Analysis
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max time kernel
149s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
04-05-2024 20:20
Static task
static1
Behavioral task
behavioral1
Sample
pdf.exe
Resource
win7-20240215-en
General
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Target
pdf.exe
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Size
661KB
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MD5
622d432561004acfc474b3eb679b3c57
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SHA1
54ac325a2f36fd1f804b6db6a69e73e6fbd6b83d
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SHA256
cac9f27ac564c17317125db57af909b78a9134edc9992bc573f624666775fd66
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SHA512
4f37a0c6e8f62ca7f5ab88c8ce0039bde074e1394b6086a93f9cc47461ebc34d1cfc03646414435d26bc1283358a0aa31892a784ce4dff3ee3229b4954a92e1f
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SSDEEP
12288:Pug52mXIrcT6Ne9vWtxgsGGNrNqUgcvyluD9otjt6gX4d0LCy:mgnXmVBJN28kjjtId0L
Malware Config
Extracted
nanocore
1.2.2.0
185.217.1.176:555
127.0.0.1:555
bd5c416c-71f5-4d6b-8bd1-843e849fe681
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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
2019-04-25T19:44:35.733601436Z
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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
555
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default_group
AAAAA
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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
bd5c416c-71f5-4d6b-8bd1-843e849fe681
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
185.217.1.176
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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
false
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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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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
pdf.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\DDP Subsystem = "C:\\Program Files (x86)\\DDP Subsystem\\ddpss.exe" pdf.exe -
Processes:
pdf.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA pdf.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
pdf.exedescription pid process target process PID 3000 set thread context of 2836 3000 pdf.exe pdf.exe -
Drops file in Program Files directory 2 IoCs
Processes:
pdf.exedescription ioc process File created C:\Program Files (x86)\DDP Subsystem\ddpss.exe pdf.exe File opened for modification C:\Program Files (x86)\DDP Subsystem\ddpss.exe pdf.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
pdf.exepdf.exepid process 3000 pdf.exe 2836 pdf.exe 2836 pdf.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
pdf.exepid process 2836 pdf.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
pdf.exepdf.exedescription pid process Token: SeDebugPrivilege 3000 pdf.exe Token: SeDebugPrivilege 2836 pdf.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
pdf.exedescription pid process target process PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe PID 3000 wrote to memory of 2836 3000 pdf.exe pdf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\pdf.exe"C:\Users\Admin\AppData\Local\Temp\pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000 -
C:\Users\Admin\AppData\Local\Temp\pdf.exe"C:\Users\Admin\AppData\Local\Temp\pdf.exe"2⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:2836