Analysis
- max time kernel
150s - max time network
139s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
08/01/2023, 18:16
General
- Target 1f142434b30d5fd70e7b592cf5e66960f2b16fc355af9.exe
- Size 264KB
- Sample230108-wwfvvaec79
- SHA256 1f142434b30d5fd70e7b592cf5e66960f2b16fc355af988383d908a4aa5544cf
Malware Config
Extracted
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djvu
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http://spaceris.com/lancer/get.php
-
extension
.bpto
-
offline_id
pu5TgkFNAS5fWQ2rCzdamsmMrE5wSlTupdTI0pt1
-
payload_url
http://uaery.top/dl/build2.exe
http://spaceris.com/files/1/build3.exe
-
ransomnote
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Extracted
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vidar
-
1.8
-
19
-
https://t.me/year2023start
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https://steamcommunity.com/profiles/76561199467421923
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profile_id
19
Signatures
- DcRat 4 IoCs
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
- 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 14 IoCs
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 6 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 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 26 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 38 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\1f142434b30d5fd70e7b592cf5e66960f2b16fc355af9.exe"C:\Users\Admin\AppData\Local\Temp\1f142434b30d5fd70e7b592cf5e66960f2b16fc355af9.exe"1⤵
- DcRat
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\E12D.exeC:\Users\Admin\AppData\Local\Temp\E12D.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1496 -s 12402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\E351.exeC:\Users\Admin\AppData\Local\Temp\E351.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\E351.exeC:\Users\Admin\AppData\Local\Temp\E351.exe2⤵
- DcRat
- 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\5d8bd3c3-5588-499f-8b42-bfb78e8c958f" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
-
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C:\Users\Admin\AppData\Local\Temp\E351.exe"C:\Users\Admin\AppData\Local\Temp\E351.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\E351.exe"C:\Users\Admin\AppData\Local\Temp\E351.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\76359a69-c8ed-4cd8-8ccf-8205ed835009\build2.exe"C:\Users\Admin\AppData\Local\76359a69-c8ed-4cd8-8ccf-8205ed835009\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\76359a69-c8ed-4cd8-8ccf-8205ed835009\build2.exe"C:\Users\Admin\AppData\Local\76359a69-c8ed-4cd8-8ccf-8205ed835009\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\76359a69-c8ed-4cd8-8ccf-8205ed835009\build2.exe" & exit7⤵
-
C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
-
-
-
-
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C:\Users\Admin\AppData\Local\76359a69-c8ed-4cd8-8ccf-8205ed835009\build3.exe"C:\Users\Admin\AppData\Local\76359a69-c8ed-4cd8-8ccf-8205ed835009\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
-
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⤵
- DcRat
- Creates scheduled task(s)
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-
-
-
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C:\Users\Admin\AppData\Local\Temp\EB03.exeC:\Users\Admin\AppData\Local\Temp\EB03.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
-
C:\Users\Admin\AppData\Local\Temp\ECD9.exeC:\Users\Admin\AppData\Local\Temp\ECD9.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2292 -s 3442⤵
- Program crash
-
-
C:\Users\Admin\AppData\Local\Temp\EEFC.exeC:\Users\Admin\AppData\Local\Temp\EEFC.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 12162⤵
- Program crash
-
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C:\Users\Admin\AppData\Local\Temp\FCD8.exeC:\Users\Admin\AppData\Local\Temp\FCD8.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2292 -ip 22921⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 1496 -ip 14961⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 4716 -ip 47161⤵
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C:\Users\Admin\AppData\Local\Temp\BB28.exeC:\Users\Admin\AppData\Local\Temp\BB28.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 155703⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2692 -s 5602⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 2692 -ip 26921⤵
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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⤵
- DcRat
- Creates scheduled task(s)
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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⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
mozglue.dll
nss3.dll
sqlite3.dll
E351.exe
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
BB28.exe
BB28.exe
E12D.exe
E12D.exe
E351.exe
E351.exe
E351.exe
E351.exe
E351.exe
EB03.exe
EB03.exe
ECD9.exe
ECD9.exe
EEFC.exe
EEFC.exe
FCD8.exe
FCD8.exe
Wtfoiq.tmp
Wtfoiq.tmp
mstsca.exe
mstsca.exe
memory/1496-146-0x0000000004800000-0x000000000484B000-memory.dmp
memory/1496-162-0x0000000007A30000-0x0000000008048000-memory.dmp
memory/1496-156-0x0000000000400000-0x0000000002BC7000-memory.dmp
memory/1496-165-0x0000000007410000-0x000000000744C000-memory.dmp
memory/1496-189-0x0000000002CAD000-0x0000000002CDB000-memory.dmp
memory/1496-178-0x00000000083F0000-0x0000000008482000-memory.dmp
memory/1496-179-0x0000000008490000-0x00000000084F6000-memory.dmp
memory/1496-164-0x00000000073F0000-0x0000000007402000-memory.dmp
memory/1496-147-0x0000000007480000-0x0000000007A24000-memory.dmp
memory/1496-163-0x0000000008050000-0x000000000815A000-memory.dmp
memory/1496-188-0x0000000008FC0000-0x00000000094EC000-memory.dmp
memory/1496-145-0x0000000002CAD000-0x0000000002CDB000-memory.dmp
memory/1496-200-0x0000000000400000-0x0000000002BC7000-memory.dmp
memory/1496-187-0x0000000008DE0000-0x0000000008FA2000-memory.dmp
memory/1948-190-0x00000000048FA000-0x000000000498B000-memory.dmp
memory/1960-201-0x0000000000400000-0x0000000000FA3000-memory.dmp
memory/1960-215-0x0000000000400000-0x0000000000FA3000-memory.dmp
memory/1960-171-0x0000000000400000-0x0000000000FA3000-memory.dmp
memory/2184-266-0x00000000041D0000-0x0000000004310000-memory.dmp
memory/2184-265-0x00000000041D0000-0x0000000004310000-memory.dmp
memory/2184-272-0x0000000004249000-0x000000000424B000-memory.dmp
memory/2184-270-0x00000000041D0000-0x0000000004310000-memory.dmp
memory/2184-277-0x0000000005FD0000-0x0000000006B11000-memory.dmp
memory/2184-269-0x00000000041D0000-0x0000000004310000-memory.dmp
memory/2184-260-0x0000000005FD0000-0x0000000006B11000-memory.dmp
memory/2184-268-0x00000000041D0000-0x0000000004310000-memory.dmp
memory/2184-267-0x00000000041D0000-0x0000000004310000-memory.dmp
memory/2184-261-0x0000000005FD0000-0x0000000006B11000-memory.dmp
memory/2292-177-0x0000000000400000-0x0000000002BAA000-memory.dmp
memory/2692-258-0x0000000004A40000-0x0000000004B55000-memory.dmp
memory/2692-259-0x0000000000400000-0x0000000002C6D000-memory.dmp
memory/2692-257-0x000000000495D000-0x0000000004A31000-memory.dmp
memory/2984-275-0x0000000000E30000-0x00000000010D1000-memory.dmp
memory/2984-276-0x000001BC8F290000-0x000001BC8F542000-memory.dmp
memory/2984-274-0x000001BC90CF0000-0x000001BC90E30000-memory.dmp
memory/2984-273-0x000001BC90CF0000-0x000001BC90E30000-memory.dmp
memory/3344-227-0x0000000050C70000-0x0000000050D02000-memory.dmp
memory/3344-222-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3344-223-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3344-224-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3344-219-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3344-226-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3344-252-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3396-166-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3396-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3396-184-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3396-158-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3396-161-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3896-173-0x0000000002C9D000-0x0000000002CAD000-memory.dmp
memory/3896-174-0x00000000047A0000-0x00000000047A9000-memory.dmp
memory/3896-176-0x0000000000400000-0x0000000002BA9000-memory.dmp
memory/3896-182-0x0000000000400000-0x0000000002BA9000-memory.dmp
memory/3940-216-0x00000000006B8000-0x00000000006E6000-memory.dmp
memory/3940-218-0x00000000004F0000-0x000000000053C000-memory.dmp
memory/3940-221-0x00000000006B8000-0x00000000006E6000-memory.dmp
memory/4032-159-0x0000000004910000-0x0000000004A2B000-memory.dmp
memory/4032-160-0x000000000487B000-0x000000000490C000-memory.dmp
memory/4500-134-0x0000000000400000-0x0000000002BAA000-memory.dmp
memory/4500-135-0x0000000000400000-0x0000000002BAA000-memory.dmp
memory/4500-132-0x0000000002CDD000-0x0000000002CEE000-memory.dmp
memory/4500-133-0x0000000002C70000-0x0000000002C79000-memory.dmp
memory/4716-180-0x0000000000400000-0x0000000002BC8000-memory.dmp
memory/4716-207-0x0000000000400000-0x0000000002BC8000-memory.dmp
memory/4716-185-0x0000000002E7D000-0x0000000002EAB000-memory.dmp
memory/4716-206-0x0000000002E7D000-0x0000000002EAB000-memory.dmp
memory/4928-202-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4928-195-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4928-194-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4928-225-0x0000000000400000-0x0000000000537000-memory.dmp