MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 838f1f8a9c9f2f679ffe88342be97a29234ce18ce6a42329ec6afb79a5d51e6b. 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: 10


Intelligence 10 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 838f1f8a9c9f2f679ffe88342be97a29234ce18ce6a42329ec6afb79a5d51e6b
SHA3-384 hash: 98d5573919e2a6e397823569d1b10f9f3b9b5cc99ba21ef6e1e6477b0ebbb7c1293aae88265799bc391744c24b69db62
SHA1 hash: ebfd6c4bc8fa137cc3efa7eda958fbb8fad48557
MD5 hash: 97eaa75cb6f3850eb31b6b7d85797c43
humanhash: spring-four-florida-alabama
File name:97eaa75cb6f3850eb31b6b7d85797c43.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'300'232 bytes
First seen:2022-08-29 08:01:28 UTC
Last seen:2022-08-29 08:49:11 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'476 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 49152:jz1Pke+DRn5G7VPvS9L+UF3VrqaxKIUtTs5:PlQNno789CUFFOaxKztw
TLSH T147B533775A69147CD39538F8A451244B8E7BE2668D20AB672037EB0177A9B8C0DD33CF
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
Reporter abuse_ch
Tags:exe RAT RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
290
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/302094/
Detection(s):
SecuriteInfo.com.Trojan.KillProc2.18425.3461.27548.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Using the Windows Management Instrumentation requests
Launching a process
Creating a file
Сreating synchronization primitives
Creating a window
Creating a file in the %temp% subdirectories
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Creating a process from a recently created file
Running batch commands
Creating a process with a hidden window
Creating a file in the %AppData% subdirectories
Creating a file in the %AppData% directory
Connecting to a cryptocurrency mining pool
Creating a service
Launching a service
Loading a system driver
Creating a file in the Windows subdirectories
Sending an HTTP POST request
Unauthorized injection to a recently created process
Enabling autorun for a service
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
overlay packed
Link:
https://www.filescan.io/uploads/630c72c2e1fbecb8988114fb/reports/6d53886a-732f-4278-96f4-c9c5dc585b5d/overview
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/4d848f6f-cebc-4f9a-9a4d-e1d424188145
Result
Threat name:
AsyncRAT, PrivateLoader, Remcos, Xmrig
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1059693
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Changes security center settings (notifications, updates, antivirus, firewall)
Connects to many ports of the same IP (likely port scanning)
Detected Stratum mining protocol
Found hidden mapped module (file has been removed from disk)
Found strings related to Crypto-Mining
Installs a global keyboard hook
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
Modifies power options to not sleep / hibernate
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Query firmware table information (likely to detect VMs)
Sample is not signed and drops a device driver
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses powercfg.exe to modify the power settings
Writes many files with high entropy
Writes to foreign memory regions
Yara detected AsyncRAT
Yara detected Generic Downloader
Yara detected PrivateLoader
Yara detected Remcos RAT
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 692215 Sample: R0N6sOUH2v.exe Startdate: 29/08/2022 Architecture: WINDOWS Score: 100 72 Snort IDS alert for network traffic 2->72 74 Multi AV Scanner detection for domain / URL 2->74 76 Malicious sample detected (through community Yara rule) 2->76 78 18 other signatures 2->78 8 R0N6sOUH2v.exe 3 2->8         started        12 svchost.exe 2->12         started        14 svchost.exe 1 2->14         started        16 7 other processes 2->16 process3 dnsIp4 58 C:\Users\user\AppData\...\R0N6sOUH2v.exe.log, ASCII 8->58 dropped 100 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 8->100 19 InstallUtil.exe 2 73 8->19         started        102 Changes security center settings (notifications, updates, antivirus, firewall) 12->102 24 MpCmdRun.exe 1 12->24         started        104 System process connects to network (likely due to code injection or exploit) 14->104 60 127.0.0.1 unknown unknown 16->60 26 conhost.exe 16->26         started        28 powercfg.exe 1 16->28         started        30 powercfg.exe 1 16->30         started        32 2 other processes 16->32 file5 signatures6 process7 dnsIp8 62 cothdesigns.com 37.139.129.221, 3456, 443, 49731 LVLT-10753US Germany 19->62 64 geoplugin.net 178.237.33.50, 49733, 80 ATOM86-ASATOM86NL Netherlands 19->64 50 C:\Users\user\AppData\Local\...\jjxpiezf.exe, PE32+ 19->50 dropped 52 C:\Users\user\...\time_20220831_174255.dat, data 19->52 dropped 54 C:\Users\user\...\time_20220831_164254.dat, data 19->54 dropped 56 53 other malicious files 19->56 dropped 88 Writes many files with high entropy 19->88 90 Installs a global keyboard hook 19->90 34 jjxpiezf.exe 7 19->34         started        38 conhost.exe 24->38         started        file9 signatures10 process11 file12 46 C:\Users\user\AppData\Roaming\...\WR64.sys, PE32+ 34->46 dropped 48 C:\Users\user\AppData\Roaming\DAC8.tmp, PE32+ 34->48 dropped 80 Antivirus detection for dropped file 34->80 82 Machine Learning detection for dropped file 34->82 84 Writes to foreign memory regions 34->84 86 4 other signatures 34->86 40 cmd.exe 1 34->40         started        43 svchost.exe 34->43         started        signatures13 process14 dnsIp15 92 Uses powercfg.exe to modify the power settings 40->92 94 Modifies power options to not sleep / hibernate 40->94 66 xmr.2miners.com 51.89.96.41, 2222, 49749 OVHFR France 43->66 68 cothdesigns.com 43->68 70 192.168.2.1 unknown unknown 43->70 96 Query firmware table information (likely to detect VMs) 43->96 signatures16 98 Detected Stratum mining protocol 66->98
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/838f1f8a9c9f2f679ffe88342be97a29234ce18ce6a42329ec6afb79a5d51e6b/
Threat name:
ByteCode-MSIL.Downloader.Seraph
Create hunting rule
Status:
Malicious
First seen:
2022-08-29 08:02:15 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
12 of 26 (46.15%)
Threat level:
  3/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qohr7cu4t4xwph76ra2cx2l2feruzymm42scgkpmnl5xtjovdzvq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:220829 rat
Link:
https://tria.ge/reports/220829-jw468aeacl/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Remcos
Malware Config
C2 Extraction:
cothdesigns.com:3456
Unpacked files
SH256 hash:
bf1334443548d3ef7d357912549b75534b839008aaf877e5d7614b3d9fd65ba4
MD5 hash:
d01bd200f061efb77372c94ed639c3ab
SHA1 hash:
2f516e73f8f88382377694709e9e0b25ce7676cd
Link:
https://www.unpac.me/results/8ad38252-63b3-46c8-b742-312361f622b0/
SH256 hash:
838f1f8a9c9f2f679ffe88342be97a29234ce18ce6a42329ec6afb79a5d51e6b
MD5 hash:
97eaa75cb6f3850eb31b6b7d85797c43
SHA1 hash:
ebfd6c4bc8fa137cc3efa7eda958fbb8fad48557
Link:
https://www.unpac.me/results/8ad38252-63b3-46c8-b742-312361f622b0/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/838f1f8a9c9f2f679ffe88342be97a29234ce18ce6a42329ec6afb79a5d51e6b

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:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:pe_imphash
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.

File information

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

Web download

RemcosRAT

Executable exe 838f1f8a9c9f2f679ffe88342be97a29234ce18ce6a42329ec6afb79a5d51e6b

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2276782/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2276802/
Cape
Cape
https://www.capesandbox.com/analysis/302094/

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