Analysis
- max time kernel
152s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
02/10/2022, 00:31
General
- Target file.exe
- Size 147KB
- Sample221002-at25eafaem
- SHA256 3c70df4e698a36706d7272b573513ba964a861bb79f20c4e2aac95b29028f021
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
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extension
.ofww
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offline_id
xkNzhkB1wvgoDI7Uo0HPNLY3qCuwoFpP7nlhlut1
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payload_url
http://rgyui.top/dl/build2.exe
http://winnlinne.com/files/1/build3.exe
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ransomnote
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Extracted
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raccoon
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1a17d9aed7a239440deb75d7a177f406
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http://193.38.55.180/
Extracted
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vidar
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54.7
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517
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https://t.me/trampapanam
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https://nerdculture.de/@yoxhyp
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profile_id
517
Signatures
- DcRat 4 IoCs
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
- Detected Djvu ransomware 10 IoCs
- Detects Smokeloader packer 1 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Raccoon
Raccoon is an infostealer written in C++ and first seen in 2019.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 10 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 6 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 Microsoft Outlook profiles 1 TTPs 3 IoCs
- 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 4 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 5 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of WriteProcessMemory 64 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- DcRat
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\66C8.exeC:\Users\Admin\AppData\Local\Temp\66C8.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\66C8.exeC:\Users\Admin\AppData\Local\Temp\66C8.exe2⤵
- DcRat
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\ec38d56b-3923-4837-be19-ba3733b00c77" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\66C8.exe"C:\Users\Admin\AppData\Local\Temp\66C8.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\66C8.exe"C:\Users\Admin\AppData\Local\Temp\66C8.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
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C:\Users\Admin\AppData\Local\b7ef49a3-f739-4dbc-81c3-e7e7ce8a51b4\build2.exe"C:\Users\Admin\AppData\Local\b7ef49a3-f739-4dbc-81c3-e7e7ce8a51b4\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Users\Admin\AppData\Local\b7ef49a3-f739-4dbc-81c3-e7e7ce8a51b4\build2.exe"C:\Users\Admin\AppData\Local\b7ef49a3-f739-4dbc-81c3-e7e7ce8a51b4\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
-
-
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C:\Users\Admin\AppData\Local\b7ef49a3-f739-4dbc-81c3-e7e7ce8a51b4\build3.exe"C:\Users\Admin\AppData\Local\b7ef49a3-f739-4dbc-81c3-e7e7ce8a51b4\build3.exe"5⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- DcRat
- Creates scheduled task(s)
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-
-
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C:\Users\Admin\AppData\Local\Temp\6A73.exeC:\Users\Admin\AppData\Local\Temp\6A73.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"2⤵
- Loads dropped DLL
-
-
C:\Users\Admin\AppData\Local\Temp\7292.exeC:\Users\Admin\AppData\Local\Temp\7292.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.execmd /C "wmic path win32_VideoController get name"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic path win32_VideoController get name3⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.execmd /C "wmic cpu get name"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic cpu get name3⤵
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\76D9.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\76D9.dll2⤵
- Loads dropped DLL
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
- Accesses Microsoft Outlook profiles
- outlook_office_path
- outlook_win_path
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"2⤵
- DcRat
- Creates scheduled task(s)
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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
mozglue.dll
nss3.dll
sqlite3.dll
66C8.exe
66C8.exe
66C8.exe
66C8.exe
66C8.exe
6A73.exe
6A73.exe
7292.exe
7292.exe
76D9.dll
76D9.dll
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
66C8.exe
mstsca.exe
mstsca.exe
memory/2040-134-0x0000000000400000-0x0000000000582000-memory.dmp
memory/2040-136-0x0000000000400000-0x0000000000582000-memory.dmp
memory/2040-133-0x0000000000600000-0x0000000000609000-memory.dmp
memory/2040-135-0x000000000081D000-0x000000000082D000-memory.dmp
memory/2040-132-0x000000000081D000-0x000000000082D000-memory.dmp
memory/2436-157-0x0000000002210000-0x000000000232B000-memory.dmp
memory/2436-156-0x00000000020E2000-0x0000000002174000-memory.dmp
memory/2620-217-0x00000000004D0000-0x00000000004F9000-memory.dmp
memory/2620-218-0x0000000000900000-0x0000000000947000-memory.dmp
memory/4536-239-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4536-205-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4536-198-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4536-199-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4596-242-0x0000000000400000-0x000000000045B000-memory.dmp
memory/4596-220-0x0000000000400000-0x000000000045B000-memory.dmp
memory/4596-221-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4596-219-0x0000000000400000-0x000000000045B000-memory.dmp
memory/4596-216-0x0000000000400000-0x000000000045B000-memory.dmp
memory/4596-214-0x0000000000400000-0x000000000045B000-memory.dmp
memory/34608-155-0x0000000000750000-0x00000000007BB000-memory.dmp
memory/34608-174-0x0000000000750000-0x00000000007BB000-memory.dmp
memory/34608-154-0x0000000000A00000-0x0000000000A75000-memory.dmp
memory/52064-179-0x0000000003020000-0x000000000312E000-memory.dmp
memory/52064-178-0x0000000002DF0000-0x0000000002F03000-memory.dmp
memory/52064-184-0x0000000003140000-0x0000000003204000-memory.dmp
memory/52064-193-0x0000000003020000-0x000000000312E000-memory.dmp
memory/52064-190-0x0000000003220000-0x00000000032CE000-memory.dmp
memory/61596-151-0x0000000000D60000-0x0000000000D67000-memory.dmp
memory/61596-152-0x0000000000D50000-0x0000000000D5C000-memory.dmp
memory/90052-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/90052-162-0x0000000000400000-0x0000000000537000-memory.dmp
memory/90052-159-0x0000000000400000-0x0000000000537000-memory.dmp
memory/90052-161-0x0000000000400000-0x0000000000537000-memory.dmp
memory/90052-163-0x0000000000400000-0x0000000000537000-memory.dmp
memory/100876-172-0x0000000000400000-0x0000000000414000-memory.dmp
memory/100876-165-0x0000000000400000-0x0000000000414000-memory.dmp
memory/101272-197-0x0000000002043000-0x00000000020D5000-memory.dmp