MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d21f7c6f8a4fbbb00973d1ed40f4c9ca33920aaca079b70ff298db4e74b56134. 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 YARA 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d21f7c6f8a4fbbb00973d1ed40f4c9ca33920aaca079b70ff298db4e74b56134
SHA3-384 hash: abb764f8819ee73961fb603e9e00afd6245c94e9d95d0dbe14b4e38a1fbc08c7727c886be891bd7f797108da062ceb4f
SHA1 hash: a623506eaf869aa3a844e0276851ad66ded5bce9
MD5 hash: c3b009c9cd3e59ead22d497462a1dad1
humanhash: bacon-washington-iowa-johnny
File name:cost.bin
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'437'696 bytes
First seen:2021-02-01 21:09:30 UTC
Last seen:2021-02-01 22:57:05 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 12288:qME3nAUtOVeGY5mcs4QZGCIbK0Yqs8wRmp7OJxvBd3676:qt3JtgY5K7Gq0lUJxBd3
Threatray 288 similar samples on MalwareBazaar
TLSH 4C659951A3F88B4DDAB5F33756EA22180392FCEB76609B43675A177210D31D17B0EB88
Reporter j_dubp
Tags:remcos RemcosRAT


Avatar
j_dubp
Dropbox link delivered via email hosting Cost.rar with Cost.exe inside (Remcos)

Intelligence

File Origin
# of uploads :
2
# of downloads :
185
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
cost.bin
Verdict:
Malicious activity
Analysis date:
2021-02-01 21:05:30 UTC
Tags:
rat remcos keylogger
Link:
https://app.any.run/tasks/7ebba6aa-4b5e-438a-b8c2-410c35541bad

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/115042/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Running batch commands
Launching a process
Creating a file in the %temp% directory
Creating a file
Creating a process from a recently created file
Sending a UDP request
DNS request
Creating a file in the %AppData% subdirectories
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
Setting a global event handler for the keyboard
Connection attempt to an infection source
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.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/595944
Signature
Allocates memory in foreign processes
Binary contains a suspicious time stamp
Detected Remcos RAT
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 347011 Sample: cost.bin Startdate: 01/02/2021 Architecture: WINDOWS Score: 100 46 Malicious sample detected (through community Yara rule) 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 Detected Remcos RAT 2->50 52 2 other signatures 2->52 7 cost.exe 6 2->7         started        11 cost.exe 1 2->11         started        13 cost.exe 2->13         started        process3 file4 42 C:\Users\user\AppData\Local\Temp\Cost.exe, PE32 7->42 dropped 44 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 7->44 dropped 54 Writes to foreign memory regions 7->54 56 Allocates memory in foreign processes 7->56 58 Hides that the sample has been downloaded from the Internet (zone.identifier) 7->58 60 Injects a PE file into a foreign processes 7->60 15 Cost.exe 1 7->15         started        18 cmd.exe 1 7->18         started        20 cmd.exe 1 7->20         started        22 8 other processes 7->22 signatures5 process6 signatures7 62 Multi AV Scanner detection for dropped file 15->62 24 Cost.exe 15->24         started        26 conhost.exe 18->26         started        28 reg.exe 1 1 18->28         started        30 conhost.exe 20->30         started        32 reg.exe 1 20->32         started        34 WerFault.exe 23 9 22->34         started        36 Cost.exe 22->36         started        38 Cost.exe 22->38         started        40 4 other processes 22->40 process8
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/d21f7c6f8a4fbbb00973d1ed40f4c9ca33920aaca079b70ff298db4e74b56134/
Threat name:
Win32.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2021-02-01 21:10:07 UTC
AV detection:
13 of 46 (28.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2ipxy34kj653aclt2hwub5gjzizzecvmub43od7stdnu45fvme2a._file
Verdict:
suspicious
Similar samples:
101bfb7953ee39065a917a37670cc43836cf5c0a938082f4038515efebddcc04
RemcosRAT
2f01970525500ba9024c7d2578ed317c6c8d51a482c15cf50506c862e9d18c35
RemcosRAT
48a21c645f143a4fcfc517da6517f08c8063e46cfd5ee4278a5ad2600818ba8a
RemcosRAT
55ca4147c94a10c9fc3fe95d3e922546ee796f63ca3b9aad005998f1e1e2b912
RemcosRAT
84d9c4b6e6175152b0a96f6d629372d0e0f6709609373e0ccb0679b6b854b4e8
RemcosRAT
8bb5e094fe793a06740ea5ab43ced903c8be03b623bf604fd10b704941d503b2
RemcosRAT
8fde2bd043c16448fe13d733e35e388de4a95938f187682f60725d27da3653c8
RemcosRAT
96cdf96daea9002d2dcf31e5d37b7df4942ef6085209df1f6b269b9baca3e40a
RemcosRAT
b3e06e10d739a4e4c6207dba909e57c264994c09543a5101fe52da860e8a09a9
RemcosRAT
c549da8e701e70f541c7a4a651406aec910cda2587392f33d1ee0d5717439d99
RemcosRAT
+ 278 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence ransomware rat
Link:
https://tria.ge/reports/210201-anqhnf7svs/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
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:
afrog.sytes.net:10013
Unpacked files
SH256 hash:
2256b20d8b530fc920f5ba82263a1e38dd268ca3a8fc2ed949f9fc4ba5f3fa41
MD5 hash:
595b3d9aed03cdf10448a9cb313a8833
SHA1 hash:
88710b7abb451efaa9876081a7af6cb98cdf33bb
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/60d4a565-f2e8-40ce-a5ac-d4c4b3404836/
SH256 hash:
e2b5646e959fcf2f6ed994780262e65c16cecbc9d3421ada3239f26130ebe8d1
MD5 hash:
7a13d5b7628956f87cb4f24b3e66ff5d
SHA1 hash:
5a2a3e4a70a7ef67180b6dea2273c9c3ae162f9c
Link:
https://www.unpac.me/results/60d4a565-f2e8-40ce-a5ac-d4c4b3404836/
SH256 hash:
c06d4e3d0205d9bdd4a4b40b8da710d698b3a5d73a1626c9ca058c10b2c6d00c
MD5 hash:
7f67414b3fd29299f2d29ad7c2afb995
SHA1 hash:
2ec40d57c08c47433a6d044d271d74005dddae8d
Link:
https://www.unpac.me/results/60d4a565-f2e8-40ce-a5ac-d4c4b3404836/
SH256 hash:
a60900adc31e8e28ff541b91a55de5d9719c0d1ddc3022eb6f6fb5ac19cc9e4f
MD5 hash:
831fb0609b3509b4fb31ac662ac69217
SHA1 hash:
985c33fa2b01e305995e2ea166b961b01f0f6335
Link:
https://www.unpac.me/results/60d4a565-f2e8-40ce-a5ac-d4c4b3404836/
SH256 hash:
2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad
MD5 hash:
0e362e7005823d0bec3719b902ed6d62
SHA1 hash:
590d860b909804349e0cdc2f1662b37bd62f7463
Link:
https://www.unpac.me/results/60d4a565-f2e8-40ce-a5ac-d4c4b3404836/
SH256 hash:
4f81e273da20c5b9835ce6ca57cc061d77764f9e3927bdb1505cb791bf50b046
MD5 hash:
29e19b5dce96140a8b90152b16bd44af
SHA1 hash:
4f3dc6eb876bb58f53966980a9c451a04ec17d8a
Link:
https://www.unpac.me/results/60d4a565-f2e8-40ce-a5ac-d4c4b3404836/
SH256 hash:
d21f7c6f8a4fbbb00973d1ed40f4c9ca33920aaca079b70ff298db4e74b56134
MD5 hash:
c3b009c9cd3e59ead22d497462a1dad1
SHA1 hash:
a623506eaf869aa3a844e0276851ad66ded5bce9
Link:
https://www.unpac.me/results/60d4a565-f2e8-40ce-a5ac-d4c4b3404836/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/d21f7c6f8a4fbbb00973d1ed40f4c9ca33920aaca079b70ff298db4e74b56134

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
Rule name:win_remcos_g0
Create hunting rule
Author:Daniel Plohmann <daniel.plohmann<at>fkie.fraunhofer.de>

File information

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

anyrun
any.run
https://app.any.run/tasks/7ebba6aa-4b5e-438a-b8c2-410c35541bad
  
Delivery method
Distributed via e-mail link
Cape
Cape
https://www.capesandbox.com/analysis/115042/

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