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 12:55
Behavioral task
behavioral1
Sample
Nursultan.exe
Resource
win7-20240508-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 4340 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3868 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 228 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3020 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4196 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1644 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2820 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3408 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2492 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1380 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1716 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4528 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 5004 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1312 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3596 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3976 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4944 5116 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4416 5116 schtasks.exe -
Processes:
resource yara_rule behavioral2/memory/4128-1-0x0000000000680000-0x00000000007EC000-memory.dmp dcrat C:\Users\Admin\AppData\Local\Temp\svchost.exe dcrat C:\Hypercommon\ServercrtDll.exe dcrat behavioral2/memory/3488-39-0x0000000000240000-0x0000000000316000-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.exelsass.exepid process 3728 svchost.exe 2792 explorer.exe 3488 ServercrtDll.exe 456 lsass.exe -
Drops file in Program Files directory 4 IoCs
Processes:
ServercrtDll.exedescription ioc process File created C:\Program Files\Windows NT\TableTextService\en-US\dllhost.exe ServercrtDll.exe File created C:\Program Files\Windows NT\TableTextService\en-US\5940a34987c991 ServercrtDll.exe File created C:\Program Files (x86)\Windows NT\Accessories\en-US\lsass.exe ServercrtDll.exe File created C:\Program Files (x86)\Windows NT\Accessories\en-US\6203df4a6bafc7 ServercrtDll.exe -
Drops file in Windows directory 7 IoCs
Processes:
ServercrtDll.exedescription ioc process File created C:\Windows\it-IT\lsass.exe ServercrtDll.exe File created C:\Windows\it-IT\6203df4a6bafc7 ServercrtDll.exe File created C:\Windows\Resources\lsass.exe ServercrtDll.exe File created C:\Windows\Resources\6203df4a6bafc7 ServercrtDll.exe File created C:\Windows\Help\OEM\ContentStore\fontdrvhost.exe ServercrtDll.exe File opened for modification C:\Windows\Help\OEM\ContentStore\fontdrvhost.exe ServercrtDll.exe File created C:\Windows\Help\OEM\ContentStore\5b884080fd4f94 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 4196 schtasks.exe 3976 schtasks.exe 4340 schtasks.exe 2492 schtasks.exe 1716 schtasks.exe 4528 schtasks.exe 3596 schtasks.exe 4944 schtasks.exe 228 schtasks.exe 1644 schtasks.exe 2820 schtasks.exe 3408 schtasks.exe 5004 schtasks.exe 3868 schtasks.exe 3020 schtasks.exe 1380 schtasks.exe 1312 schtasks.exe 4416 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 14 IoCs
Processes:
explorer.exeServercrtDll.exelsass.exepid process 2792 explorer.exe 2792 explorer.exe 3488 ServercrtDll.exe 3488 ServercrtDll.exe 3488 ServercrtDll.exe 456 lsass.exe 456 lsass.exe 456 lsass.exe 456 lsass.exe 456 lsass.exe 456 lsass.exe 456 lsass.exe 456 lsass.exe 456 lsass.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
lsass.exepid process 456 lsass.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
explorer.exeServercrtDll.exelsass.exedescription pid process Token: SeDebugPrivilege 2792 explorer.exe Token: SeDebugPrivilege 3488 ServercrtDll.exe Token: SeDebugPrivilege 456 lsass.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
Nursultan.exesvchost.exeWScript.execmd.exeServercrtDll.execmd.exedescription pid process target process PID 4128 wrote to memory of 3728 4128 Nursultan.exe svchost.exe PID 4128 wrote to memory of 3728 4128 Nursultan.exe svchost.exe PID 4128 wrote to memory of 3728 4128 Nursultan.exe svchost.exe PID 4128 wrote to memory of 2792 4128 Nursultan.exe explorer.exe PID 4128 wrote to memory of 2792 4128 Nursultan.exe explorer.exe PID 3728 wrote to memory of 5044 3728 svchost.exe WScript.exe PID 3728 wrote to memory of 5044 3728 svchost.exe WScript.exe PID 3728 wrote to memory of 5044 3728 svchost.exe WScript.exe PID 5044 wrote to memory of 1140 5044 WScript.exe cmd.exe PID 5044 wrote to memory of 1140 5044 WScript.exe cmd.exe PID 5044 wrote to memory of 1140 5044 WScript.exe cmd.exe PID 1140 wrote to memory of 3488 1140 cmd.exe ServercrtDll.exe PID 1140 wrote to memory of 3488 1140 cmd.exe ServercrtDll.exe PID 3488 wrote to memory of 3740 3488 ServercrtDll.exe cmd.exe PID 3488 wrote to memory of 3740 3488 ServercrtDll.exe cmd.exe PID 3740 wrote to memory of 4652 3740 cmd.exe w32tm.exe PID 3740 wrote to memory of 4652 3740 cmd.exe w32tm.exe PID 3740 wrote to memory of 456 3740 cmd.exe lsass.exe PID 3740 wrote to memory of 456 3740 cmd.exe lsass.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:4128 -
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:3728 -
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe"3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5044 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Hypercommon\Udwe1ynNPaETo.bat" "4⤵
- Suspicious use of WriteProcessMemory
PID:1140 -
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:3488 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\nV5sdPy2d4.bat"6⤵
- Suspicious use of WriteProcessMemory
PID:3740 -
C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:27⤵PID:4652
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C:\Program Files (x86)\Windows NT\Accessories\en-US\lsass.exe"C:\Program Files (x86)\Windows NT\Accessories\en-US\lsass.exe"7⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:456
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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:2792
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Windows\Help\OEM\ContentStore\fontdrvhost.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4340
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\Help\OEM\ContentStore\fontdrvhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3868
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 9 /tr "'C:\Windows\Help\OEM\ContentStore\fontdrvhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:228
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Windows\it-IT\lsass.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3020
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\it-IT\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4196
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\Windows\it-IT\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1644
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Program Files\Windows NT\TableTextService\en-US\dllhost.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2820
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Windows NT\TableTextService\en-US\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3408
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows NT\TableTextService\en-US\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2492
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\WmiPrvSE.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1380
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Users\Default User\WmiPrvSE.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1716
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\WmiPrvSE.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4528
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Windows\Resources\lsass.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5004
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\Resources\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1312
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Windows\Resources\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3596
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\lsass.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3976
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4416
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4944
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
303KB
MD57d9282b8529bbb4ac06a3994fbcd0622
SHA1d38d467c5e533f3bc247b6ed245fb08412a479d7
SHA256ca5820bbbcbefd08f5ec820b833b23f7f97556a247da39510a70cbe7b809e3a9
SHA512aec2d63548176dc1a8ad3d2dfce0bc41973230c6898c55171dec7fc2919b84a8061d4308449c9551cc40ac7c08ad773fd6a7818bbd748ede9be64acc11dcfca5
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Filesize
226B
MD546957883fff899a49bce59c7c7822fdd
SHA1f3b2ac4a3f3c2d122ac6218309ac05bb8487d9dd
SHA2566733a59af55f6a2d76791d18f9ae002f8b6a29f225b70fd184a39efa7fbf263f
SHA51295b15c7b7dc408c30452b4547708c3e9535627a362fe758d76e6e0c89640dee54a8e280bf0f7edacf8ccb406c72a99f3af97f4d60eb772a75fbcd4e7f788396a
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Filesize
1.1MB
MD53ee661f4a9794c72a91fa1f783f54969
SHA135780f52351da65b60cc63b302018950cbfe849f
SHA256ebcaf07121ce2483989e7a71d00b83c54b942f71e51271d5b28886ef03e45b51
SHA5120b53edac853f257b3c40b8b8014f0b0d53f546410d352965eace8eb251b2d75aa02e171586750a70dd97a4bc103b4b7707e90d5bd7a47c786858514f83281bde