Analysis
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max time kernel
122s -
max time network
45s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
20-10-2021 21:40
Static task
static1
Behavioral task
behavioral1
Sample
8_clr.dll
Resource
win7-en-20210920
windows7_x64
0 signatures
0 seconds
General
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Target
8_clr.dll
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Size
180KB
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MD5
f66cbe92d85e332d274af0219340e137
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SHA1
f9a8197d2df29347c011bbe425e059bd2aa398e5
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SHA256
15e08697b366cab5dbfffde7116ac38f6771d6c7f7eb430df9bf621694817e38
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SHA512
996075b69f27045f610f08c7da2e1a0a3cd875bf09a4ed31dd5143a0d4544f6de99e1dc74da6192517c91cd9a01f2272ead60c5eb2c2dea76e443f62a8eed8f4
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
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Processes:
resource yara_rule behavioral1/memory/1524-55-0x00000000746C0000-0x00000000746EF000-memory.dmp dridex_ldr behavioral1/memory/1388-59-0x0000000000270000-0x00000000002D0000-memory.dmp dridex_ldr -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 1388 1524 WerFault.exe rundll32.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
WerFault.exepid process 1388 WerFault.exe 1388 WerFault.exe 1388 WerFault.exe 1388 WerFault.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
WerFault.exepid process 1388 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
WerFault.exedescription pid process Token: SeDebugPrivilege 1388 WerFault.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 1112 wrote to memory of 1524 1112 rundll32.exe rundll32.exe PID 1112 wrote to memory of 1524 1112 rundll32.exe rundll32.exe PID 1112 wrote to memory of 1524 1112 rundll32.exe rundll32.exe PID 1112 wrote to memory of 1524 1112 rundll32.exe rundll32.exe PID 1112 wrote to memory of 1524 1112 rundll32.exe rundll32.exe PID 1112 wrote to memory of 1524 1112 rundll32.exe rundll32.exe PID 1112 wrote to memory of 1524 1112 rundll32.exe rundll32.exe PID 1524 wrote to memory of 1388 1524 rundll32.exe WerFault.exe PID 1524 wrote to memory of 1388 1524 rundll32.exe WerFault.exe PID 1524 wrote to memory of 1388 1524 rundll32.exe WerFault.exe PID 1524 wrote to memory of 1388 1524 rundll32.exe WerFault.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\8_clr.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\8_clr.dll,#12⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1524 -s 2523⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
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memory/1388-57-0x0000000000000000-mapping.dmp
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memory/1388-59-0x0000000000270000-0x00000000002D0000-memory.dmpFilesize
384KB
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memory/1524-53-0x0000000000000000-mapping.dmp
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memory/1524-54-0x00000000751A1000-0x00000000751A3000-memory.dmpFilesize
8KB
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memory/1524-55-0x00000000746C0000-0x00000000746EF000-memory.dmpFilesize
188KB
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memory/1524-58-0x0000000000180000-0x0000000000186000-memory.dmpFilesize
24KB