Analysis
- max time kernel
89s - max time network
91s - platform
windows10_x64 - resource
win10v20210408 - submitted
25/09/2021, 17:46
Static task
static1
Behavioral task
behavioral1
Sample
82729b46754db1f3eb73be457bdcc42c.exe
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
82729b46754db1f3eb73be457bdcc42c.exe
Resource
win10v20210408
General
- Target 82729b46754db1f3eb73be457bdcc42c.exe
- Size 434KB
- Sample210925-wcbf1sdfh2
- SHA256 3e929304dd13990cc2fdb0673a8eac7387fac96052f76f9fd432c3fc7f04fd1d
- MD5 82729b46754db1f3eb73be457bdcc42c
- SHA1 05c82572c7b189ae065f8c3d24f73c17ada3a801
- SHA512 c73b678a77caf6ab4ba88d9933f35b98479fa56e858a2a6bb61e17f6394d042543d47acaef91de75878205cca22fb05be86011bab34aa96eb82f5d07825ac958
- MD5 SHA1 SHA512
Malware Config
Extracted
-
raccoon
-
f6d7183c9e82d2a9b81e6c0608450aa66cefb51f
-
url4cnc
https://t.me/justoprostohello
Signatures
- Downloads MZ/PE file
- Executes dropped EXE 2 IoCs
pid Process 60 zzYemT1YAL.exe 2220 sihost.exe - Loads dropped DLL 6 IoCs
pid Process 4016 82729b46754db1f3eb73be457bdcc42c.exe 4016 82729b46754db1f3eb73be457bdcc42c.exe 4016 82729b46754db1f3eb73be457bdcc42c.exe 4016 82729b46754db1f3eb73be457bdcc42c.exe 4016 82729b46754db1f3eb73be457bdcc42c.exe 4016 82729b46754db1f3eb73be457bdcc42c.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 816 schtasks.exe 2388 schtasks.exe - Delays execution with timeout.exe 1 IoCs
pid Process 644 timeout.exe - Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4016 wrote to memory of 60 4016 82729b46754db1f3eb73be457bdcc42c.exe 68 PID 4016 wrote to memory of 60 4016 82729b46754db1f3eb73be457bdcc42c.exe 68 PID 4016 wrote to memory of 60 4016 82729b46754db1f3eb73be457bdcc42c.exe 68 PID 4016 wrote to memory of 64 4016 82729b46754db1f3eb73be457bdcc42c.exe 69 PID 4016 wrote to memory of 64 4016 82729b46754db1f3eb73be457bdcc42c.exe 69 PID 4016 wrote to memory of 64 4016 82729b46754db1f3eb73be457bdcc42c.exe 69 PID 64 wrote to memory of 644 64 cmd.exe 71 PID 64 wrote to memory of 644 64 cmd.exe 71 PID 64 wrote to memory of 644 64 cmd.exe 71 PID 60 wrote to memory of 816 60 zzYemT1YAL.exe 72 PID 60 wrote to memory of 816 60 zzYemT1YAL.exe 72 PID 60 wrote to memory of 816 60 zzYemT1YAL.exe 72 PID 2220 wrote to memory of 2388 2220 sihost.exe 77 PID 2220 wrote to memory of 2388 2220 sihost.exe 77 PID 2220 wrote to memory of 2388 2220 sihost.exe 77
Processes
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C:\Users\Admin\AppData\Local\Temp\82729b46754db1f3eb73be457bdcc42c.exe"C:\Users\Admin\AppData\Local\Temp\82729b46754db1f3eb73be457bdcc42c.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:4016 -
C:\Users\Admin\AppData\Local\Temp\zzYemT1YAL.exe"C:\Users\Admin\AppData\Local\Temp\zzYemT1YAL.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:60 -
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:816
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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\82729b46754db1f3eb73be457bdcc42c.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:64 -
C:\Windows\SysWOW64\timeout.exetimeout /T 10 /NOBREAK3⤵
- Delays execution with timeout.exe
PID:644
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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:2220 -
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:2388
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