MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012. 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: 16


Intelligence 16 IOCs YARA 29 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012
SHA3-384 hash: 78729b0cba58a479df8c9cfaac91bffd4aca7935e2ce898bd379358c18d7e7b3dd51abecfc66bc8c121c44e1f5a80e34
SHA1 hash: ace83a713e24f7e226eafa097e38f3608eb1119c
MD5 hash: d6c1329fbb12e8c9c4b3f2cb3d85d74f
humanhash: hawaii-cold-shade-alanine
File name:FAT0987660009800000.BAT
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:404'447 bytes
First seen:2023-11-20 07:51:12 UTC
Last seen:2023-11-20 09:31:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b76363e9cb88bf9390860da8e50999d2 (464 x Formbook, 184 x AgentTesla, 122 x SnakeKeylogger)
ssdeep 12288:C/RmBrhEQbVeASKuUXibskHkVw/WQ+03bm:MRmPEyVOlRiwV+
TLSH T1B984235F03D9C9F3D04E46311A697568C37EA222893B9E8BA3461F771D26AC39F47086
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
304
Origin country :
DE DE
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/459256/
Detection(s):
SecuriteInfo.com.BackDoor.Remcos.384.23490.31148.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Reading critical registry keys
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Stealing user critical data
Gathering data
Gathering data
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012
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/7a7686ac-b5a8-41c9-b2a9-c8d3ed5acff9
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1345015
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to inject code into remote processes
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
Detected unpacking (changes PE section rights)
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Snort IDS alert for network traffic
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 / registry access)
Tries to steal Mail credentials (via file registry)
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1345015 Sample: FAT0987660009800000.BAT.exe Startdate: 20/11/2023 Architecture: WINDOWS Score: 100 40 geoplugin.net 2->40 54 Snort IDS alert for network traffic 2->54 56 Multi AV Scanner detection for domain / URL 2->56 58 Found malware configuration 2->58 60 9 other signatures 2->60 9 FAT0987660009800000.BAT.exe 17 2->9         started        12 xtdmirbwgcluqa.exe 2->12         started        15 xtdmirbwgcluqa.exe 2->15         started        signatures3 process4 file5 38 C:\Users\user\AppData\Local\...\gmcxoyu.exe, PE32 9->38 dropped 17 gmcxoyu.exe 1 2 9->17         started        64 Multi AV Scanner detection for dropped file 12->64 66 Machine Learning detection for dropped file 12->66 68 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 12->68 21 xtdmirbwgcluqa.exe 12->21         started        70 Maps a DLL or memory area into another process 15->70 23 xtdmirbwgcluqa.exe 15->23         started        signatures6 process7 file8 36 C:\Users\user\AppData\...\xtdmirbwgcluqa.exe, PE32 17->36 dropped 46 Multi AV Scanner detection for dropped file 17->46 48 Contains functionality to bypass UAC (CMSTPLUA) 17->48 50 Detected unpacking (changes PE section rights) 17->50 52 11 other signatures 17->52 25 gmcxoyu.exe 3 13 17->25         started        signatures9 process10 dnsIp11 42 107.175.229.139, 49705, 49706, 8087 AS-COLOCROSSINGUS United States 25->42 44 geoplugin.net 178.237.33.50, 49707, 80 ATOM86-ASATOM86NL Netherlands 25->44 62 Maps a DLL or memory area into another process 25->62 29 gmcxoyu.exe 1 25->29         started        32 gmcxoyu.exe 1 25->32         started        34 gmcxoyu.exe 2 25->34         started        signatures12 process13 signatures14 72 Tries to steal Instant Messenger accounts or passwords 29->72 74 Tries to steal Mail credentials (via file / registry access) 29->74 76 Tries to harvest and steal browser information (history, passwords, etc) 32->76
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012/
Threat name:
Win32.Trojan.BazarLoader
Create hunting rule
Status:
Malicious
First seen:
2023-11-14 10:28:26 UTC
File Type:
PE (Exe)
Extracted files:
2
AV detection:
20 of 22 (90.91%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=dsgrxvb3blno5v45d2i7woxv3baotrb3cuux3u2h6yjwdtfpwaja._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:john-pc collection persistence rat spyware stealer upx
Link:
https://tria.ge/reports/231120-jqdgbafc6y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
UPX packed file
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
107.175.229.139:8087
Unpacked files
SH256 hash:
3b6183bf66d46e271c12fcf794cb6e14e711ea306e704f2d6790f5510f7855d5
MD5 hash:
8e8df9844c0cb05f966a5cb8374ca86b
SHA1 hash:
b8a71b281edb177b11d11fbd93c5a259e0d2ecb4
Detections:
Remcos
Create hunting rule
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
Link:
https://www.unpac.me/results/f468b9a9-3e30-4771-a066-6548c5c4584c/
Parent samples :
e8a357b793e4a0577c451067faaecca2c5ea1746d91ef3a7120020aabc5ec7bf
1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012
SH256 hash:
8cd90d016a38ca66d04073da84740cde47c3356bfb433da50d50ee024f6914f2
MD5 hash:
b0d33d32ec83bf9e60304365143ac8a3
SHA1 hash:
e1a88f950e207c2b77ad2b1f10be154e8bb13349
Link:
https://www.unpac.me/results/f468b9a9-3e30-4771-a066-6548c5c4584c/
SH256 hash:
1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012
MD5 hash:
d6c1329fbb12e8c9c4b3f2cb3d85d74f
SHA1 hash:
ace83a713e24f7e226eafa097e38f3608eb1119c
Link:
https://www.unpac.me/results/f468b9a9-3e30-4771-a066-6548c5c4584c/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/1c8d1bd43b0a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012

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:BLOWFISH_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
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_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:QbotStuff
Create hunting rule
Author:anonymous
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:TeslaCryptPackedMalware
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser
Create hunting rule
Author:malware-lu
Rule name:UPXv20MarkusLaszloReiser
Create hunting rule
Author:malware-lu
Rule name:upx_3
Create hunting rule
Author:Kevin Falcoz
Description:UPX 3.X
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_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
Rule name:yara_template
Create hunting rule

File information

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

Malspam

RemcosRAT

Executable exe 1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/459256/

Comments