Analysis
- max time kernel
150s - max time network
138s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
07/10/2022, 10:01
General
- Target file.exe
- Size 265KB
- Sample221007-l18rbacbc8
- SHA256 35bf8b9ff2215891a729d1d478bb8193469d0b808cc2f9cf84fd8cff9a348fe7
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
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extension
.towz
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offline_id
SSHsHMHGmSIhrz50VnIxLJJX15osxEQY6iXedXt1
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payload_url
http://rgyui.top/dl/build2.exe
http://winnlinne.com/files/1/build3.exe
-
ransomnote
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Extracted
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vidar
-
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 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.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 15 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 4 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.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- 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 9 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 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⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\5822.exeC:\Users\Admin\AppData\Local\Temp\5822.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\5822.exeC:\Users\Admin\AppData\Local\Temp\5822.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\937231d2-5e24-4e63-81d9-cfa1146cc587" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\5822.exe"C:\Users\Admin\AppData\Local\Temp\5822.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\5822.exe"C:\Users\Admin\AppData\Local\Temp\5822.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\d8012a34-942a-4f85-81a9-b8f3d6668084\build2.exe"C:\Users\Admin\AppData\Local\d8012a34-942a-4f85-81a9-b8f3d6668084\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\d8012a34-942a-4f85-81a9-b8f3d6668084\build2.exe"C:\Users\Admin\AppData\Local\d8012a34-942a-4f85-81a9-b8f3d6668084\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
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C:\Users\Admin\AppData\Local\d8012a34-942a-4f85-81a9-b8f3d6668084\build3.exe"C:\Users\Admin\AppData\Local\d8012a34-942a-4f85-81a9-b8f3d6668084\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:\Users\Admin\AppData\Local\Temp\5D63.exeC:\Users\Admin\AppData\Local\Temp\5D63.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 5602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 5802⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 5802⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 7042⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 7842⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 8682⤵
- Program crash
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C:\Windows\SysWOW64\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 13202⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 12802⤵
- Program crash
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C:\Windows\SysWOW64\cmd.execmd /C "wmic path win32_VideoController get name"2⤵
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic path win32_VideoController get name3⤵
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C:\Windows\SysWOW64\cmd.execmd /C "wmic cpu get name"2⤵
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic cpu get name3⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 2322⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\5F58.exeC:\Users\Admin\AppData\Local\Temp\5F58.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\62C4.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\62C4.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⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1580 -ip 15801⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1580 -ip 15801⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1580 -ip 15801⤵
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C:\Users\Admin\AppData\Local\Temp\E15B.exeC:\Users\Admin\AppData\Local\Temp\E15B.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1580 -ip 15801⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 1580 -ip 15801⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1580 -ip 15801⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1580 -ip 15801⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1580 -ip 15801⤵
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C:\Users\Admin\AppData\Local\Temp\E871.exeC:\Users\Admin\AppData\Local\Temp\E871.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\EB7F.exeC:\Users\Admin\AppData\Local\Temp\EB7F.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1580 -ip 15801⤵
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C:\Users\Admin\AppData\Local\Temp\2A2.exeC:\Users\Admin\AppData\Local\Temp\2A2.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\1010.exeC:\Users\Admin\AppData\Local\Temp\1010.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\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
Loading Replay Monitor...
Downloads
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
5822.exe
1010.exe
1010.exe
2A2.exe
2A2.exe
5822.exe
5822.exe
5822.exe
5822.exe
5822.exe
5D63.exe
5D63.exe
5F58.exe
5F58.exe
62C4.dll
62C4.dll
62C4.dll
E15B.exe
E15B.exe
E871.exe
E871.exe
EB7F.exe
EB7F.exe
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
mstsca.exe
mstsca.exe
memory/1184-171-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1184-167-0x000000000047D000-0x000000000048E000-memory.dmp
memory/1184-168-0x00000000005C0000-0x00000000005C9000-memory.dmp
memory/1184-169-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1392-255-0x0000000000400000-0x0000000000B6B000-memory.dmp
memory/1392-287-0x0000000000400000-0x0000000000B6B000-memory.dmp
memory/1392-253-0x0000000000400000-0x0000000000B6B000-memory.dmp
memory/1400-159-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-180-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-165-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-157-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-161-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1500-296-0x0000000000CA0000-0x0000000000CA5000-memory.dmp
memory/1500-279-0x0000000000C90000-0x0000000000C99000-memory.dmp
memory/1500-278-0x0000000000CA0000-0x0000000000CA5000-memory.dmp
memory/1552-162-0x0000000002220000-0x000000000233B000-memory.dmp
memory/1552-160-0x000000000218C000-0x000000000221D000-memory.dmp
memory/1576-273-0x00000000010F0000-0x00000000010FC000-memory.dmp
memory/1576-272-0x0000000001100000-0x0000000001106000-memory.dmp
memory/1576-294-0x0000000001100000-0x0000000001106000-memory.dmp
memory/1580-233-0x0000000000400000-0x00000000008D0000-memory.dmp
memory/1580-232-0x0000000003040000-0x0000000003487000-memory.dmp
memory/1580-249-0x0000000000400000-0x00000000008D0000-memory.dmp
memory/1776-290-0x0000000000400000-0x0000000000B6B000-memory.dmp
memory/1776-260-0x0000000000400000-0x0000000000B6B000-memory.dmp
memory/1776-265-0x0000000000400000-0x0000000000B6B000-memory.dmp
memory/1908-282-0x0000000000300000-0x000000000030B000-memory.dmp
memory/1908-281-0x0000000000310000-0x0000000000316000-memory.dmp
memory/1908-297-0x0000000000310000-0x0000000000316000-memory.dmp
memory/1956-207-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1956-198-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1956-208-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1956-237-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1956-202-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1984-132-0x00000000004CD000-0x00000000004DD000-memory.dmp
memory/1984-133-0x00000000005C0000-0x00000000005C9000-memory.dmp
memory/1984-135-0x0000000000400000-0x0000000000447000-memory.dmp
memory/1984-134-0x0000000000400000-0x0000000000447000-memory.dmp
memory/2532-298-0x0000000000D90000-0x0000000000D97000-memory.dmp
memory/2532-284-0x0000000000D90000-0x0000000000D97000-memory.dmp
memory/2532-285-0x0000000000D80000-0x0000000000D8D000-memory.dmp
memory/3172-195-0x00000000006EC000-0x0000000000718000-memory.dmp
memory/3172-197-0x0000000000650000-0x000000000069A000-memory.dmp
memory/3172-201-0x00000000006EC000-0x0000000000718000-memory.dmp
memory/3368-291-0x0000000000E10000-0x0000000000E17000-memory.dmp
memory/3368-264-0x0000000000E00000-0x0000000000E0B000-memory.dmp
memory/3368-263-0x0000000000E10000-0x0000000000E17000-memory.dmp
memory/3504-155-0x0000000000880000-0x000000000088C000-memory.dmp
memory/3904-266-0x0000000000AB0000-0x0000000000ABF000-memory.dmp
memory/3904-268-0x0000000000AC0000-0x0000000000AC9000-memory.dmp
memory/3904-292-0x0000000000AC0000-0x0000000000AC9000-memory.dmp
memory/4088-299-0x0000000000F30000-0x0000000000F38000-memory.dmp
memory/4088-288-0x0000000000F30000-0x0000000000F38000-memory.dmp
memory/4088-289-0x0000000000F20000-0x0000000000F2B000-memory.dmp
memory/4368-231-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4368-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4368-184-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4368-185-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4412-172-0x0000000002EA0000-0x0000000002F61000-memory.dmp
memory/4412-164-0x0000000002D60000-0x0000000002EA0000-memory.dmp
memory/4412-176-0x0000000002D60000-0x0000000002EA0000-memory.dmp
memory/4412-151-0x0000000002610000-0x0000000002810000-memory.dmp
memory/4412-173-0x0000000002F70000-0x000000000301D000-memory.dmp
memory/4412-163-0x0000000002A90000-0x0000000002C15000-memory.dmp
memory/4464-153-0x0000000000B20000-0x0000000000B95000-memory.dmp
memory/4464-154-0x0000000000AB0000-0x0000000000B1B000-memory.dmp
memory/4464-166-0x0000000000AB0000-0x0000000000B1B000-memory.dmp
memory/4752-186-0x0000000002051000-0x00000000020E2000-memory.dmp
memory/5068-276-0x0000000000EA0000-0x0000000000EC7000-memory.dmp
memory/5068-295-0x0000000000ED0000-0x0000000000EF2000-memory.dmp
memory/5068-275-0x0000000000ED0000-0x0000000000EF2000-memory.dmp
memory/5112-293-0x0000000000D40000-0x0000000000D45000-memory.dmp
memory/5112-269-0x0000000000D40000-0x0000000000D45000-memory.dmp
memory/5112-270-0x0000000000D30000-0x0000000000D39000-memory.dmp