MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea. 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: 19


Intelligence 19 IOCs YARA 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea
SHA3-384 hash: 69c7a5fc1f408388f9baf7cf9d2e2f4256ca44fbf4dbc43507b00dcd4d99138f1c3ce1ecfbfffbd949234b0e23a4c922
SHA1 hash: 0d5edc5da2cba4ef3dabbec18fd9f85f8292e6a2
MD5 hash: 0c42f7d7e2c9019fce992f1d87a5595e
humanhash: six-green-potato-seven
File name:xsL8kfA6ldEW.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:480'768 bytes
First seen:2023-12-06 23:49:27 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 5d354883fe6f15fcf48045037a99fb7a (118 x RemcosRAT)
ssdeep 12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSdn9:uiLJbpI7I2WhQqZ7d9
Threatray 3'134 similar samples on MalwareBazaar
TLSH T1D3A4AE02BAD2C072D57161344D2AEB35DABDBD202835997B73E61D5BFD30180A73A7B2
TrID 32.2% (.EXE) Win64 Executable (generic) (10523/12/4)
20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.4% (.EXE) Win16 NE executable (generic) (5038/12/1)
13.7% (.EXE) Win32 Executable (generic) (4505/5/1)
6.2% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter pmelson
Tags:exe remcos RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
333
Origin country :
US US
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
xsL8kfA6ldEW.exe
Verdict:
Malicious activity
Analysis date:
2023-12-06 23:50:16 UTC
Tags:
keylogger rat remcos remote
Link:
https://app.any.run/tasks/285b4475-8963-4610-990d-8a1666db035f

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/463044/
Detection(s):
Win.Trojan.Remcos-9841897-0
Create hunting rule

Win.Trojan.Remcos-10002580-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %temp% subdirectories
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Creating a window
Running batch commands
Setting a keyboard event handler
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control evasive eventvwr fingerprint greyware hook keylogger lolbin shell32
Link:
https://www.filescan.io/uploads/657108ab56f85d0de414e67b/reports/2e350a1c-569f-4afe-abd0-78a124ed892f/overview
Verdict:
Malicious
Labled as:
Dacic.A9349469.A.Generic
Link:
https://www.hybrid-analysis.com/sample/77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/a6774a68-b3ba-407b-a230-3f5d0cba3fff
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1355041
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to modify clipboard data
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Found malware configuration
Installs a global keyboard hook
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
Uses dynamic DNS services
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1355041 Sample: xsL8kfA6ldEW.exe Startdate: 07/12/2023 Architecture: WINDOWS Score: 100 36 jackcopias.duckdns.org 2->36 38 geoplugin.net 2->38 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for URL or domain 2->50 54 7 other signatures 2->54 10 xsL8kfA6ldEW.exe 5 5 2->10         started        14 note.exe 2->14         started        signatures3 52 Uses dynamic DNS services 36->52 process4 file5 32 C:\Users\user\AppData\Local\Temp\...\note.exe, PE32 10->32 dropped 34 C:\Users\user\AppData\Local\...\install.vbs, data 10->34 dropped 64 Contains functionalty to change the wallpaper 10->64 66 Contains functionality to steal Chrome passwords or cookies 10->66 68 Contains functionality to register a low level keyboard hook 10->68 70 3 other signatures 10->70 16 wscript.exe 1 10->16         started        signatures6 process7 signatures8 44 Windows Scripting host queries suspicious COM object (likely to drop second stage) 16->44 19 cmd.exe 1 16->19         started        process9 process10 21 note.exe 2 19 19->21         started        26 conhost.exe 19->26         started        dnsIp11 40 jackcopias.duckdns.org 46.246.6.15, 49729, 49731, 49732 PORTLANEwwwportlanecomSE Sweden 21->40 42 geoplugin.net 178.237.33.50, 49730, 80 ATOM86-ASATOM86NL Netherlands 21->42 30 C:\ProgramData\key\logs.dat, data 21->30 dropped 56 Antivirus detection for dropped file 21->56 58 Multi AV Scanner detection for dropped file 21->58 60 Contains functionalty to change the wallpaper 21->60 62 6 other signatures 21->62 28 wscript.exe 21->28         started        file12 signatures13 process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea/
Threat name:
Win32.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2023-12-06 23:50:06 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
23 of 23 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=o7jay6ulppkt4cm5yc6jh7toxv326keisa3fsnm3wj22u4ziqxva._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
2f53875cb56cc1a1f69655fcfca71ac0f952b8d582bda33e101d8b262e38d0f9
RemcosRAT
31edb5c9a0590d100f941cfcb0c142abf141fba4a90c6bddb6c7fc59b4475f28
RemcosRAT
3ab2ca682019279e28525a8ff1a72e08badba1c0f3012f926bad1528b2b0944a
RemcosRAT
4774065c2fb27747ef38643fdf9e301b9801250e8edc6518c06c589baffc52c9
RemcosRAT
52d4cc0f07a62e6d37c82b33480131cc2c1d5b83d11104997f06cac4d8876f5d
RemcosRAT
68ab94c0010fc774ac9a19516648b177ab8762311e9a30f0beb49409b752dd78
RemcosRAT
8c2653e4d9998668579383d87f291afe6ba5740ec3bc6d8f44618c0f9af77189
RemcosRAT
a0a124777df35d015c84f61af9a8e4d0dba82120a30fa031b73b885a13d88214
RemcosRAT
b71c7db7c4b20c354f63820df1f5cd94dbec97849afa690675d221964b8176b5
RemcosRAT
d17ccb455ee24cc30f0bb0bdbfe244a388444b82ec069bb0766870b243f03695
RemcosRAT
+ 3'124 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:nuevos persistence rat
Link:
https://tria.ge/reports/231206-3vkkzagbhk/
Behaviour
Modifies registry class
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Remcos
Malware Config
C2 Extraction:
jackcopias.duckdns.org:8079
Unpacked files
SH256 hash:
77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea
MD5 hash:
0c42f7d7e2c9019fce992f1d87a5595e
SHA1 hash:
0d5edc5da2cba4ef3dabbec18fd9f85f8292e6a2
Detections:
Remcos
Create hunting rule
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
Link:
https://www.unpac.me/results/b4ee7310-2866-429c-b15c-41268ad10f58/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/77d20c7a8b7b/report/overview.html
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/77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

RemcosRAT

Executable exe 77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea

(this sample)

  
Link
https://www.virustotal.com/gui/file/77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/463044/

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