d682a054d4c3492dcb05fd4 (2 x RemcosRAT, 1 x AveMariaRAT, 1 x Emotet)
ssdeep 12288:yFNC7LPHmafB+7Rp7rpizqscFciu4JopWdv2kv75MYBRRuiKvVL015wg:y/KPGk0Rp7rpiqscJxxdvxMYBR8W
Threatray 1'011 similar samples on MalwareBazaar
TLSH 49E49E72B29C85F7C12A2979CC0B56E4992ABE103E189C873BF53E4C5F39751363A097
Reporter abuse_ch
Tags:exe HostGator nVpn RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: gateway21.websitewelcome.com
Sending IP: 192.185.45.89
From: Stefanie Engelberth <sales@hkr.com.ph>
Subject: Purchase Order
Attachment: PO APKI-180515 FL-180515,pdf.iso (contains "PO APKI-180515 & FL-180515,pdf.exe")

RemcosRAT C2:
bossfrank.ddns.net:9967 (194.5.98.20)

Pointing to nVpn:

% Information related to '194.5.98.0 - 194.5.98.255'

% Abuse contact for '194.5.98.0 - 194.5.98.255' is 'abuse@privacyfirst.sh'

inetnum: 194.5.98.0 - 194.5.98.255
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-NOR
country: NO
descr: Sandefjord
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2019-04-26T16:42:54Z
last-modified: 2020-07-14T18:04:10Z
source: RIPE

Intelligence

File Origin
# of uploads :
2
# of downloads :
91
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/27471/
Detection(s):
PUA.Win.Adware.Slugin-6803969-0
Create hunting rule

PUA.Win.Adware.Slugin-6840354-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Sending an HTTP GET request
Creating a file in the %temp% subdirectories
Reading critical registry keys
Creating a file
Deleting a recently created file
Reading Telegram data
Running batch commands
Creating a process with a hidden window
Launching a process
Sending a TCP request to an infection source
Stealing user critical data
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/389150
Signature
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
Creates a thread in another existing process (thread injection)
Detected Remcos RAT
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 246769 Sample: PO APKI-180515 & FL-180515,... Startdate: 19/07/2020 Architecture: WINDOWS Score: 100 41 bossfrank.ddns.net 2->41 47 Malicious sample detected (through community Yara rule) 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 Detected Remcos RAT 2->51 53 7 other signatures 2->53 8 PO APKI-180515 & FL-180515,pdf.exe 1 17 2->8         started        13 mshta.exe 19 2->13         started        15 mshta.exe 19 2->15         started        signatures3 process4 dnsIp5 43 googlehosted.l.googleusercontent.com 172.217.18.1, 443, 49712, 49720 GOOGLEUS United States 8->43 45 doc-0k-b8-docs.googleusercontent.com 8->45 29 C:\Users\user\AppData\Local\...\Uaxdfck.exe, PE32 8->29 dropped 65 Writes to foreign memory regions 8->65 67 Allocates memory in foreign processes 8->67 69 Creates a thread in another existing process (thread injection) 8->69 71 Injects a PE file into a foreign processes 8->71 17 ieinstal.exe 2 8->17         started        20 Uaxdfck.exe 13 13->20         started        23 Uaxdfck.exe 13 15->23         started        file6 73 Uses dynamic DNS services 43->73 signatures7 process8 dnsIp9 31 bossfrank.ddns.net 17->31 33 googlehosted.l.googleusercontent.com 20->33 35 doc-0k-b8-docs.googleusercontent.com 20->35 55 Multi AV Scanner detection for dropped file 20->55 57 Writes to foreign memory regions 20->57 59 Allocates memory in foreign processes 20->59 25 ieinstal.exe 20->25         started        37 googlehosted.l.googleusercontent.com 23->37 39 doc-0k-b8-docs.googleusercontent.com 23->39 61 Creates a thread in another existing process (thread injection) 23->61 63 Injects a PE file into a foreign processes 23->63 27 ieinstal.exe 23->27         started        signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/437871e73dce9e56e01768fb210c20d2d0ae78f59875972f69b5ae4bdd9f188e/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-07-17 16:25:07 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=in4hdzz5z2pfnyaxnd5scdba2lik46hvtb2zol3jwwxexxm7dcha._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
28e5fa8a71a61c9a963340efa4179b8e1e966eca430c77f86c5795a28b66162a
RemcosRAT
2f07a5d8c1e6ac465e5d306b0fb8335aa41f3204b9bf9793337a849a93921a9a
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3bdfaf82d5d56f2546be44b3355f8d72cc0508984586e0fba3d704a5adabf7d1
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417022af236bc97978cd14c5ffb8e5ced3392987a8b73ae3a5f1906367419abd
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5623d23f830311afc91586eeae9824ede5dd4233d9b45a45a6bea4110514db48
RemcosRAT
56a2574ca6e3e3036a5bdcc9f17deade4bff0920373a8d9944fc9e297b970650
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64ba0f4265f9ed3f3f9315ee0256b360827074d5f898a7eb07ed98dd5f7fec7e
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a9b90669d9cd5ec23e141533e94adc37e8f27eeb683aa59c5cac7f17bf9ac827
RemcosRAT
c59842c19c1b3f0171b40eebfb3e98ddccc4237edcaaa62990a0881ee1f6f798
RemcosRAT
da7ce8060ef04b847aeb11d727b9d8fad9526dc3314adce4ffa5e0b597ac5547
RemcosRAT
+ 1'001 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
persistence rat family:remcos
Link:
https://tria.ge/reports/200717-sw1bll16me/
Behaviour
Suspicious use of WriteProcessMemory
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Remcos
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Unknown
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/437871e73dce9e56e01768fb210c20d2d0ae78f59875972f69b5ae4bdd9f188e

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: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

iso 09d6718003709e71a6e32bb017d84e2c6d133905ddfdd19da29139cd67beb760

RemcosRAT

Executable exe 437871e73dce9e56e01768fb210c20d2d0ae78f59875972f69b5ae4bdd9f188e

(this sample)

  
Dropped by
MD5 8904d9eada85ced2c4e5c59d738bc520
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 09d6718003709e71a6e32bb017d84e2c6d133905ddfdd19da29139cd67beb760
Cape
Cape
https://www.capesandbox.com/analysis/27471/

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