Analysis
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max time kernel
76s -
max time network
175s -
platform
windows10-1703_x64 -
resource
win10-20220901-en -
resource tags
arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system -
submitted
20-09-2022 14:08
Static task
static1
Behavioral task
behavioral1
Sample
568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe
Resource
win10-20220901-en
General
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Target
568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe
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Size
726KB
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MD5
57980107cda4583ed5de831ce2d7c601
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SHA1
80505c968fe7f78538697b474f077068b61c2686
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SHA256
568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff
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SHA512
2c3a53ff5eb2b9a1dad87d3bda4367016b85737df6fbc070c50142ae18aa3725d973c6e1781bed17244993d82805e5592caf3fb7651b59683918488ca0fa477e
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SSDEEP
12288:tyYg+bUBFZvurA4KNc1yaVOOE7QoY1+7QzAzL0UuqOlUK+WX+VvUWfh74yw9:kYUB3vEktOEDwO+kL0UYsWu7h74l9
Malware Config
Extracted
djvu
http://acacaca.org/test1/get.php
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extension
.mmpu
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offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 8 IoCs
resource yara_rule behavioral2/memory/3316-141-0x0000000004AD0000-0x0000000004BEB000-memory.dmp family_djvu behavioral2/memory/3276-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3276-148-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/3276-154-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3276-206-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3276-247-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4768-275-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/4768-320-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 4 IoCs
pid Process 4868 build2.exe 540 build2.exe 2860 build3.exe 4508 mstsca.exe -
Loads dropped DLL 2 IoCs
pid Process 540 build2.exe 540 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3468 icacls.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2368682536-4045190062-1465778271-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\acc2c074-16ec-4731-865b-66d30b2d4210\\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe\" --AutoStart" 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.2ip.ua 2 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 3316 set thread context of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 4244 set thread context of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4868 set thread context of 540 4868 build2.exe 72 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4976 schtasks.exe 4092 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 4556 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 3580 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 540 build2.exe 540 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3580 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3316 wrote to memory of 3276 3316 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 66 PID 3276 wrote to memory of 3468 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 67 PID 3276 wrote to memory of 3468 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 67 PID 3276 wrote to memory of 3468 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 67 PID 3276 wrote to memory of 4244 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 68 PID 3276 wrote to memory of 4244 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 68 PID 3276 wrote to memory of 4244 3276 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 68 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4244 wrote to memory of 4768 4244 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 70 PID 4768 wrote to memory of 4868 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 71 PID 4768 wrote to memory of 4868 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 71 PID 4768 wrote to memory of 4868 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 71 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4868 wrote to memory of 540 4868 build2.exe 72 PID 4768 wrote to memory of 2860 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 73 PID 4768 wrote to memory of 2860 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 73 PID 4768 wrote to memory of 2860 4768 568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe 73 PID 2860 wrote to memory of 4976 2860 build3.exe 74 PID 2860 wrote to memory of 4976 2860 build3.exe 74 PID 2860 wrote to memory of 4976 2860 build3.exe 74 PID 540 wrote to memory of 4144 540 build2.exe 76 PID 540 wrote to memory of 4144 540 build2.exe 76 PID 540 wrote to memory of 4144 540 build2.exe 76 PID 4144 wrote to memory of 3580 4144 cmd.exe 78 PID 4144 wrote to memory of 3580 4144 cmd.exe 78 PID 4144 wrote to memory of 3580 4144 cmd.exe 78 PID 4144 wrote to memory of 4556 4144 cmd.exe 80 PID 4144 wrote to memory of 4556 4144 cmd.exe 80 PID 4144 wrote to memory of 4556 4144 cmd.exe 80 PID 4508 wrote to memory of 4092 4508 mstsca.exe 82 PID 4508 wrote to memory of 4092 4508 mstsca.exe 82 PID 4508 wrote to memory of 4092 4508 mstsca.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe"C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3316 -
C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe"C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3276 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\acc2c074-16ec-4731-865b-66d30b2d4210" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3468
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C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe"C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4244 -
C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe"C:\Users\Admin\AppData\Local\Temp\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4768 -
C:\Users\Admin\AppData\Local\d354b059-13f7-470a-b5f1-888ecd5b6003\build2.exe"C:\Users\Admin\AppData\Local\d354b059-13f7-470a-b5f1-888ecd5b6003\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4868 -
C:\Users\Admin\AppData\Local\d354b059-13f7-470a-b5f1-888ecd5b6003\build2.exe"C:\Users\Admin\AppData\Local\d354b059-13f7-470a-b5f1-888ecd5b6003\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:540 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" Ú/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\d354b059-13f7-470a-b5f1-888ecd5b6003\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:4144 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3580
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:4556
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C:\Users\Admin\AppData\Local\d354b059-13f7-470a-b5f1-888ecd5b6003\build3.exe"C:\Users\Admin\AppData\Local\d354b059-13f7-470a-b5f1-888ecd5b6003\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2860 -
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)
PID:4976
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4508 -
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)
PID:4092
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\acc2c074-16ec-4731-865b-66d30b2d4210\568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff.exe
Filesize726KB
MD557980107cda4583ed5de831ce2d7c601
SHA180505c968fe7f78538697b474f077068b61c2686
SHA256568398e3f28bba94ddfac917c81c5e02ed4d46de2af1eef95845704c5c0875ff
SHA5122c3a53ff5eb2b9a1dad87d3bda4367016b85737df6fbc070c50142ae18aa3725d973c6e1781bed17244993d82805e5592caf3fb7651b59683918488ca0fa477e
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571