Analysis
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max time kernel
145s -
max time network
112s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
17-11-2020 14:48
Static task
static1
Behavioral task
behavioral1
Sample
d8c4f0bb55040ead44e31a083886baa9.exe
Resource
win7v20201028
General
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Target
d8c4f0bb55040ead44e31a083886baa9.exe
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Size
1.1MB
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MD5
2a1c75e5e80e13efb9f8e98044bb44c8
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SHA1
7a4a2199dbfe00d57114e8378869277b3afa728d
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SHA256
ab3c113121c1fdfde39a4ce53d6f38490f6393d847d14e727aa5260594e88c79
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SHA512
bbb7ac2a84358cb155927922da87ce3f456afa783f049977c250b68342c17a1080bad9e4c1854af38b06f6da5e9548260cdc0390b84dbfc3a0f06cf7b63c38e6
Malware Config
Extracted
Protocol: smtp- Host:
smtp.casalsmd.com - Port:
587 - Username:
carolina@casalsmd.com - Password:
Carolina123
Signatures
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Processes:
resource yara_rule behavioral2/memory/1720-1-0x0000000000400000-0x000000000051D000-memory.dmp upx behavioral2/memory/1720-3-0x0000000000400000-0x000000000051D000-memory.dmp upx behavioral2/memory/1720-4-0x0000000000400000-0x000000000051D000-memory.dmp upx -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Uses the VBS compiler for execution 1 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
d8c4f0bb55040ead44e31a083886baa9.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update = "C:\\Users\\Admin\\AppData\\Roaming\\WindowsUpdate.exe" d8c4f0bb55040ead44e31a083886baa9.exe -
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 11 whatismyipaddress.com 13 whatismyipaddress.com -
Suspicious use of SetThreadContext 3 IoCs
Processes:
d8c4f0bb55040ead44e31a083886baa9.exed8c4f0bb55040ead44e31a083886baa9.exedescription pid process target process PID 756 set thread context of 1720 756 d8c4f0bb55040ead44e31a083886baa9.exe d8c4f0bb55040ead44e31a083886baa9.exe PID 1720 set thread context of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 set thread context of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
d8c4f0bb55040ead44e31a083886baa9.exevbc.exed8c4f0bb55040ead44e31a083886baa9.exepid process 756 d8c4f0bb55040ead44e31a083886baa9.exe 756 d8c4f0bb55040ead44e31a083886baa9.exe 3892 vbc.exe 3892 vbc.exe 1720 d8c4f0bb55040ead44e31a083886baa9.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
d8c4f0bb55040ead44e31a083886baa9.exepid process 756 d8c4f0bb55040ead44e31a083886baa9.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
d8c4f0bb55040ead44e31a083886baa9.exedescription pid process Token: SeDebugPrivilege 1720 d8c4f0bb55040ead44e31a083886baa9.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
d8c4f0bb55040ead44e31a083886baa9.exepid process 1720 d8c4f0bb55040ead44e31a083886baa9.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
d8c4f0bb55040ead44e31a083886baa9.exed8c4f0bb55040ead44e31a083886baa9.exedescription pid process target process PID 756 wrote to memory of 1720 756 d8c4f0bb55040ead44e31a083886baa9.exe d8c4f0bb55040ead44e31a083886baa9.exe PID 756 wrote to memory of 1720 756 d8c4f0bb55040ead44e31a083886baa9.exe d8c4f0bb55040ead44e31a083886baa9.exe PID 756 wrote to memory of 1720 756 d8c4f0bb55040ead44e31a083886baa9.exe d8c4f0bb55040ead44e31a083886baa9.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 1428 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe PID 1720 wrote to memory of 3892 1720 d8c4f0bb55040ead44e31a083886baa9.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\d8c4f0bb55040ead44e31a083886baa9.exe"C:\Users\Admin\AppData\Local\Temp\d8c4f0bb55040ead44e31a083886baa9.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\d8c4f0bb55040ead44e31a083886baa9.exe"C:\Users\Admin\AppData\Local\Temp\d8c4f0bb55040ead44e31a083886baa9.exe"2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"3⤵
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"3⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\holderwb.txtMD5
f94dc819ca773f1e3cb27abbc9e7fa27
SHA19a7700efadc5ea09ab288544ef1e3cd876255086
SHA256a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92
SHA51272a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196
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memory/756-0-0x0000000000400000-0x0000000000515000-memory.dmpFilesize
1.1MB
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memory/1428-7-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/1428-9-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/1428-8-0x0000000000411654-mapping.dmp
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memory/1720-3-0x0000000000400000-0x000000000051D000-memory.dmpFilesize
1.1MB
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memory/1720-6-0x0000000002402000-0x0000000002403000-memory.dmpFilesize
4KB
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memory/1720-5-0x00000000022D0000-0x0000000002358000-memory.dmpFilesize
544KB
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memory/1720-4-0x0000000000400000-0x000000000051D000-memory.dmpFilesize
1.1MB
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memory/1720-2-0x000000000051B4D0-mapping.dmp
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memory/1720-1-0x0000000000400000-0x000000000051D000-memory.dmpFilesize
1.1MB
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memory/3892-10-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/3892-11-0x0000000000442628-mapping.dmp
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memory/3892-12-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB