Analysis
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max time kernel
120s -
max time network
141s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
21-10-2021 08:42
Static task
static1
Behavioral task
behavioral1
Sample
4_System.Data.Linq.dll
Resource
win7-en-20210920
windows7_x64
0 signatures
0 seconds
General
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Target
4_System.Data.Linq.dll
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Size
180KB
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MD5
ae1ed6b52578a3d7392575e5f03eff32
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SHA1
a3776c95e9b9fc0e331ef1e0b1c57421fab3aeda
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SHA256
9ef35a402338ba732b6357dd7211f47c81ec9a8bc02dc6bc032d839947b08359
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SHA512
59751917c7396b8bb70f03af677d512d7cbac13973e189259079ee518091379aa913c7102bd408e29d8753655266005d8eb603b2e352295cfabbdd97a1aa2f2a
Malware Config
Extracted
Family
dridex
Botnet
22201
C2
155.138.203.91:443
207.180.220.242:8116
46.101.142.214:6891
rc4.plain
rc4.plain
Signatures
-
Processes:
resource yara_rule behavioral1/memory/760-55-0x0000000075070000-0x000000007509F000-memory.dmp dridex_ldr -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 524 760 WerFault.exe rundll32.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
WerFault.exepid process 524 WerFault.exe 524 WerFault.exe 524 WerFault.exe 524 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
WerFault.exedescription pid process Token: SeDebugPrivilege 524 WerFault.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 1368 wrote to memory of 760 1368 rundll32.exe rundll32.exe PID 1368 wrote to memory of 760 1368 rundll32.exe rundll32.exe PID 1368 wrote to memory of 760 1368 rundll32.exe rundll32.exe PID 1368 wrote to memory of 760 1368 rundll32.exe rundll32.exe PID 1368 wrote to memory of 760 1368 rundll32.exe rundll32.exe PID 1368 wrote to memory of 760 1368 rundll32.exe rundll32.exe PID 1368 wrote to memory of 760 1368 rundll32.exe rundll32.exe PID 760 wrote to memory of 524 760 rundll32.exe WerFault.exe PID 760 wrote to memory of 524 760 rundll32.exe WerFault.exe PID 760 wrote to memory of 524 760 rundll32.exe WerFault.exe PID 760 wrote to memory of 524 760 rundll32.exe WerFault.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\4_System.Data.Linq.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\4_System.Data.Linq.dll,#12⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 760 -s 2523⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
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memory/524-58-0x0000000000000000-mapping.dmp
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memory/524-59-0x0000000000B20000-0x0000000000B21000-memory.dmpFilesize
4KB
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memory/760-53-0x0000000000000000-mapping.dmp
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memory/760-54-0x00000000768C1000-0x00000000768C3000-memory.dmpFilesize
8KB
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memory/760-55-0x0000000075070000-0x000000007509F000-memory.dmpFilesize
188KB
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memory/760-57-0x00000000000C0000-0x00000000000C6000-memory.dmpFilesize
24KB