Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/10/2022, 04:32
General
- Target file.exe
- Size 272KB
- Sample221005-e5ynksdch9
- SHA256 81b92c041598d7d5eefc592d022f84551982bf13886526c36d57a2dfc2f2fddf
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
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extension
.adww
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offline_id
z8lhl4oForVEc7gy9Ra8rSqjYMl3xiFRuIW4not1
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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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vidar
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54.9
-
517
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https://t.me/larsenup
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https://ioc.exchange/@zebra54
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profile_id
517
Signatures
- Detected Djvu ransomware 12 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.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 12 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 3 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 4 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.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 24 IoCs
- Suspicious use of AdjustPrivilegeToken 38 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\26A2.exeC:\Users\Admin\AppData\Local\Temp\26A2.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\26A2.exeC:\Users\Admin\AppData\Local\Temp\26A2.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\8feda051-629d-45db-b9bf-fddc32d394fb" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\26A2.exe"C:\Users\Admin\AppData\Local\Temp\26A2.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\26A2.exe"C:\Users\Admin\AppData\Local\Temp\26A2.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\3c4d629c-c34c-415d-acaf-09d976644499\build2.exe"C:\Users\Admin\AppData\Local\3c4d629c-c34c-415d-acaf-09d976644499\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\3c4d629c-c34c-415d-acaf-09d976644499\build2.exe"C:\Users\Admin\AppData\Local\3c4d629c-c34c-415d-acaf-09d976644499\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
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-
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C:\Users\Admin\AppData\Local\3c4d629c-c34c-415d-acaf-09d976644499\build3.exe"C:\Users\Admin\AppData\Local\3c4d629c-c34c-415d-acaf-09d976644499\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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-
-
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C:\Users\Admin\AppData\Local\Temp\2C70.exeC:\Users\Admin\AppData\Local\Temp\2C70.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 520 -s 5362⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 520 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 520 -s 5642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 520 -s 6122⤵
- Program crash
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\2F7E.dll1⤵
- Loads dropped DLL
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\2F7E.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\324E.exeC:\Users\Admin\AppData\Local\Temp\324E.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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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 408 -p 520 -ip 5201⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 520 -ip 5201⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 520 -ip 5201⤵
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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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C:\Users\Admin\AppData\Local\Temp\AD6A.exeC:\Users\Admin\AppData\Local\Temp\AD6A.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\B27C.exeC:\Users\Admin\AppData\Local\Temp\B27C.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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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 476 -p 520 -ip 5201⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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
build3.exe
build3.exe
26A2.exe
26A2.exe
26A2.exe
26A2.exe
26A2.exe
26A2.exe
2C70.exe
2C70.exe
2F7E.dll
2F7E.dll
324E.exe
324E.exe
AD6A.exe
AD6A.exe
B27C.exe
B27C.exe
mstsca.exe
mstsca.exe
memory/444-244-0x00000000006D0000-0x00000000006D9000-memory.dmp
memory/444-245-0x00000000006C0000-0x00000000006CF000-memory.dmp
memory/444-267-0x00000000006D0000-0x00000000006D9000-memory.dmp
memory/520-228-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/520-173-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/520-172-0x0000000002F90000-0x00000000033D7000-memory.dmp
memory/1104-162-0x0000000000C00000-0x0000000000C6B000-memory.dmp
memory/1104-158-0x0000000000C70000-0x0000000000CE5000-memory.dmp
memory/1104-160-0x0000000000C00000-0x0000000000C6B000-memory.dmp
memory/1564-248-0x0000000000D40000-0x0000000000D49000-memory.dmp
memory/1564-268-0x0000000000D50000-0x0000000000D55000-memory.dmp
memory/1564-247-0x0000000000D50000-0x0000000000D55000-memory.dmp
memory/1952-178-0x0000000003570000-0x0000000003619000-memory.dmp
memory/1952-168-0x0000000003360000-0x0000000003489000-memory.dmp
memory/1952-181-0x0000000003360000-0x0000000003489000-memory.dmp
memory/1952-179-0x0000000003570000-0x0000000003619000-memory.dmp
memory/1952-167-0x0000000003100000-0x000000000322E000-memory.dmp
memory/1952-177-0x00000000034A0000-0x000000000355D000-memory.dmp
memory/1992-132-0x000000000066C000-0x000000000067C000-memory.dmp
memory/1992-135-0x0000000000400000-0x0000000000449000-memory.dmp
memory/1992-134-0x0000000000400000-0x0000000000449000-memory.dmp
memory/1992-133-0x00000000005A0000-0x00000000005A9000-memory.dmp
memory/2180-253-0x0000000000B00000-0x0000000000B22000-memory.dmp
memory/2180-254-0x0000000000AD0000-0x0000000000AF7000-memory.dmp
memory/2180-270-0x0000000000B00000-0x0000000000B22000-memory.dmp
memory/2248-161-0x0000000000510000-0x000000000051C000-memory.dmp
memory/2332-192-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2332-232-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2332-185-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2332-187-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2456-262-0x00000000005F0000-0x00000000005FD000-memory.dmp
memory/2456-273-0x0000000000800000-0x0000000000807000-memory.dmp
memory/2456-261-0x0000000000800000-0x0000000000807000-memory.dmp
memory/2472-197-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2472-203-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2472-239-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2472-208-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2472-200-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2712-272-0x0000000000270000-0x0000000000276000-memory.dmp
memory/2712-258-0x0000000000270000-0x0000000000276000-memory.dmp
memory/2712-259-0x0000000000260000-0x000000000026B000-memory.dmp
memory/2720-142-0x0000000002111000-0x00000000021A2000-memory.dmp
memory/2720-144-0x00000000021B0000-0x00000000022CB000-memory.dmp
memory/2828-266-0x0000000000230000-0x0000000000237000-memory.dmp
memory/2828-241-0x0000000000230000-0x0000000000237000-memory.dmp
memory/2828-242-0x0000000000220000-0x000000000022B000-memory.dmp
memory/3124-166-0x0000000000400000-0x0000000000449000-memory.dmp
memory/3124-165-0x0000000000480000-0x0000000000489000-memory.dmp
memory/3124-169-0x0000000000400000-0x0000000000449000-memory.dmp
memory/3124-164-0x00000000004CB000-0x00000000004DC000-memory.dmp
memory/3296-201-0x000000000097D000-0x00000000009A9000-memory.dmp
memory/3296-202-0x00000000008F0000-0x000000000093A000-memory.dmp
memory/3496-274-0x0000000000D60000-0x0000000000D68000-memory.dmp
memory/3496-264-0x0000000000D60000-0x0000000000D68000-memory.dmp
memory/3496-265-0x0000000000D50000-0x0000000000D5B000-memory.dmp
memory/4072-256-0x0000000000AD0000-0x0000000000AD9000-memory.dmp
memory/4072-271-0x0000000000AE0000-0x0000000000AE5000-memory.dmp
memory/4180-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4180-175-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4180-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4180-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4180-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4180-170-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4868-269-0x00000000010A0000-0x00000000010A6000-memory.dmp
memory/4868-250-0x00000000010A0000-0x00000000010A6000-memory.dmp
memory/4868-251-0x0000000001090000-0x000000000109C000-memory.dmp
memory/4988-186-0x000000000215E000-0x00000000021EF000-memory.dmp