MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8737cdfdcf2aa430ccfa6b2c1834a3c0768c201f4a77e3e5315e2bdbc3134a68. 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: 13


Intelligence 13 IOCs YARA 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8737cdfdcf2aa430ccfa6b2c1834a3c0768c201f4a77e3e5315e2bdbc3134a68
SHA3-384 hash: 00eef6ade42263ef4886d49ee49b960fbfd6c4c4252959f650f6a5ecd2644a4c1361d5dec9865e6df743a38ecfe422d1
SHA1 hash: 3107d2f2f36c475ac73a187444b30b9e844ef153
MD5 hash: ceda33d4054ecb6658a9fc66d1717707
humanhash: washington-emma-zebra-july
File name:uitTYe3ZE5EMN3Z.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:325'120 bytes
First seen:2021-03-06 06:04:29 UTC
Last seen:2021-03-06 07:57:58 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:tDSjwx6OywSY8Rp10LKifVwLC9WQTKhxgmUXcSxvyfwGz6uiTB0x:RsRp10LzfVSC9WMKhxgLcisz6TBy
Threatray 1'626 similar samples on MalwareBazaar
TLSH D864CE41635482A5EFEC1BF56666D0C41375A2DA5C8FE3580D02A4EC28FEB6E34D38E7
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: slot0.julislinq.com
Sending IP: 194.31.96.36
From: Sales01 - PURCHASE <sales@julislinq.com>
Subject: RFQ/2021/03/05/Quotation/NEW ORDER/77028_2021030 APRIL DELIVERY 07
Attachment: Quotation 77028_20210305.iso (contains "uitTYe3ZE5EMN3Z.exe")

RemcosRAT C2:
sandshoe.myfirewall.org

Intelligence

File Origin
# of uploads :
2
# of downloads :
157
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
uitTYe3ZE5EMN3Z.exe
Verdict:
Malicious activity
Analysis date:
2021-03-06 06:06:21 UTC
Tags:
trojan rat remcos keylogger
Link:
https://app.any.run/tasks/aa931cb5-e494-4728-98f9-851f08f26929

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/122576/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.45842369.2494.6696.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a process with a hidden window
Deleting a recently created file
Running batch commands
Launching a process
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Result
Verdict:
MALICIOUS
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/630410
Signature
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Changes security center settings (notifications, updates, antivirus, firewall)
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
Detected unpacking (creates a PE file in dynamic memory)
Drops PE files with benign system names
Found malware configuration
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Sigma detected: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 364178 Sample: uitTYe3ZE5EMN3Z.exe Startdate: 06/03/2021 Architecture: WINDOWS Score: 100 94 Multi AV Scanner detection for domain / URL 2->94 96 Found malware configuration 2->96 98 Malicious sample detected (through community Yara rule) 2->98 100 8 other signatures 2->100 13 uitTYe3ZE5EMN3Z.exe 3 2->13         started        17 svchost.exe 2->17         started        19 svchost.exe 2->19         started        21 8 other processes 2->21 process3 dnsIp4 70 C:\Users\user\...\uitTYe3ZE5EMN3Z.exe.log, ASCII 13->70 dropped 110 Contains functionality to steal Chrome passwords or cookies 13->110 112 Contains functionality to capture and log keystrokes 13->112 114 Contains functionality to inject code into remote processes 13->114 120 2 other signatures 13->120 24 uitTYe3ZE5EMN3Z.exe 4 5 13->24         started        27 uitTYe3ZE5EMN3Z.exe 13->27         started        116 Changes security center settings (notifications, updates, antivirus, firewall) 17->116 29 MpCmdRun.exe 17->29         started        118 Injects a PE file into a foreign processes 19->118 31 svchost.exe 19->31         started        33 svchost.exe 19->33         started        74 127.0.0.1 unknown unknown 21->74 35 svchost.exe 21->35         started        file5 signatures6 process7 file8 66 C:\Users\user\AppData\Roaming\...\svchost.exe, PE32 24->66 dropped 68 C:\Users\user\...\svchost.exe:Zone.Identifier, ASCII 24->68 dropped 37 wscript.exe 1 24->37         started        39 conhost.exe 29->39         started        process9 process10 41 cmd.exe 1 37->41         started        process11 43 svchost.exe 3 41->43         started        46 conhost.exe 41->46         started        signatures12 102 Multi AV Scanner detection for dropped file 43->102 104 Detected unpacking (creates a PE file in dynamic memory) 43->104 106 Machine Learning detection for dropped file 43->106 108 Injects a PE file into a foreign processes 43->108 48 svchost.exe 43->48         started        52 svchost.exe 43->52         started        54 svchost.exe 43->54         started        process13 dnsIp14 72 sandshoe.myfirewall.org 45.154.4.68, 2404, 49724 COMBAHTONcombahtonGmbHDE Netherlands 48->72 86 System process connects to network (likely due to code injection or exploit) 48->86 88 Writes to foreign memory regions 48->88 90 Allocates memory in foreign processes 48->90 92 Injects a PE file into a foreign processes 48->92 56 svchost.exe 48->56         started        signatures15 process16 process17 58 iexplore.exe 56->58         started        dnsIp18 76 192.168.2.1 unknown unknown 58->76 61 iexplore.exe 58->61         started        64 iexplore.exe 58->64         started        process19 dnsIp20 78 github.com 140.82.121.4, 443, 49733, 49734 GITHUBUS United States 61->78 80 avatars.githubusercontent.com 185.199.110.133, 443, 49737, 49738 FASTLYUS Netherlands 61->80 82 consentdeliveryfd.azurefd.net 61->82 84 140.82.121.3, 443, 49747, 49748 GITHUBUS United States 64->84
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/8737cdfdcf2aa430ccfa6b2c1834a3c0768c201f4a77e3e5315e2bdbc3134a68/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-03-06 03:54:55 UTC
AV detection:
13 of 28 (46.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=q43437opfksdbth2nmwbqnfdyb3iyia7jj36hzjrlyv5xqytjjua._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
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RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
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61d9f4cbc76b7889d7d17d262b63c0fd2ee40642653063b1eb6ab84397f8c57b
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82027bdaf86e2d0da1c45ede5efd820a1cbaace1b1b8f7675b8115d82db75f26
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8bda5b7fc074f40d8bdfd2988879331a71142da4df8f0eb152f01b2602872464
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d34e588c8bef9cef39708c52f7f372bcd4b5fc39e4eaf0b9193aa586a10d7cc2
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dfd3c33bf7be405cea03a045f3df2d9ff35f04c7da918eb916b6f224a58eea1f
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e26c95b32b64e3f7b5d72d52be2fd7cb52c7a2c1df25f5337a783a1735f806ad
RemcosRAT
+ 1'616 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/210306-5bbg51vavj/
Behaviour
Modifies registry class
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
sandshoe.myfirewall.org:2404
Unpacked files
SH256 hash:
f763673837a3c425198e873d82498a24aafda884b09788f11f2b157f9e63d5d0
MD5 hash:
4b9bbbf463abe4b2adf501d287a67c96
SHA1 hash:
6d4be1ecd4c3c8710a68211cfba3bcd3f898a75e
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/843e119c-70b8-4127-9602-de43f1895dff/
Parent samples :
d0dde0ce53f187ed39096c8f44d89ad1afabe101156e03ce4a92f0021e74007a
0d087c258adf5b64cdfeb72b7f8d06a34f6b0ec4179938b34b3ac3009c946a0a
647bdf2171bb254e9d42588d2f58c26d7057daf80da8cd1ec70bb89d71b4d47a
8737cdfdcf2aa430ccfa6b2c1834a3c0768c201f4a77e3e5315e2bdbc3134a68
SH256 hash:
3bd226263b8948193138d63709ffb5a3df317af8d74cc313b90cdfdc4b857dc9
MD5 hash:
d495bee029026c4211c9357e37a7728d
SHA1 hash:
7e1e329b923d9ad3ab81dab5b5bb85254f261890
Link:
https://www.unpac.me/results/843e119c-70b8-4127-9602-de43f1895dff/
SH256 hash:
f8b5b51efedb3e87493ac2439473564603cc3059d57956f209a7310e311a1027
MD5 hash:
d66f89bf838fb52ed59d311a99aea214
SHA1 hash:
342525c4aabbb92abf51459081d34ed0f1cdc965
Link:
https://www.unpac.me/results/843e119c-70b8-4127-9602-de43f1895dff/
SH256 hash:
8737cdfdcf2aa430ccfa6b2c1834a3c0768c201f4a77e3e5315e2bdbc3134a68
MD5 hash:
ceda33d4054ecb6658a9fc66d1717707
SHA1 hash:
3107d2f2f36c475ac73a187444b30b9e844ef153
Link:
https://www.unpac.me/results/843e119c-70b8-4127-9602-de43f1895dff/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.98
Link:
https://yomi.yoroi.company/submissions/8737cdfdcf2aa430ccfa6b2c1834a3c0768c201f4a77e3e5315e2bdbc3134a68

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:unixredflags2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for UNIX red flags
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 44c3938b15f736f8eedf6f1ba83aea1443dac545f54cdfd47085bd73f366ca01

RemcosRAT

Executable exe 8737cdfdcf2aa430ccfa6b2c1834a3c0768c201f4a77e3e5315e2bdbc3134a68

(this sample)

  
Dropped by
MD5 e96d89d3ac6141a6319f316a5c1050a1
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/122576/
  
Dropped by
SHA256 44c3938b15f736f8eedf6f1ba83aea1443dac545f54cdfd47085bd73f366ca01

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