Analysis
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max time kernel
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max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
21-06-2024 12:50
Behavioral task
behavioral1
Sample
Nursultan.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
Nursultan.exe
Resource
win10v2004-20240611-en
General
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Target
Nursultan.exe
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Size
1.4MB
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MD5
1b6293c7f0dfed044b0eba8b98b0faff
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SHA1
e5705cbb256bb0b1a350e1b9fb71c1a1e4ac605a
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SHA256
fe014092ae92e8372849bed9f5cf33946e8d918bdc50feddc1316bc837414ba8
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SHA512
694e9afd04089172c991a712849049545459ceeed99780a6f012ca086fa2d1b70bbd627534b85b1797f4be22feda55e46e6966fe96a2ee66effdeeaa2eb650a5
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SSDEEP
24576:d2G/nvxW3WckpJWjXbNQsVZy8v8BQSsZWcJ48z2AB4:dbA3wvW+sVZy8fZWmz9
Malware Config
Extracted
44caliber
https://discord.com/api/webhooks/1253689379948593173/lzPh5dDD7ETWYLRPMt2M_Ml82yS42YxolYTwBWldi4NXuLOvpMPhz7AlFtFln1RxcqaC
Signatures
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Process spawned unexpected child process 18 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exedescription pid pid_target process target process Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2384 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2964 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1012 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3812 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1560 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1632 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 5008 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 5112 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4028 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1400 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3344 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4044 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3968 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4104 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2904 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 980 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3464 5108 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4992 5108 schtasks.exe -
Processes:
resource yara_rule behavioral2/memory/3404-1-0x00000000001C0000-0x000000000032C000-memory.dmp dcrat C:\Users\Admin\AppData\Local\Temp\svchost.exe dcrat C:\Hypercommon\ServercrtDll.exe dcrat behavioral2/memory/3620-39-0x0000000000300000-0x00000000003D6000-memory.dmp dcrat -
Checks computer location settings 2 TTPs 4 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
Nursultan.exesvchost.exeWScript.exeServercrtDll.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation Nursultan.exe Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation WScript.exe Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation ServercrtDll.exe -
Executes dropped EXE 4 IoCs
Processes:
svchost.exeexplorer.exeServercrtDll.exeWmiPrvSE.exepid process 4132 svchost.exe 5040 explorer.exe 3620 ServercrtDll.exe 4252 WmiPrvSE.exe -
Drops file in Program Files directory 4 IoCs
Processes:
ServercrtDll.exedescription ioc process File created C:\Program Files\Windows Media Player\Network Sharing\smss.exe ServercrtDll.exe File created C:\Program Files\Windows Media Player\Network Sharing\69ddcba757bf72 ServercrtDll.exe File created C:\Program Files\Windows Photo Viewer\dllhost.exe ServercrtDll.exe File created C:\Program Files\Windows Photo Viewer\5940a34987c991 ServercrtDll.exe -
Drops file in Windows directory 2 IoCs
Processes:
ServercrtDll.exedescription ioc process File created C:\Windows\Logs\DISM\sysmon.exe ServercrtDll.exe File created C:\Windows\Logs\DISM\121e5b5079f7c0 ServercrtDll.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 2 IoCs
Processes:
svchost.exeServercrtDll.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000_Classes\Local Settings svchost.exe Key created \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000_Classes\Local Settings ServercrtDll.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exepid process 2904 schtasks.exe 2964 schtasks.exe 1560 schtasks.exe 3344 schtasks.exe 4044 schtasks.exe 3968 schtasks.exe 4992 schtasks.exe 1012 schtasks.exe 4028 schtasks.exe 1632 schtasks.exe 3464 schtasks.exe 2384 schtasks.exe 3812 schtasks.exe 1400 schtasks.exe 4104 schtasks.exe 980 schtasks.exe 5008 schtasks.exe 5112 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 12 IoCs
Processes:
explorer.exeServercrtDll.exeWmiPrvSE.exepid process 5040 explorer.exe 5040 explorer.exe 3620 ServercrtDll.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe 4252 WmiPrvSE.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
WmiPrvSE.exepid process 4252 WmiPrvSE.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
explorer.exeServercrtDll.exeWmiPrvSE.exedescription pid process Token: SeDebugPrivilege 5040 explorer.exe Token: SeDebugPrivilege 3620 ServercrtDll.exe Token: SeDebugPrivilege 4252 WmiPrvSE.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
Nursultan.exesvchost.exeWScript.execmd.exeServercrtDll.execmd.exedescription pid process target process PID 3404 wrote to memory of 4132 3404 Nursultan.exe svchost.exe PID 3404 wrote to memory of 4132 3404 Nursultan.exe svchost.exe PID 3404 wrote to memory of 4132 3404 Nursultan.exe svchost.exe PID 3404 wrote to memory of 5040 3404 Nursultan.exe explorer.exe PID 3404 wrote to memory of 5040 3404 Nursultan.exe explorer.exe PID 4132 wrote to memory of 3740 4132 svchost.exe WScript.exe PID 4132 wrote to memory of 3740 4132 svchost.exe WScript.exe PID 4132 wrote to memory of 3740 4132 svchost.exe WScript.exe PID 3740 wrote to memory of 632 3740 WScript.exe cmd.exe PID 3740 wrote to memory of 632 3740 WScript.exe cmd.exe PID 3740 wrote to memory of 632 3740 WScript.exe cmd.exe PID 632 wrote to memory of 3620 632 cmd.exe ServercrtDll.exe PID 632 wrote to memory of 3620 632 cmd.exe ServercrtDll.exe PID 3620 wrote to memory of 1156 3620 ServercrtDll.exe cmd.exe PID 3620 wrote to memory of 1156 3620 ServercrtDll.exe cmd.exe PID 1156 wrote to memory of 4076 1156 cmd.exe w32tm.exe PID 1156 wrote to memory of 4076 1156 cmd.exe w32tm.exe PID 1156 wrote to memory of 4252 1156 cmd.exe WmiPrvSE.exe PID 1156 wrote to memory of 4252 1156 cmd.exe WmiPrvSE.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3404 -
C:\Users\Admin\AppData\Local\Temp\svchost.exe"C:\Users\Admin\AppData\Local\Temp\svchost.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4132 -
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe"3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3740 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Hypercommon\Udwe1ynNPaETo.bat" "4⤵
- Suspicious use of WriteProcessMemory
PID:632 -
C:\Hypercommon\ServercrtDll.exe"C:\Hypercommon\ServercrtDll.exe"5⤵
- Checks computer location settings
- Executes dropped EXE
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3620 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Tu0wvY8E19.bat"6⤵
- Suspicious use of WriteProcessMemory
PID:1156 -
C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:27⤵PID:4076
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C:\Hypercommon\WmiPrvSE.exe"C:\Hypercommon\WmiPrvSE.exe"7⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:4252
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C:\Users\Admin\AppData\Local\Temp\explorer.exe"C:\Users\Admin\AppData\Local\Temp\explorer.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5040
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Hypercommon\dllhost.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2384
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Hypercommon\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2964
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Hypercommon\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1012
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3812
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1560
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1632
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 5 /tr "'C:\Hypercommon\WmiPrvSE.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5008
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Hypercommon\WmiPrvSE.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5112
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 6 /tr "'C:\Hypercommon\WmiPrvSE.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4028
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Photo Viewer\dllhost.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1400
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3344
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Photo Viewer\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4044
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Media Player\Network Sharing\smss.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3968
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Windows Media Player\Network Sharing\smss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4104
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Media Player\Network Sharing\smss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2904
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmons" /sc MINUTE /mo 10 /tr "'C:\Windows\Logs\DISM\sysmon.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:980
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\Logs\DISM\sysmon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3464
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmons" /sc MINUTE /mo 12 /tr "'C:\Windows\Logs\DISM\sysmon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4992
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
828KB
MD5801d5740c780d09b1cc6d971ce8b280f
SHA1c7188e6f5998405d9dcbe83ce5d29267861be07d
SHA256b678bee38602b80df34f15e4555bb689e2eb6aef26f4c273d652c88f8825c33f
SHA5123296e517a6e0d6d3feb1f9d1544664b87589130d8a28f205626b2182ecdf333ff404f311ce69730d509e3072432024d3ed16db7068d35925375d9ecc5fe82b49
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Filesize
33B
MD51af82b77403306ff43f68bf7a0786c52
SHA1730a3bd4b524ffa024657c1fc27ffd82e25f3f81
SHA256e358e4c2fc541cc4e5614b1af9360a85a32fc53babbc57ecf5858fe71d334f96
SHA5120e33b779aceb2a42f5c42e07bcd3ac70a3dbb1fd2bbd4ae154979735f58eeaab5abea05cea682f4b73f6b54174ace8ac3046c6e9a84c4a729a6ed2bffa1a9ec1
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Filesize
201B
MD50f314eb5d52ce9cd85095eadff4f908c
SHA1272d25d43f789dd5fad479ab31e96214f82302b3
SHA256f17ea2d9d889ef2012cb57191ad3a1d2d3351df8539b4029d6f7080d66217e89
SHA512471b72558c045bc4acd276087d82e564aa7685373dea3ac3e90390df0f7f42ea06ae0254d3a4a9dc57312c7b1485916f4d470bd353b4b8c0b35d705573105f09
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Filesize
192B
MD59ca79dc0c2c3f23b5c966e9b50d42cf5
SHA1e0e2f37f32c0de1d0841adad917342bc30200ab9
SHA2569bfe873921b383109410ae82cbde0fcb3dd45523b914deeb411ade4df5cfaaad
SHA512442ae0f58b5b3f7a6d18569bd306d37e05514ceab6fe92c202784d40a67bbb0b4cbbcb7910efc451c8dde671951895a2c886967043e60fa524b9a75a5690b081
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Filesize
303KB
MD57d9282b8529bbb4ac06a3994fbcd0622
SHA1d38d467c5e533f3bc247b6ed245fb08412a479d7
SHA256ca5820bbbcbefd08f5ec820b833b23f7f97556a247da39510a70cbe7b809e3a9
SHA512aec2d63548176dc1a8ad3d2dfce0bc41973230c6898c55171dec7fc2919b84a8061d4308449c9551cc40ac7c08ad773fd6a7818bbd748ede9be64acc11dcfca5
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Filesize
1.1MB
MD53ee661f4a9794c72a91fa1f783f54969
SHA135780f52351da65b60cc63b302018950cbfe849f
SHA256ebcaf07121ce2483989e7a71d00b83c54b942f71e51271d5b28886ef03e45b51
SHA5120b53edac853f257b3c40b8b8014f0b0d53f546410d352965eace8eb251b2d75aa02e171586750a70dd97a4bc103b4b7707e90d5bd7a47c786858514f83281bde