Analysis
- max time kernel
102s - max time network
142s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
23/04/2022, 12:33
General
- Target 59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe
- Size 726KB
- Sample220423-prmz2agedk
- SHA256 59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9
Malware Config
Extracted
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djvu
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http://fuyt.org/test1/get.php
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extension
.msjd
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offline_id
Xe4NOamOTHZrARTiL9dfVzAylFrEWLGGbr2dngt1
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payload_url
http://zerit.top/dl/build2.exe
http://fuyt.org/files/1/build3.exe
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ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-FT7BNVbXC9 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0455JIjdm
Extracted
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vidar
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51.8
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517
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https://t.me/mm20220428
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https://koyu.space/@ronxik123
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profile_id
517
Signatures
- Detected Djvu ransomware 8 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
- Vidar Stealer 5 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 2 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 2 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses 2FA software files, possible credential harvesting 2 TTPs
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies system certificate store 2 TTPs 2 IoCs
- Suspicious behavior: EnumeratesProcesses 12 IoCs
- Suspicious use of WriteProcessMemory 37 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe"C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe"C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\8937023a-8b3f-459d-b4ae-1dc9de12b7d3" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe"C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe"C:\Users\Admin\AppData\Local\Temp\59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\6a29cc2a-5fbb-41ee-8f02-d4aae08e2dfc\build2.exe"C:\Users\Admin\AppData\Local\6a29cc2a-5fbb-41ee-8f02-d4aae08e2dfc\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\6a29cc2a-5fbb-41ee-8f02-d4aae08e2dfc\build2.exe"C:\Users\Admin\AppData\Local\6a29cc2a-5fbb-41ee-8f02-d4aae08e2dfc\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build2.exe
59b0bd44e688d944e18c26e4210b219646c6e344a697afc53b7ed7a2a0cd40d9.exe
memory/1204-158-0x0000000000730000-0x0000000000779000-memory.dmp
memory/1204-156-0x00000000007A8000-0x00000000007D3000-memory.dmp
memory/2036-157-0x0000000000400000-0x000000000044C000-memory.dmp
memory/2036-154-0x0000000000400000-0x000000000044C000-memory.dmp
memory/2036-161-0x0000000060900000-0x0000000060992000-memory.dmp
memory/2036-159-0x0000000000400000-0x000000000044C000-memory.dmp
memory/2036-160-0x0000000000400000-0x000000000044C000-memory.dmp
memory/3516-132-0x0000000000983000-0x0000000000A14000-memory.dmp
memory/3516-134-0x0000000002240000-0x000000000235B000-memory.dmp
memory/3588-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3588-144-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3588-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3640-143-0x0000000000849000-0x00000000008DA000-memory.dmp
memory/4272-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4272-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4272-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4272-131-0x0000000000400000-0x0000000000537000-memory.dmp