Analysis
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max time kernel
145s -
max time network
145s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
12-05-2021 15:22
Behavioral task
behavioral1
Sample
Private document 866.xls
Resource
win7v20210410
General
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Target
Private document 866.xls
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Size
277KB
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MD5
c527325d4d0b51734637b5344a3df760
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SHA1
f71b0baa85537ec1709701f39e8e9fd95f9b3d62
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SHA256
468cd4b5d89425cd29bb028696804ed339eb2c0c37b010b62442fbb5a8f778ba
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SHA512
074cfe3ecc88e982a704e979a3d63a7c286a30c8656dc71cf528336c7862090cdd134ebf641d336b0b7b6092838b007649bead23fe4cc1039a0a5611dc61f18c
Malware Config
Extracted
trickbot
2000029
net15
103.66.72.217:443
117.252.68.211:443
103.124.173.35:443
115.73.211.230:443
117.54.250.246:443
131.0.112.122:443
102.176.221.78:443
181.176.161.143:443
154.79.251.172:443
103.111.199.76:443
103.54.41.193:443
154.79.244.182:443
154.79.245.158:443
139.255.116.42:443
178.254.161.250:443
178.134.47.166:443
158.181.179.229:443
103.90.197.33:443
109.207.165.40:443
178.72.192.20:443
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autorunName:pwgrabbName:pwgrabc
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 8 1000 rundll32.exe EXCEL.EXE -
Templ.dll packer 1 IoCs
Detects Templ.dll packer which usually loads Trickbot.
Processes:
resource yara_rule behavioral2/memory/2416-184-0x0000000000A80000-0x0000000000AB6000-memory.dmp templ_dll -
Downloads MZ/PE file
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Loads dropped DLL 1 IoCs
Processes:
rundll32.exepid process 2416 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 api.ipify.org -
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 1000 EXCEL.EXE -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
wermgr.exedescription pid process Token: SeDebugPrivilege 3028 wermgr.exe -
Suspicious use of FindShellTrayWindow 2 IoCs
Processes:
EXCEL.EXEpid process 1000 EXCEL.EXE 1000 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE 1000 EXCEL.EXE -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
EXCEL.EXErundll32.exerundll32.exedescription pid process target process PID 1000 wrote to memory of 8 1000 EXCEL.EXE rundll32.exe PID 1000 wrote to memory of 8 1000 EXCEL.EXE rundll32.exe PID 8 wrote to memory of 2416 8 rundll32.exe rundll32.exe PID 8 wrote to memory of 2416 8 rundll32.exe rundll32.exe PID 8 wrote to memory of 2416 8 rundll32.exe rundll32.exe PID 2416 wrote to memory of 3028 2416 rundll32.exe wermgr.exe PID 2416 wrote to memory of 3028 2416 rundll32.exe wermgr.exe PID 2416 wrote to memory of 3028 2416 rundll32.exe wermgr.exe PID 2416 wrote to memory of 3028 2416 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\Private document 866.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1000 -
C:\Windows\SYSTEM32\rundll32.exerundll32 ..\hsdksksk.iem,StartW2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:8 -
C:\Windows\SysWOW64\rundll32.exerundll32 ..\hsdksksk.iem,StartW3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2416 -
C:\Windows\system32\wermgr.exeC:\Windows\system32\wermgr.exe4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3028
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\hsdksksk.iemMD5
3bb9fe6b7e6b4d9c3a3c83de6aacd952
SHA157c343ae5e95fe702b759737522e85fe9e97fe5e
SHA256697dea4b154178e8de096c66167b539aa4465155d294b11765f1a1886eb7c56d
SHA5121e98417c6c48e0bf405ae5feda4193c91a3b385f387f33d79fba3dc6f7aa7571444885e6628b7ca6075887bfbec3bd17e0782c11a1c45a7d4b1a139849ca4df0
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\Users\Admin\hsdksksk.iemMD5
3bb9fe6b7e6b4d9c3a3c83de6aacd952
SHA157c343ae5e95fe702b759737522e85fe9e97fe5e
SHA256697dea4b154178e8de096c66167b539aa4465155d294b11765f1a1886eb7c56d
SHA5121e98417c6c48e0bf405ae5feda4193c91a3b385f387f33d79fba3dc6f7aa7571444885e6628b7ca6075887bfbec3bd17e0782c11a1c45a7d4b1a139849ca4df0
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memory/8-179-0x0000000000000000-mapping.dmp
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memory/1000-118-0x00007FF861870000-0x00007FF861880000-memory.dmpFilesize
64KB
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memory/1000-115-0x00007FF861870000-0x00007FF861880000-memory.dmpFilesize
64KB
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memory/1000-121-0x00007FF861870000-0x00007FF861880000-memory.dmpFilesize
64KB
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memory/1000-122-0x00007FF882280000-0x00007FF88336E000-memory.dmpFilesize
16.9MB
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memory/1000-123-0x0000025FCC840000-0x0000025FCE735000-memory.dmpFilesize
31.0MB
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memory/1000-117-0x00007FF861870000-0x00007FF861880000-memory.dmpFilesize
64KB
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memory/1000-116-0x00007FF861870000-0x00007FF861880000-memory.dmpFilesize
64KB
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memory/1000-114-0x00007FF745660000-0x00007FF748C16000-memory.dmpFilesize
53.7MB
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memory/2416-181-0x0000000000000000-mapping.dmp
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memory/2416-186-0x00000000043D0000-0x00000000043D1000-memory.dmpFilesize
4KB
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memory/2416-185-0x00000000041D0000-0x0000000004213000-memory.dmpFilesize
268KB
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memory/2416-184-0x0000000000A80000-0x0000000000AB6000-memory.dmpFilesize
216KB
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memory/2416-187-0x00000000043B1000-0x00000000043B3000-memory.dmpFilesize
8KB
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memory/3028-183-0x0000000000000000-mapping.dmp
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memory/3028-188-0x00000229FC380000-0x00000229FC3A8000-memory.dmpFilesize
160KB
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memory/3028-189-0x00000229FC3C0000-0x00000229FC3C1000-memory.dmpFilesize
4KB