MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8052811ef3a3f57a2b9db12a20b689581aaf82d3dfdfbed0218f1ebfe0c50f0. 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 1 YARA 9 File information Comments
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SHA256 hash: b8052811ef3a3f57a2b9db12a20b689581aaf82d3dfdfbed0218f1ebfe0c50f0
SHA3-384 hash: 12cd117dfca6077c6da1ec34235d07c47147fc29cb46d760e5e7e679da41a447c59b86138707935581154450102dc5c3
SHA1 hash: b5cbef6654d77a3d64c5721736aad31fb8749ab0
MD5 hash: fee9d236a522bd0fe83db94f0926c32d
humanhash: echo-massachusetts-cola-gee
File name:Quotation-25-03-2021PDF.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:181'587 bytes
First seen:2021-03-25 02:35:29 UTC
Last seen:2021-03-25 04:44:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 7fa974366048f9c551ef45714595665e (946 x Formbook, 398 x Loki, 261 x AgentTesla)
ssdeep 3072:XTs3BxJNmJXLLTfspAV2VBanxSnC5YoAC5kZf7s8G4vPmllnBs2VyC:XAPQT0puZnxUCSogf7nG43mlBBVIC
Threatray 1'677 similar samples on MalwareBazaar
TLSH EF0412E67EF164EBF827A671427F9B7DF7FEB14123D1208B07185F6E6125281480A293
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
RemcosRAT C2:
103.114.106.35:5585

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
103.114.106.35:5585 https://threatfox.abuse.ch/ioc/4605/

Intelligence

File Origin
# of uploads :
2
# of downloads :
184
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Quotation-25-03-2021PDF.exe
Verdict:
Malicious activity
Analysis date:
2021-03-25 02:37:38 UTC
Tags:
installer trojan rat remcos keylogger
Link:
https://app.any.run/tasks/c0716a88-73d9-4611-affb-6ababb639e8c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.DeepScan.Generic.Remcos.3237E2BB.19180.28702.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Creating a file in the %AppData% subdirectories
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Creating a window
Deleting a recently created file
Running batch commands
Sending a custom TCP request
Sending a UDP request
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Setting a global event handler for the keyboard
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.
Malware family:
REMCOS
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/8493c396-d16c-4541-a1d3-1d16df67080e
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/653239
Signature
C2 URLs / IPs found in malware configuration
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 (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Suspicious Svchost Process
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 375561 Sample: Quotation-25-03-2021PDF.exe Startdate: 25/03/2021 Architecture: WINDOWS Score: 100 62 Found malware configuration 2->62 64 Malicious sample detected (through community Yara rule) 2->64 66 Multi AV Scanner detection for dropped file 2->66 68 7 other signatures 2->68 10 Quotation-25-03-2021PDF.exe 11 2->10         started        14 chrome.exe 11 2->14         started        16 chrome.exe 11 2->16         started        process3 file4 44 C:\Users\user\AppData\Local\...\j93e3.dll, PE32 10->44 dropped 70 Detected unpacking (changes PE section rights) 10->70 72 Detected unpacking (overwrites its own PE header) 10->72 74 Contains functionality to steal Chrome passwords or cookies 10->74 78 3 other signatures 10->78 18 Quotation-25-03-2021PDF.exe 4 5 10->18         started        21 svchost.exe 10->21         started        46 C:\Users\user\AppData\Local\...\j93e3.dll, PE32 14->46 dropped 76 Maps a DLL or memory area into another process 14->76 23 chrome.exe 14->23         started        48 C:\Users\user\AppData\Local\...\j93e3.dll, PE32 16->48 dropped 25 chrome.exe 16->25         started        signatures5 process6 file7 40 C:\Users\user\AppData\Roaming\...\chrome.exe, PE32 18->40 dropped 42 C:\Users\user\...\chrome.exe:Zone.Identifier, ASCII 18->42 dropped 27 wscript.exe 1 18->27         started        process8 process9 29 cmd.exe 1 27->29         started        process10 31 chrome.exe 11 29->31         started        35 conhost.exe 29->35         started        file11 50 C:\Users\user\AppData\Local\...\j93e3.dll, PE32 31->50 dropped 54 Multi AV Scanner detection for dropped file 31->54 56 Detected unpacking (changes PE section rights) 31->56 58 Detected unpacking (overwrites its own PE header) 31->58 60 4 other signatures 31->60 37 chrome.exe 2 3 31->37         started        signatures12 process13 dnsIp14 52 103.114.106.35, 49681, 5585 VNPT-AS-VNVIETNAMPOSTSANDTELECOMMUNICATIONSGROUPVN Viet Nam 37->52
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b8052811ef3a3f57a2b9db12a20b689581aaf82d3dfdfbed0218f1ebfe0c50f0/
Threat name:
Win32.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2021-03-25 01:35:40 UTC
AV detection:
12 of 48 (25.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xacsqepphi7vpivz3mjkec3iswa2v6bnhx67x3icddy6x7qmkdya._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4b8335250b1cfcb5fac9790261dd43f5efcbc187c68961ee5afd34662d0599ed
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
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61d9f4cbc76b7889d7d17d262b63c0fd2ee40642653063b1eb6ab84397f8c57b
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80633cf6f53854e8c478e74ae93e4456f7730d323ca9d57d445de570a7ee7f45
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82027bdaf86e2d0da1c45ede5efd820a1cbaace1b1b8f7675b8115d82db75f26
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d34e588c8bef9cef39708c52f7f372bcd4b5fc39e4eaf0b9193aa586a10d7cc2
RemcosRAT
dfd3c33bf7be405cea03a045f3df2d9ff35f04c7da918eb916b6f224a58eea1f
RemcosRAT
e26c95b32b64e3f7b5d72d52be2fd7cb52c7a2c1df25f5337a783a1735f806ad
RemcosRAT
+ 1'667 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/210325-2h7kd9nw8s/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
NSIS installer
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:
103.114.106.35:5585
Unpacked files
SH256 hash:
49c01e0c736345a6f5683efe177d0bc5de12b70c703121944c5d613e5c506680
MD5 hash:
dd2915a3ec85f8f2e7258a8e3e756d4e
SHA1 hash:
efe1798239e117b4a18dc64df37cb4cf57bd70d6
Link:
https://www.unpac.me/results/075c2231-3ca9-452f-9548-aaaf61fa2fd4/
SH256 hash:
b8052811ef3a3f57a2b9db12a20b689581aaf82d3dfdfbed0218f1ebfe0c50f0
MD5 hash:
fee9d236a522bd0fe83db94f0926c32d
SHA1 hash:
b5cbef6654d77a3d64c5721736aad31fb8749ab0
Link:
https://www.unpac.me/results/075c2231-3ca9-452f-9548-aaaf61fa2fd4/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b8052811ef3a3f57a2b9db12a20b689581aaf82d3dfdfbed0218f1ebfe0c50f0

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.

Comments