Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
04/11/2022, 13:31
General
- Target file.exe
- Size 291KB
- Sample221104-qsc2wshfbl
- SHA256 cf6b68cfff2e355702a5fd45740034313a898ebf096868aa75048ea773316785
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\D844.exeC:\Users\Admin\AppData\Local\Temp\D844.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2616 -s 12602⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\DAD5.exeC:\Users\Admin\AppData\Local\Temp\DAD5.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\DCE9.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\DCE9.dll2⤵
- Loads dropped DLL
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C:\Users\Admin\AppData\Local\Temp\DEBF.exeC:\Users\Admin\AppData\Local\Temp\DEBF.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\DEBF.exeC:\Users\Admin\AppData\Local\Temp\DEBF.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\7551c7f4-55bb-4539-9a01-e75aa0701798" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\DEBF.exe"C:\Users\Admin\AppData\Local\Temp\DEBF.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\DEBF.exe"C:\Users\Admin\AppData\Local\Temp\DEBF.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\59983be4-6edc-4495-8b7d-d1f5d564c07c\build2.exe"C:\Users\Admin\AppData\Local\59983be4-6edc-4495-8b7d-d1f5d564c07c\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\59983be4-6edc-4495-8b7d-d1f5d564c07c\build2.exe"C:\Users\Admin\AppData\Local\59983be4-6edc-4495-8b7d-d1f5d564c07c\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\59983be4-6edc-4495-8b7d-d1f5d564c07c\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\59983be4-6edc-4495-8b7d-d1f5d564c07c\build3.exe"C:\Users\Admin\AppData\Local\59983be4-6edc-4495-8b7d-d1f5d564c07c\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 404 -p 2616 -ip 26161⤵
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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
DEBF.exe
D844.exe
D844.exe
DAD5.exe
DAD5.exe
DCE9.dll
DCE9.dll
DCE9.dll
DEBF.exe
DEBF.exe
DEBF.exe
DEBF.exe
DEBF.exe
mstsca.exe
mstsca.exe
memory/316-170-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/316-182-0x0000000002C70000-0x0000000002C79000-memory.dmp
memory/316-188-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/316-181-0x0000000002D09000-0x0000000002D1F000-memory.dmp
memory/1008-177-0x0000000002EFC000-0x0000000002F8E000-memory.dmp
memory/1008-179-0x00000000049A0000-0x0000000004ABB000-memory.dmp
memory/2240-166-0x0000000002750000-0x0000000002870000-memory.dmp
memory/2240-167-0x0000000002940000-0x00000000029F5000-memory.dmp
memory/2240-168-0x0000000002940000-0x00000000029F5000-memory.dmp
memory/2240-164-0x0000000002870000-0x0000000002939000-memory.dmp
memory/2240-150-0x0000000000C50000-0x0000000000DBE000-memory.dmp
memory/2240-171-0x0000000002510000-0x0000000002630000-memory.dmp
memory/2616-158-0x0000000004780000-0x00000000047BE000-memory.dmp
memory/2616-154-0x0000000004F60000-0x0000000004FF2000-memory.dmp
memory/2616-223-0x0000000000400000-0x0000000002C53000-memory.dmp
memory/2616-222-0x0000000002DF9000-0x0000000002E2A000-memory.dmp
memory/2616-218-0x0000000008FA0000-0x00000000094CC000-memory.dmp
memory/2616-217-0x0000000008DD0000-0x0000000008F92000-memory.dmp
memory/2616-163-0x0000000007400000-0x000000000743C000-memory.dmp
memory/2616-165-0x0000000000400000-0x0000000002C53000-memory.dmp
memory/2616-152-0x00000000074A0000-0x0000000007A44000-memory.dmp
memory/2616-157-0x0000000002DF9000-0x0000000002E2A000-memory.dmp
memory/2616-201-0x0000000002DF9000-0x0000000002E2A000-memory.dmp
memory/2616-162-0x00000000073E0000-0x00000000073F2000-memory.dmp
memory/2616-199-0x00000000083F0000-0x0000000008456000-memory.dmp
memory/2616-161-0x0000000008180000-0x000000000828A000-memory.dmp
memory/2616-159-0x0000000007B60000-0x0000000008178000-memory.dmp
memory/2864-206-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2864-226-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2864-209-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2864-212-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2864-210-0x0000000000400000-0x000000000046E000-memory.dmp
memory/3512-194-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3512-224-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3512-200-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3512-192-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3572-178-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3572-176-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3572-180-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3572-174-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3572-187-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3676-193-0x0000000004786000-0x0000000004818000-memory.dmp
memory/3812-211-0x0000000000730000-0x0000000000789000-memory.dmp
memory/3812-208-0x0000000000648000-0x0000000000675000-memory.dmp
memory/4004-135-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/4004-132-0x0000000002EE9000-0x0000000002EFF000-memory.dmp
memory/4004-133-0x0000000002E90000-0x0000000002E99000-memory.dmp
memory/4004-134-0x0000000000400000-0x0000000002C37000-memory.dmp
memory/4504-160-0x00000000010F0000-0x00000000010FC000-memory.dmp
memory/4880-156-0x0000000000B30000-0x0000000000B9B000-memory.dmp
memory/4880-172-0x0000000000B30000-0x0000000000B9B000-memory.dmp
memory/4880-153-0x0000000000BA0000-0x0000000000C15000-memory.dmp