Analysis
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max time kernel
150s -
max time network
148s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
21-01-2021 06:17
Static task
static1
Behavioral task
behavioral1
Sample
PO#4018-308875.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
PO#4018-308875.exe
Resource
win10v20201028
General
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Target
PO#4018-308875.exe
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Size
700KB
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MD5
26b17b353c8950ca0a55e1ea21678d9e
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SHA1
c5f2e80f53a312bd1b8dd3bba438af27a4ba44e3
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SHA256
43bdef53f8ff0d262c2086a46c66d76f8c5e2b9df085959c70a5a3c679474767
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SHA512
b90a04a218ae54201a4ab25848c91dc197c829c90beb4de4b8cc5f9f54928a962151129796181b9dbf48da1be6bb7294f878e3bdf020373b9df2c8a759e8be23
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
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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:
hjfufkimd.exeInstallUtil.exepid process 1612 hjfufkimd.exe 436 InstallUtil.exe -
Loads dropped DLL 2 IoCs
Processes:
PO#4018-308875.exehjfufkimd.exepid process 1832 PO#4018-308875.exe 1612 hjfufkimd.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\erwtvsfvc = "C:\\Users\\Admin\\AppData\\Roaming\\hjfufkimd.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:
hjfufkimd.exedescription pid process target process PID 1612 set thread context of 436 1612 hjfufkimd.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 10 IoCs
Processes:
PO#4018-308875.exehjfufkimd.exeInstallUtil.exepid process 1832 PO#4018-308875.exe 1832 PO#4018-308875.exe 1832 PO#4018-308875.exe 1832 PO#4018-308875.exe 1832 PO#4018-308875.exe 1612 hjfufkimd.exe 1612 hjfufkimd.exe 436 InstallUtil.exe 436 InstallUtil.exe 436 InstallUtil.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
InstallUtil.exepid process 436 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
PO#4018-308875.exehjfufkimd.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 1832 PO#4018-308875.exe Token: SeDebugPrivilege 1612 hjfufkimd.exe Token: SeDebugPrivilege 436 InstallUtil.exe -
Suspicious use of WriteProcessMemory 27 IoCs
Processes:
PO#4018-308875.execmd.exehjfufkimd.exedescription pid process target process PID 1832 wrote to memory of 852 1832 PO#4018-308875.exe cmd.exe PID 1832 wrote to memory of 852 1832 PO#4018-308875.exe cmd.exe PID 1832 wrote to memory of 852 1832 PO#4018-308875.exe cmd.exe PID 1832 wrote to memory of 852 1832 PO#4018-308875.exe cmd.exe PID 852 wrote to memory of 544 852 cmd.exe reg.exe PID 852 wrote to memory of 544 852 cmd.exe reg.exe PID 852 wrote to memory of 544 852 cmd.exe reg.exe PID 852 wrote to memory of 544 852 cmd.exe reg.exe PID 1832 wrote to memory of 1612 1832 PO#4018-308875.exe hjfufkimd.exe PID 1832 wrote to memory of 1612 1832 PO#4018-308875.exe hjfufkimd.exe PID 1832 wrote to memory of 1612 1832 PO#4018-308875.exe hjfufkimd.exe PID 1832 wrote to memory of 1612 1832 PO#4018-308875.exe hjfufkimd.exe PID 1832 wrote to memory of 1612 1832 PO#4018-308875.exe hjfufkimd.exe PID 1832 wrote to memory of 1612 1832 PO#4018-308875.exe hjfufkimd.exe PID 1832 wrote to memory of 1612 1832 PO#4018-308875.exe hjfufkimd.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe PID 1612 wrote to memory of 436 1612 hjfufkimd.exe InstallUtil.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\PO#4018-308875.exe"C:\Users\Admin\AppData\Local\Temp\PO#4018-308875.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 "erwtvsfvc" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\hjfufkimd.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "erwtvsfvc" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\hjfufkimd.exe"3⤵
- Adds Run key to start application
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C:\Users\Admin\AppData\Roaming\hjfufkimd.exe"C:\Users\Admin\AppData\Roaming\hjfufkimd.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
Loading Replay Monitor...
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\hjfufkimd.exeMD5
26b17b353c8950ca0a55e1ea21678d9e
SHA1c5f2e80f53a312bd1b8dd3bba438af27a4ba44e3
SHA25643bdef53f8ff0d262c2086a46c66d76f8c5e2b9df085959c70a5a3c679474767
SHA512b90a04a218ae54201a4ab25848c91dc197c829c90beb4de4b8cc5f9f54928a962151129796181b9dbf48da1be6bb7294f878e3bdf020373b9df2c8a759e8be23
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C:\Users\Admin\AppData\Roaming\hjfufkimd.exeMD5
26b17b353c8950ca0a55e1ea21678d9e
SHA1c5f2e80f53a312bd1b8dd3bba438af27a4ba44e3
SHA25643bdef53f8ff0d262c2086a46c66d76f8c5e2b9df085959c70a5a3c679474767
SHA512b90a04a218ae54201a4ab25848c91dc197c829c90beb4de4b8cc5f9f54928a962151129796181b9dbf48da1be6bb7294f878e3bdf020373b9df2c8a759e8be23
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\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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\Users\Admin\AppData\Roaming\hjfufkimd.exeMD5
26b17b353c8950ca0a55e1ea21678d9e
SHA1c5f2e80f53a312bd1b8dd3bba438af27a4ba44e3
SHA25643bdef53f8ff0d262c2086a46c66d76f8c5e2b9df085959c70a5a3c679474767
SHA512b90a04a218ae54201a4ab25848c91dc197c829c90beb4de4b8cc5f9f54928a962151129796181b9dbf48da1be6bb7294f878e3bdf020373b9df2c8a759e8be23
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memory/436-30-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/436-32-0x00000000003B0000-0x00000000003B5000-memory.dmpFilesize
20KB
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memory/436-29-0x0000000073980000-0x000000007406E000-memory.dmpFilesize
6.9MB
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memory/436-33-0x00000000003C0000-0x00000000003D9000-memory.dmpFilesize
100KB
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memory/436-34-0x00000000003E0000-0x00000000003E3000-memory.dmpFilesize
12KB
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memory/436-27-0x000000000041E792-mapping.dmp
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memory/436-26-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/436-35-0x0000000004850000-0x0000000004851000-memory.dmpFilesize
4KB
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memory/544-9-0x0000000000000000-mapping.dmp
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memory/852-8-0x0000000000000000-mapping.dmp
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memory/1612-20-0x0000000004B60000-0x0000000004B61000-memory.dmpFilesize
4KB
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memory/1612-22-0x00000000005D0000-0x00000000005D1000-memory.dmpFilesize
4KB
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memory/1612-21-0x0000000000270000-0x000000000027B000-memory.dmpFilesize
44KB
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memory/1612-25-0x0000000004B61000-0x0000000004B62000-memory.dmpFilesize
4KB
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memory/1612-16-0x0000000000E60000-0x0000000000E61000-memory.dmpFilesize
4KB
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memory/1612-15-0x0000000073980000-0x000000007406E000-memory.dmpFilesize
6.9MB
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memory/1612-12-0x0000000000000000-mapping.dmp
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memory/1832-2-0x0000000073980000-0x000000007406E000-memory.dmpFilesize
6.9MB
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memory/1832-10-0x0000000004951000-0x0000000004952000-memory.dmpFilesize
4KB
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memory/1832-7-0x0000000004950000-0x0000000004951000-memory.dmpFilesize
4KB
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memory/1832-6-0x00000000003B0000-0x00000000003B1000-memory.dmpFilesize
4KB
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memory/1832-5-0x0000000000380000-0x000000000039E000-memory.dmpFilesize
120KB
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memory/1832-3-0x0000000001340000-0x0000000001341000-memory.dmpFilesize
4KB