Analysis
- max time kernel
149s - max time network
149s - platform
windows7_x64 - resource
win7-20240220-en - resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-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 10 IoCs
flow pid Process 3 2656 rundll32.exe 7 2656 rundll32.exe 8 2656 rundll32.exe 9 2656 rundll32.exe 10 2656 rundll32.exe 13 2656 rundll32.exe 14 2656 rundll32.exe 15 2656 rundll32.exe 17 2656 rundll32.exe 18 2656 rundll32.exe - Deletes itself 1 IoCs
pid Process 2560 ymzrxjbi.exe - Executes dropped EXE 1 IoCs
pid Process 2560 ymzrxjbi.exe - Loads dropped DLL 6 IoCs
pid Process 2972 cmd.exe 2972 cmd.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 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-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\jauriwcd\\qknah.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) \??\r: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\x: 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 2656 rundll32.exe - Drops file in Program Files directory 2 IoCs
description ioc Process File opened for modification \??\c:\Program Files\jauriwcd ymzrxjbi.exe File created \??\c:\Program Files\jauriwcd\qknah.dll ymzrxjbi.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 2916 PING.EXE - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe 2656 rundll32.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2656 rundll32.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2040 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 2560 ymzrxjbi.exe - Suspicious use of WriteProcessMemory 19 IoCs
description pid Process procid_target PID 2040 wrote to memory of 2972 2040 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 28 PID 2040 wrote to memory of 2972 2040 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 28 PID 2040 wrote to memory of 2972 2040 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 28 PID 2040 wrote to memory of 2972 2040 c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe 28 PID 2972 wrote to memory of 2916 2972 cmd.exe 30 PID 2972 wrote to memory of 2916 2972 cmd.exe 30 PID 2972 wrote to memory of 2916 2972 cmd.exe 30 PID 2972 wrote to memory of 2916 2972 cmd.exe 30 PID 2972 wrote to memory of 2560 2972 cmd.exe 31 PID 2972 wrote to memory of 2560 2972 cmd.exe 31 PID 2972 wrote to memory of 2560 2972 cmd.exe 31 PID 2972 wrote to memory of 2560 2972 cmd.exe 31 PID 2560 wrote to memory of 2656 2560 ymzrxjbi.exe 32 PID 2560 wrote to memory of 2656 2560 ymzrxjbi.exe 32 PID 2560 wrote to memory of 2656 2560 ymzrxjbi.exe 32 PID 2560 wrote to memory of 2656 2560 ymzrxjbi.exe 32 PID 2560 wrote to memory of 2656 2560 ymzrxjbi.exe 32 PID 2560 wrote to memory of 2656 2560 ymzrxjbi.exe 32 PID 2560 wrote to memory of 2656 2560 ymzrxjbi.exe 32
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:2040 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ymzrxjbi.exe "C:\Users\Admin\AppData\Local\Temp\c7ee41bcd8412b03fa2f7411f7a548243a55f68121faf1f7155dfde6d2f05c11.exe"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2972 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:2916
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C:\Users\Admin\AppData\Local\Temp\ymzrxjbi.exeC:\Users\Admin\AppData\Local\Temp\\ymzrxjbi.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:2560 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\jauriwcd\qknah.dll",Verify C:\Users\Admin\AppData\Local\Temp\ymzrxjbi.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:2656
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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:\Program Files\jauriwcd\qknah.dll
- Size 228KB
- SHA256 129ee73ac44380983e78acf23602aa84022ddfa43393929b8e17496145596677
- MD5 882aeefd5c8bb7a3cc13726fd85fa12b
- SHA1 caebe8e8a87dee59ec16d9471f37f9810b11807e
- SHA512 fe139c94d9939343c9d45abf05509e27f5d170e512fc449baea45783df1a4b928621dc1ce0663b210e3144a9fc2e15183cceb567422e909989c8daa9c1dce5e6
- SSDEEP 6144:U1oEITTl5VCuHFrEy0wEOR7ndfAnVxERZ4CR3XaNx:5vVrHFrL05gdonVANpg
- MD5 SHA1 SHA512 SSDEEP
- Path \Users\Admin\AppData\Local\Temp\ymzrxjbi.exe
- Size 406KB
- SHA256 f3e4fd11f133df4dbdb3a12c769f122577a866c0708834125c75892ad5d168e9
- MD5 10cbed1d9ba2cdd69d7f2376d4e3a92d
- SHA1 143dbcda90455adf20082456575ac693e94e4d6e
- SHA512 0aab8d1a0ca10d0667ea04cd5ade5417ff498705722fb485bbf46b6f42ca4d2e8642215d6a455e0de3688714911a9f6950fd45a2d8c9fc309199f0b5a9cb84de
- SSDEEP 6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse
- MD5 SHA1 SHA512 SSDEEP