Analysis
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max time kernel
144s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
15/11/2022, 11:37
Static task
static1
Behavioral task
behavioral1
Sample
REVISED PO -TSTC22-1011_Pdf.exe
Resource
win7-20221111-en
General
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Target
REVISED PO -TSTC22-1011_Pdf.exe
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Size
800KB
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MD5
bd101f1d805750bd4b9fdeeb546efcc0
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SHA1
fa881fdee6fbff34055e00737a3766fcd1493a1b
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SHA256
e23943f7a0d3e8bfcb2ea6debdd990281fd94e32629db00f12b8208b668bed52
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SHA512
cdf9db01870ead7062166a7b2075620d4aa747b0716078498e917bbb48f6729a32902f49a9d1071d67520752e7e9bffe2d2a7effa304a9acbcea5fa841e40362
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SSDEEP
12288:SKfxkcehk1CEunCU8gJwWcGfqefprSBDgM/A:NLV1CEuCURT/mDW
Malware Config
Extracted
nanocore
1.2.2.0
henzy.ddns.net:2828
88894717-40ab-4845-8948-707139163d90
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activate_away_mode
true
- backup_connection_host
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2022-05-20T06:47:18.240303436Z
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bypass_user_account_control
false
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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
2828
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default_group
User22
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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
88894717-40ab-4845-8948-707139163d90
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
henzy.ddns.net
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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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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation REVISED PO -TSTC22-1011_Pdf.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DHCP Subsystem = "C:\\Program Files (x86)\\DHCP Subsystem\\dhcpss.exe" REVISED PO -TSTC22-1011_Pdf.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA REVISED PO -TSTC22-1011_Pdf.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3828 set thread context of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe REVISED PO -TSTC22-1011_Pdf.exe File opened for modification C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe REVISED PO -TSTC22-1011_Pdf.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3720 schtasks.exe 2548 schtasks.exe 4960 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
pid Process 3828 REVISED PO -TSTC22-1011_Pdf.exe 3828 REVISED PO -TSTC22-1011_Pdf.exe 3828 REVISED PO -TSTC22-1011_Pdf.exe 3828 REVISED PO -TSTC22-1011_Pdf.exe 3916 powershell.exe 3916 powershell.exe 1420 REVISED PO -TSTC22-1011_Pdf.exe 1420 REVISED PO -TSTC22-1011_Pdf.exe 1420 REVISED PO -TSTC22-1011_Pdf.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 1420 REVISED PO -TSTC22-1011_Pdf.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 3828 REVISED PO -TSTC22-1011_Pdf.exe Token: SeDebugPrivilege 3916 powershell.exe Token: SeDebugPrivilege 1420 REVISED PO -TSTC22-1011_Pdf.exe -
Suspicious use of WriteProcessMemory 23 IoCs
description pid Process procid_target PID 3828 wrote to memory of 3916 3828 REVISED PO -TSTC22-1011_Pdf.exe 92 PID 3828 wrote to memory of 3916 3828 REVISED PO -TSTC22-1011_Pdf.exe 92 PID 3828 wrote to memory of 3916 3828 REVISED PO -TSTC22-1011_Pdf.exe 92 PID 3828 wrote to memory of 3720 3828 REVISED PO -TSTC22-1011_Pdf.exe 94 PID 3828 wrote to memory of 3720 3828 REVISED PO -TSTC22-1011_Pdf.exe 94 PID 3828 wrote to memory of 3720 3828 REVISED PO -TSTC22-1011_Pdf.exe 94 PID 3828 wrote to memory of 1408 3828 REVISED PO -TSTC22-1011_Pdf.exe 96 PID 3828 wrote to memory of 1408 3828 REVISED PO -TSTC22-1011_Pdf.exe 96 PID 3828 wrote to memory of 1408 3828 REVISED PO -TSTC22-1011_Pdf.exe 96 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 3828 wrote to memory of 1420 3828 REVISED PO -TSTC22-1011_Pdf.exe 97 PID 1420 wrote to memory of 2548 1420 REVISED PO -TSTC22-1011_Pdf.exe 99 PID 1420 wrote to memory of 2548 1420 REVISED PO -TSTC22-1011_Pdf.exe 99 PID 1420 wrote to memory of 2548 1420 REVISED PO -TSTC22-1011_Pdf.exe 99 PID 1420 wrote to memory of 4960 1420 REVISED PO -TSTC22-1011_Pdf.exe 101 PID 1420 wrote to memory of 4960 1420 REVISED PO -TSTC22-1011_Pdf.exe 101 PID 1420 wrote to memory of 4960 1420 REVISED PO -TSTC22-1011_Pdf.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3828 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uuPTAGHRzGi.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3916
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uuPTAGHRzGi" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8B29.tmp"2⤵
- Creates scheduled task(s)
PID:3720
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C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"2⤵PID:1408
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C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_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
- Suspicious use of WriteProcessMemory
PID:1420 -
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "DHCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8F20.tmp"3⤵
- Creates scheduled task(s)
PID:2548
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "DHCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8F70.tmp"3⤵
- Creates scheduled task(s)
PID:4960
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1KB
MD55341da50d695c0d6bb8c34e0808280b9
SHA1db363abbcc306bd731d2402a8e8048457494c8b4
SHA2566dcf8069c0894cc17214b286a11d1f59c9752331f730ca0b0a631b50654e996d
SHA5129c4fa299bdaaa0975a6eac0472d21e037ae8b50cdeb5f32ed9581f4a290eb2b106266db24a417f1d88335ca9ed1e18863c75f405a8fdc19c64fda47c5b7f67c4
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Filesize
1KB
MD5009102eae052bce5463af965c53565c9
SHA1f6291373c2ebf187e3724dc7d4f9c7baf57173bb
SHA256db50cd26a722c0e7c0bf9810f8a24fb79db2c28dee5e5473b32cdafb4c440421
SHA5126103132503be7601ee96a1f75a83923c436881983d2f451cab298a3376f88b5614e5567c088364c5c50ad03f79d121e174b86c285b2a846d73bf2bd39399a2cd
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Filesize
1KB
MD52f26d92c1eeead3896820e56ec46f6f1
SHA1d95533b61eed7d89e4ada56bc566d60e42ac1f61
SHA25699a158463ce40c750bad6991ae1fceece305a0dbf8e209dd7147b5d539756bfa
SHA5126c1ed12d5e1afcd9e7f327e0153786fd8594f75a995f341c408ef014e69917452a9fe99c511f0249aceb57b3045b707f1fd3f404e4086cfbf0aadcb3318db892