Analysis
- max time kernel
224s - max time network
220s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
08/12/2022, 21:07
General
- Target 5fe360ad2cee05f733d4ba0b07121348383331bb7abae701697fd5a3a4c732da.exe
- Size 241KB
- Sample221208-zyj7tsbe76
- SHA256 5fe360ad2cee05f733d4ba0b07121348383331bb7abae701697fd5a3a4c732da
Malware Config
Extracted
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djvu
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http://abibiall.com/lancer/get.php
-
extension
.mbtf
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offline_id
d1BN9KEra4Hetg5GUH0nQZqy14sntD2NbihzGQt1
-
payload_url
http://uaery.top/dl/build2.exe
http://abibiall.com/files/1/build3.exe
-
ransomnote
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Extracted
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vidar
-
56.1
-
517
-
https://t.me/dishasta
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https://steamcommunity.com/profiles/76561199441933804
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profile_id
517
Signatures
- Detected Djvu ransomware 10 IoCs
- Detects Smokeloader packer 1 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 9 IoCs
- Checks computer location settings 2 TTPs 2 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 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtSetInformationThreadHideFromDebugger 7 IoCs
- 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 1 IoCs
- 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.
- Modifies system certificate store 2 TTPs 2 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 5 IoCs
- Suspicious use of AdjustPrivilegeToken 13 IoCs
- Suspicious use of WriteProcessMemory 60 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\5fe360ad2cee05f733d4ba0b07121348383331bb7abae701697fd5a3a4c732da.exe"C:\Users\Admin\AppData\Local\Temp\5fe360ad2cee05f733d4ba0b07121348383331bb7abae701697fd5a3a4c732da.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
-
C:\Users\Admin\AppData\Local\Temp\392C.exeC:\Users\Admin\AppData\Local\Temp\392C.exe1⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\51A6.exeC:\Users\Admin\AppData\Local\Temp\51A6.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\51A6.exeC:\Users\Admin\AppData\Local\Temp\51A6.exe2⤵
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\048547a4-3bc7-4215-ab9d-836328dbc363" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
-
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C:\Users\Admin\AppData\Local\Temp\51A6.exe"C:\Users\Admin\AppData\Local\Temp\51A6.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\51A6.exe"C:\Users\Admin\AppData\Local\Temp\51A6.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\c07b3cc0-c66f-45a3-b48e-ca351ce47926\build2.exe"C:\Users\Admin\AppData\Local\c07b3cc0-c66f-45a3-b48e-ca351ce47926\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\c07b3cc0-c66f-45a3-b48e-ca351ce47926\build2.exe"C:\Users\Admin\AppData\Local\c07b3cc0-c66f-45a3-b48e-ca351ce47926\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2104 -s 6567⤵
- Program crash
-
-
-
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C:\Users\Admin\AppData\Local\c07b3cc0-c66f-45a3-b48e-ca351ce47926\build3.exe"C:\Users\Admin\AppData\Local\c07b3cc0-c66f-45a3-b48e-ca351ce47926\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⤵
- Creates scheduled task(s)
-
-
-
-
-
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
- Accesses Microsoft Outlook profiles
- outlook_office_path
- outlook_win_path
-
C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2104 -ip 21041⤵
-
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- 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"2⤵
- 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
51A6.exe
392C.exe
392C.exe
51A6.exe
51A6.exe
51A6.exe
51A6.exe
51A6.exe
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
mstsca.exe
mstsca.exe
memory/1144-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1144-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1144-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1144-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1144-162-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1512-157-0x0000000000D40000-0x0000000000DAB000-memory.dmp
memory/1512-146-0x0000000000D40000-0x0000000000DAB000-memory.dmp
memory/1512-145-0x0000000001000000-0x0000000001075000-memory.dmp
memory/1732-144-0x0000000004F80000-0x0000000005012000-memory.dmp
memory/1732-143-0x0000000000080000-0x0000000000244000-memory.dmp
memory/1892-188-0x0000000000550000-0x000000000059B000-memory.dmp
memory/1892-187-0x0000000000715000-0x0000000000742000-memory.dmp
memory/2084-149-0x0000000000140000-0x000000000014C000-memory.dmp
memory/2104-183-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2104-192-0x0000000060900000-0x0000000060992000-memory.dmp
memory/2104-191-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2104-189-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2104-186-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2104-185-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2104-216-0x0000000000400000-0x000000000045F000-memory.dmp
memory/3328-133-0x00000000001F0000-0x00000000001F9000-memory.dmp
memory/3328-134-0x0000000000400000-0x0000000000459000-memory.dmp
memory/3328-132-0x00000000006D2000-0x00000000006E2000-memory.dmp
memory/3328-135-0x0000000000400000-0x0000000000459000-memory.dmp
memory/3640-166-0x00000000007D9000-0x000000000086B000-memory.dmp
memory/3844-167-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3844-168-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3844-190-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3844-174-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4344-154-0x0000000002210000-0x000000000232B000-memory.dmp
memory/4344-153-0x000000000077C000-0x000000000080E000-memory.dmp