Analysis
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max time kernel
149s -
max time network
148s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
25-01-2021 14:38
Static task
static1
Behavioral task
behavioral1
Sample
PO#4018-308875.pdf.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
PO#4018-308875.pdf.exe
Resource
win10v20201028
General
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Target
PO#4018-308875.pdf.exe
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Size
627KB
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MD5
ea28f2d01808072dbe45804f514ef905
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SHA1
771ff981d42d6c7fc3550de8cb109e3311b0e0fa
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SHA256
618d343a6d7f54a0bfd917555c79c6a777b10a35fc2da0d75f6d85354de40637
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SHA512
14c8f4c649f60238a1398bf28cd8a1a1c94d14b74d888a26bca537317de1d1beada94a6fdb5d51a3ad30ee4c07e389e0fe6eb988e29df485808fd19114715d16
Malware Config
Extracted
nanocore
1.2.2.0
185.162.88.26:20911
fenixalec.ddns.net:20911
4c844ad7-de78-4c04-815b-d468ebb89811
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activate_away_mode
true
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backup_connection_host
fenixalec.ddns.net
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2020-10-25T21:31:56.793896536Z
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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
true
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connect_delay
4000
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connection_port
20911
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default_group
2021 GREATEST
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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
-
lan_timeout
2500
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max_packet_size
1.048576e+07
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mutex
4c844ad7-de78-4c04-815b-d468ebb89811
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mutex_timeout
5000
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prevent_system_sleep
true
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primary_connection_host
185.162.88.26
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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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Executes dropped EXE 2 IoCs
Processes:
tgfcdsxazs.exeInstallUtil.exepid process 532 tgfcdsxazs.exe 1760 InstallUtil.exe -
Loads dropped DLL 2 IoCs
Processes:
PO#4018-308875.pdf.exetgfcdsxazs.exepid process 2028 PO#4018-308875.pdf.exe 532 tgfcdsxazs.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
reg.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\kolkmjnhgf = "C:\\Users\\Admin\\AppData\\Roaming\\tgfcdsxazs.exe" reg.exe -
Processes:
InstallUtil.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA InstallUtil.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
tgfcdsxazs.exedescription pid process target process PID 532 set thread context of 1760 532 tgfcdsxazs.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 10 IoCs
Processes:
PO#4018-308875.pdf.exetgfcdsxazs.exeInstallUtil.exepid process 2028 PO#4018-308875.pdf.exe 2028 PO#4018-308875.pdf.exe 2028 PO#4018-308875.pdf.exe 2028 PO#4018-308875.pdf.exe 2028 PO#4018-308875.pdf.exe 532 tgfcdsxazs.exe 532 tgfcdsxazs.exe 1760 InstallUtil.exe 1760 InstallUtil.exe 1760 InstallUtil.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
InstallUtil.exepid process 1760 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
PO#4018-308875.pdf.exetgfcdsxazs.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 2028 PO#4018-308875.pdf.exe Token: SeDebugPrivilege 532 tgfcdsxazs.exe Token: SeDebugPrivilege 1760 InstallUtil.exe -
Suspicious use of WriteProcessMemory 27 IoCs
Processes:
PO#4018-308875.pdf.execmd.exetgfcdsxazs.exedescription pid process target process PID 2028 wrote to memory of 740 2028 PO#4018-308875.pdf.exe cmd.exe PID 2028 wrote to memory of 740 2028 PO#4018-308875.pdf.exe cmd.exe PID 2028 wrote to memory of 740 2028 PO#4018-308875.pdf.exe cmd.exe PID 2028 wrote to memory of 740 2028 PO#4018-308875.pdf.exe cmd.exe PID 740 wrote to memory of 1652 740 cmd.exe reg.exe PID 740 wrote to memory of 1652 740 cmd.exe reg.exe PID 740 wrote to memory of 1652 740 cmd.exe reg.exe PID 740 wrote to memory of 1652 740 cmd.exe reg.exe PID 2028 wrote to memory of 532 2028 PO#4018-308875.pdf.exe tgfcdsxazs.exe PID 2028 wrote to memory of 532 2028 PO#4018-308875.pdf.exe tgfcdsxazs.exe PID 2028 wrote to memory of 532 2028 PO#4018-308875.pdf.exe tgfcdsxazs.exe PID 2028 wrote to memory of 532 2028 PO#4018-308875.pdf.exe tgfcdsxazs.exe PID 2028 wrote to memory of 532 2028 PO#4018-308875.pdf.exe tgfcdsxazs.exe PID 2028 wrote to memory of 532 2028 PO#4018-308875.pdf.exe tgfcdsxazs.exe PID 2028 wrote to memory of 532 2028 PO#4018-308875.pdf.exe tgfcdsxazs.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe PID 532 wrote to memory of 1760 532 tgfcdsxazs.exe InstallUtil.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\PO#4018-308875.pdf.exe"C:\Users\Admin\AppData\Local\Temp\PO#4018-308875.pdf.exe"1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "kolkmjnhgf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\tgfcdsxazs.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "kolkmjnhgf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\tgfcdsxazs.exe"3⤵
- Adds Run key to start application
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C:\Users\Admin\AppData\Roaming\tgfcdsxazs.exe"C:\Users\Admin\AppData\Roaming\tgfcdsxazs.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"3⤵
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Roaming\tgfcdsxazs.exeMD5
ea28f2d01808072dbe45804f514ef905
SHA1771ff981d42d6c7fc3550de8cb109e3311b0e0fa
SHA256618d343a6d7f54a0bfd917555c79c6a777b10a35fc2da0d75f6d85354de40637
SHA51214c8f4c649f60238a1398bf28cd8a1a1c94d14b74d888a26bca537317de1d1beada94a6fdb5d51a3ad30ee4c07e389e0fe6eb988e29df485808fd19114715d16
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C:\Users\Admin\AppData\Roaming\tgfcdsxazs.exeMD5
ea28f2d01808072dbe45804f514ef905
SHA1771ff981d42d6c7fc3550de8cb109e3311b0e0fa
SHA256618d343a6d7f54a0bfd917555c79c6a777b10a35fc2da0d75f6d85354de40637
SHA51214c8f4c649f60238a1398bf28cd8a1a1c94d14b74d888a26bca537317de1d1beada94a6fdb5d51a3ad30ee4c07e389e0fe6eb988e29df485808fd19114715d16
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\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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\Users\Admin\AppData\Roaming\tgfcdsxazs.exeMD5
ea28f2d01808072dbe45804f514ef905
SHA1771ff981d42d6c7fc3550de8cb109e3311b0e0fa
SHA256618d343a6d7f54a0bfd917555c79c6a777b10a35fc2da0d75f6d85354de40637
SHA51214c8f4c649f60238a1398bf28cd8a1a1c94d14b74d888a26bca537317de1d1beada94a6fdb5d51a3ad30ee4c07e389e0fe6eb988e29df485808fd19114715d16
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memory/532-12-0x0000000000000000-mapping.dmp
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memory/532-22-0x0000000000590000-0x0000000000591000-memory.dmpFilesize
4KB
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memory/532-21-0x0000000000520000-0x000000000052B000-memory.dmpFilesize
44KB
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memory/532-25-0x0000000004891000-0x0000000004892000-memory.dmpFilesize
4KB
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memory/532-15-0x0000000074EE0000-0x00000000755CE000-memory.dmpFilesize
6.9MB
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memory/532-16-0x0000000000EC0000-0x0000000000EC1000-memory.dmpFilesize
4KB
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memory/532-20-0x0000000004890000-0x0000000004891000-memory.dmpFilesize
4KB
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memory/740-8-0x0000000000000000-mapping.dmp
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memory/1652-9-0x0000000000000000-mapping.dmp
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memory/1760-27-0x000000000041E792-mapping.dmp
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memory/1760-29-0x0000000074EE0000-0x00000000755CE000-memory.dmpFilesize
6.9MB
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memory/1760-35-0x0000000004D90000-0x0000000004D91000-memory.dmpFilesize
4KB
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memory/1760-34-0x00000000003F0000-0x00000000003F3000-memory.dmpFilesize
12KB
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memory/1760-33-0x00000000004F0000-0x0000000000509000-memory.dmpFilesize
100KB
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memory/1760-26-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1760-32-0x00000000003A0000-0x00000000003A5000-memory.dmpFilesize
20KB
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memory/1760-30-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2028-5-0x00000000003F0000-0x000000000040E000-memory.dmpFilesize
120KB
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memory/2028-3-0x0000000001210000-0x0000000001211000-memory.dmpFilesize
4KB
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memory/2028-2-0x0000000074EE0000-0x00000000755CE000-memory.dmpFilesize
6.9MB
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memory/2028-10-0x0000000004BD1000-0x0000000004BD2000-memory.dmpFilesize
4KB
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memory/2028-6-0x00000000003D0000-0x00000000003D1000-memory.dmpFilesize
4KB
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memory/2028-7-0x0000000004BD0000-0x0000000004BD1000-memory.dmpFilesize
4KB