Analysis
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max time kernel
102s -
max time network
130s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
04-05-2021 17:58
Static task
static1
Behavioral task
behavioral1
Sample
netmouser.dll
Resource
win7v20210410
General
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Target
netmouser.dll
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Size
433KB
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MD5
eb70b6c24c0466954169882dbe5729a4
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SHA1
b81bcd8273854efb7d7b3fb5b982d75051a5d9a6
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SHA256
c6f319a3eda16bef437421920e2945ab4b3101cb27ad2f291c3dacdf84bb2240
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SHA512
e90c5c958024734f089205e43f2c9a842e4fc68b8a7fcc7fc10754511a8b6bb724eab563bdd5141f9a1be634a3194f5b3abd14f97cdd0735c42f501d8f63e59f
Malware Config
Extracted
trickbot
2000029
net9
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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Templ.dll packer 1 IoCs
Detects Templ.dll packer which usually loads Trickbot.
Processes:
resource yara_rule behavioral2/memory/3884-115-0x00000000040F0000-0x0000000004316000-memory.dmp templ_dll -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 20 ident.me 21 ident.me -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3964 3884 WerFault.exe rundll32.exe -
Suspicious behavior: EnumeratesProcesses 15 IoCs
Processes:
WerFault.exepid process 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe 3964 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
WerFault.exewermgr.exedescription pid process Token: SeRestorePrivilege 3964 WerFault.exe Token: SeBackupPrivilege 3964 WerFault.exe Token: SeDebugPrivilege 3964 WerFault.exe Token: SeDebugPrivilege 2872 wermgr.exe -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 3920 wrote to memory of 3884 3920 rundll32.exe rundll32.exe PID 3920 wrote to memory of 3884 3920 rundll32.exe rundll32.exe PID 3920 wrote to memory of 3884 3920 rundll32.exe rundll32.exe PID 3884 wrote to memory of 2872 3884 rundll32.exe wermgr.exe PID 3884 wrote to memory of 2872 3884 rundll32.exe wermgr.exe PID 3884 wrote to memory of 2872 3884 rundll32.exe wermgr.exe PID 3884 wrote to memory of 2872 3884 rundll32.exe wermgr.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\netmouser.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\netmouser.dll,#12⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\wermgr.exeC:\Windows\system32\wermgr.exe3⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3884 -s 6603⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/2872-116-0x0000000000000000-mapping.dmp
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memory/2872-120-0x000001CC5A470000-0x000001CC5A498000-memory.dmpFilesize
160KB
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memory/2872-121-0x000001CC5A580000-0x000001CC5A581000-memory.dmpFilesize
4KB
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memory/3884-114-0x0000000000000000-mapping.dmp
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memory/3884-115-0x00000000040F0000-0x0000000004316000-memory.dmpFilesize
2.1MB
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memory/3884-117-0x0000000004320000-0x0000000004363000-memory.dmpFilesize
268KB
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memory/3884-119-0x0000000010001000-0x0000000010003000-memory.dmpFilesize
8KB
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memory/3884-118-0x00000000040D0000-0x00000000040D1000-memory.dmpFilesize
4KB