Analysis
-
max time kernel
152s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
19-04-2024 07:14
Static task
static1
Behavioral task
behavioral1
Sample
ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe
Resource
win10v2004-20240412-en
General
-
Target
ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe
-
Size
404KB
-
MD5
a6cc48bfd7a2081f1a38174c1884acf3
-
SHA1
daac0b9579a20f54925a793171d76d44007899a9
-
SHA256
ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826
-
SHA512
c05c9a184e6bed1256d3508531f58e41a9ab299dbf15373c990b24de97ec020a835389c5face92c4a3b0be0f535d9f5c342560a0975abbcdd708ee0e760ef6eb
-
SSDEEP
6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4X:gtRfJcNYFNm8UhlZGseX
Malware Config
Signatures
-
Blocklisted process makes network request 7 IoCs
Processes:
rundll32.exeflow pid process 28 3364 rundll32.exe 41 3364 rundll32.exe 42 3364 rundll32.exe 43 3364 rundll32.exe 45 3364 rundll32.exe 54 3364 rundll32.exe 55 3364 rundll32.exe -
Deletes itself 1 IoCs
Processes:
rehiob.exepid process 3596 rehiob.exe -
Executes dropped EXE 1 IoCs
Processes:
rehiob.exepid process 3596 rehiob.exe -
Loads dropped DLL 1 IoCs
Processes:
rundll32.exepid process 3364 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
Processes:
rundll32.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-776854024-226333264-2052258302-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\bxles\\jgeot.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.
Processes:
rundll32.exedescription ioc process File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\u: 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.
Processes:
rundll32.exedescription ioc process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
rundll32.exepid process 3364 rundll32.exe -
Drops file in Program Files directory 2 IoCs
Processes:
rehiob.exedescription ioc process File opened for modification \??\c:\Program Files\bxles rehiob.exe File created \??\c:\Program Files\bxles\jgeot.dll rehiob.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
rundll32.exedescription 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
-
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
rundll32.exepid process 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe 3364 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 3364 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exerehiob.exepid process 2900 ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe 3596 rehiob.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.execmd.exerehiob.exedescription pid process target process PID 2900 wrote to memory of 2076 2900 ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe cmd.exe PID 2900 wrote to memory of 2076 2900 ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe cmd.exe PID 2900 wrote to memory of 2076 2900 ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe cmd.exe PID 2076 wrote to memory of 2004 2076 cmd.exe PING.EXE PID 2076 wrote to memory of 2004 2076 cmd.exe PING.EXE PID 2076 wrote to memory of 2004 2076 cmd.exe PING.EXE PID 2076 wrote to memory of 3596 2076 cmd.exe rehiob.exe PID 2076 wrote to memory of 3596 2076 cmd.exe rehiob.exe PID 2076 wrote to memory of 3596 2076 cmd.exe rehiob.exe PID 3596 wrote to memory of 3364 3596 rehiob.exe rundll32.exe PID 3596 wrote to memory of 3364 3596 rehiob.exe rundll32.exe PID 3596 wrote to memory of 3364 3596 rehiob.exe rundll32.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe"C:\Users\Admin\AppData\Local\Temp\ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rehiob.exe "C:\Users\Admin\AppData\Local\Temp\ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe"2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
-
C:\Users\Admin\AppData\Local\Temp\rehiob.exeC:\Users\Admin\AppData\Local\Temp\\rehiob.exe "C:\Users\Admin\AppData\Local\Temp\ea5ad100a0892bab587bcc05ffd17c9d9ab0f79084c01d99119fd9bc1f326826.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\bxles\jgeot.dll",Verify C:\Users\Admin\AppData\Local\Temp\rehiob.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
Network
MITRE ATT&CK Matrix ATT&CK v13
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
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\rehiob.exeFilesize
404KB
MD5a3f15a70baecef054b463f12e56c55bd
SHA14be277c022f5317575e4c7ccedcd3da254e5845e
SHA2562877ed98291b0c475cf9b02fab9baf6d71fa921c4d44357c61e3d7a8714debf1
SHA512064c78c0315da4bc4dccdf80836d29c7e4b66ce5a4b04a98ebe007062f7701898a72ff1b5b4c2f3fc15b994e131afd5f92a456848fb63110f6a39adf6e6a26f0
-
\??\c:\Program Files\bxles\jgeot.dllFilesize
228KB
MD5264731269e832402923ffc41076269c4
SHA1e2b2eb8fd72d11c4ac07cf09a605c1ee3264a5ad
SHA25617b025d535f114a911bb03b17be34f3a70cb91ebcac9f001f43873ad8370eacf
SHA512d6cee88d38642760da58e544b3f26ff773f029169e573b2e739e13e6deb31da793d1c079c81ac950e8dfcf3882f6e6105ffe3857ad69128ce76aeb61428916ac
-
memory/2900-0-0x0000000000400000-0x0000000000464000-memory.dmpFilesize
400KB
-
memory/2900-4-0x0000000000400000-0x0000000000464000-memory.dmpFilesize
400KB
-
memory/3364-10-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB
-
memory/3364-11-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB
-
memory/3364-13-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB
-
memory/3596-7-0x0000000000400000-0x0000000000464000-memory.dmpFilesize
400KB