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Analysis
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max time kernel
94s -
max time network
138s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
22/12/2024, 10:30
Static task
static1
Behavioral task
behavioral1
Sample
d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
Resource
win10v2004-20241007-en
General
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Target
d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
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Size
815KB
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MD5
e77149a738df525f2af09d73c0158662
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SHA1
f044840a18c70c1a443b3f13f5a28c13a5f6f9c2
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SHA256
d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506
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SHA512
46ab52a6d817f0d53009ccf8c7256a3d7755bef1064073c726a689cfa1bf172f1ec6017b2a5e941548b73289e125acb9eb0a33fa787198a83d1d32769a657fdc
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SSDEEP
12288:xq/uQD+rddH+kvKDcOfMZ3e9NIlFPJDe2LNZnV9ijsuynzNbOAGWsczLrkm:qDA5CDdQe9WlFPJq22MRlo0rk
Malware Config
Extracted
djvu
http://acacaca.org/test1/get.php
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extension
.vvew
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offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
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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 9 IoCs
resource yara_rule behavioral2/memory/3604-2-0x00000000022E0000-0x00000000023FB000-memory.dmp family_djvu behavioral2/memory/4152-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4152-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4152-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4152-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4152-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/404-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/404-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/404-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Djvu family
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2764 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bcd751cf-6f64-4bf4-a650-476f0c50f2f5\\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe\" --AutoStart" d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe -
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 14 api.2ip.ua 15 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3604 set thread context of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 2804 set thread context of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 3608 404 WerFault.exe 88 -
System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icacls.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 3604 wrote to memory of 4152 3604 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 84 PID 4152 wrote to memory of 2764 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 85 PID 4152 wrote to memory of 2764 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 85 PID 4152 wrote to memory of 2764 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 85 PID 4152 wrote to memory of 2804 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 86 PID 4152 wrote to memory of 2804 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 86 PID 4152 wrote to memory of 2804 4152 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 86 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88 PID 2804 wrote to memory of 404 2804 d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe"C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3604 -
C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe"C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4152 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\bcd751cf-6f64-4bf4-a650-476f0c50f2f5" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
PID:2764
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C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe"C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2804 -
C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe"C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
PID:404 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 5845⤵
- Program crash
PID:3608
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 404 -ip 4041⤵PID:3088
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\bcd751cf-6f64-4bf4-a650-476f0c50f2f5\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
Filesize815KB
MD5e77149a738df525f2af09d73c0158662
SHA1f044840a18c70c1a443b3f13f5a28c13a5f6f9c2
SHA256d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506
SHA51246ab52a6d817f0d53009ccf8c7256a3d7755bef1064073c726a689cfa1bf172f1ec6017b2a5e941548b73289e125acb9eb0a33fa787198a83d1d32769a657fdc