Analysis
- max time kernel
149s - max time network
136s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system - submitted
03/06/2024, 15:44
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe
Resource
win7-20240220-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe
Resource
win10v2004-20240508-en
windows10-2004-x64
16 signatures
150 seconds
General
- Target c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe
- Size 406KB
- Sample240603-s6y8dsce35
- SHA256 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11
- MD5 5b1735311f4d2171c2967dce3b717821
- SHA1 57bf4aa635f639212ba21893de64596cdf76958a
- SHA512 127d0d3dd07be624d82b56f7c445e084d09b9703209a78e4fbb6ae6a6144d836fdd2ead19f7556277d9ce7212745ea37d97b1b5321a5a99c90f623baad74b20b
- SSDEEP 6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH47:gtRfJcNYFNm8UhlZGse7
- MD5 SHA1 SHA512 SSDEEP
Score
8/10
Malware Config
Signatures
- Blocklisted process makes network request 8 IoCs
flow pid Process 21 2124 rundll32.exe 28 2124 rundll32.exe 29 2124 rundll32.exe 30 2124 rundll32.exe 43 2124 rundll32.exe 44 2124 rundll32.exe 52 2124 rundll32.exe 64 2124 rundll32.exe - Deletes itself 1 IoCs
pid Process 4208 lmuli.exe - Executes dropped EXE 1 IoCs
pid Process 4208 lmuli.exe - Loads dropped DLL 1 IoCs
pid Process 2124 rundll32.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\iuvsw\\gmtbbqyp.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) \??\n: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\b: 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) \??\v: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\a: 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 2124 rundll32.exe - Drops file in Program Files directory 2 IoCs
description ioc Process File opened for modification \??\c:\Program Files\iuvsw lmuli.exe File created \??\c:\Program Files\iuvsw\gmtbbqyp.dll lmuli.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 3484 PING.EXE - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe 2124 rundll32.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2124 rundll32.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2944 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 4208 lmuli.exe - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 2944 wrote to memory of 3632 2944 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 84 PID 2944 wrote to memory of 3632 2944 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 84 PID 2944 wrote to memory of 3632 2944 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 84 PID 3632 wrote to memory of 3484 3632 cmd.exe 86 PID 3632 wrote to memory of 3484 3632 cmd.exe 86 PID 3632 wrote to memory of 3484 3632 cmd.exe 86 PID 3632 wrote to memory of 4208 3632 cmd.exe 89 PID 3632 wrote to memory of 4208 3632 cmd.exe 89 PID 3632 wrote to memory of 4208 3632 cmd.exe 89 PID 4208 wrote to memory of 2124 4208 lmuli.exe 90 PID 4208 wrote to memory of 2124 4208 lmuli.exe 90 PID 4208 wrote to memory of 2124 4208 lmuli.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe"C:\Users\Admin\AppData\Local\Temp\c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2944 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\lmuli.exe "C:\Users\Admin\AppData\Local\Temp\c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:3632 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:3484
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C:\Users\Admin\AppData\Local\Temp\lmuli.exeC:\Users\Admin\AppData\Local\Temp\\lmuli.exe "C:\Users\Admin\AppData\Local\Temp\c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4208 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\iuvsw\gmtbbqyp.dll",Verify C:\Users\Admin\AppData\Local\Temp\lmuli.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:2124
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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
- Path C:\Users\Admin\AppData\Local\Temp\lmuli.exe
- Size 406KB
- SHA256 80a67ec07b203352b6fa7293af6f2276a70d877307fe8d228a17eecbf3e341bd
- MD5 57200b504ccbdca349551b47c2d32268
- SHA1 dade1ba84e890786c535a73e1aef54f9e890bf5d
- SHA512 4e2b6acb54050ac63692359ea2ca05412e6c2cda4c4784fffff6e8ba96f84dc90f46e85bd09692a8cd61ca7dbe582f13c0dd37a2994389954dbceda130907f75
- SSDEEP 6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4S:gtRfJcNYFNm8UhlZGseS
- MD5 SHA1 SHA512 SSDEEP
- Path \??\c:\Program Files\iuvsw\gmtbbqyp.dll
- Size 228KB
- SHA256 3e5e7113bcc1fc2136d646dd460cd1423a4d0b99c7d101b9f671d7b8a2ee58d8
- MD5 fbc9084549fb26cc269956b6a52a3bd6
- SHA1 abe5ed2cdba4210fb97ec49b1e4f0f853befc94b
- SHA512 71da3d4767025a325332a288da3f8a7015dee59f97025ba639bd521a898dba7387684a9c5ee6ad9aca8bdbb3eb65eadcdb8a05740c652df78c42a880d3b8d62e
- SSDEEP 6144:U1oEITTl5VCuHFrEy0wEOR7ndfAnVxERZ4CR3XaNW:5vVrHFrL05gdonVANp1
- MD5 SHA1 SHA512 SSDEEP