Analysis
- max time kernel
151s - max time network
139s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
04/11/2022, 11:32
General
- Target file.exe
- Size 292KB
- Sample221104-nnapvsggdk
- SHA256 a2e17967ecd903cd84484aa897d4efeaac03246188957210da5b00de8d5a6550
Malware Config
Extracted
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djvu
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http://fresherlights.com/lancer/get.php
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extension
.bozq
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offline_id
oHp5e4SJxdFtxfvKYmeX06F4C5cn0EcsF5Ak9Wt1
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payload_url
http://uaery.top/dl/build2.exe
http://fresherlights.com/files/1/build3.exe
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ransomnote
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Signatures
- Detected Djvu ransomware 10 IoCs
- Detects Smokeloader packer 2 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- Executes dropped EXE 10 IoCs
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 5 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 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Checks SCSI registry key(s) 3 TTPs 6 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.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 6 IoCs
- Suspicious use of AdjustPrivilegeToken 17 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⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\EC97.exeC:\Users\Admin\AppData\Local\Temp\EC97.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4816 -s 17042⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\EE3E.exeC:\Users\Admin\AppData\Local\Temp\EE3E.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\F0EE.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\F0EE.dll2⤵
- Loads dropped DLL
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C:\Users\Admin\AppData\Local\Temp\F266.exeC:\Users\Admin\AppData\Local\Temp\F266.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\F266.exeC:\Users\Admin\AppData\Local\Temp\F266.exe2⤵
- 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\ace12289-fd88-472a-8294-7578cf71ee5f" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\F266.exe"C:\Users\Admin\AppData\Local\Temp\F266.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\F266.exe"C:\Users\Admin\AppData\Local\Temp\F266.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\235c2187-4ab6-46e8-959f-ad63e33a6362\build2.exe"C:\Users\Admin\AppData\Local\235c2187-4ab6-46e8-959f-ad63e33a6362\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\235c2187-4ab6-46e8-959f-ad63e33a6362\build2.exe"C:\Users\Admin\AppData\Local\235c2187-4ab6-46e8-959f-ad63e33a6362\build2.exe"6⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\235c2187-4ab6-46e8-959f-ad63e33a6362\build2.exe" & exit7⤵
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Local\235c2187-4ab6-46e8-959f-ad63e33a6362\build3.exe"C:\Users\Admin\AppData\Local\235c2187-4ab6-46e8-959f-ad63e33a6362\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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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⤵
- Creates scheduled task(s)
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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:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4816 -ip 48161⤵
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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⤵
- 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
sqlite3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
EC97.exe
EC97.exe
EE3E.exe
EE3E.exe
F0EE.dll
F0EE.dll
F0EE.dll
F266.exe
F266.exe
F266.exe
F266.exe
F266.exe
F266.exe
mstsca.exe
mstsca.exe
memory/1084-215-0x0000000000720000-0x0000000000779000-memory.dmp
memory/1084-214-0x00000000007A8000-0x00000000007D5000-memory.dmp
memory/1396-226-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1396-202-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1396-195-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1396-196-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1508-167-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/1508-177-0x0000000002C40000-0x0000000002D40000-memory.dmp
memory/1508-162-0x00000000046F0000-0x00000000046F9000-memory.dmp
memory/1508-188-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/2040-157-0x00000000024C0000-0x00000000025E0000-memory.dmp
memory/2040-158-0x0000000002700000-0x0000000002820000-memory.dmp
memory/2040-178-0x00000000028F0000-0x00000000029A5000-memory.dmp
memory/2040-183-0x0000000002700000-0x0000000002820000-memory.dmp
memory/2040-176-0x00000000028F0000-0x00000000029A5000-memory.dmp
memory/2040-166-0x0000000002820000-0x00000000028E9000-memory.dmp
memory/2040-152-0x0000000002350000-0x00000000024BE000-memory.dmp
memory/2224-133-0x0000000002D80000-0x0000000002D89000-memory.dmp
memory/2224-134-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/2224-135-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/2224-132-0x0000000002F89000-0x0000000002F9F000-memory.dmp
memory/3816-197-0x00000000047F3000-0x0000000004885000-memory.dmp
memory/3904-210-0x0000000000400000-0x000000000046E000-memory.dmp
memory/3904-212-0x0000000000400000-0x000000000046E000-memory.dmp
memory/3904-216-0x0000000000400000-0x000000000046E000-memory.dmp
memory/3904-213-0x0000000000400000-0x000000000046E000-memory.dmp
memory/3904-228-0x0000000000400000-0x000000000046E000-memory.dmp
memory/4172-169-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4172-171-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4172-180-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4172-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4172-173-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4480-164-0x00000000012E0000-0x000000000134B000-memory.dmp
memory/4480-155-0x0000000001350000-0x00000000013C5000-memory.dmp
memory/4480-156-0x00000000012E0000-0x000000000134B000-memory.dmp
memory/4780-154-0x00000000001A0000-0x00000000001AC000-memory.dmp
memory/4816-191-0x00000000083F0000-0x0000000008456000-memory.dmp
memory/4816-163-0x00000000076B0000-0x0000000007C54000-memory.dmp
memory/4816-160-0x0000000002DD0000-0x0000000002E0E000-memory.dmp
memory/4816-205-0x0000000009180000-0x00000000096AC000-memory.dmp
memory/4816-204-0x0000000008FB0000-0x0000000009172000-memory.dmp
memory/4816-203-0x0000000002E89000-0x0000000002EBA000-memory.dmp
memory/4816-161-0x0000000000400000-0x0000000002C53000-memory.dmp
memory/4816-221-0x0000000000400000-0x0000000002C53000-memory.dmp
memory/4816-222-0x0000000002E89000-0x0000000002EBA000-memory.dmp
memory/4816-159-0x0000000002E89000-0x0000000002EBA000-memory.dmp
memory/4816-179-0x0000000008280000-0x000000000838A000-memory.dmp
memory/4816-165-0x0000000004ED0000-0x0000000004F62000-memory.dmp
memory/4816-182-0x0000000005090000-0x00000000050A2000-memory.dmp
memory/4816-184-0x00000000050B0000-0x00000000050EC000-memory.dmp
memory/4816-175-0x0000000007C60000-0x0000000008278000-memory.dmp
memory/4984-174-0x0000000004A30000-0x0000000004B4B000-memory.dmp
memory/4984-172-0x000000000489C000-0x000000000492E000-memory.dmp