Analysis
- max time kernel
58s - max time network
120s - platform
windows10_x64 - resource
win10v20210408 - submitted
13/09/2021, 15:22
Static task
static1
Behavioral task
behavioral1
Sample
3379c53e0974e8be9749f56b2c583b34.exe
Resource
win7-en
0 signatures
0 seconds
General
- Target 3379c53e0974e8be9749f56b2c583b34.exe
- Size 472KB
- Sample210913-srwtqaeab5
- SHA256 88bea616209dfb7515186c71ef3555315eae375e4bf1fdff5267aea751323ae6
- MD5 3379c53e0974e8be9749f56b2c583b34
- SHA1 943e0b8298bf08e06a6f2fc1ca6477f8f6821e0d
- SHA512 a37055aefd8ea59d5ab2d2a5461e95ccb5aa80bbd12c0bfa4035dee0ecf667335ec1aa356b793d65ebd5601d24e5385fdafd5a7f7862d3361c935bbad0d02819
- MD5 SHA1 SHA512
Malware Config
Signatures
- Downloads MZ/PE file
- Executes dropped EXE 2 IoCs
pid Process 3636 YZ2Z8aHgfI.exe 3768 sihost.exe - Loads dropped DLL 5 IoCs
pid Process 3728 3379c53e0974e8be9749f56b2c583b34.exe 3728 3379c53e0974e8be9749f56b2c583b34.exe 3728 3379c53e0974e8be9749f56b2c583b34.exe 3728 3379c53e0974e8be9749f56b2c583b34.exe 3728 3379c53e0974e8be9749f56b2c583b34.exe - Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2712 schtasks.exe 812 schtasks.exe - Delays execution with timeout.exe 1 IoCs
pid Process 652 timeout.exe - Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 3728 wrote to memory of 3636 3728 3379c53e0974e8be9749f56b2c583b34.exe 68 PID 3728 wrote to memory of 3636 3728 3379c53e0974e8be9749f56b2c583b34.exe 68 PID 3728 wrote to memory of 3636 3728 3379c53e0974e8be9749f56b2c583b34.exe 68 PID 3728 wrote to memory of 3700 3728 3379c53e0974e8be9749f56b2c583b34.exe 69 PID 3728 wrote to memory of 3700 3728 3379c53e0974e8be9749f56b2c583b34.exe 69 PID 3728 wrote to memory of 3700 3728 3379c53e0974e8be9749f56b2c583b34.exe 69 PID 3700 wrote to memory of 652 3700 cmd.exe 71 PID 3700 wrote to memory of 652 3700 cmd.exe 71 PID 3700 wrote to memory of 652 3700 cmd.exe 71 PID 3636 wrote to memory of 812 3636 YZ2Z8aHgfI.exe 72 PID 3636 wrote to memory of 812 3636 YZ2Z8aHgfI.exe 72 PID 3636 wrote to memory of 812 3636 YZ2Z8aHgfI.exe 72 PID 3768 wrote to memory of 2712 3768 sihost.exe 82 PID 3768 wrote to memory of 2712 3768 sihost.exe 82 PID 3768 wrote to memory of 2712 3768 sihost.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\3379c53e0974e8be9749f56b2c583b34.exe"C:\Users\Admin\AppData\Local\Temp\3379c53e0974e8be9749f56b2c583b34.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3728 -
C:\Users\Admin\AppData\Local\Temp\YZ2Z8aHgfI.exe"C:\Users\Admin\AppData\Local\Temp\YZ2Z8aHgfI.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3636 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe"3⤵
- Creates scheduled task(s)
PID:812
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C:\Windows\SysWOW64\cmd.execmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\3379c53e0974e8be9749f56b2c583b34.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:3700 -
C:\Windows\SysWOW64\timeout.exetimeout /T 10 /NOBREAK3⤵
- Delays execution with timeout.exe
PID:652
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3768 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe"2⤵
- Creates scheduled task(s)
PID:2712
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