Analysis
-
max time kernel
126s -
max time network
156s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
31-05-2024 15:40
Behavioral task
behavioral1
Sample
nursultan nexgen fix.exe
Resource
win7-20240221-en
General
-
Target
nursultan nexgen fix.exe
-
Size
1.5MB
-
MD5
a3d07c747770c9a471a44446e46e33d5
-
SHA1
8340534fb1770bae9660287ddb0496e243efcfe4
-
SHA256
16015088c3352a8257f420555e7ce6245aa0e6682deeca79bf7e08c24e1ac3de
-
SHA512
307cbdddaa9f426f8ceec060c2c0b1ab5ed3573e327dbcfdda7b1dfd22cf17559f017d835d71bdd15397fa95b0c7dfbfb4cd6b51cd5b2adc1d1cddc8ffe27f99
-
SSDEEP
24576:U2G/nvxW3Ww0tpfnNGcvUCxt9groiK5Cg3ZRvm43TzvmF2cK07:UbA30pfnLRRgrheJROuTzvIR
Malware Config
Signatures
-
DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
-
Process spawned unexpected child process 27 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.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 2540 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2940 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2936 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 472 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2400 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1076 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 564 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1720 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1772 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2800 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2952 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2076 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2644 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1336 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2648 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2328 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1816 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1244 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2724 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2684 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2028 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1624 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1612 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1812 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2088 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2596 2416 schtasks.exe Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2032 2416 schtasks.exe -
Processes:
resource yara_rule \portagentbrowserweb\Containerruntime.exe dcrat behavioral1/memory/2768-13-0x0000000000940000-0x0000000000A72000-memory.dmp dcrat behavioral1/memory/1644-41-0x00000000012C0000-0x00000000013F2000-memory.dmp dcrat -
Disables Task Manager via registry modification
-
Executes dropped EXE 2 IoCs
Processes:
Containerruntime.exesmss.exepid process 2768 Containerruntime.exe 1644 smss.exe -
Loads dropped DLL 2 IoCs
Processes:
cmd.exepid process 2552 cmd.exe 2552 cmd.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Drops file in Program Files directory 4 IoCs
Processes:
Containerruntime.exedescription ioc process File created C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\it\dwm.exe Containerruntime.exe File created C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\it\6cb0b6c459d5d3 Containerruntime.exe File created C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\Idle.exe Containerruntime.exe File created C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\6ccacd8608530f Containerruntime.exe -
Drops file in Windows directory 2 IoCs
Processes:
Containerruntime.exedescription ioc process File created C:\Windows\ja-JP\winlogon.exe Containerruntime.exe File created C:\Windows\ja-JP\cc11b995f2a76d Containerruntime.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Creates scheduled task(s) 1 TTPs 27 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.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exepid process 2076 schtasks.exe 1612 schtasks.exe 2596 schtasks.exe 564 schtasks.exe 1720 schtasks.exe 1816 schtasks.exe 1244 schtasks.exe 2540 schtasks.exe 2400 schtasks.exe 2952 schtasks.exe 1336 schtasks.exe 2328 schtasks.exe 2032 schtasks.exe 1812 schtasks.exe 2940 schtasks.exe 2936 schtasks.exe 472 schtasks.exe 1772 schtasks.exe 2800 schtasks.exe 2648 schtasks.exe 2684 schtasks.exe 1076 schtasks.exe 2724 schtasks.exe 2028 schtasks.exe 1624 schtasks.exe 2088 schtasks.exe 2644 schtasks.exe -
Modifies registry key 1 TTPs 1 IoCs
-
Suspicious behavior: EnumeratesProcesses 22 IoCs
Processes:
Containerruntime.exesmss.exepid process 2768 Containerruntime.exe 2768 Containerruntime.exe 2768 Containerruntime.exe 2768 Containerruntime.exe 2768 Containerruntime.exe 2768 Containerruntime.exe 2768 Containerruntime.exe 2768 Containerruntime.exe 2768 Containerruntime.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe 1644 smss.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
smss.exepid process 1644 smss.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Containerruntime.exesmss.exedescription pid process Token: SeDebugPrivilege 2768 Containerruntime.exe Token: SeDebugPrivilege 1644 smss.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
nursultan nexgen fix.exeWScript.execmd.exeContainerruntime.exedescription pid process target process PID 1760 wrote to memory of 1296 1760 nursultan nexgen fix.exe WScript.exe PID 1760 wrote to memory of 1296 1760 nursultan nexgen fix.exe WScript.exe PID 1760 wrote to memory of 1296 1760 nursultan nexgen fix.exe WScript.exe PID 1760 wrote to memory of 1296 1760 nursultan nexgen fix.exe WScript.exe PID 1296 wrote to memory of 2552 1296 WScript.exe cmd.exe PID 1296 wrote to memory of 2552 1296 WScript.exe cmd.exe PID 1296 wrote to memory of 2552 1296 WScript.exe cmd.exe PID 1296 wrote to memory of 2552 1296 WScript.exe cmd.exe PID 2552 wrote to memory of 2768 2552 cmd.exe Containerruntime.exe PID 2552 wrote to memory of 2768 2552 cmd.exe Containerruntime.exe PID 2552 wrote to memory of 2768 2552 cmd.exe Containerruntime.exe PID 2552 wrote to memory of 2768 2552 cmd.exe Containerruntime.exe PID 2768 wrote to memory of 1644 2768 Containerruntime.exe smss.exe PID 2768 wrote to memory of 1644 2768 Containerruntime.exe smss.exe PID 2768 wrote to memory of 1644 2768 Containerruntime.exe smss.exe PID 2552 wrote to memory of 2144 2552 cmd.exe reg.exe PID 2552 wrote to memory of 2144 2552 cmd.exe reg.exe PID 2552 wrote to memory of 2144 2552 cmd.exe reg.exe PID 2552 wrote to memory of 2144 2552 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
-
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:1760 -
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe"2⤵
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Windows\SysWOW64\cmd.execmd /c ""C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat" "3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2552 -
C:\portagentbrowserweb\Containerruntime.exe"C:\portagentbrowserweb\Containerruntime.exe"4⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2768 -
C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\smss.exe"C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\smss.exe"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1644 -
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:2144
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\portagentbrowserweb\csrss.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2540
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\portagentbrowserweb\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2940
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\portagentbrowserweb\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2936
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 8 /tr "'C:\Windows\ja-JP\winlogon.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:472
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\ja-JP\winlogon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2400
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Windows\ja-JP\winlogon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1076
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\portagentbrowserweb\explorer.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:564
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\portagentbrowserweb\explorer.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1720
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\portagentbrowserweb\explorer.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1772
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwmd" /sc MINUTE /mo 7 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\it\dwm.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2800
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\it\dwm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2952
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwmd" /sc MINUTE /mo 6 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\it\dwm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2076
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\smss.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2644
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\smss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1336
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\smss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2648
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\Idle.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2328
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\Idle.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1816
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\Idle.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1244
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\services.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2724
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2684
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "servicess" /sc MINUTE /mo 9 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2028
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwmd" /sc MINUTE /mo 12 /tr "'C:\portagentbrowserweb\dwm.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1624
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\portagentbrowserweb\dwm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1612
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\portagentbrowserweb\dwm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1812
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.es\services.exe'" /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2088
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.es\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2596
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "servicess" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.es\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2032
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.batFilesize
157B
MD5c8f8a078dace2ff4cb106803c9199643
SHA1a5029ff4c4f0f24b0fbe2951c9a8002501ebd3b5
SHA2561b99d39fa273f33b072c67e0df7d33b1699fa17b7c7139467a658302a5ed0e0d
SHA512efaea3b4653768bbd135a0ec55319df2464f1d440ad982f31a5eff05c5ba5032f4718683ff6419c668bf1f34a117b5a101f56d1efc1d74ad93e692c52686f999
-
C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbeFilesize
220B
MD561a07f2f9e8e9b1f5175b2d60c3e3f18
SHA1e695b0c2b43c786453bf3f6ae504f0626951d281
SHA2565c75708ec9e4fe419a2fd1067bd5793bacb28140177cc6b36300fbf28e7c23d1
SHA5128ef3529f6bf504224e7803019f1e162aead7961bc1a5115f50fb5f580570e8b04707da21a7aab4eb7f1554a3b5333597fb3335e5f6a74dabfdb0583eecb35b5d
-
\portagentbrowserweb\Containerruntime.exeFilesize
1.2MB
MD55887a563351ca99247b7e2c448bd9f2e
SHA1b24695e88143863297535989900bb7521ea86d67
SHA256e74cbd74c838db604926e27322342c02f803b95f98680d4089b5c01ed93fb390
SHA512b7d82bd09ba64891b75bbb9356de74a1ed0835709a391698c1301825777418f57e4f2ae3c260d3f7b6ada05d0e7ddeb4a6b75901fdf53bdd82ffa2febb685107
-
memory/1644-41-0x00000000012C0000-0x00000000013F2000-memory.dmpFilesize
1.2MB
-
memory/2768-13-0x0000000000940000-0x0000000000A72000-memory.dmpFilesize
1.2MB
-
memory/2768-14-0x00000000002D0000-0x00000000002EC000-memory.dmpFilesize
112KB
-
memory/2768-15-0x00000000002F0000-0x0000000000306000-memory.dmpFilesize
88KB
-
memory/2768-16-0x0000000000310000-0x000000000031C000-memory.dmpFilesize
48KB