Analysis
- max time kernel
153s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
03/10/2022, 10:31
General
- Target file.exe
- Size 145KB
- Sample221003-mkcvdagae5
- SHA256 bb03c84fc5ee756da865ec7235053935f555802ea3416f3fa81fbd0408d2f09c
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
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extension
.adww
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offline_id
z8lhl4oForVEc7gy9Ra8rSqjYMl3xiFRuIW4not1
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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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raccoon
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1a17d9aed7a239440deb75d7a177f406
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http://193.38.55.180/
Extracted
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vidar
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54.7
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517
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https://t.me/trampapanam
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https://nerdculture.de/@yoxhyp
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profile_id
517
Signatures
- DcRat 4 IoCs
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
- Detected Djvu ransomware 9 IoCs
- Detects Smokeloader packer 1 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Raccoon
Raccoon is an infostealer written in C++ and first seen in 2019.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 10 IoCs
- Checks computer location settings 2 TTPs 2 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 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 4 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks SCSI registry key(s) 3 TTPs 3 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 5 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⤵
- DcRat
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\DE8D.exeC:\Users\Admin\AppData\Local\Temp\DE8D.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\DE8D.exeC:\Users\Admin\AppData\Local\Temp\DE8D.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\962e55c4-c7cc-46cc-8a8b-23e2d7a5b093" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\DE8D.exe"C:\Users\Admin\AppData\Local\Temp\DE8D.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\DE8D.exe"C:\Users\Admin\AppData\Local\Temp\DE8D.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
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C:\Users\Admin\AppData\Local\703e4c3f-345d-4bcf-b185-20fac11bd8c8\build2.exe"C:\Users\Admin\AppData\Local\703e4c3f-345d-4bcf-b185-20fac11bd8c8\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Users\Admin\AppData\Local\703e4c3f-345d-4bcf-b185-20fac11bd8c8\build2.exe"C:\Users\Admin\AppData\Local\703e4c3f-345d-4bcf-b185-20fac11bd8c8\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
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-
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C:\Users\Admin\AppData\Local\703e4c3f-345d-4bcf-b185-20fac11bd8c8\build3.exe"C:\Users\Admin\AppData\Local\703e4c3f-345d-4bcf-b185-20fac11bd8c8\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⤵
- DcRat
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\E0F0.exeC:\Users\Admin\AppData\Local\Temp\E0F0.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"2⤵
- Loads dropped DLL
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C:\Users\Admin\AppData\Local\Temp\E575.exeC:\Users\Admin\AppData\Local\Temp\E575.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.execmd /C "wmic path win32_VideoController get name"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic path win32_VideoController get name3⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.execmd /C "wmic cpu get name"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic cpu get name3⤵
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\E7A8.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\E7A8.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⤵
- DcRat
- 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
mozglue.dll
nss3.dll
sqlite3.dll
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
DE8D.exe
DE8D.exe
DE8D.exe
DE8D.exe
DE8D.exe
DE8D.exe
E0F0.exe
E0F0.exe
E575.exe
E575.exe
E7A8.dll
E7A8.dll
mstsca.exe
mstsca.exe
memory/396-134-0x0000000000400000-0x0000000000580000-memory.dmp
memory/396-135-0x000000000069D000-0x00000000006AE000-memory.dmp
memory/396-133-0x00000000005F0000-0x00000000005F9000-memory.dmp
memory/396-136-0x0000000000400000-0x0000000000580000-memory.dmp
memory/396-132-0x000000000069D000-0x00000000006AE000-memory.dmp
memory/1168-218-0x0000000000400000-0x000000000045B000-memory.dmp
memory/1168-217-0x0000000000400000-0x000000000045B000-memory.dmp
memory/1168-242-0x0000000000400000-0x000000000045B000-memory.dmp
memory/1168-219-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1168-215-0x0000000000400000-0x000000000045B000-memory.dmp
memory/1168-212-0x0000000000400000-0x000000000045B000-memory.dmp
memory/2892-189-0x00000000022BD000-0x000000000234F000-memory.dmp
memory/4228-216-0x0000000000830000-0x0000000000877000-memory.dmp
memory/4228-214-0x000000000058E000-0x00000000005B7000-memory.dmp
memory/4496-198-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4496-188-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4496-190-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4788-153-0x00000000022F0000-0x000000000240B000-memory.dmp
memory/4788-151-0x0000000002219000-0x00000000022AB000-memory.dmp
memory/25348-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/25348-183-0x0000000000400000-0x0000000000537000-memory.dmp
memory/25348-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/25348-158-0x0000000000400000-0x0000000000537000-memory.dmp
memory/25348-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/33828-199-0x0000000002DA0000-0x0000000002E49000-memory.dmp
memory/33828-197-0x0000000002CA0000-0x0000000002DA0000-memory.dmp
memory/33828-196-0x0000000002A90000-0x0000000002B94000-memory.dmp
memory/33828-195-0x00000000028A0000-0x000000000295E000-memory.dmp
memory/34756-167-0x00000000004E0000-0x000000000054B000-memory.dmp
memory/34756-160-0x00000000004E0000-0x000000000054B000-memory.dmp
memory/34756-159-0x0000000000550000-0x00000000005C5000-memory.dmp
memory/56284-162-0x00000000009B0000-0x00000000009BC000-memory.dmp
memory/84820-165-0x0000000000530000-0x0000000000544000-memory.dmp
memory/84820-174-0x0000000000530000-0x0000000000544000-memory.dmp