Analysis
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max time kernel
150s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
21/02/2024, 07:40
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe
Resource
win7-20231215-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe
Resource
win10v2004-20231215-en
windows10-2004-x64
16 signatures
150 seconds
General
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Target
74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe
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Size
400KB
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MD5
0beff46df56a350e5e110da55db3a64c
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SHA1
05b3b3ce240c82e39095550c55a15bfa9a6541ba
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SHA256
74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2
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SHA512
150f1b8b4b243190570331bbb245535731a340cc6c76c978eedc751f6a5295e9864e67581c1b6743d1b5d1dd44efb259f3d5e8d295d82c3d9aad7ff407973c83
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SSDEEP
6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse
Score
8/10
Malware Config
Signatures
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Blocklisted process makes network request 10 IoCs
flow pid Process 3 2768 rundll32.exe 7 2768 rundll32.exe 8 2768 rundll32.exe 9 2768 rundll32.exe 10 2768 rundll32.exe 13 2768 rundll32.exe 14 2768 rundll32.exe 15 2768 rundll32.exe 17 2768 rundll32.exe 18 2768 rundll32.exe -
Deletes itself 1 IoCs
pid Process 2784 ysztc.exe -
Executes dropped EXE 1 IoCs
pid Process 2784 ysztc.exe -
Loads dropped DLL 6 IoCs
pid Process 1252 cmd.exe 1252 cmd.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\tyekfj\\hrjrd.dll\",Verify" rundll32.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\v: rundll32.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
description ioc Process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 2768 rundll32.exe -
Drops file in Program Files directory 2 IoCs
description ioc Process File opened for modification \??\c:\Program Files\tyekfj ysztc.exe File created \??\c:\Program Files\tyekfj\hrjrd.dll ysztc.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 2052 PING.EXE -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe 2768 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2768 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2100 74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe 2784 ysztc.exe -
Suspicious use of WriteProcessMemory 19 IoCs
description pid Process procid_target PID 2100 wrote to memory of 1252 2100 74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe 28 PID 2100 wrote to memory of 1252 2100 74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe 28 PID 2100 wrote to memory of 1252 2100 74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe 28 PID 2100 wrote to memory of 1252 2100 74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe 28 PID 1252 wrote to memory of 2052 1252 cmd.exe 30 PID 1252 wrote to memory of 2052 1252 cmd.exe 30 PID 1252 wrote to memory of 2052 1252 cmd.exe 30 PID 1252 wrote to memory of 2052 1252 cmd.exe 30 PID 1252 wrote to memory of 2784 1252 cmd.exe 31 PID 1252 wrote to memory of 2784 1252 cmd.exe 31 PID 1252 wrote to memory of 2784 1252 cmd.exe 31 PID 1252 wrote to memory of 2784 1252 cmd.exe 31 PID 2784 wrote to memory of 2768 2784 ysztc.exe 32 PID 2784 wrote to memory of 2768 2784 ysztc.exe 32 PID 2784 wrote to memory of 2768 2784 ysztc.exe 32 PID 2784 wrote to memory of 2768 2784 ysztc.exe 32 PID 2784 wrote to memory of 2768 2784 ysztc.exe 32 PID 2784 wrote to memory of 2768 2784 ysztc.exe 32 PID 2784 wrote to memory of 2768 2784 ysztc.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe"C:\Users\Admin\AppData\Local\Temp\74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2100 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ysztc.exe "C:\Users\Admin\AppData\Local\Temp\74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1252 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:2052
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C:\Users\Admin\AppData\Local\Temp\ysztc.exeC:\Users\Admin\AppData\Local\Temp\\ysztc.exe "C:\Users\Admin\AppData\Local\Temp\74dce8132d5318bc97bbb446dca875ad06b0571d198e97629412cbca52f382e2.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2784 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\tyekfj\hrjrd.dll",Verify C:\Users\Admin\AppData\Local\Temp\ysztc.exe4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2768
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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Filesize
228KB
MD589bdeb1aa0b052147956d3f9ff5c42b2
SHA114a208ad06c6e3db4d6252aa64e7c5ce94e48d0a
SHA2562ec9af838ed6e5f86b961163f1653a2a21a16e153e818f1ea281850a74020756
SHA5120c236e80c294b6008704b8a5acb1cb580045404d6ce0adddfe31e92c2d2ac7e736a6bc87b1a5837fa2e8f07bb0c081e940dafcdc391bbac6ec46b339875d20d5
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Filesize
400KB
MD59370a9b3b43b8a480b58a266f26d5e31
SHA15a3ef01d84b06cc794d7e6c34f83ba5d2b70ff1c
SHA256aa0f357aa15ecebb20f9162be648010b4d6d6eb67eff05dce7a4eb21fd4690f9
SHA5129ece1d93fab5206f8e61c79c84cedff8a33b1ff8622a0a8906ea0c49c0f86a8345fd741a1bdfcdbdeb05847bd1d78ccc02117990601e83c4834419a1c1412342