MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7. 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: 18


Intelligence 18 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7
SHA3-384 hash: c60f92364b4ea9313c780e64a23fc99f8b17488a9c48ccd304d1aed241f24365287d4279bf900fc174f02a4191a399e4
SHA1 hash: 24dee8ac5b363434ee482b14ad6a6d0e3d3ad312
MD5 hash: e75f765cc60c22c945c2c4f2916ae873
humanhash: xray-nitrogen-finch-minnesota
File name:bREI.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:238'592 bytes
First seen:2023-11-20 05:07:23 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash bc4f8e98d1041d53dd63bfb91ed10d0a (52 x RemcosRAT)
ssdeep 3072:YOSI2I7txG68nYrugMZJMfsciIpuKNtrUQlAK3qSjYPS+IAXb3Ixi5eFrgurIlN3:hvG68YrvM80ypnjAedo3qiGUY2ChzI
TLSH T15B3412641722F94AF0E0A0BCD944E9F25AA57C602D8B6F4E43ECFF17F917041E68E166
TrID 54.9% (.EXE) UPX compressed Win32 Executable (27066/9/6)
13.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
10.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
9.1% (.EXE) Win32 Executable (generic) (4505/5/1)
4.1% (.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 :
323
Origin country :
US US
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
bREI.exe
Verdict:
Malicious activity
Analysis date:
2023-11-20 05:10:26 UTC
Tags:
remcos
Link:
https://app.any.run/tasks/cd892041-1d53-4486-82d0-b6e025c5423d

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/459200/
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
Launching cmd.exe command interpreter
Creating a file in the %temp% subdirectories
Launching a process
Creating a file
Creating a process from a recently created file
Creating a window
Sending a custom TCP request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Blocking the User Account Control
Query of malicious DNS domain
Gathering data
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
greyware lolbin packed packed packed shell32 upx
Link:
https://www.filescan.io/uploads/655ae9b2b0ee3ed1bf6a346f/reports/9a37b524-b48f-4812-9fb2-0b8926977bd2/overview
Verdict:
Malicious
Labled as:
Dacic.A9349469.A.Generic
Link:
https://www.hybrid-analysis.com/sample/b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7
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/7f9ff5a5-b590-4430-a2f6-915c123da5d3
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1344935
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 bypass UAC (CMSTPLUA)
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
Creates autostart registry keys with suspicious names
Delayed program exit found
Disables UAC (registry)
Found malware configuration
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
Uses cmd line tools excessively to alter registry or file data
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1344935 Sample: bREI.exe Startdate: 20/11/2023 Architecture: WINDOWS Score: 100 40 0.tcp.sa.ngrok.io 2->40 48 Multi AV Scanner detection for domain / URL 2->48 50 Found malware configuration 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 8 other signatures 2->54 9 bREI.exe 2 4 2->9         started        13 test.exe 2->13         started        15 test.exe 2->15         started        17 test.exe 2->17         started        signatures3 process4 file5 38 C:\Users\user\AppData\Local\Temp\...\test.exe, PE32 9->38 dropped 70 Contains functionality to bypass UAC (CMSTPLUA) 9->70 72 Contains functionalty to change the wallpaper 9->72 74 Creates autostart registry keys with suspicious names 9->74 76 5 other signatures 9->76 19 test.exe 3 2 9->19         started        23 cmd.exe 1 9->23         started        signatures6 process7 dnsIp8 42 0.tcp.sa.ngrok.io 18.228.115.60, 16400, 49708, 49712 AMAZON-02US United States 19->42 44 18.229.146.63, 16400, 49739, 49740 AMAZON-02US United States 19->44 46 2 other IPs or domains 19->46 56 Antivirus detection for dropped file 19->56 58 Multi AV Scanner detection for dropped file 19->58 60 Contains functionality to bypass UAC (CMSTPLUA) 19->60 64 6 other signatures 19->64 25 cmd.exe 1 19->25         started        28 conhost.exe 19->28         started        62 Uses cmd line tools excessively to alter registry or file data 23->62 30 reg.exe 1 23->30         started        32 conhost.exe 23->32         started        signatures9 process10 signatures11 66 Uses cmd line tools excessively to alter registry or file data 25->66 34 conhost.exe 25->34         started        36 reg.exe 1 25->36         started        68 Disables UAC (registry) 30->68 process12
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7/
Threat name:
Win32.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2023-11-20 05:08:04 UTC
File Type:
PE (Exe)
Extracted files:
17
AV detection:
33 of 37 (89.19%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xcjzh53wqcw66zyxawdn37j3owljjmqk7spxd3kdr4igdnb2d6tq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost (em ingl�s) evasion persistence rat trojan upx
Link:
https://tria.ge/reports/231120-fsjvbsdh95/
Behaviour
Modifies registry key
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
UPX packed file
Remcos
UAC bypass
Malware Config
C2 Extraction:
0.tcp.sa.ngrok.io:16400
Unpacked files
SH256 hash:
138dee7c642142f3b54f73be3fe62010f32bc3207ca673aea4a651db09907aa0
MD5 hash:
30e5854084146250a4efc2d97ccc42fb
SHA1 hash:
90d73f5a2c0fb82a433eebe2994c524b51068704
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/86d759d9-d8df-4bda-9015-fadb7cfaab08/
SH256 hash:
b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7
MD5 hash:
e75f765cc60c22c945c2c4f2916ae873
SHA1 hash:
24dee8ac5b363434ee482b14ad6a6d0e3d3ad312
Link:
https://www.unpac.me/results/86d759d9-d8df-4bda-9015-fadb7cfaab08/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b89393f77680/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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

File information

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

Web download

RemcosRAT

Executable exe b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7

(this sample)

  
Link
https://www.virustotal.com/gui/file/b89393f77680adef67170586ddfd3b759694b20afc9f71ed438f1061b43a1fa7/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/459200/

Comments