Analysis
- max time kernel
144s - max time network
152s - platform
windows10_x64 - resource
win10v20210408 - submitted
06/09/2021, 06:40
Static task
static1
Behavioral task
behavioral1
Sample
27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe
Resource
win7-en
Behavioral task
behavioral2
Sample
27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe
Resource
win10v20210408
General
- Target 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe
- Size 790KB
- Sample210906-he9vpsdfhq
- SHA256 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f
- MD5 ed54238d8c762aa3d738d14fe62d13b5
- SHA1 e44c2a7365a57dcb24c45d25113cb99c94d50d78
- SHA512 25a7b3c4d8e3093989d74865627e09ab12d256db894b0553e91eec9edac41a97861419d3f11ebe45ba1311c5b7abc9feb2e56ec9e9199db0cff74a52ec2054fe
- MD5 SHA1 SHA512
Malware Config
Extracted
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vidar
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40.4
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517
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https://romkaxarit.tumblr.com/
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profile_id
517
Signatures
- Detected Djvu ransomeware 6 IoCs
resource yara_rule behavioral2/memory/656-114-0x0000000002570000-0x000000000268B000-memory.dmp family_djvu behavioral2/memory/3856-116-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/3856-115-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3856-117-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3908-122-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/3908-127-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
- Vidar Stealer 4 IoCs
resource yara_rule behavioral2/memory/3576-131-0x0000000000400000-0x00000000004D7000-memory.dmp family_vidar behavioral2/memory/3576-132-0x000000000049ECBD-mapping.dmp family_vidar behavioral2/memory/2256-134-0x0000000004880000-0x0000000004953000-memory.dmp family_vidar behavioral2/memory/3576-135-0x0000000000400000-0x00000000004D7000-memory.dmp family_vidar - Downloads MZ/PE file
- Executes dropped EXE 8 IoCs
pid Process 2256 build2.exe 3576 build2.exe 3920 build3.exe 3268 build3.exe 476 mstsca.exe 1168 mstsca.exe 2112 mstsca.exe 2072 mstsca.exe - Loads dropped DLL 2 IoCs
pid Process 3576 build2.exe 3576 build2.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 2808 icacls.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4f72697b-6cef-407e-8361-10ace80d0bf0\\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe\" --AutoStart" 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe - 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.
flow ioc 11 api.2ip.ua 12 api.2ip.ua 19 api.2ip.ua - Suspicious use of SetThreadContext 6 IoCs
description pid Process procid_target PID 656 set thread context of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 2720 set thread context of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2256 set thread context of 3576 2256 build2.exe 82 PID 3920 set thread context of 3268 3920 build3.exe 85 PID 476 set thread context of 1168 476 mstsca.exe 94 PID 2112 set thread context of 2072 2112 mstsca.exe 98 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- 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 1112 schtasks.exe 4080 schtasks.exe - Delays execution with timeout.exe 1 IoCs
pid Process 2012 timeout.exe - Kills process with taskkill 1 IoCs
pid Process 3104 taskkill.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe - Suspicious behavior: EnumeratesProcesses 12 IoCs
pid Process 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 3576 build2.exe 3576 build2.exe 3576 build2.exe 3576 build2.exe 3576 build2.exe 3576 build2.exe 3576 build2.exe 3576 build2.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3104 taskkill.exe - Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 656 wrote to memory of 3856 656 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 73 PID 3856 wrote to memory of 2808 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 75 PID 3856 wrote to memory of 2808 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 75 PID 3856 wrote to memory of 2808 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 75 PID 3856 wrote to memory of 2720 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 76 PID 3856 wrote to memory of 2720 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 76 PID 3856 wrote to memory of 2720 3856 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 76 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 2720 wrote to memory of 3908 2720 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 78 PID 3908 wrote to memory of 2256 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 81 PID 3908 wrote to memory of 2256 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 81 PID 3908 wrote to memory of 2256 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 81 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 2256 wrote to memory of 3576 2256 build2.exe 82 PID 3908 wrote to memory of 3920 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 84 PID 3908 wrote to memory of 3920 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 84 PID 3908 wrote to memory of 3920 3908 27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe 84 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3920 wrote to memory of 3268 3920 build3.exe 85 PID 3268 wrote to memory of 1112 3268 build3.exe 86 PID 3268 wrote to memory of 1112 3268 build3.exe 86 PID 3268 wrote to memory of 1112 3268 build3.exe 86 PID 3576 wrote to memory of 4056 3576 build2.exe 88 PID 3576 wrote to memory of 4056 3576 build2.exe 88 PID 3576 wrote to memory of 4056 3576 build2.exe 88 PID 4056 wrote to memory of 3104 4056 cmd.exe 90 PID 4056 wrote to memory of 3104 4056 cmd.exe 90 PID 4056 wrote to memory of 3104 4056 cmd.exe 90 PID 4056 wrote to memory of 2012 4056 cmd.exe 92 PID 4056 wrote to memory of 2012 4056 cmd.exe 92 PID 4056 wrote to memory of 2012 4056 cmd.exe 92 PID 476 wrote to memory of 1168 476 mstsca.exe 94 PID 476 wrote to memory of 1168 476 mstsca.exe 94 PID 476 wrote to memory of 1168 476 mstsca.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe"C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:656 -
C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe"C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe"2⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3856 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\4f72697b-6cef-407e-8361-10ace80d0bf0" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2808
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C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe"C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2720 -
C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe"C:\Users\Admin\AppData\Local\Temp\27e60038e1d8c7a418a277378feb45cb034fd285d14b5bf638acb367cea4cf5f.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3908 -
C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build2.exe"C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2256 -
C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build2.exe"C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3576 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build2.exe" & del C:\ProgramData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:4056 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3104
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:2012
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C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build3.exe"C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3920 -
C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build3.exe"C:\Users\Admin\AppData\Local\d313663c-90f7-40d9-9516-4241279ed828\build3.exe"6⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3268 -
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"7⤵
- Creates scheduled task(s)
PID:1112
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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 SetThreadContext
- Suspicious use of WriteProcessMemory
PID:476 -
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe2⤵
- Executes dropped EXE
PID:1168 -
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"3⤵
- Creates scheduled task(s)
PID:4080
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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 SetThreadContext
PID:2112 -
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe2⤵
- Executes dropped EXE
PID:2072
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