Analysis
- max time kernel
152s - max time network
157s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
04/10/2022, 19:31
General
- Target file.exe
- Size 265KB
- Sample221004-x8c56acca3
- SHA256 862f2ac9073c5b8064a02ab8c65ab5c7eba7634fa9d4a36c5171df488f2aedf5
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
-
extension
.adww
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offline_id
z8lhl4oForVEc7gy9Ra8rSqjYMl3xiFRuIW4not1
-
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
-
54.9
-
517
-
https://t.me/larsenup
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https://ioc.exchange/@zebra54
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profile_id
517
Extracted
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vidar
-
54.9
-
1703
-
https://t.me/larsenup
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https://ioc.exchange/@zebra54
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profile_id
1703
Signatures
- Detected Djvu ransomware 11 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.
- Downloads MZ/PE file
- Executes dropped EXE 14 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 4 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.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- 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 5 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.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 24 IoCs
- Suspicious use of AdjustPrivilegeToken 43 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\6CD3.exeC:\Users\Admin\AppData\Local\Temp\6CD3.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\6CD3.exeC:\Users\Admin\AppData\Local\Temp\6CD3.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\4af6e91e-6a65-477b-8d89-775cde80b0a6" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
-
-
C:\Users\Admin\AppData\Local\Temp\6CD3.exe"C:\Users\Admin\AppData\Local\Temp\6CD3.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\6CD3.exe"C:\Users\Admin\AppData\Local\Temp\6CD3.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\20c5176b-a7b5-47ad-9833-3d3c54c52bd3\build2.exe"C:\Users\Admin\AppData\Local\20c5176b-a7b5-47ad-9833-3d3c54c52bd3\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\20c5176b-a7b5-47ad-9833-3d3c54c52bd3\build2.exe"C:\Users\Admin\AppData\Local\20c5176b-a7b5-47ad-9833-3d3c54c52bd3\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
-
-
-
C:\Users\Admin\AppData\Local\20c5176b-a7b5-47ad-9833-3d3c54c52bd3\build3.exe"C:\Users\Admin\AppData\Local\20c5176b-a7b5-47ad-9833-3d3c54c52bd3\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:\Users\Admin\AppData\Local\Temp\7224.exeC:\Users\Admin\AppData\Local\Temp\7224.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4576 -s 5402⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4576 -s 5442⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4576 -s 5562⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4576 -s 6122⤵
- Program crash
-
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\74D4.dll1⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\74D4.dll2⤵
- Loads dropped DLL
-
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C:\Users\Admin\AppData\Local\Temp\7727.exeC:\Users\Admin\AppData\Local\Temp\7727.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
-
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:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4576 -ip 45761⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 4576 -ip 45761⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 4576 -ip 45761⤵
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C:\Users\Admin\AppData\Local\Temp\F560.exeC:\Users\Admin\AppData\Local\Temp\F560.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\FAE0.exeC:\Users\Admin\AppData\Local\Temp\FAE0.exe1⤵
- Executes dropped EXE
-
C:\Users\Admin\AppData\Local\Temp\9F4.exeC:\Users\Admin\AppData\Local\Temp\9F4.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 24442⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\133C.exeC:\Users\Admin\AppData\Local\Temp\133C.exe1⤵
- Executes dropped EXE
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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\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4576 -ip 45761⤵
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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⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4240 -ip 42401⤵
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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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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
6CD3.exe
133C.exe
133C.exe
6CD3.exe
6CD3.exe
6CD3.exe
6CD3.exe
6CD3.exe
7224.exe
7224.exe
74D4.dll
74D4.dll
74D4.dll
7727.exe
7727.exe
9F4.exe
9F4.exe
F560.exe
F560.exe
FAE0.exe
FAE0.exe
mstsca.exe
mstsca.exe
memory/480-190-0x0000000000400000-0x0000000000537000-memory.dmp
memory/480-188-0x0000000000400000-0x0000000000537000-memory.dmp
memory/480-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/480-238-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1716-256-0x0000000000770000-0x0000000000779000-memory.dmp
memory/1716-257-0x0000000000760000-0x000000000076F000-memory.dmp
memory/2108-277-0x00000000009B0000-0x00000000009B5000-memory.dmp
memory/2108-278-0x00000000009A0000-0x00000000009A9000-memory.dmp
memory/2192-158-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2192-164-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2192-176-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2192-173-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2192-159-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2192-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2284-260-0x00000000009B0000-0x00000000009B5000-memory.dmp
memory/2284-261-0x00000000009A0000-0x00000000009A9000-memory.dmp
memory/2532-284-0x0000000000BC0000-0x0000000000BCD000-memory.dmp
memory/2532-283-0x0000000000BD0000-0x0000000000BD7000-memory.dmp
memory/2672-217-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2672-208-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2672-218-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2672-211-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2672-273-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2784-264-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2784-263-0x00000000006F0000-0x0000000000739000-memory.dmp
memory/2784-262-0x00000000007BC000-0x00000000007E7000-memory.dmp
memory/3136-269-0x0000000000C30000-0x0000000000C36000-memory.dmp
memory/3136-270-0x0000000000C20000-0x0000000000C2C000-memory.dmp
memory/3500-180-0x0000000002F70000-0x000000000302D000-memory.dmp
memory/3500-172-0x0000000002E40000-0x0000000002F69000-memory.dmp
memory/3500-171-0x0000000002BE0000-0x0000000002D0E000-memory.dmp
memory/3500-182-0x0000000003030000-0x00000000030D9000-memory.dmp
memory/3500-181-0x0000000003030000-0x00000000030D9000-memory.dmp
memory/3500-148-0x00000000023B0000-0x000000000257A000-memory.dmp
memory/3500-184-0x0000000002E40000-0x0000000002F69000-memory.dmp
memory/3568-281-0x00000000009A0000-0x00000000009AB000-memory.dmp
memory/3568-280-0x00000000009B0000-0x00000000009B6000-memory.dmp
memory/3780-132-0x00000000006FC000-0x000000000070D000-memory.dmp
memory/3780-136-0x0000000000400000-0x0000000000448000-memory.dmp
memory/3780-135-0x00000000006FC000-0x000000000070D000-memory.dmp
memory/3780-134-0x0000000000400000-0x0000000000448000-memory.dmp
memory/3780-133-0x0000000002180000-0x0000000002189000-memory.dmp
memory/3888-274-0x0000000000C30000-0x0000000000C52000-memory.dmp
memory/3888-275-0x0000000000C00000-0x0000000000C27000-memory.dmp
memory/4180-166-0x000000000055B000-0x000000000056C000-memory.dmp
memory/4180-170-0x0000000000400000-0x0000000000448000-memory.dmp
memory/4180-168-0x0000000000400000-0x0000000000448000-memory.dmp
memory/4180-167-0x0000000000520000-0x0000000000529000-memory.dmp
memory/4184-154-0x0000000002260000-0x000000000237B000-memory.dmp
memory/4184-153-0x00000000020C4000-0x0000000002155000-memory.dmp
memory/4240-287-0x0000000007980000-0x000000000799E000-memory.dmp
memory/4240-254-0x0000000004C80000-0x0000000004C92000-memory.dmp
memory/4240-258-0x00000000059D0000-0x0000000005A0C000-memory.dmp
memory/4240-249-0x0000000000400000-0x000000000059A000-memory.dmp
memory/4240-247-0x00000000021B0000-0x00000000021E7000-memory.dmp
memory/4240-286-0x00000000078B0000-0x0000000007926000-memory.dmp
memory/4240-246-0x00000000007ED000-0x0000000000817000-memory.dmp
memory/4240-255-0x00000000058C0000-0x00000000059CA000-memory.dmp
memory/4240-248-0x0000000004CF0000-0x0000000005294000-memory.dmp
memory/4240-266-0x0000000006800000-0x0000000006866000-memory.dmp
memory/4240-267-0x0000000006B20000-0x0000000006BB2000-memory.dmp
memory/4240-268-0x0000000006C00000-0x0000000006DC2000-memory.dmp
memory/4240-253-0x00000000052A0000-0x00000000058B8000-memory.dmp
memory/4240-271-0x0000000006DD0000-0x00000000072FC000-memory.dmp
memory/4520-161-0x0000000000FF0000-0x0000000000FFC000-memory.dmp
memory/4576-202-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/4576-178-0x0000000002F60000-0x00000000033A7000-memory.dmp
memory/4576-179-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/4664-189-0x0000000001FC2000-0x0000000002053000-memory.dmp
memory/4888-250-0x00000000009B0000-0x00000000009B7000-memory.dmp
memory/4888-251-0x00000000009A0000-0x00000000009AB000-memory.dmp
memory/4968-163-0x0000000000C00000-0x0000000000C6B000-memory.dmp
memory/4968-162-0x0000000000C70000-0x0000000000CE5000-memory.dmp
memory/4968-165-0x0000000000C00000-0x0000000000C6B000-memory.dmp
memory/5032-212-0x000000000067D000-0x00000000006A9000-memory.dmp
memory/5032-213-0x00000000021D0000-0x000000000221A000-memory.dmp