MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef83d81d11a67e30b60aee43b96466b0c372d4db23fb1d1cafc8757b2393581b. 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: 11


Intelligence 11 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef83d81d11a67e30b60aee43b96466b0c372d4db23fb1d1cafc8757b2393581b
SHA3-384 hash: e19d664c587e455ef8e45770786d933430d7810a3df46cec3b75842426e76dbe0c515d50319858389c06bfa4e5fee383
SHA1 hash: d8c4a3d5d9392de64cd509e82a976e6aa08cb889
MD5 hash: 732ff39e0ac42fdb758e51fda77caf7c
humanhash: friend-bravo-island-nevada
File name:Acuerdo De Pago_08412577907_583208_498901018085408841199_01976928_03291424434610_210182491400482_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:954'672 bytes
First seen:2020-10-16 12:22:51 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:KPIN3r8VImCq4GXQUIkln7sJ8BcsBwD5UPcGqZ22ZWFaYsWpbnR:KPE3Q+oxPbln7sJ
Threatray 850 similar samples on MalwareBazaar
TLSH 4E15D83C5CC8263759BAE2BAC5F256C7FA51798335915C0F61DB53810E03BA72E8AC2D
Reporter abuse_ch
Tags:exe Outlook RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM02-CY1-obe.outbound.protection.outlook.com
Sending IP: 40.92.4.80
From: pedro paloma <molinosdeviento_@outlook.com>
Subject: COBRO JURIDICO SERFINANZA
Attachment: Acuerdo De Pago_08412577907_583208_498901018085408841199_01976928_03291424434610_210182491400482.tgz (contains "Acuerdo De Pago_08412577907_583208_498901018085408841199_01976928_03291424434610_210182491400482_pdf.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
81
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/71963/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Launching a process
Creating a process with a hidden window
Adding an access-denied ACE
Creating a file
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a window
Deleting a recently created file
Running batch commands
DNS request
Sending a custom TCP 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
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/493564
Signature
Contains functionality to capture and log keystrokes
Contains functionality to hide a thread from the debugger
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Country aware sample found (crashes after keyboard check)
Detected Remcos RAT
Hides threads from debuggers
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 299234 Sample: 0482_pdf.exe Startdate: 16/10/2020 Architecture: WINDOWS Score: 100 80 Malicious sample detected (through community Yara rule) 2->80 82 Detected Remcos RAT 2->82 84 Yara detected Remcos RAT 2->84 86 4 other signatures 2->86 11 0482_pdf.exe 2->11         started        14 PxoServicesNet.exe.exe 2->14         started        16 PxoServicesNet.exe.exe 2->16         started        process3 signatures4 88 Contains functionality to steal Chrome passwords or cookies 11->88 90 Contains functionality to capture and log keystrokes 11->90 92 Contains functionality to inject code into remote processes 11->92 98 2 other signatures 11->98 18 0482_pdf.exe 4 5 11->18         started        21 WerFault.exe 23 9 11->21         started        23 timeout.exe 1 11->23         started        94 Hides threads from debuggers 14->94 96 Injects a PE file into a foreign processes 14->96 25 timeout.exe 14->25         started        27 WerFault.exe 14->27         started        30 PxoServicesNet.exe.exe 14->30         started        32 PxoServicesNet.exe.exe 14->32         started        34 timeout.exe 16->34         started        36 2 other processes 16->36 process5 dnsIp6 64 C:\Users\user\...\PxoServicesNet.exe.exe, PE32 18->64 dropped 66 C:\...\PxoServicesNet.exe.exe:Zone.Identifier, ASCII 18->66 dropped 38 wscript.exe 1 18->38         started        68 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 21->68 dropped 40 conhost.exe 23->40         started        42 conhost.exe 25->42         started        72 192.168.2.1 unknown unknown 27->72 44 conhost.exe 34->44         started        file7 process8 process9 46 cmd.exe 1 38->46         started        process10 48 PxoServicesNet.exe.exe 46->48         started        51 conhost.exe 46->51         started        signatures11 74 Machine Learning detection for dropped file 48->74 76 Hides threads from debuggers 48->76 78 Injects a PE file into a foreign processes 48->78 53 PxoServicesNet.exe.exe 48->53         started        56 timeout.exe 1 48->56         started        58 PxoServicesNet.exe.exe 48->58         started        60 2 other processes 48->60 process12 dnsIp13 70 databasepropersonombrecomercialideasearchwords.services 186.169.41.142, 49752, 7580 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 53->70 62 conhost.exe 56->62         started        process14
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ef83d81d11a67e30b60aee43b96466b0c372d4db23fb1d1cafc8757b2393581b/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-10-16 05:31:33 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=56b5qhiruz7dbnqk5zb3szdgwdbxfvg3ep5r2hfpzb2xwi4tlanq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
15170d0dbe467efc4e38156ed4e03702ae19af44c100d7df7a75c6dbdb7ac587
RemcosRAT
1befcab4a8d97cea8592fa608814f038fd956a5f1f2ddfd9ee8b9402045a705a
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4875f3562c4af57ea7bd8f6eecfc297784d9307cd7190a6aa44a0dffc21258c9
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
6274c01dd6783517a68267d2c6c2af38143ed35074cfc2372d8bc385a7c5f4e9
RemcosRAT
6c882aeb918e424cefe1068a6d3fbff5526c31e185716bf3a0d5ae0295772f09
RemcosRAT
763d415415add2ffc6d482373e211c8c8b647ee46ade5e8dacce10f79d515e2b
RemcosRAT
a1c644a64801c61e1649517c3debc28b194b4f9d43e1a99bc28724f652c3ca5e
RemcosRAT
f412da03defe68cc6e1f264449adf519a4c5470c51e7b502854f7fbf358f8516
RemcosRAT
+ 840 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
persistence rat family:remcos
Link:
https://tria.ge/reports/201016-fryaywa1wn/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
ServiceHost packer
Remcos
Malware Config
C2 Extraction:
databasepropersonombrecomercialideasearchwords.services:7580
Unpacked files
SH256 hash:
ef83d81d11a67e30b60aee43b96466b0c372d4db23fb1d1cafc8757b2393581b
MD5 hash:
732ff39e0ac42fdb758e51fda77caf7c
SHA1 hash:
d8c4a3d5d9392de64cd509e82a976e6aa08cb889
Link:
https://www.unpac.me/results/20b267a5-a28d-43e2-82cd-b09c254501e7/
SH256 hash:
4489676c258bf98df25b6d4dcbb5db925a59cd9c77102de11bdb8567ff8debe3
MD5 hash:
b2959d8da79ef8d159ddf30ec0e40406
SHA1 hash:
6f3a593dd59cd68047f25c8d9b249cbda6d6ac80
Link:
https://www.unpac.me/results/20b267a5-a28d-43e2-82cd-b09c254501e7/
SH256 hash:
c346fa0d9babf4b637db136a0c7ce2963c751be29398cdac58f48d2a497d157a
MD5 hash:
a350af68ade4919af08f8ffaf51b4a8e
SHA1 hash:
51742da2fe79c441045f00a3940203a12f1dcbfc
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/20b267a5-a28d-43e2-82cd-b09c254501e7/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.96
Link:
https://yomi.yoroi.company/submissions/ef83d81d11a67e30b60aee43b96466b0c372d4db23fb1d1cafc8757b2393581b

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: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: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.

Malspam

RemcosRAT

rar 048730f83e459194bb327fbe22a255d5c19164b535cfc911c30bc207d1c97d36

RemcosRAT

Executable exe ef83d81d11a67e30b60aee43b96466b0c372d4db23fb1d1cafc8757b2393581b

(this sample)

  
Dropped by
MD5 8c4625301f60faf086c3942eeb6eb235
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/71963/
  
Dropped by
SHA256 048730f83e459194bb327fbe22a255d5c19164b535cfc911c30bc207d1c97d36

Comments