Analysis
- max time kernel
138s - max time network
133s - platform
windows10_x64 - resource
win10v20210408 - submitted
04/09/2021, 06:17
Static task
static1
Behavioral task
behavioral1
Sample
0fbd60e2b0253dddc32ef110d0cd71d4.exe
Resource
win7-en
Behavioral task
behavioral2
Sample
0fbd60e2b0253dddc32ef110d0cd71d4.exe
Resource
win10v20210408
General
- Target 0fbd60e2b0253dddc32ef110d0cd71d4.exe
- Size 838KB
- Sample210904-g12wjsdhf4
- SHA256 9a9f3b0dbf3655264bdabd0e02127d74b341522c669d3eb11b22b2e2da97867f
- MD5 0fbd60e2b0253dddc32ef110d0cd71d4
- SHA1 692426e3ca291705a201c3e91067aeb681a49818
- SHA512 45f962579cc023cb40c29c0ae2ea9e0c7b8cd0a712caa05b7e3a98c4c112e46138e78451bc994fc81585d7763d26e06b14dc31b10994a01432fd9fb731e58315
- 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/3372-114-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-115-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/528-116-0x0000000004140000-0x000000000425B000-memory.dmp family_djvu behavioral2/memory/3372-117-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3460-122-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/3460-127-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Vidar Stealer 7 IoCs
resource yara_rule behavioral2/memory/3260-131-0x0000000000400000-0x00000000004D7000-memory.dmp family_vidar behavioral2/memory/3260-132-0x000000000049ECBD-mapping.dmp family_vidar behavioral2/memory/3096-134-0x00000000047B0000-0x0000000004883000-memory.dmp family_vidar behavioral2/memory/3260-135-0x0000000000400000-0x00000000004D7000-memory.dmp family_vidar behavioral2/memory/2740-145-0x00000000032A0000-0x00000000033EA000-memory.dmp family_vidar behavioral2/memory/1188-162-0x0000000003250000-0x00000000032FE000-memory.dmp family_vidar behavioral2/memory/2908-167-0x0000000003250000-0x000000000339A000-memory.dmp family_vidar - Downloads MZ/PE file
- Executes dropped EXE 8 IoCs
pid Process 3096 build2.exe 3260 build2.exe 2740 build3.exe 3208 build3.exe 1188 mstsca.exe 4092 mstsca.exe 2908 mstsca.exe 820 mstsca.exe - Loads dropped DLL 2 IoCs
pid Process 3260 build2.exe 3260 build2.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 2060 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\\9801a31c-a1b2-4ce4-b20a-920a01d5826f\\0fbd60e2b0253dddc32ef110d0cd71d4.exe\" --AutoStart" 0fbd60e2b0253dddc32ef110d0cd71d4.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 22 api.2ip.ua - Suspicious use of SetThreadContext 6 IoCs
description pid Process procid_target PID 528 set thread context of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 1340 set thread context of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 3096 set thread context of 3260 3096 build2.exe 84 PID 2740 set thread context of 3208 2740 build3.exe 86 PID 1188 set thread context of 4092 1188 mstsca.exe 94 PID 2908 set thread context of 820 2908 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 2220 schtasks.exe 704 schtasks.exe - Delays execution with timeout.exe 1 IoCs
pid Process 508 timeout.exe - Kills process with taskkill 1 IoCs
pid Process 188 taskkill.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 0fbd60e2b0253dddc32ef110d0cd71d4.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 0fbd60e2b0253dddc32ef110d0cd71d4.exe - Suspicious behavior: EnumeratesProcesses 12 IoCs
pid Process 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 3260 build2.exe 3260 build2.exe 3260 build2.exe 3260 build2.exe 3260 build2.exe 3260 build2.exe 3260 build2.exe 3260 build2.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 188 taskkill.exe - Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 528 wrote to memory of 3372 528 0fbd60e2b0253dddc32ef110d0cd71d4.exe 77 PID 3372 wrote to memory of 2060 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 78 PID 3372 wrote to memory of 2060 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 78 PID 3372 wrote to memory of 2060 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 78 PID 3372 wrote to memory of 1340 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 79 PID 3372 wrote to memory of 1340 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 79 PID 3372 wrote to memory of 1340 3372 0fbd60e2b0253dddc32ef110d0cd71d4.exe 79 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 1340 wrote to memory of 3460 1340 0fbd60e2b0253dddc32ef110d0cd71d4.exe 82 PID 3460 wrote to memory of 3096 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 83 PID 3460 wrote to memory of 3096 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 83 PID 3460 wrote to memory of 3096 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 83 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3096 wrote to memory of 3260 3096 build2.exe 84 PID 3460 wrote to memory of 2740 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 85 PID 3460 wrote to memory of 2740 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 85 PID 3460 wrote to memory of 2740 3460 0fbd60e2b0253dddc32ef110d0cd71d4.exe 85 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 2740 wrote to memory of 3208 2740 build3.exe 86 PID 3208 wrote to memory of 2220 3208 build3.exe 87 PID 3208 wrote to memory of 2220 3208 build3.exe 87 PID 3208 wrote to memory of 2220 3208 build3.exe 87 PID 3260 wrote to memory of 184 3260 build2.exe 89 PID 3260 wrote to memory of 184 3260 build2.exe 89 PID 3260 wrote to memory of 184 3260 build2.exe 89 PID 184 wrote to memory of 188 184 cmd.exe 91 PID 184 wrote to memory of 188 184 cmd.exe 91 PID 184 wrote to memory of 188 184 cmd.exe 91 PID 184 wrote to memory of 508 184 cmd.exe 92 PID 184 wrote to memory of 508 184 cmd.exe 92 PID 184 wrote to memory of 508 184 cmd.exe 92 PID 1188 wrote to memory of 4092 1188 mstsca.exe 94 PID 1188 wrote to memory of 4092 1188 mstsca.exe 94 PID 1188 wrote to memory of 4092 1188 mstsca.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe"C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:528 -
C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe"C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe"2⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3372 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\9801a31c-a1b2-4ce4-b20a-920a01d5826f" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2060
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C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe"C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1340 -
C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe"C:\Users\Admin\AppData\Local\Temp\0fbd60e2b0253dddc32ef110d0cd71d4.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3460 -
C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build2.exe"C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3096 -
C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build2.exe"C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3260 -
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\c105b0c6-89d6-41ae-a250-7d735baf7970\build2.exe" & del C:\ProgramData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:184 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:188
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:508
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C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build3.exe"C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2740 -
C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build3.exe"C:\Users\Admin\AppData\Local\c105b0c6-89d6-41ae-a250-7d735baf7970\build3.exe"6⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3208 -
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:2220
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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:1188 -
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe2⤵
- Executes dropped EXE
PID:4092 -
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:704
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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:2908 -
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe2⤵
- Executes dropped EXE
PID:820
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