Analysis
-
max time kernel
151s -
max time network
162s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 00:59
Static task
static1
Behavioral task
behavioral1
Sample
PO_UCWEB.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
PO_UCWEB.exe
Resource
win10v2004-20220414-en
General
-
Target
PO_UCWEB.exe
-
Size
800KB
-
MD5
df0158771e58f80c1346943b393d92f6
-
SHA1
7293ed7ec4181d06b0f626bd9ebdef74f5e4850a
-
SHA256
6cfda8d801be1dc0741573babb2b48ccec13814faf7100875d32517d12d3ea60
-
SHA512
f03cbb9bbc3b183564c309087f5a73cee668791bf3bd12d92d312e95fa1d3a3b3e3858c24158749921bb093edc32704b8b946c7997976c07bba80aaf1fd8c7bb
Malware Config
Extracted
Protocol: smtp- Host:
smtp.yandex.com - Port:
587 - Username:
[email protected] - Password:
Blessed000@
Signatures
-
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
PO_UCWEB.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation PO_UCWEB.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
-
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.
-
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
PO_UCWEB.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 PO_UCWEB.exe Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 PO_UCWEB.exe Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 PO_UCWEB.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
-
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
PO_UCWEB.exepid process 4280 PO_UCWEB.exe 4280 PO_UCWEB.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
PO_UCWEB.exedescription pid process Token: SeDebugPrivilege 4280 PO_UCWEB.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
PO_UCWEB.exedescription pid process target process PID 4280 wrote to memory of 1152 4280 PO_UCWEB.exe schtasks.exe PID 4280 wrote to memory of 1152 4280 PO_UCWEB.exe schtasks.exe PID 4280 wrote to memory of 1152 4280 PO_UCWEB.exe schtasks.exe -
outlook_office_path 1 IoCs
Processes:
PO_UCWEB.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 PO_UCWEB.exe -
outlook_win_path 1 IoCs
Processes:
PO_UCWEB.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 PO_UCWEB.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\PO_UCWEB.exe"C:\Users\Admin\AppData\Local\Temp\PO_UCWEB.exe"1⤵
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KfuCgI" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCDEF.tmp"2⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\tmpCDEF.tmpFilesize
1KB
MD57051747047a86a8fc8b1cf5ff9439fab
SHA1cab834337984d5069bbff2bf166ed43e9954b404
SHA25649cda69c3be436e7d7c1f244d8a563de937f7fb8e509d6ba34d715552b290d26
SHA51238f720c54808a9e68a67dbdebf34f27f885b8a5c213092a73bc57f6420e8e3774934677e093bdd7b405da2b5c38c1e0cd3fbd8b85cfe42724fc248a1649b524a
-
memory/1152-135-0x0000000000000000-mapping.dmp
-
memory/4280-130-0x00000000009A0000-0x0000000000A6E000-memory.dmpFilesize
824KB
-
memory/4280-131-0x0000000005AD0000-0x0000000006074000-memory.dmpFilesize
5.6MB
-
memory/4280-132-0x0000000005430000-0x00000000054C2000-memory.dmpFilesize
584KB
-
memory/4280-133-0x0000000005840000-0x000000000584A000-memory.dmpFilesize
40KB
-
memory/4280-134-0x0000000008E60000-0x0000000008EFC000-memory.dmpFilesize
624KB
-
memory/4280-137-0x0000000009800000-0x0000000009866000-memory.dmpFilesize
408KB
-
memory/4280-138-0x0000000001330000-0x0000000001380000-memory.dmpFilesize
320KB