Analysis
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max time kernel
68s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
07-02-2023 07:42
Static task
static1
Behavioral task
behavioral1
Sample
aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe
Resource
win7-20220812-en
General
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Target
aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe
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Size
1.3MB
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MD5
bbe4ba566d229a405da3af72193d297f
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SHA1
ffb73821d698bc2e32f1a32c7adf95e66520c7a8
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SHA256
aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107
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SHA512
a3ba9225b2719f482f807fe91217cdccbb9c415d54a8cd4531960bf20456868ba7fb1be2e473c26f306c33b74615a6f5192f0c852dca25c66e6d63a4cbb25529
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SSDEEP
24576:8ixNAopnJcU4TgHosbIY95AcS1h9VOzYJ0Natxb:8iFpnx4TUosbIYEcSGQ06
Malware Config
Extracted
nanocore
1.2.2.0
rcontrol4sec.ddnsgeek.com:5080
127.0.0.1:5080
19b525d2-02f6-47c5-b606-1d038212d191
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activate_away_mode
true
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backup_connection_host
127.0.0.1
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2022-11-12T11:11:53.819338936Z
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bypass_user_account_control
true
- bypass_user_account_control_data
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clear_access_control
true
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clear_zone_identifier
false
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connect_delay
4000
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connection_port
5080
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default_group
Set
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enable_debug_mode
true
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gc_threshold
1.048576e+07
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keep_alive_timeout
30000
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keyboard_logging
false
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lan_timeout
2500
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max_packet_size
1.048576e+07
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mutex
19b525d2-02f6-47c5-b606-1d038212d191
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
rcontrol4sec.ddnsgeek.com
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primary_dns_server
8.8.8.8
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request_elevation
true
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restart_delay
5000
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run_delay
0
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run_on_startup
true
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set_critical_process
true
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timeout_interval
5000
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use_custom_dns_server
false
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version
1.2.2.0
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wan_timeout
8000
Signatures
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Detect PureCrypter injector 1 IoCs
resource yara_rule behavioral1/memory/752-55-0x0000000004E40000-0x00000000050C2000-memory.dmp family_purecrypter -
Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\Adobe\\Flash Player.exe\"," aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe -
PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
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description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 752 set thread context of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 608 powershell.exe 1488 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 1488 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 1488 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 1488 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 1488 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe Token: SeDebugPrivilege 608 powershell.exe Token: SeDebugPrivilege 1488 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe -
Suspicious use of WriteProcessMemory 13 IoCs
description pid Process procid_target PID 752 wrote to memory of 608 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 27 PID 752 wrote to memory of 608 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 27 PID 752 wrote to memory of 608 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 27 PID 752 wrote to memory of 608 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 27 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29 PID 752 wrote to memory of 1488 752 aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe"C:\Users\Admin\AppData\Local\Temp\aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe"1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:752 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:608
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C:\Users\Admin\AppData\Local\Temp\aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exeC:\Users\Admin\AppData\Local\Temp\aeb8e080b996a75f85bb82e2e7a42d0302735713f34fb95fff1bfb97a030e107.exe2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1488
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