Analysis
- max time kernel
150s - max time network
143s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
18/10/2022, 02:33
General
- Target file.exe
- Size 217KB
- Sample221018-c1vp1sebb6
- SHA256 3cbc356cb38e9df1f3c1712c97be3c429dc5b99e6adf839f1fbe273d5a2d9c41
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
-
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
- Detected Djvu ransomware 10 IoCs
- Detects Smokeloader packer 3 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 13 IoCs
- VMProtect packed file 6 IoCs
Detects executables packed with VMProtect commercial packer.
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 2 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 2 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.
- 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 17 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\B163.exeC:\Users\Admin\AppData\Local\Temp\B163.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\B163.exeC:\Users\Admin\AppData\Local\Temp\B163.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\de24f139-9d71-47ac-b995-8b690de9abdd" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\B163.exe"C:\Users\Admin\AppData\Local\Temp\B163.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\B163.exe"C:\Users\Admin\AppData\Local\Temp\B163.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\9b31c4bb-de99-4d58-844d-160294f49c1f\build2.exe"C:\Users\Admin\AppData\Local\9b31c4bb-de99-4d58-844d-160294f49c1f\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\9b31c4bb-de99-4d58-844d-160294f49c1f\build2.exe"C:\Users\Admin\AppData\Local\9b31c4bb-de99-4d58-844d-160294f49c1f\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\9b31c4bb-de99-4d58-844d-160294f49c1f\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\9b31c4bb-de99-4d58-844d-160294f49c1f\build3.exe"C:\Users\Admin\AppData\Local\9b31c4bb-de99-4d58-844d-160294f49c1f\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\B79E.exeC:\Users\Admin\AppData\Local\Temp\B79E.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\BA10.exeC:\Users\Admin\AppData\Local\Temp\BA10.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3228 -s 3402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\BDBA.exeC:\Users\Admin\AppData\Local\Temp\BDBA.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4828 -s 3402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3228 -ip 32281⤵
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C:\Users\Admin\AppData\Local\Temp\C193.exeC:\Users\Admin\AppData\Local\Temp\C193.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4828 -ip 48281⤵
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C:\Users\Admin\AppData\Local\Temp\C732.exeC:\Users\Admin\AppData\Local\Temp\C732.exe1⤵
- Executes dropped EXE
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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\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
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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
B163.exe
B163.exe
B163.exe
B163.exe
B163.exe
B79E.exe
B79E.exe
BA10.exe
BA10.exe
BDBA.exe
BDBA.exe
C193.exe
C193.exe
C732.exe
C732.exe
B163.exe
mstsca.exe
mstsca.exe
memory/100-142-0x000000000076F000-0x0000000000801000-memory.dmp
memory/100-144-0x0000000002340000-0x000000000245B000-memory.dmp
memory/648-208-0x00000000006DD000-0x0000000000709000-memory.dmp
memory/648-210-0x0000000002200000-0x000000000224F000-memory.dmp
memory/1904-260-0x0000000000670000-0x0000000000675000-memory.dmp
memory/1904-261-0x0000000000660000-0x0000000000669000-memory.dmp
memory/1904-276-0x0000000000670000-0x0000000000675000-memory.dmp
memory/1920-246-0x0000000000FB0000-0x0000000000FBB000-memory.dmp
memory/1920-271-0x0000000000FC0000-0x0000000000FC7000-memory.dmp
memory/1920-245-0x0000000000FC0000-0x0000000000FC7000-memory.dmp
memory/1960-249-0x0000000001090000-0x000000000109F000-memory.dmp
memory/1960-272-0x00000000010A0000-0x00000000010A9000-memory.dmp
memory/1960-248-0x00000000010A0000-0x00000000010A9000-memory.dmp
memory/1996-187-0x00000000006F0000-0x00000000006FC000-memory.dmp
memory/2032-258-0x0000000000490000-0x00000000004B7000-memory.dmp
memory/2032-275-0x00000000004C0000-0x00000000004E2000-memory.dmp
memory/2032-257-0x00000000004C0000-0x00000000004E2000-memory.dmp
memory/2060-252-0x0000000000990000-0x0000000000999000-memory.dmp
memory/2060-273-0x00000000009A0000-0x00000000009A5000-memory.dmp
memory/2060-251-0x00000000009A0000-0x00000000009A5000-memory.dmp
memory/2984-200-0x0000000000400000-0x0000000000594000-memory.dmp
memory/2984-158-0x00000000001F0000-0x00000000001F9000-memory.dmp
memory/2984-157-0x00000000008B3000-0x00000000008C4000-memory.dmp
memory/2984-159-0x0000000000400000-0x0000000000594000-memory.dmp
memory/3116-197-0x0000000000180000-0x00000000001EB000-memory.dmp
memory/3116-180-0x0000000000400000-0x0000000000475000-memory.dmp
memory/3116-182-0x0000000000180000-0x00000000001EB000-memory.dmp
memory/3228-161-0x00000000001F0000-0x00000000001F9000-memory.dmp
memory/3228-160-0x00000000008F3000-0x0000000000904000-memory.dmp
memory/3228-163-0x0000000000400000-0x0000000000594000-memory.dmp
memory/3288-193-0x0000000000885000-0x0000000000917000-memory.dmp
memory/3924-278-0x0000000000AF0000-0x0000000000AF7000-memory.dmp
memory/3924-267-0x0000000000AE0000-0x0000000000AED000-memory.dmp
memory/3924-266-0x0000000000AF0000-0x0000000000AF7000-memory.dmp
memory/3936-175-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3936-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3936-140-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3936-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3936-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4184-263-0x0000000000FC0000-0x0000000000FC6000-memory.dmp
memory/4184-264-0x0000000000FB0000-0x0000000000FBB000-memory.dmp
memory/4184-277-0x0000000000FC0000-0x0000000000FC6000-memory.dmp
memory/4212-254-0x0000000000EA0000-0x0000000000EA6000-memory.dmp
memory/4212-274-0x0000000000EA0000-0x0000000000EA6000-memory.dmp
memory/4212-255-0x0000000000E90000-0x0000000000E9C000-memory.dmp
memory/4220-166-0x0000000140000000-0x000000014060E000-memory.dmp
memory/4232-181-0x0000000140000000-0x000000014060E000-memory.dmp
memory/4328-205-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4328-239-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4328-216-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4328-211-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4328-209-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4556-236-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4556-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4556-192-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4556-194-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4744-134-0x0000000000400000-0x0000000000594000-memory.dmp
memory/4744-132-0x00000000007A3000-0x00000000007B3000-memory.dmp
memory/4744-135-0x0000000000400000-0x0000000000594000-memory.dmp
memory/4744-133-0x00000000001F0000-0x00000000001F9000-memory.dmp
memory/4764-269-0x0000000000FC0000-0x0000000000FC8000-memory.dmp
memory/4764-270-0x0000000000FB0000-0x0000000000FBB000-memory.dmp
memory/4764-279-0x0000000000FC0000-0x0000000000FC8000-memory.dmp
memory/4828-172-0x0000000000400000-0x0000000000594000-memory.dmp
memory/4828-171-0x0000000000773000-0x0000000000784000-memory.dmp