Analysis
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max time kernel
133s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
07/05/2024, 06:37
Behavioral task
behavioral1
Sample
840f3a90967edae5af243a9786d52ea0_NEAS.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
840f3a90967edae5af243a9786d52ea0_NEAS.exe
Resource
win10v2004-20240419-en
General
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Target
840f3a90967edae5af243a9786d52ea0_NEAS.exe
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Size
196KB
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MD5
840f3a90967edae5af243a9786d52ea0
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SHA1
23a1d1fb708b63d8576fbe45c3f9900b56f47125
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SHA256
d4fb2e5b7f988b7db1d86bad83da846ebce7e923d94a30cb8e6649ce9e4cd5e2
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SHA512
a152f44555aeb8d1be11d244ae21938443d6750725d13f5d9e4f364de7a1a1246f73804d5270abcb81ad5b3fb8033a546df036fcd2f52051ca07f94d28b8bded
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SSDEEP
3072:a74MyJjjlLzVjN50BdQqlYgp72xzbuawaGO0OJw8KWs6IgVLE7QkfIA:awj30dlZ+GVaRVLE7QkfI
Malware Config
Signatures
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Blocklisted process makes network request 7 IoCs
flow pid Process 18 2296 rundll32.exe 25 2296 rundll32.exe 27 2296 rundll32.exe 28 2296 rundll32.exe 46 2296 rundll32.exe 72 2296 rundll32.exe 73 2296 rundll32.exe -
Deletes itself 1 IoCs
pid Process 4468 vbpkk.exe -
Executes dropped EXE 1 IoCs
pid Process 4468 vbpkk.exe -
Loads dropped DLL 1 IoCs
pid Process 2296 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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resource yara_rule behavioral2/memory/1424-0-0x0000000000400000-0x000000000044A000-memory.dmp upx behavioral2/memory/1424-2-0x0000000000400000-0x000000000044A000-memory.dmp upx behavioral2/files/0x000c000000023b42-4.dat upx behavioral2/memory/4468-6-0x0000000000400000-0x000000000044A000-memory.dmp upx behavioral2/memory/4468-9-0x0000000000400000-0x000000000044A000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Micro = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\mkfmp\\lzast.dll\",method" 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) \??\p: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\o: 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 -
Drops file in Program Files directory 2 IoCs
description ioc Process File opened for modification \??\c:\Program Files\mkfmp vbpkk.exe File created \??\c:\Program Files\mkfmp\lzast.dll vbpkk.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 4480 PING.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 2296 rundll32.exe 2296 rundll32.exe 2296 rundll32.exe 2296 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2296 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1424 840f3a90967edae5af243a9786d52ea0_NEAS.exe 4468 vbpkk.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 1424 wrote to memory of 3772 1424 840f3a90967edae5af243a9786d52ea0_NEAS.exe 85 PID 1424 wrote to memory of 3772 1424 840f3a90967edae5af243a9786d52ea0_NEAS.exe 85 PID 1424 wrote to memory of 3772 1424 840f3a90967edae5af243a9786d52ea0_NEAS.exe 85 PID 3772 wrote to memory of 4480 3772 cmd.exe 88 PID 3772 wrote to memory of 4480 3772 cmd.exe 88 PID 3772 wrote to memory of 4480 3772 cmd.exe 88 PID 3772 wrote to memory of 4468 3772 cmd.exe 91 PID 3772 wrote to memory of 4468 3772 cmd.exe 91 PID 3772 wrote to memory of 4468 3772 cmd.exe 91 PID 4468 wrote to memory of 2296 4468 vbpkk.exe 92 PID 4468 wrote to memory of 2296 4468 vbpkk.exe 92 PID 4468 wrote to memory of 2296 4468 vbpkk.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe"C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1424 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vbpkk.exe "C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:3772 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:4480
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C:\Users\Admin\AppData\Local\Temp\vbpkk.exeC:\Users\Admin\AppData\Local\Temp\\vbpkk.exe "C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4468 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\mkfmp\lzast.dll",method C:\Users\Admin\AppData\Local\Temp\vbpkk.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)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2296
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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
196KB
MD59874475a6f116ddd2d2e1143f65070e3
SHA17a34d2ebe72c79a43c26e2a5f1ce3c7d96f28e3e
SHA256cbc79febb583c5f7684e902cbde5587a4517c3adf37a6ca2c9d12b41cc31b9be
SHA512b8a38c93b6634eca32cefe4c5f039bfca3123a08480ca9adad913dcbe64c0ff054e45f6eb87132d220aa2bae8de35ecc56d385d379a8deefeb98934718c27813
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Filesize
148KB
MD53ea3dc7955100908e1423bbeb89b761b
SHA1400896ff76285ec7e0586aa07f534d8d08366177
SHA2561e81ecb7d2132a7785e076a0d55509c6ea5ac229c1cc8f8c137d997eeff15b16
SHA51275677aedf283e1f9dd7850ea28aeb45634977b6c4dad59fe263ff2fea8efe6694bfdde60f98803af4ab48203691812f4710f114f65b8ae4fb9c73ca1373dc483