Analysis
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max time kernel
91s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
26-02-2023 18:59
Static task
static1
Behavioral task
behavioral1
Sample
3632599571a4d48730d07a09343d1bde.dll
Resource
win7-20230220-en
windows7-x64
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
3632599571a4d48730d07a09343d1bde.dll
Resource
win10v2004-20230220-en
windows10-2004-x64
9 signatures
150 seconds
General
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Target
3632599571a4d48730d07a09343d1bde.dll
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Size
108KB
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MD5
3632599571a4d48730d07a09343d1bde
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SHA1
83b1ede8c8f10b92d7296d375fb0612e0b080da3
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SHA256
a3cd7a6ace2b75e39ea2a4ff5a3e4e27c840dc32606cd74990224814b2d3ac9d
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SHA512
947e71dbdad185c469cd04d5e0f5c1429098e3fe861f9f158e42348a937f85cedfb0892c09457d70547bf5e27cf880c05e49bdd1f8f431df9db3280b5573f9e7
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SSDEEP
1536:Oh3MU/5bLDCMtm/ejs5x2WcHG82RqNoRKV2KoyqkvILnzZh/Qz6r:mt5bLDtm/ejs5xqHG82RWqWILzZRQO
Score
10/10
Malware Config
Signatures
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FatalRat
FatalRat is a modular infostealer family written in C++ first appearing in June 2021.
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Fatal Rat payload 2 IoCs
resource yara_rule behavioral2/memory/4112-134-0x00000000026A0000-0x00000000026EE000-memory.dmp fatalrat behavioral2/memory/4112-135-0x0000000000DB0000-0x0000000000DD8000-memory.dmp fatalrat -
Blocklisted process makes network request 2 IoCs
flow pid Process 7 4112 rundll32.exe 22 4112 rundll32.exe -
Drops file in System32 directory 8 IoCs
description ioc Process File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{8E4606FF-D7BB-4351-847E-BC0B459D416E}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{93DF39D4-D507-49E4-8F4E-47D2B07A162D}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{DC354A0A-EDE9-451E-A096-C679AE87E043}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{33B40C9B-65B0-4120-8F08-AD2D84B8884D}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{3F37BF90-8AC3-4E66-B969-19D16708A974}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{06D231B0-95A7-4AE6-9EA5-7EF9121C7D63}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{16CC9EC7-086D-4358-8305-88598D030A9C}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{87BF58D6-F56F-40DE-95DA-CBFCD874DCB7}.catalogItem svchost.exe -
Checks processor information in registry 2 TTPs 5 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz rundll32.exe Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString svchost.exe -
Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU svchost.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe 4112 rundll32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4888 wrote to memory of 4112 4888 rundll32.exe 82 PID 4888 wrote to memory of 4112 4888 rundll32.exe 82 PID 4888 wrote to memory of 4112 4888 rundll32.exe 82 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\3632599571a4d48730d07a09343d1bde.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:4888 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\3632599571a4d48730d07a09343d1bde.dll,#12⤵
- Blocklisted process makes network request
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4112
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:4356