Analysis
- max time kernel
152s - max time network
170s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
03/10/2022, 17:02
General
- Target file.exe
- Size 145KB
- Sample221003-vj4kpsfhar
- SHA256 cc7de5dc2f322b69f0b347868da34319ad89a1339a132d188e6d00a06ee4cfd5
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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54.9
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517
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https://t.me/larsenup
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https://ioc.exchange/@zebra54
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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 10 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 9 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 7 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 20 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:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\92AB.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\92AB.dll2⤵
- Loads dropped DLL
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C:\Users\Admin\AppData\Local\Temp\9432.exeC:\Users\Admin\AppData\Local\Temp\9432.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\9432.exeC:\Users\Admin\AppData\Local\Temp\9432.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\4f7acb90-6d53-4829-a252-eb9c92b322bc" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
-
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C:\Users\Admin\AppData\Local\Temp\9432.exe"C:\Users\Admin\AppData\Local\Temp\9432.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\9432.exe"C:\Users\Admin\AppData\Local\Temp\9432.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\0a9309e9-b544-4a31-8f82-6a886feb51c9\build2.exe"C:\Users\Admin\AppData\Local\0a9309e9-b544-4a31-8f82-6a886feb51c9\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\0a9309e9-b544-4a31-8f82-6a886feb51c9\build2.exe"C:\Users\Admin\AppData\Local\0a9309e9-b544-4a31-8f82-6a886feb51c9\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
-
-
-
C:\Users\Admin\AppData\Local\0a9309e9-b544-4a31-8f82-6a886feb51c9\build3.exe"C:\Users\Admin\AppData\Local\0a9309e9-b544-4a31-8f82-6a886feb51c9\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\979E.exeC:\Users\Admin\AppData\Local\Temp\979E.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:\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
9432.exe
92AB.dll
92AB.dll
92AB.dll
9432.exe
9432.exe
9432.exe
9432.exe
9432.exe
979E.exe
979E.exe
mstsca.exe
mstsca.exe
memory/928-151-0x0000000000E00000-0x0000000000E6B000-memory.dmp
memory/928-162-0x0000000000E00000-0x0000000000E6B000-memory.dmp
memory/928-150-0x0000000001300000-0x0000000001375000-memory.dmp
memory/2108-208-0x00000000021A0000-0x00000000021EA000-memory.dmp
memory/2108-206-0x000000000069E000-0x00000000006CA000-memory.dmp
memory/2452-152-0x0000000002330000-0x000000000244B000-memory.dmp
memory/2452-157-0x0000000002298000-0x000000000232A000-memory.dmp
memory/3140-209-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3140-236-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3140-204-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3140-215-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/3140-214-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4648-181-0x00000000028F0000-0x0000000002999000-memory.dmp
memory/4648-142-0x00000000022C0000-0x0000000002408000-memory.dmp
memory/4648-175-0x0000000002520000-0x0000000002624000-memory.dmp
memory/4648-176-0x0000000002730000-0x0000000002830000-memory.dmp
memory/4648-179-0x0000000002830000-0x00000000028EE000-memory.dmp
memory/4648-185-0x0000000002730000-0x0000000002830000-memory.dmp
memory/4732-136-0x0000000000400000-0x0000000000581000-memory.dmp
memory/4732-133-0x0000000000730000-0x0000000000739000-memory.dmp
memory/4732-134-0x0000000000400000-0x0000000000581000-memory.dmp
memory/4732-135-0x000000000079D000-0x00000000007AE000-memory.dmp
memory/4732-132-0x000000000079D000-0x00000000007AE000-memory.dmp
memory/8056-158-0x0000000000400000-0x0000000000537000-memory.dmp
memory/8056-180-0x0000000000400000-0x0000000000537000-memory.dmp
memory/8056-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/8056-161-0x0000000000400000-0x0000000000537000-memory.dmp
memory/8056-154-0x0000000000400000-0x0000000000537000-memory.dmp
memory/13260-160-0x0000000001020000-0x000000000102C000-memory.dmp
memory/64788-199-0x0000000000400000-0x0000000000537000-memory.dmp
memory/64788-193-0x0000000000400000-0x0000000000537000-memory.dmp
memory/64788-190-0x0000000000400000-0x0000000000537000-memory.dmp
memory/64788-235-0x0000000000400000-0x0000000000537000-memory.dmp
memory/65304-172-0x0000000000590000-0x00000000005A4000-memory.dmp
memory/65304-165-0x0000000000590000-0x00000000005A4000-memory.dmp
memory/65436-192-0x0000000002284000-0x0000000002316000-memory.dmp