Analysis
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max time kernel
136s -
max time network
135s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
09-03-2021 08:36
Static task
static1
Behavioral task
behavioral1
Sample
inv-328575117-403563194.xls
Resource
win7v20201028
General
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Target
inv-328575117-403563194.xls
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Size
192KB
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MD5
4b5910053f010f45f4b33b4a86e47830
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SHA1
a1de0259459f1543450ec3363e477827af2cf61f
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SHA256
689df4841f154ed422fbd99922dd3ea7af2a215fa30811633cd4839bd5252cea
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SHA512
7d33a86c875175bf66776d9e015fea6871fe901a69754f1ca0a18625d5d844912ce6177e7f756bfddfcf2e1178753ec24ca3d315f362146ae745c3f9507a776c
Malware Config
Extracted
trickbot
100013
rob72
103.225.138.94:449
122.2.28.70:449
123.200.26.246:449
131.255.106.152:449
142.112.79.223:449
154.126.176.30:449
180.92.238.186:449
187.20.217.129:449
201.20.118.122:449
202.91.41.138:449
95.210.118.90:449
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autorunName:pwgrab
Signatures
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
rundll32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 1308 1056 rundll32.exe EXCEL.EXE -
Templ.dll packer 3 IoCs
Detects Templ.dll packer which usually loads Trickbot.
Processes:
resource yara_rule behavioral2/memory/1936-11-0x0000000004840000-0x0000000004879000-memory.dmp templ_dll behavioral2/memory/1936-12-0x0000000004880000-0x00000000048B7000-memory.dmp templ_dll behavioral2/memory/1936-13-0x0000000004310000-0x0000000004346000-memory.dmp templ_dll -
Loads dropped DLL 1 IoCs
Processes:
rundll32.exepid process 1936 rundll32.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 34 checkip.amazonaws.com -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
EXCEL.EXEdescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
EXCEL.EXEdescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 1056 EXCEL.EXE -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
wermgr.exedescription pid process Token: SeDebugPrivilege 548 wermgr.exe -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE 1056 EXCEL.EXE -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
EXCEL.EXErundll32.exerundll32.exedescription pid process target process PID 1056 wrote to memory of 1308 1056 EXCEL.EXE rundll32.exe PID 1056 wrote to memory of 1308 1056 EXCEL.EXE rundll32.exe PID 1308 wrote to memory of 1936 1308 rundll32.exe rundll32.exe PID 1308 wrote to memory of 1936 1308 rundll32.exe rundll32.exe PID 1308 wrote to memory of 1936 1308 rundll32.exe rundll32.exe PID 1936 wrote to memory of 1488 1936 rundll32.exe cmd.exe PID 1936 wrote to memory of 1488 1936 rundll32.exe cmd.exe PID 1936 wrote to memory of 1488 1936 rundll32.exe cmd.exe PID 1936 wrote to memory of 548 1936 rundll32.exe wermgr.exe PID 1936 wrote to memory of 548 1936 rundll32.exe wermgr.exe PID 1936 wrote to memory of 548 1936 rundll32.exe wermgr.exe PID 1936 wrote to memory of 548 1936 rundll32.exe wermgr.exe
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\inv-328575117-403563194.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\rundll32.exerundll32 ..\Frost.bitte,DllRegisterServer12⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32 ..\Frost.bitte,DllRegisterServer13⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\wermgr.exeC:\Windows\system32\wermgr.exe4⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe4⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\Frost.bitteMD5
5af074c9bec5f91119e5deac1964207a
SHA1c2ea2dbcf5393dbc02fb5a8f8040b80aee8d546d
SHA25668eb43b8e87657e66f8b25400926f55498bfde185252ee24eb068928d698e90d
SHA512dbfdb8145992efe00f9f8d1a82da9113ec722a6e5a135b652c087400cb75a05a7323314ec26f82d3b0483b65213e00f4309d25770c272b2db419dedb0f062089
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\Users\Admin\Frost.bitteMD5
5af074c9bec5f91119e5deac1964207a
SHA1c2ea2dbcf5393dbc02fb5a8f8040b80aee8d546d
SHA25668eb43b8e87657e66f8b25400926f55498bfde185252ee24eb068928d698e90d
SHA512dbfdb8145992efe00f9f8d1a82da9113ec722a6e5a135b652c087400cb75a05a7323314ec26f82d3b0483b65213e00f4309d25770c272b2db419dedb0f062089
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memory/548-14-0x0000000000000000-mapping.dmp
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memory/548-16-0x000002E6261B0000-0x000002E6261D8000-memory.dmpFilesize
160KB
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memory/548-17-0x000002E6262C0000-0x000002E6262C1000-memory.dmpFilesize
4KB
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memory/1056-2-0x00007FFF08940000-0x00007FFF08950000-memory.dmpFilesize
64KB
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memory/1056-6-0x00007FFF08940000-0x00007FFF08950000-memory.dmpFilesize
64KB
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memory/1056-4-0x00007FFF08940000-0x00007FFF08950000-memory.dmpFilesize
64KB
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memory/1056-5-0x00007FFF2CC50000-0x00007FFF2D287000-memory.dmpFilesize
6.2MB
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memory/1056-3-0x00007FFF08940000-0x00007FFF08950000-memory.dmpFilesize
64KB
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memory/1308-7-0x0000000000000000-mapping.dmp
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memory/1936-9-0x0000000000000000-mapping.dmp
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memory/1936-15-0x0000000004990000-0x0000000004991000-memory.dmpFilesize
4KB
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memory/1936-13-0x0000000004310000-0x0000000004346000-memory.dmpFilesize
216KB
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memory/1936-12-0x0000000004880000-0x00000000048B7000-memory.dmpFilesize
220KB
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memory/1936-11-0x0000000004840000-0x0000000004879000-memory.dmpFilesize
228KB
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memory/1936-18-0x00000000048C0000-0x0000000004903000-memory.dmpFilesize
268KB
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memory/1936-19-0x0000000004491000-0x0000000004493000-memory.dmpFilesize
8KB
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memory/1936-20-0x0000000010000000-0x0000000010037000-memory.dmpFilesize
220KB