Analysis
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max time kernel
144s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
31-05-2024 15:45
Behavioral task
behavioral1
Sample
nursultan nexgen fix.exe
Resource
win7-20240508-en
General
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Target
nursultan nexgen fix.exe
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Size
1.5MB
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MD5
a3d07c747770c9a471a44446e46e33d5
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SHA1
8340534fb1770bae9660287ddb0496e243efcfe4
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SHA256
16015088c3352a8257f420555e7ce6245aa0e6682deeca79bf7e08c24e1ac3de
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SHA512
307cbdddaa9f426f8ceec060c2c0b1ab5ed3573e327dbcfdda7b1dfd22cf17559f017d835d71bdd15397fa95b0c7dfbfb4cd6b51cd5b2adc1d1cddc8ffe27f99
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SSDEEP
24576:U2G/nvxW3Ww0tpfnNGcvUCxt9groiK5Cg3ZRvm43TzvmF2cK07:UbA30pfnLRRgrheJROuTzvIR
Malware Config
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 21 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.exeschtasks.exeschtasks.exeschtasks.exedescription pid pid_target process target process Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2460 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2480 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2380 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3020 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2476 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1928 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2744 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2752 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2784 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1828 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1916 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1216 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1832 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1652 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2160 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 752 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 808 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2116 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1560 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1508 2596 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1540 2596 schtasks.exe -
Processes:
resource yara_rule \portagentbrowserweb\Containerruntime.exe dcrat behavioral1/memory/2712-13-0x0000000000840000-0x0000000000972000-memory.dmp dcrat behavioral1/memory/2312-37-0x0000000000260000-0x0000000000392000-memory.dmp dcrat -
Disables Task Manager via registry modification
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Executes dropped EXE 2 IoCs
Processes:
Containerruntime.exelsm.exepid process 2712 Containerruntime.exe 2312 lsm.exe -
Loads dropped DLL 2 IoCs
Processes:
cmd.exepid process 2704 cmd.exe 2704 cmd.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops file in Program Files directory 6 IoCs
Processes:
Containerruntime.exedescription ioc process File created C:\Program Files (x86)\Windows Defender\lsm.exe Containerruntime.exe File created C:\Program Files (x86)\Windows Defender\101b941d020240 Containerruntime.exe File created C:\Program Files\7-Zip\Lang\csrss.exe Containerruntime.exe File created C:\Program Files\7-Zip\Lang\886983d96e3d3e Containerruntime.exe File created C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\System.exe Containerruntime.exe File created C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\27d1bcfc3c54e0 Containerruntime.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 21 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.exeschtasks.exeschtasks.exeschtasks.exepid process 2380 schtasks.exe 2744 schtasks.exe 2752 schtasks.exe 1916 schtasks.exe 752 schtasks.exe 808 schtasks.exe 2460 schtasks.exe 3020 schtasks.exe 1828 schtasks.exe 2116 schtasks.exe 2476 schtasks.exe 1928 schtasks.exe 2784 schtasks.exe 1652 schtasks.exe 2160 schtasks.exe 1560 schtasks.exe 2480 schtasks.exe 1216 schtasks.exe 1832 schtasks.exe 1508 schtasks.exe 1540 schtasks.exe -
Modifies registry key 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 14 IoCs
Processes:
Containerruntime.exelsm.exepid process 2712 Containerruntime.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe 2312 lsm.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
lsm.exepid process 2312 lsm.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Containerruntime.exelsm.exedescription pid process Token: SeDebugPrivilege 2712 Containerruntime.exe Token: SeDebugPrivilege 2312 lsm.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
nursultan nexgen fix.exeWScript.execmd.exeContainerruntime.exedescription pid process target process PID 2128 wrote to memory of 2288 2128 nursultan nexgen fix.exe WScript.exe PID 2128 wrote to memory of 2288 2128 nursultan nexgen fix.exe WScript.exe PID 2128 wrote to memory of 2288 2128 nursultan nexgen fix.exe WScript.exe PID 2128 wrote to memory of 2288 2128 nursultan nexgen fix.exe WScript.exe PID 2288 wrote to memory of 2704 2288 WScript.exe cmd.exe PID 2288 wrote to memory of 2704 2288 WScript.exe cmd.exe PID 2288 wrote to memory of 2704 2288 WScript.exe cmd.exe PID 2288 wrote to memory of 2704 2288 WScript.exe cmd.exe PID 2704 wrote to memory of 2712 2704 cmd.exe Containerruntime.exe PID 2704 wrote to memory of 2712 2704 cmd.exe Containerruntime.exe PID 2704 wrote to memory of 2712 2704 cmd.exe Containerruntime.exe PID 2704 wrote to memory of 2712 2704 cmd.exe Containerruntime.exe PID 2712 wrote to memory of 2312 2712 Containerruntime.exe lsm.exe PID 2712 wrote to memory of 2312 2712 Containerruntime.exe lsm.exe PID 2712 wrote to memory of 2312 2712 Containerruntime.exe lsm.exe PID 2704 wrote to memory of 1716 2704 cmd.exe reg.exe PID 2704 wrote to memory of 1716 2704 cmd.exe reg.exe PID 2704 wrote to memory of 1716 2704 cmd.exe reg.exe PID 2704 wrote to memory of 1716 2704 cmd.exe reg.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 nexgen fix.exe"C:\Users\Admin\AppData\Local\Temp\nursultan nexgen fix.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:2128 -
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe"2⤵
- Suspicious use of WriteProcessMemory
PID:2288 -
C:\Windows\SysWOW64\cmd.execmd /c ""C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat" "3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2704 -
C:\portagentbrowserweb\Containerruntime.exe"C:\portagentbrowserweb\Containerruntime.exe"4⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2712 -
C:\Program Files (x86)\Windows Defender\lsm.exe"C:\Program Files (x86)\Windows Defender\lsm.exe"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:2312 -
C:\Windows\SysWOW64\reg.exereg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f4⤵
- Modifies registry key
PID:1716
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\portagentbrowserweb\services.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2460
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\portagentbrowserweb\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2480
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\portagentbrowserweb\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2380
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Links\wininit.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3020
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\Default\Links\wininit.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2476
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Links\wininit.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1928
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\System.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2744
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\System.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2752
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\System.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2784
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsml" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Defender\lsm.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1828
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\lsm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1916
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Defender\lsm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1216
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Program Files\7-Zip\Lang\csrss.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1832
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\7-Zip\Lang\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1652
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files\7-Zip\Lang\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2160
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Recovery\8f60a382-0d98-11ef-817d-5aba25856535\Idle.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:752
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\8f60a382-0d98-11ef-817d-5aba25856535\Idle.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:808
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "IdleI" /sc MINUTE /mo 9 /tr "'C:\Recovery\8f60a382-0d98-11ef-817d-5aba25856535\Idle.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2116
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "conhostc" /sc MINUTE /mo 14 /tr "'C:\portagentbrowserweb\conhost.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1560
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\portagentbrowserweb\conhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1508
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "conhostc" /sc MINUTE /mo 12 /tr "'C:\portagentbrowserweb\conhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1540
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.batFilesize
157B
MD5c8f8a078dace2ff4cb106803c9199643
SHA1a5029ff4c4f0f24b0fbe2951c9a8002501ebd3b5
SHA2561b99d39fa273f33b072c67e0df7d33b1699fa17b7c7139467a658302a5ed0e0d
SHA512efaea3b4653768bbd135a0ec55319df2464f1d440ad982f31a5eff05c5ba5032f4718683ff6419c668bf1f34a117b5a101f56d1efc1d74ad93e692c52686f999
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C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbeFilesize
220B
MD561a07f2f9e8e9b1f5175b2d60c3e3f18
SHA1e695b0c2b43c786453bf3f6ae504f0626951d281
SHA2565c75708ec9e4fe419a2fd1067bd5793bacb28140177cc6b36300fbf28e7c23d1
SHA5128ef3529f6bf504224e7803019f1e162aead7961bc1a5115f50fb5f580570e8b04707da21a7aab4eb7f1554a3b5333597fb3335e5f6a74dabfdb0583eecb35b5d
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\portagentbrowserweb\Containerruntime.exeFilesize
1.2MB
MD55887a563351ca99247b7e2c448bd9f2e
SHA1b24695e88143863297535989900bb7521ea86d67
SHA256e74cbd74c838db604926e27322342c02f803b95f98680d4089b5c01ed93fb390
SHA512b7d82bd09ba64891b75bbb9356de74a1ed0835709a391698c1301825777418f57e4f2ae3c260d3f7b6ada05d0e7ddeb4a6b75901fdf53bdd82ffa2febb685107
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memory/2312-37-0x0000000000260000-0x0000000000392000-memory.dmpFilesize
1.2MB
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memory/2712-13-0x0000000000840000-0x0000000000972000-memory.dmpFilesize
1.2MB
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memory/2712-14-0x0000000000440000-0x000000000045C000-memory.dmpFilesize
112KB
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memory/2712-15-0x0000000000460000-0x0000000000476000-memory.dmpFilesize
88KB
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memory/2712-16-0x00000000003B0000-0x00000000003BC000-memory.dmpFilesize
48KB