Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
09/01/2023, 01:56
General
- Target 78a67197c8c731983efab4b3b1628dcf.exe
- Size 260KB
- Sample230109-ccn8bseg5x
- SHA256 caefec94c0e5bb899a37db8b1f470453ce8ad2050ace464a3e9c16f801f99c94
Malware Config
Extracted
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djvu
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http://spaceris.com/lancer/get.php
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extension
.bpto
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offline_id
pu5TgkFNAS5fWQ2rCzdamsmMrE5wSlTupdTI0pt1
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payload_url
http://uaery.top/dl/build2.exe
http://spaceris.com/files/1/build3.exe
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ransomnote
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Extracted
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vidar
-
1.8
-
19
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https://t.me/year2023start
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https://steamcommunity.com/profiles/76561199467421923
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profile_id
19
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.
- Blocklisted process makes network request 1 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 13 IoCs
- Checks computer location settings 2 TTPs 3 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 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 NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 4 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 3 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 28 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
- Modifies Internet Explorer settings 1 TTPs 4 IoCs
- Modifies registry class 30 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of AdjustPrivilegeToken 35 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 64 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\78a67197c8c731983efab4b3b1628dcf.exe"C:\Users\Admin\AppData\Local\Temp\78a67197c8c731983efab4b3b1628dcf.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\252B.exeC:\Users\Admin\AppData\Local\Temp\252B.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\252B.exeC:\Users\Admin\AppData\Local\Temp\252B.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\52eb9fd2-fe9a-4dad-907f-0a4f96ed9ac8" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\252B.exe"C:\Users\Admin\AppData\Local\Temp\252B.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\252B.exe"C:\Users\Admin\AppData\Local\Temp\252B.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\279d3238-96bc-4845-b5b4-d7e39b21dffa\build2.exe"C:\Users\Admin\AppData\Local\279d3238-96bc-4845-b5b4-d7e39b21dffa\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\279d3238-96bc-4845-b5b4-d7e39b21dffa\build2.exe"C:\Users\Admin\AppData\Local\279d3238-96bc-4845-b5b4-d7e39b21dffa\build2.exe"6⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
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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\279d3238-96bc-4845-b5b4-d7e39b21dffa\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\279d3238-96bc-4845-b5b4-d7e39b21dffa\build3.exe"C:\Users\Admin\AppData\Local\279d3238-96bc-4845-b5b4-d7e39b21dffa\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\283A.exeC:\Users\Admin\AppData\Local\Temp\283A.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\2964.exeC:\Users\Admin\AppData\Local\Temp\2964.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2356 -s 3442⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\2ABC.exeC:\Users\Admin\AppData\Local\Temp\2ABC.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2264 -s 12522⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\3472.exeC:\Users\Admin\AppData\Local\Temp\3472.exe1⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2356 -ip 23561⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 2264 -ip 22641⤵
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C:\Users\Admin\AppData\Local\Temp\C8F2.exeC:\Users\Admin\AppData\Local\Temp\C8F2.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Wtfoiq.tmp",Iyidwoiowsw2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Checks processor information in registry
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 155913⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 928 -s 5322⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 928 -ip 9281⤵
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
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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
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
252B.exe
252B.exe
252B.exe
252B.exe
252B.exe
252B.exe
283A.exe
283A.exe
2964.exe
2964.exe
2ABC.exe
2ABC.exe
3472.exe
3472.exe
C8F2.exe
C8F2.exe
Wtfoiq.tmp
Wtfoiq.tmp
mstsca.exe
mstsca.exe
memory/260-155-0x0000000004855000-0x00000000048E6000-memory.dmp
memory/260-158-0x0000000004920000-0x0000000004A3B000-memory.dmp
memory/928-247-0x0000000004980000-0x0000000004A95000-memory.dmp
memory/928-246-0x00000000048A3000-0x0000000004977000-memory.dmp
memory/928-248-0x0000000000400000-0x0000000002C6D000-memory.dmp
memory/928-249-0x0000000000400000-0x0000000002C6D000-memory.dmp
memory/1632-205-0x0000000000400000-0x0000000000FA3000-memory.dmp
memory/1632-204-0x0000000000400000-0x0000000000FA3000-memory.dmp
memory/1632-156-0x0000000000400000-0x0000000000FA3000-memory.dmp
memory/1656-214-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1656-194-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1656-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1656-187-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2264-174-0x0000000000400000-0x0000000002BC8000-memory.dmp
memory/2264-173-0x0000000007ED0000-0x0000000007FDA000-memory.dmp
memory/2264-182-0x0000000008A70000-0x0000000008C32000-memory.dmp
memory/2264-175-0x00000000072B0000-0x00000000072C2000-memory.dmp
memory/2264-178-0x0000000002DED000-0x0000000002E1B000-memory.dmp
memory/2264-181-0x0000000008970000-0x0000000008A02000-memory.dmp
memory/2264-180-0x00000000082B0000-0x0000000008316000-memory.dmp
memory/2264-183-0x0000000008C40000-0x000000000916C000-memory.dmp
memory/2264-172-0x00000000078B0000-0x0000000007EC8000-memory.dmp
memory/2264-167-0x0000000007300000-0x00000000078A4000-memory.dmp
memory/2264-166-0x0000000002D40000-0x0000000002D8B000-memory.dmp
memory/2264-176-0x0000000007FE0000-0x000000000801C000-memory.dmp
memory/2264-199-0x0000000002DED000-0x0000000002E1B000-memory.dmp
memory/2264-198-0x0000000000400000-0x0000000002BC8000-memory.dmp
memory/2356-163-0x0000000000400000-0x0000000002BAA000-memory.dmp
memory/2356-164-0x0000000002EDD000-0x0000000002EED000-memory.dmp
memory/2856-171-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2856-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2856-154-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2856-157-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2856-160-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3368-262-0x000002CD5E7A0000-0x000002CD5EA52000-memory.dmp
memory/3368-261-0x000002CD60200000-0x000002CD60340000-memory.dmp
memory/3368-263-0x000002CD5E7A0000-0x000002CD5EA52000-memory.dmp
memory/3368-260-0x000002CD60200000-0x000002CD60340000-memory.dmp
memory/3368-264-0x00000000003F0000-0x0000000000691000-memory.dmp
memory/4088-255-0x0000000004330000-0x0000000004470000-memory.dmp
memory/4088-253-0x0000000004330000-0x0000000004470000-memory.dmp
memory/4088-251-0x0000000006190000-0x0000000006CD1000-memory.dmp
memory/4088-268-0x0000000006190000-0x0000000006CD1000-memory.dmp
memory/4088-259-0x00000000043A9000-0x00000000043AB000-memory.dmp
memory/4088-257-0x0000000004330000-0x0000000004470000-memory.dmp
memory/4088-256-0x0000000004330000-0x0000000004470000-memory.dmp
memory/4088-252-0x0000000004330000-0x0000000004470000-memory.dmp
memory/4088-254-0x0000000004330000-0x0000000004470000-memory.dmp
memory/4088-250-0x0000000006190000-0x0000000006CD1000-memory.dmp
memory/4256-212-0x0000000001FA0000-0x0000000001FEC000-memory.dmp
memory/4256-210-0x0000000000618000-0x0000000000646000-memory.dmp
memory/4640-179-0x0000000000400000-0x0000000002BA9000-memory.dmp
memory/4640-161-0x0000000002D00000-0x0000000002D09000-memory.dmp
memory/4640-162-0x0000000000400000-0x0000000002BA9000-memory.dmp
memory/4640-177-0x0000000002F2D000-0x0000000002F3D000-memory.dmp
memory/4676-132-0x0000000002DFD000-0x0000000002E0E000-memory.dmp
memory/4676-133-0x0000000002D40000-0x0000000002D49000-memory.dmp
memory/4676-134-0x0000000000400000-0x0000000002BA9000-memory.dmp
memory/4676-135-0x0000000000400000-0x0000000002BA9000-memory.dmp
memory/5036-188-0x0000000004727000-0x00000000047B8000-memory.dmp
memory/5072-241-0x0000000000400000-0x0000000000460000-memory.dmp
memory/5072-207-0x0000000000400000-0x0000000000460000-memory.dmp
memory/5072-213-0x0000000000400000-0x0000000000460000-memory.dmp
memory/5072-239-0x0000000000400000-0x0000000000460000-memory.dmp
memory/5072-215-0x0000000050AB0000-0x0000000050B42000-memory.dmp
memory/5072-211-0x0000000000400000-0x0000000000460000-memory.dmp
memory/5072-209-0x0000000000400000-0x0000000000460000-memory.dmp