Analysis
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max time kernel
189s -
max time network
202s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
20-02-2022 01:21
Static task
static1
Behavioral task
behavioral1
Sample
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe
Resource
win10v2004-en-20220112
General
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Target
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe
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Size
72KB
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MD5
777d9d83da40ed1481d9f0646b4b0a3d
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SHA1
6c817e64a04620eddd9b73ed894a76afac484b94
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SHA256
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4
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SHA512
f0ae9cd13ec35b7cfa4dda91637c683b1074faff99fbff8448b8dd90fac2c0be1fa2304f90bbea4695fa196724f36767f2f40f5a1e6a95e3cf6c14ecea2754b6
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html
ryuk
Extracted
C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html
ryuk
Signatures
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Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
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Executes dropped EXE 1 IoCs
Processes:
hlxbvcB.exepid process 1752 hlxbvcB.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exehlxbvcB.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation hlxbvcB.exe -
Drops file in Windows directory 1 IoCs
Processes:
svchost.exedescription ioc process File opened for modification C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\DeliveryOptimization\State\keyValueLKG.dat svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
MusNotifyIcon.exedescription ioc process Key opened \Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0 MusNotifyIcon.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz MusNotifyIcon.exe -
Modifies data under HKEY_USERS 49 IoCs
Processes:
svchost.exedescription ioc process Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLinkLocalBytes = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\Geo_EndpointFullUri = "https://geo.prod.do.dsp.mp.microsoft.com/geo" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LinkLocalConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4276" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "0" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Settings svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkCnt = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CDNConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LANConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkUsageBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadRatePct = "100" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthlyUploadRestriction = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadCount = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.284093" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\FrDownloadRatePct = "90" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.164353" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyLanBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\GeoVersion_EndpointFullUri = "https://geover.prod.do.dsp.mp.microsoft.com/geoversion" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CacheSizeBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PeerInfoCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadCount = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.136488" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DownloadMode_BackCompat = "1" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLanBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyGroupBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrCnt = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132899708590701098" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "1" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\InternetConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadPendingCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadPendingCount = "0" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthID = "2" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkUsageBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\GroupConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\BkDownloadRatePct = "45" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4160" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DODownloadMode = "1" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyInternetBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyInternetBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCacheHostBytes = "0" svchost.exe -
Runs net.exe
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Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exehlxbvcB.exepid process 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe 1752 hlxbvcB.exe 1752 hlxbvcB.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exehlxbvcB.exedescription pid process Token: SeBackupPrivilege 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe Token: SeBackupPrivilege 1752 hlxbvcB.exe -
Suspicious use of WriteProcessMemory 39 IoCs
Processes:
ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exenet.exenet.exenet.exenet.exehlxbvcB.exenet.exenet.exedescription pid process target process PID 1860 wrote to memory of 1752 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe hlxbvcB.exe PID 1860 wrote to memory of 1752 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe hlxbvcB.exe PID 1860 wrote to memory of 1752 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe hlxbvcB.exe PID 1860 wrote to memory of 3728 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3728 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3728 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3552 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3552 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3552 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3288 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3288 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 3288 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 2236 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 2236 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 1860 wrote to memory of 2236 1860 ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe net.exe PID 3552 wrote to memory of 3448 3552 net.exe net1.exe PID 3552 wrote to memory of 3448 3552 net.exe net1.exe PID 3552 wrote to memory of 3448 3552 net.exe net1.exe PID 2236 wrote to memory of 2452 2236 net.exe net1.exe PID 2236 wrote to memory of 2452 2236 net.exe net1.exe PID 2236 wrote to memory of 2452 2236 net.exe net1.exe PID 3288 wrote to memory of 3040 3288 net.exe net1.exe PID 3288 wrote to memory of 3040 3288 net.exe net1.exe PID 3288 wrote to memory of 3040 3288 net.exe net1.exe PID 3728 wrote to memory of 2580 3728 net.exe net1.exe PID 3728 wrote to memory of 2580 3728 net.exe net1.exe PID 3728 wrote to memory of 2580 3728 net.exe net1.exe PID 1752 wrote to memory of 4236 1752 hlxbvcB.exe net.exe PID 1752 wrote to memory of 4236 1752 hlxbvcB.exe net.exe PID 1752 wrote to memory of 4236 1752 hlxbvcB.exe net.exe PID 4236 wrote to memory of 4288 4236 net.exe net1.exe PID 4236 wrote to memory of 4288 4236 net.exe net1.exe PID 4236 wrote to memory of 4288 4236 net.exe net1.exe PID 1752 wrote to memory of 4312 1752 hlxbvcB.exe net.exe PID 1752 wrote to memory of 4312 1752 hlxbvcB.exe net.exe PID 1752 wrote to memory of 4312 1752 hlxbvcB.exe net.exe PID 4312 wrote to memory of 4376 4312 net.exe net1.exe PID 4312 wrote to memory of 4376 4312 net.exe net1.exe PID 4312 wrote to memory of 4376 4312 net.exe net1.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe"C:\Users\Admin\AppData\Local\Temp\ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1860 -
C:\Users\Admin\AppData\Local\Temp\hlxbvcB.exe"C:\Users\Admin\AppData\Local\Temp\hlxbvcB.exe" 8 LAN2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1752 -
C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y3⤵
- Suspicious use of WriteProcessMemory
PID:4236 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "audioendpointbuilder" /y4⤵PID:4288
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "samss" /y3⤵
- Suspicious use of WriteProcessMemory
PID:4312 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "samss" /y4⤵PID:4376
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y2⤵
- Suspicious use of WriteProcessMemory
PID:3552 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "audioendpointbuilder" /y3⤵PID:3448
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y2⤵
- Suspicious use of WriteProcessMemory
PID:3728 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "audioendpointbuilder" /y3⤵PID:2580
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "samss" /y2⤵
- Suspicious use of WriteProcessMemory
PID:3288 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "samss" /y3⤵PID:3040
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "samss" /y2⤵
- Suspicious use of WriteProcessMemory
PID:2236 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "samss" /y3⤵PID:2452
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C:\Windows\system32\MusNotifyIcon.exe%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 131⤵
- Checks processor information in registry
PID:2492
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
PID:2604
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys\08e575673cce10c72090304839888e02_0d751396-3164-4736-b931-4f59d47ff1f2
MD593a5aadeec082ffc1bca5aa27af70f52
SHA147a92aee3ea4d1c1954ed4da9f86dd79d9277d31
SHA256a1a21799e98f97f271657ce656076f33dcb020d9370f1f2671d783cafd230294
SHA512df388c8d83e779e006d6311b2046fcf9259ec33d379fc0e2c6a4b6b90418f587a12c5c23acd488413a02568ca2d3effe04608ec7c791925c7ed53dc71093ca45
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MD5
62429300ef3f095ae37a58b737c60ab5
SHA16036c4e454eb6fed69504e7a5ae2227153757e93
SHA256dbcb799862fb04f74c3a3fd880a35a3f87c1a5d87ee57235f84c33bf51a97b46
SHA512028db4e3928a3d7a4eb7377a423d700e1c9c52c0da147690ae3d373274e08b20896d4732b1e647f441be74fce9dafa5f17434f79bdb977595a635a7cafd182a4
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MD5
777d9d83da40ed1481d9f0646b4b0a3d
SHA16c817e64a04620eddd9b73ed894a76afac484b94
SHA256ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4
SHA512f0ae9cd13ec35b7cfa4dda91637c683b1074faff99fbff8448b8dd90fac2c0be1fa2304f90bbea4695fa196724f36767f2f40f5a1e6a95e3cf6c14ecea2754b6
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MD5
777d9d83da40ed1481d9f0646b4b0a3d
SHA16c817e64a04620eddd9b73ed894a76afac484b94
SHA256ddc41e15773815f293b5a61e505e37dff0e05e9e195e4dd2e2eaab932b9582d4
SHA512f0ae9cd13ec35b7cfa4dda91637c683b1074faff99fbff8448b8dd90fac2c0be1fa2304f90bbea4695fa196724f36767f2f40f5a1e6a95e3cf6c14ecea2754b6