Analysis
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max time kernel
121s -
max time network
121s -
platform
windows10_x64 -
resource
win10-en-20211014 -
submitted
21-10-2021 19:06
Static task
static1
Behavioral task
behavioral1
Sample
5_System.Numerics.dll
Resource
win7-en-20210920
windows7_x64
0 signatures
0 seconds
General
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Target
5_System.Numerics.dll
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Size
180KB
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MD5
4aa41378b7c700010b1a3ec72a588306
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SHA1
3d9ca1eb8a16c0350c233f291c399b177cccc980
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SHA256
7bbe546e2f5367c00bb05a53f122756098df9c75019167455c3bffa73e11a7e1
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SHA512
aa61fce6f9430580cd5c8f4a9b1d7d9781b96371cd4da00a4ed4bf6c16c872b6d20f291663bbd0a8ab84f1ed9e5bd8e2f4558395150f764e94648d9c05d94eee
Malware Config
Extracted
Family
dridex
Botnet
22201
C2
212.237.17.99:443
176.28.17.160:6602
51.254.140.238:8333
rc4.plain
rc4.plain
Signatures
-
Processes:
resource yara_rule behavioral2/memory/2896-116-0x0000000073930000-0x000000007395F000-memory.dmp dridex_ldr -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 720 2896 WerFault.exe rundll32.exe -
Suspicious behavior: EnumeratesProcesses 12 IoCs
Processes:
WerFault.exepid process 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe 720 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
WerFault.exedescription pid process Token: SeRestorePrivilege 720 WerFault.exe Token: SeBackupPrivilege 720 WerFault.exe Token: SeDebugPrivilege 720 WerFault.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
rundll32.exedescription pid process target process PID 2708 wrote to memory of 2896 2708 rundll32.exe rundll32.exe PID 2708 wrote to memory of 2896 2708 rundll32.exe rundll32.exe PID 2708 wrote to memory of 2896 2708 rundll32.exe rundll32.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\5_System.Numerics.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\5_System.Numerics.dll,#12⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2896 -s 6163⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken