Analysis
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max time kernel
91s -
max time network
93s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
03/10/2024, 16:48
Static task
static1
Behavioral task
behavioral1
Sample
a2be1d5be7fc1358a081527ff2654d0ab5c2425ed960020fbbcccb8025cec1ffN.dll
Resource
win7-20240903-en
General
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Target
a2be1d5be7fc1358a081527ff2654d0ab5c2425ed960020fbbcccb8025cec1ffN.dll
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Size
685KB
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MD5
86a7a160e257e190399d6059cacca0a0
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SHA1
665fff8e0f5455e37d21da18ae12421da5ef3572
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SHA256
a2be1d5be7fc1358a081527ff2654d0ab5c2425ed960020fbbcccb8025cec1ff
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SHA512
0f9dc3decf33fbd78513e2313ddbb8af70e378be520a398b18e96510dbfb1549074d2a67be218c9482feda5eaa45723fb615083a92ef4ddfc1fe3477e39d12b2
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SSDEEP
12288:FiDTDIO3IfnPZjcEBfsKYEZuROtto4aIJayoPJviaKYNVuI:YKnPZjcEBfsKYFuayoSsuI
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 4072 rundll32mgr.exe -
Loads dropped DLL 1 IoCs
pid Process 4072 rundll32mgr.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32mgr.exe rundll32.exe -
resource yara_rule behavioral2/memory/4072-10-0x0000000000400000-0x000000000045C000-memory.dmp upx -
Program crash 1 IoCs
pid pid_target Process procid_target 880 4072 WerFault.exe 85 -
System Location Discovery: System Language Discovery 1 TTPs 2 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 rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32mgr.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3104 wrote to memory of 3884 3104 rundll32.exe 84 PID 3104 wrote to memory of 3884 3104 rundll32.exe 84 PID 3104 wrote to memory of 3884 3104 rundll32.exe 84 PID 3884 wrote to memory of 4072 3884 rundll32.exe 85 PID 3884 wrote to memory of 4072 3884 rundll32.exe 85 PID 3884 wrote to memory of 4072 3884 rundll32.exe 85
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\a2be1d5be7fc1358a081527ff2654d0ab5c2425ed960020fbbcccb8025cec1ffN.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3104 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\a2be1d5be7fc1358a081527ff2654d0ab5c2425ed960020fbbcccb8025cec1ffN.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3884 -
C:\Windows\SysWOW64\rundll32mgr.exeC:\Windows\SysWOW64\rundll32mgr.exe3⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
PID:4072 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4072 -s 5364⤵
- Program crash
PID:880
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4072 -ip 40721⤵PID:2068
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.6MB
MD54f3387277ccbd6d1f21ac5c07fe4ca68
SHA1e16506f662dc92023bf82def1d621497c8ab5890
SHA256767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac
SHA5129da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219
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Filesize
354KB
MD5a8245f71e4e4aff10e574300abd2bcc2
SHA17ea3ae53a0697e526c6bc877b103b390af042d7a
SHA2567bf945e4d87567106bfe8980b4fe1e6482578ab91fa9d82426c804ae5c3f2546
SHA5128c32f1f55c0475ce06ddbd3db80d529addb401089bd61491641d2e2c0c36020eabc5a947735388ae7a90514c543cb29450afa13b1e3f90387e432b62d4628978