Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
19/10/2022, 08:03
General
- Target file.exe
- Size 229KB
- Sample221019-jx5jdaffcl
- SHA256 1e2cccc0f24a39856eeff87ee08f3e1baf14e7bd1155a0c6e5671019b01b1fa9
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
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extension
.tury
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offline_id
Uz66zEbmA32arcxwT81zZhkb23026oHz5iSp8qt1
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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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55
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517
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https://t.me/truewallets
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https://mas.to/@zara99
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http://116.203.10.3:80
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profile_id
517
Signatures
- DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
- Detected Djvu ransomware 19 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.
- DCRat payload 1 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
- Downloads MZ/PE file
- Executes dropped EXE 21 IoCs
- Checks computer location settings 2 TTPs 5 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.
- Uses the VBS compiler for execution 1 TTPs
- 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 5 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 7 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 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Delays execution with timeout.exe 1 IoCs
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 24 IoCs
- Suspicious use of AdjustPrivilegeToken 37 IoCs
- Suspicious use of SetWindowsHookEx 1 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\3633.exeC:\Users\Admin\AppData\Local\Temp\3633.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\3633.exeC:\Users\Admin\AppData\Local\Temp\3633.exe2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\3633.exe"C:\Users\Admin\AppData\Local\Temp\3633.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\3633.exe"C:\Users\Admin\AppData\Local\Temp\3633.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\d17891cf-a296-4152-9c29-f7b846d78efe\build2.exe"C:\Users\Admin\AppData\Local\d17891cf-a296-4152-9c29-f7b846d78efe\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Users\Admin\AppData\Local\d17891cf-a296-4152-9c29-f7b846d78efe\build2.exe"C:\Users\Admin\AppData\Local\d17891cf-a296-4152-9c29-f7b846d78efe\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/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\d17891cf-a296-4152-9c29-f7b846d78efe\build2.exe" & del C:\PrograData\*.dll & exit7⤵
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C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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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\d17891cf-a296-4152-9c29-f7b846d78efe\build3.exe"C:\Users\Admin\AppData\Local\d17891cf-a296-4152-9c29-f7b846d78efe\build3.exe"5⤵
- 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"6⤵
- Creates scheduled task(s)
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\3847.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\3847.dll2⤵
- Loads dropped DLL
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C:\Users\Admin\AppData\Local\Temp\3923.exeC:\Users\Admin\AppData\Local\Temp\3923.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\3923.exeC:\Users\Admin\AppData\Local\Temp\3923.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\6d12ff1f-009e-46cb-aeec-b27d67caf3fa" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\3923.exe"C:\Users\Admin\AppData\Local\Temp\3923.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\3923.exe"C:\Users\Admin\AppData\Local\Temp\3923.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
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C:\Users\Admin\AppData\Local\72075b4a-78a6-47ba-9d88-ea160fa98d79\build2.exe"C:\Users\Admin\AppData\Local\72075b4a-78a6-47ba-9d88-ea160fa98d79\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Users\Admin\AppData\Local\72075b4a-78a6-47ba-9d88-ea160fa98d79\build2.exe"C:\Users\Admin\AppData\Local\72075b4a-78a6-47ba-9d88-ea160fa98d79\build2.exe"6⤵
- Executes dropped EXE
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-
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C:\Users\Admin\AppData\Local\72075b4a-78a6-47ba-9d88-ea160fa98d79\build3.exe"C:\Users\Admin\AppData\Local\72075b4a-78a6-47ba-9d88-ea160fa98d79\build3.exe"5⤵
- 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"6⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\3B47.exeC:\Users\Admin\AppData\Local\Temp\3B47.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:\Users\Admin\AppData\Local\Temp\AC32.exeC:\Users\Admin\AppData\Local\Temp\AC32.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\BF0F.exeC:\Users\Admin\AppData\Local\Temp\BF0F.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Users\Admin\AppData\Local\Temp\CEFE.exeC:\Users\Admin\AppData\Local\Temp\CEFE.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 88628 -s 16762⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\DEDE.exeC:\Users\Admin\AppData\Local\Temp\DEDE.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\E279.exeC:\Users\Admin\AppData\Local\Temp\E279.exe1⤵
- Executes dropped EXE
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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\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\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 88628 -ip 886281⤵
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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
PersonalID.txt
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
3923.exe
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
3633.exe
3633.exe
3633.exe
3633.exe
3633.exe
3847.dll
3847.dll
3923.exe
3923.exe
3923.exe
3923.exe
3923.exe
3B47.exe
3B47.exe
AC32.exe
AC32.exe
BF0F.exe
BF0F.exe
CEFE.exe
CEFE.exe
DEDE.exe
DEDE.exe
E279.exe
E279.exe
bowsakkdestx.txt
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
mstsca.exe
mstsca.exe
mstsca.exe
memory/60-270-0x00000000005B0000-0x00000000006B0000-memory.dmp
memory/60-256-0x00000000005B0000-0x00000000006B0000-memory.dmp
memory/836-329-0x0000000000920000-0x0000000000929000-memory.dmp
memory/836-328-0x0000000000930000-0x0000000000935000-memory.dmp
memory/1064-154-0x0000000000630000-0x000000000063C000-memory.dmp
memory/1088-188-0x00000000006F5000-0x0000000000787000-memory.dmp
memory/1092-318-0x00000000009A0000-0x00000000009A5000-memory.dmp
memory/1092-319-0x0000000000990000-0x0000000000999000-memory.dmp
memory/1100-269-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1100-212-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1100-215-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1100-211-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1604-168-0x0000000002031000-0x00000000020C2000-memory.dmp
memory/1752-171-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1752-163-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1752-197-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1752-166-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1752-173-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2240-226-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2240-267-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2240-218-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2240-227-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2240-231-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2264-152-0x0000000000290000-0x00000000002FB000-memory.dmp
memory/2264-151-0x0000000000300000-0x0000000000375000-memory.dmp
memory/2264-158-0x0000000000290000-0x00000000002FB000-memory.dmp
memory/2292-157-0x0000000003430000-0x0000000003544000-memory.dmp
memory/2292-199-0x00000000037A0000-0x0000000003862000-memory.dmp
memory/2292-200-0x0000000003880000-0x000000000392D000-memory.dmp
memory/2292-203-0x0000000003670000-0x0000000003784000-memory.dmp
memory/2292-156-0x0000000003670000-0x0000000003784000-memory.dmp
memory/2848-172-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2848-174-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2848-170-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2848-181-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2856-207-0x000000000200F000-0x00000000020A0000-memory.dmp
memory/3100-187-0x0000000000400000-0x0000000000597000-memory.dmp
memory/3100-159-0x00000000005F3000-0x0000000000604000-memory.dmp
memory/3100-161-0x0000000000400000-0x0000000000597000-memory.dmp
memory/3100-160-0x00000000001F0000-0x00000000001F9000-memory.dmp
memory/3276-264-0x0000000000400000-0x0000000000463000-memory.dmp
memory/3332-224-0x000000000088D000-0x00000000008B9000-memory.dmp
memory/3332-225-0x0000000000810000-0x000000000085F000-memory.dmp
memory/3776-322-0x00000000012C0000-0x00000000012CC000-memory.dmp
memory/3776-321-0x00000000012D0000-0x00000000012D6000-memory.dmp
memory/4788-134-0x0000000000400000-0x0000000000597000-memory.dmp
memory/4788-135-0x0000000000400000-0x0000000000597000-memory.dmp
memory/4788-133-0x00000000001F0000-0x00000000001F9000-memory.dmp
memory/4788-132-0x0000000000603000-0x0000000000614000-memory.dmp
memory/4848-325-0x0000000000940000-0x0000000000967000-memory.dmp
memory/4848-324-0x0000000000970000-0x0000000000992000-memory.dmp
memory/5012-153-0x0000000000899000-0x000000000092B000-memory.dmp
memory/5012-155-0x00000000021D0000-0x00000000022EB000-memory.dmp
memory/5112-263-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5112-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5112-186-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5112-195-0x0000000000400000-0x0000000000537000-memory.dmp
memory/88628-289-0x0000000000860000-0x00000000008B9000-memory.dmp
memory/88628-297-0x0000000005990000-0x00000000059CC000-memory.dmp
memory/88628-307-0x0000000006E10000-0x0000000006E2E000-memory.dmp
memory/88628-305-0x0000000006440000-0x0000000006602000-memory.dmp
memory/88628-331-0x00000000008F3000-0x000000000092A000-memory.dmp
memory/88628-288-0x00000000008F3000-0x000000000092A000-memory.dmp
memory/88628-290-0x0000000000400000-0x00000000005B9000-memory.dmp
memory/88628-291-0x00000000051F0000-0x0000000005808000-memory.dmp
memory/88628-292-0x0000000005860000-0x0000000005872000-memory.dmp
memory/88628-295-0x0000000005880000-0x000000000598A000-memory.dmp
memory/88628-306-0x0000000006D60000-0x0000000006DD6000-memory.dmp
memory/88628-301-0x0000000006380000-0x0000000006412000-memory.dmp
memory/99944-296-0x0000000006370000-0x00000000063D6000-memory.dmp
memory/99944-287-0x0000000005D50000-0x00000000062F4000-memory.dmp
memory/99944-294-0x0000000006830000-0x0000000006D5C000-memory.dmp
memory/99944-293-0x0000000005990000-0x00000000059E0000-memory.dmp
memory/99944-281-0x0000000000400000-0x0000000000570000-memory.dmp
memory/99944-326-0x0000000006810000-0x000000000681A000-memory.dmp
memory/100244-313-0x0000000000920000-0x000000000092B000-memory.dmp
memory/100244-312-0x0000000000930000-0x0000000000937000-memory.dmp
memory/100344-315-0x0000000000D80000-0x0000000000D89000-memory.dmp
memory/100344-316-0x0000000000D70000-0x0000000000D7F000-memory.dmp