Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
20-01-2021 14:44
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
765KB
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MD5
d90049e2aff303588e499820e0d9078c
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SHA1
1153f298db7e6aeed9c3a55c907dfa474ae9155f
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SHA256
761e77be2bbf6089f04b1901c44548bd4ff5ac873a74b1ca0e0604bb902eff22
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SHA512
0ab4d1ccd24fa3174750b69f929c8dc34334f88941f1708e5edc2fdb7498636aa0c441bb9bb7e54a1ebb246500ddbfddbdbccfd4fe1ec7ee16c14229af1f9e89
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:
gfrdeswaq.exeInstallUtil.exepid process 3448 gfrdeswaq.exe 3968 InstallUtil.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
reg.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\olkkmmxxzaa = "C:\\Users\\Admin\\AppData\\Roaming\\gfrdeswaq.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:
gfrdeswaq.exedescription pid process target process PID 3448 set thread context of 3968 3448 gfrdeswaq.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 20 IoCs
Processes:
PO#4018-308875.pdf.exegfrdeswaq.exeInstallUtil.exepid process 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 636 PO#4018-308875.pdf.exe 3448 gfrdeswaq.exe 3448 gfrdeswaq.exe 3968 InstallUtil.exe 3968 InstallUtil.exe 3968 InstallUtil.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
InstallUtil.exepid process 3968 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
PO#4018-308875.pdf.exegfrdeswaq.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 636 PO#4018-308875.pdf.exe Token: SeDebugPrivilege 3448 gfrdeswaq.exe Token: SeDebugPrivilege 3968 InstallUtil.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
PO#4018-308875.pdf.execmd.exegfrdeswaq.exedescription pid process target process PID 636 wrote to memory of 3172 636 PO#4018-308875.pdf.exe cmd.exe PID 636 wrote to memory of 3172 636 PO#4018-308875.pdf.exe cmd.exe PID 636 wrote to memory of 3172 636 PO#4018-308875.pdf.exe cmd.exe PID 3172 wrote to memory of 200 3172 cmd.exe reg.exe PID 3172 wrote to memory of 200 3172 cmd.exe reg.exe PID 3172 wrote to memory of 200 3172 cmd.exe reg.exe PID 636 wrote to memory of 3448 636 PO#4018-308875.pdf.exe gfrdeswaq.exe PID 636 wrote to memory of 3448 636 PO#4018-308875.pdf.exe gfrdeswaq.exe PID 636 wrote to memory of 3448 636 PO#4018-308875.pdf.exe gfrdeswaq.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.exe InstallUtil.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.exe InstallUtil.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.exe InstallUtil.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.exe InstallUtil.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.exe InstallUtil.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.exe InstallUtil.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.exe InstallUtil.exe PID 3448 wrote to memory of 3968 3448 gfrdeswaq.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⤵
- 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 "olkkmmxxzaa" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\gfrdeswaq.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "olkkmmxxzaa" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\gfrdeswaq.exe"3⤵
- Adds Run key to start application
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C:\Users\Admin\AppData\Roaming\gfrdeswaq.exe"C:\Users\Admin\AppData\Roaming\gfrdeswaq.exe"2⤵
- Executes dropped EXE
- 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\gfrdeswaq.exeMD5
d90049e2aff303588e499820e0d9078c
SHA11153f298db7e6aeed9c3a55c907dfa474ae9155f
SHA256761e77be2bbf6089f04b1901c44548bd4ff5ac873a74b1ca0e0604bb902eff22
SHA5120ab4d1ccd24fa3174750b69f929c8dc34334f88941f1708e5edc2fdb7498636aa0c441bb9bb7e54a1ebb246500ddbfddbdbccfd4fe1ec7ee16c14229af1f9e89
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C:\Users\Admin\AppData\Roaming\gfrdeswaq.exeMD5
d90049e2aff303588e499820e0d9078c
SHA11153f298db7e6aeed9c3a55c907dfa474ae9155f
SHA256761e77be2bbf6089f04b1901c44548bd4ff5ac873a74b1ca0e0604bb902eff22
SHA5120ab4d1ccd24fa3174750b69f929c8dc34334f88941f1708e5edc2fdb7498636aa0c441bb9bb7e54a1ebb246500ddbfddbdbccfd4fe1ec7ee16c14229af1f9e89
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memory/200-11-0x0000000000000000-mapping.dmp
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memory/636-9-0x00000000054E0000-0x00000000054E1000-memory.dmpFilesize
4KB
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memory/636-2-0x0000000073F80000-0x000000007466E000-memory.dmpFilesize
6.9MB
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memory/636-8-0x0000000007C10000-0x0000000007C11000-memory.dmpFilesize
4KB
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memory/636-12-0x00000000054E1000-0x00000000054E2000-memory.dmpFilesize
4KB
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memory/636-7-0x0000000005220000-0x0000000005221000-memory.dmpFilesize
4KB
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memory/636-6-0x0000000002CA0000-0x0000000002CBE000-memory.dmpFilesize
120KB
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memory/636-5-0x0000000005260000-0x0000000005261000-memory.dmpFilesize
4KB
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memory/636-3-0x0000000000970000-0x0000000000971000-memory.dmpFilesize
4KB
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memory/3172-10-0x0000000000000000-mapping.dmp
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memory/3448-22-0x0000000005410000-0x0000000005411000-memory.dmpFilesize
4KB
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memory/3448-13-0x0000000000000000-mapping.dmp
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memory/3448-25-0x00000000052D0000-0x00000000052D1000-memory.dmpFilesize
4KB
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memory/3448-26-0x0000000005411000-0x0000000005412000-memory.dmpFilesize
4KB
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memory/3448-24-0x00000000052C0000-0x00000000052CB000-memory.dmpFilesize
44KB
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memory/3448-16-0x0000000073F80000-0x000000007466E000-memory.dmpFilesize
6.9MB
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memory/3968-31-0x0000000073F80000-0x000000007466E000-memory.dmpFilesize
6.9MB
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memory/3968-28-0x000000000041E792-mapping.dmp
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memory/3968-32-0x0000000000360000-0x0000000000398000-memory.dmpFilesize
224KB
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memory/3968-34-0x0000000004FC0000-0x0000000004FC1000-memory.dmpFilesize
4KB
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memory/3968-37-0x0000000004B10000-0x0000000004B11000-memory.dmpFilesize
4KB
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memory/3968-38-0x0000000004E00000-0x0000000004E05000-memory.dmpFilesize
20KB
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memory/3968-39-0x0000000004AF0000-0x0000000004AF1000-memory.dmpFilesize
4KB
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memory/3968-40-0x0000000004FA0000-0x0000000004FB9000-memory.dmpFilesize
100KB
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memory/3968-41-0x00000000058D0000-0x00000000058D3000-memory.dmpFilesize
12KB