MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90. 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: 12


Intelligence 12 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90
SHA3-384 hash: 721f0a6877c4a352039d402e3b6b3cc378e688cca695797cfff3b4cd6f4beea913d692349d590c9e7a915d2b2c6f7fa9
SHA1 hash: 8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6
MD5 hash: e17a0488de5ca3c73672541143ee6927
humanhash: carbon-sink-island-oklahoma
File name:i5TiYkAYkWJy1O8.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:791'040 bytes
First seen:2021-01-12 07:22:09 UTC
Last seen:2021-01-12 14:12:01 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'753 x AgentTesla, 19'658 x Formbook, 12'249 x SnakeKeylogger)
ssdeep 12288:ghiaeUtDq4QWvCV276rqpSKrjS6qyTaSwl6q:ghleUs4QWvR+2EK/uyTs
Threatray 1'345 similar samples on MalwareBazaar
TLSH F1F45A618F929751D7AC13FD2411016227E1DF79E3E8EB68ED8970B26F76A2801FD1C2
Reporter abuse_ch
Tags:exe nVpn Rackspace RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: smtp71.iad3a.emailsrvr.com
Sending IP: 173.203.187.71
From: Comercio E Industria <clusk@stmschool.zzn.com>
Subject: 2021 Brochure Attached
Attachment: Brochure.7z (contains "i5TiYkAYkWJy1O8.exe")

RemcosRAT C2:
185.244.26.208:29100

Hosted on nVpn:

% Information related to '185.244.26.0 - 185.244.26.255'

% Abuse contact for '185.244.26.0 - 185.244.26.255' is 'abuse@privacyfirst.sh'

inetnum: 185.244.26.0 - 185.244.26.255
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-EU3
country: EU
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2020-11-22T02:00:16Z
last-modified: 2020-11-22T23:55:31Z
source: RIPE

Intelligence

File Origin
# of uploads :
3
# of downloads :
183
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
i5TiYkAYkWJy1O8.exe
Verdict:
Malicious activity
Analysis date:
2021-01-12 08:49:46 UTC
Tags:
rat remcos
Link:
https://app.any.run/tasks/8c974b59-5753-41f7-b353-f8e66c6590df

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/111420/
Detection(s):
SecuriteInfo.com.generic.ml.25256.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 with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
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:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/578767
Signature
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
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
Sigma detected: Scheduled temp file as task from temp location
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM_3
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 338432 Sample: i5TiYkAYkWJy1O8.exe Startdate: 12/01/2021 Architecture: WINDOWS Score: 100 80 Malicious sample detected (through community Yara rule) 2->80 82 Multi AV Scanner detection for dropped file 2->82 84 Sigma detected: Scheduled temp file as task from temp location 2->84 86 9 other signatures 2->86 11 i5TiYkAYkWJy1O8.exe 7 2->11         started        15 remcos.exe 2->15         started        17 remcos.exe 3 2->17         started        process3 dnsIp4 66 C:\Users\user\AppData\...\LChCpmvhHgIatd.exe, PE32 11->66 dropped 68 C:\...\LChCpmvhHgIatd.exe:Zone.Identifier, ASCII 11->68 dropped 70 C:\Users\user\AppData\Local\...\tmp65D4.tmp, XML 11->70 dropped 72 C:\Users\user\...\i5TiYkAYkWJy1O8.exe.log, ASCII 11->72 dropped 96 Contains functionality to steal Chrome passwords or cookies 11->96 98 Contains functionality to capture and log keystrokes 11->98 100 Contains functionality to inject code into remote processes 11->100 102 Contains functionality to steal Firefox passwords or cookies 11->102 20 i5TiYkAYkWJy1O8.exe 4 5 11->20         started        23 schtasks.exe 1 11->23         started        25 schtasks.exe 15->25         started        27 remcos.exe 15->27         started        29 remcos.exe 15->29         started        74 127.0.0.1 unknown unknown 17->74 file5 signatures6 process7 file8 62 C:\Users\user\AppData\Roaming\...\remcos.exe, PE32 20->62 dropped 64 C:\Users\user\...\remcos.exe:Zone.Identifier, ASCII 20->64 dropped 31 wscript.exe 1 20->31         started        33 conhost.exe 23->33         started        35 conhost.exe 25->35         started        process9 process10 37 cmd.exe 1 31->37         started        process11 39 remcos.exe 4 37->39         started        42 conhost.exe 37->42         started        signatures12 94 Machine Learning detection for dropped file 39->94 44 remcos.exe 2 1 39->44         started        48 schtasks.exe 1 39->48         started        process13 dnsIp14 78 185.244.26.208, 29100, 49730, 49735 VAMU-ASIP-TRANSITVAMURU Netherlands 44->78 104 Injects a PE file into a foreign processes 44->104 50 remcos.exe 44->50         started        53 remcos.exe 44->53         started        55 remcos.exe 44->55         started        60 3 other processes 44->60 58 conhost.exe 48->58         started        signatures15 process16 dnsIp17 88 Tries to steal Instant Messenger accounts or passwords 50->88 90 Tries to steal Mail credentials (via file access) 50->90 92 Tries to harvest and steal browser information (history, passwords, etc) 53->92 76 192.168.2.1 unknown unknown 55->76 signatures18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90/
Threat name:
Win32.Trojan.Pwsx
Create hunting rule
Status:
Malicious
First seen:
2021-01-12 02:22:18 UTC
AV detection:
3 of 46 (6.52%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=lfshttlx4jpf23n7bnbbv77qje4qqe6mevfosd4gv4akcc67n6ia._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
11b16ba733f2f4f10ac58021eecaf5668551a73e2a1acfae99745c50bfccbb44
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21691425c52cf7a77c0e3a65cc1c0c59cb026d5b76e78160ebb8a553f9bbe50c
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4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
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61d9f4cbc76b7889d7d17d262b63c0fd2ee40642653063b1eb6ab84397f8c57b
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82027bdaf86e2d0da1c45ede5efd820a1cbaace1b1b8f7675b8115d82db75f26
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9930543939f97818319ed031530d9e084994331aa4b06a304faeb321bbcc63db
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d34e588c8bef9cef39708c52f7f372bcd4b5fc39e4eaf0b9193aa586a10d7cc2
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e26c95b32b64e3f7b5d72d52be2fd7cb52c7a2c1df25f5337a783a1735f806ad
RemcosRAT
+ 1'335 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat spyware
Link:
https://tria.ge/reports/210112-emsygcgxaa/
Behaviour
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Reads user/profile data of web browsers
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
185.244.26.208:29100
Unpacked files
SH256 hash:
596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90
MD5 hash:
e17a0488de5ca3c73672541143ee6927
SHA1 hash:
8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6
Link:
https://www.unpac.me/results/77c16a7a-bfba-41c9-bee8-15de8de44d11/
SH256 hash:
296620e9308a1069ca98d27c426f25f5c1f87d9240bb371c657571034b0261b5
MD5 hash:
4cf24d41a7882216740280e3294cb853
SHA1 hash:
6bcb31d3dc0a7d71da1067a628168664202769a4
Link:
https://www.unpac.me/results/77c16a7a-bfba-41c9-bee8-15de8de44d11/
SH256 hash:
4f163be4b51c4de27ef55491c280300aa3938bda6cc4894347f1db844d913bfe
MD5 hash:
b9d15ebe4cdf4a0d8ecc898ae436699c
SHA1 hash:
325537c9e1b1563907ce02f006d4469fd3adf880
Link:
https://www.unpac.me/results/77c16a7a-bfba-41c9-bee8-15de8de44d11/
SH256 hash:
70e663c05353203e39540a6aabad3d425bf07a2c82886b8d3ec0a84f2b89a133
MD5 hash:
1186412a53c5a3d1d245dab5664dd6f2
SHA1 hash:
46383237de18c4654690d54b32165829a4bfc879
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/77c16a7a-bfba-41c9-bee8-15de8de44d11/
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/596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

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 333030b4a6359cc44483f10aaf72d11114fba0ea38729dc567ee232faad9b0f2

RemcosRAT

Executable exe 596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

(this sample)

  
Dropped by
MD5 84e6280e00b34fdce8a7b5c7766cfa3d
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 333030b4a6359cc44483f10aaf72d11114fba0ea38729dc567ee232faad9b0f2
Cape
Cape
https://www.capesandbox.com/analysis/111420/

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