Analysis
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max time kernel
163s -
max time network
162s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
11-10-2022 14:26
Static task
static1
Behavioral task
behavioral1
Sample
21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe
Resource
win7-20220812-en
General
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Target
21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe
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Size
1.2MB
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MD5
677f95c0008638e651565531ae57bf20
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SHA1
c228408d6fc7abb69aead81461ec5c42a8fbf94a
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SHA256
21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9
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SHA512
46a532cefcbaaa10d78b22ba2233070e488b806a575e613921db7a300876be87f93a71850ab284c3187528f7b25461e77566fbeea476722fc1d2e2fb1300891e
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SSDEEP
24576:9jvKABunTHw1zJisz4xtYuabqStzDTStrZwEctK//:9jvP8nMrisz4cuutPu1iEv
Malware Config
Extracted
nanocore
1.2.2.0
steamserver285.ddns.net:1337
127.0.0.1:1337
291335a3-aac7-44d7-98ce-d2e9e600616d
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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
2015-06-04T14:46:47.365938736Z
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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
1337
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default_group
Default
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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
291335a3-aac7-44d7-98ce-d2e9e600616d
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
steamserver285.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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Executes dropped EXE 4 IoCs
Processes:
Steam.exeSteam.exeSteam.exeSteam.exepid process 60 Steam.exe 728 Steam.exe 4724 Steam.exe 3308 Steam.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation 21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe -
Drops startup file 1 IoCs
Processes:
21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam.lnk 21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Steam.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\AGP Monitor = "C:\\Program Files (x86)\\AGP Monitor\\agpmon.exe" Steam.exe -
Processes:
Steam.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA Steam.exe -
Suspicious use of SetThreadContext 6 IoCs
Processes:
Steam.exedescription pid process target process PID 60 set thread context of 728 60 Steam.exe Steam.exe PID 60 set thread context of 728 60 Steam.exe Steam.exe PID 60 set thread context of 4724 60 Steam.exe Steam.exe PID 60 set thread context of 4724 60 Steam.exe Steam.exe PID 60 set thread context of 3308 60 Steam.exe Steam.exe PID 60 set thread context of 3308 60 Steam.exe Steam.exe -
Drops file in Program Files directory 2 IoCs
Processes:
Steam.exedescription ioc process File created C:\Program Files (x86)\AGP Monitor\agpmon.exe Steam.exe File opened for modification C:\Program Files (x86)\AGP Monitor\agpmon.exe Steam.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 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 12 IoCs
Processes:
Steam.exeSteam.exepid process 60 Steam.exe 60 Steam.exe 60 Steam.exe 60 Steam.exe 60 Steam.exe 60 Steam.exe 3308 Steam.exe 3308 Steam.exe 3308 Steam.exe 3308 Steam.exe 3308 Steam.exe 3308 Steam.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
Steam.exepid process 3308 Steam.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exeSteam.exeSteam.exedescription pid process Token: SeDebugPrivilege 4808 21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe Token: SeDebugPrivilege 60 Steam.exe Token: SeDebugPrivilege 3308 Steam.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exeSteam.exeSteam.exedescription pid process target process PID 4808 wrote to memory of 60 4808 21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe Steam.exe PID 4808 wrote to memory of 60 4808 21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe Steam.exe PID 4808 wrote to memory of 60 4808 21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe Steam.exe PID 60 wrote to memory of 728 60 Steam.exe Steam.exe PID 60 wrote to memory of 728 60 Steam.exe Steam.exe PID 60 wrote to memory of 728 60 Steam.exe Steam.exe PID 60 wrote to memory of 728 60 Steam.exe Steam.exe PID 60 wrote to memory of 728 60 Steam.exe Steam.exe PID 60 wrote to memory of 728 60 Steam.exe Steam.exe PID 60 wrote to memory of 728 60 Steam.exe Steam.exe PID 60 wrote to memory of 4724 60 Steam.exe Steam.exe PID 60 wrote to memory of 4724 60 Steam.exe Steam.exe PID 60 wrote to memory of 4724 60 Steam.exe Steam.exe PID 60 wrote to memory of 4724 60 Steam.exe Steam.exe PID 60 wrote to memory of 4724 60 Steam.exe Steam.exe PID 60 wrote to memory of 4724 60 Steam.exe Steam.exe PID 60 wrote to memory of 4724 60 Steam.exe Steam.exe PID 60 wrote to memory of 3308 60 Steam.exe Steam.exe PID 60 wrote to memory of 3308 60 Steam.exe Steam.exe PID 60 wrote to memory of 3308 60 Steam.exe Steam.exe PID 60 wrote to memory of 3308 60 Steam.exe Steam.exe PID 60 wrote to memory of 3308 60 Steam.exe Steam.exe PID 60 wrote to memory of 3308 60 Steam.exe Steam.exe PID 60 wrote to memory of 3308 60 Steam.exe Steam.exe PID 3308 wrote to memory of 736 3308 Steam.exe schtasks.exe PID 3308 wrote to memory of 736 3308 Steam.exe schtasks.exe PID 3308 wrote to memory of 736 3308 Steam.exe schtasks.exe PID 3308 wrote to memory of 3664 3308 Steam.exe schtasks.exe PID 3308 wrote to memory of 3664 3308 Steam.exe schtasks.exe PID 3308 wrote to memory of 3664 3308 Steam.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe"C:\Users\Admin\AppData\Local\Temp\21d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9.exe"1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exe"C:\Users\Admin\AppData\Roaming\Steam\Steam.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\Roaming\Steam\Steam.exeC:\Users\Admin\AppData\Roaming\Steam\Steam.exe3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exeC:\Users\Admin\AppData\Roaming\Steam\Steam.exe3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exeC:\Users\Admin\AppData\Roaming\Steam\Steam.exe3⤵
- Executes dropped EXE
- 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
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "AGP Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp74E.tmp"4⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "AGP Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp933.tmp"4⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp74E.tmpFilesize
1KB
MD563ad7f1946186db1a507e0473d104d76
SHA1d01fb868dc8b3b218300036cc0acb6334e6b863b
SHA2564055777ede1c6cd93ee2d281024e2ad740e4cd961ccd758f30a524537a519df7
SHA512c6c121817cb06ca68da939c3128da8385c46e51728a9cd81ed8e91e084896312238749e49accb52e4d7a55d6ec1c54600b95f94370331ae35faa69b388fbec6e
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C:\Users\Admin\AppData\Local\Temp\tmp933.tmpFilesize
1KB
MD5157cd55403665c49c9fd3ca1196c4397
SHA14feed6e606b41bb617274471349582963182756b
SHA25649d903f84313feb16bd189c58b6c206f98b05da00ea0da881e2ff0c893b6ba5e
SHA512bea7e3caa9c37cadd772a6d3ee0d9ed47de6b3e880cd58649be2939cacd00f70d4edc1ad177e432539267bb520094d9cda3f781cdfc69122f3775242321c11b8
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam.lnkFilesize
943B
MD58b503b198de6a2215aaa5123dcaef534
SHA1f8ac7444d5797c5be4aaf661c09ff088e37873a4
SHA2566cc462545b74031d291174c7a9a3d7251631d113e029d7146dfebb8d2d3daccb
SHA5126e7b92a87b023e1e73ecbd3c4f9fafd9448805813eee5414535d13390762a841a2dce30d31c7c34368c2d06828a43b93a6192116eee3d4297fe20a955db4ee23
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exeFilesize
1.2MB
MD5677f95c0008638e651565531ae57bf20
SHA1c228408d6fc7abb69aead81461ec5c42a8fbf94a
SHA25621d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9
SHA51246a532cefcbaaa10d78b22ba2233070e488b806a575e613921db7a300876be87f93a71850ab284c3187528f7b25461e77566fbeea476722fc1d2e2fb1300891e
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exeFilesize
1.2MB
MD5677f95c0008638e651565531ae57bf20
SHA1c228408d6fc7abb69aead81461ec5c42a8fbf94a
SHA25621d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9
SHA51246a532cefcbaaa10d78b22ba2233070e488b806a575e613921db7a300876be87f93a71850ab284c3187528f7b25461e77566fbeea476722fc1d2e2fb1300891e
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exeFilesize
1.2MB
MD5677f95c0008638e651565531ae57bf20
SHA1c228408d6fc7abb69aead81461ec5c42a8fbf94a
SHA25621d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9
SHA51246a532cefcbaaa10d78b22ba2233070e488b806a575e613921db7a300876be87f93a71850ab284c3187528f7b25461e77566fbeea476722fc1d2e2fb1300891e
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exeFilesize
1.2MB
MD5677f95c0008638e651565531ae57bf20
SHA1c228408d6fc7abb69aead81461ec5c42a8fbf94a
SHA25621d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9
SHA51246a532cefcbaaa10d78b22ba2233070e488b806a575e613921db7a300876be87f93a71850ab284c3187528f7b25461e77566fbeea476722fc1d2e2fb1300891e
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C:\Users\Admin\AppData\Roaming\Steam\Steam.exeFilesize
1.2MB
MD5677f95c0008638e651565531ae57bf20
SHA1c228408d6fc7abb69aead81461ec5c42a8fbf94a
SHA25621d9c4b4afce65e888e3332312f157078b7e2edcf50ca65be1d9e198d919bec9
SHA51246a532cefcbaaa10d78b22ba2233070e488b806a575e613921db7a300876be87f93a71850ab284c3187528f7b25461e77566fbeea476722fc1d2e2fb1300891e
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memory/60-138-0x00000000749E0000-0x0000000074F91000-memory.dmpFilesize
5.7MB
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memory/60-134-0x0000000000000000-mapping.dmp
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memory/60-220-0x00000000749E0000-0x0000000074F91000-memory.dmpFilesize
5.7MB
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memory/728-143-0x0000000000000000-mapping.dmp
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memory/728-140-0x0000000000400000-0x00000000004AE000-memory.dmpFilesize
696KB
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memory/736-216-0x0000000000000000-mapping.dmp
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memory/3308-215-0x00000000749E0000-0x0000000074F91000-memory.dmpFilesize
5.7MB
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memory/3308-157-0x0000000000000000-mapping.dmp
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memory/3308-221-0x00000000749E0000-0x0000000074F91000-memory.dmpFilesize
5.7MB
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memory/3664-218-0x0000000000000000-mapping.dmp
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memory/4724-150-0x0000000000000000-mapping.dmp
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memory/4808-132-0x00000000749E0000-0x0000000074F91000-memory.dmpFilesize
5.7MB
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memory/4808-137-0x00000000749E0000-0x0000000074F91000-memory.dmpFilesize
5.7MB
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memory/4808-133-0x00000000749E0000-0x0000000074F91000-memory.dmpFilesize
5.7MB