9ad8c1076f01d08ecb43551e1deb7661c9835504ddd3dba2b4715c43b3b5a011

Analysis

max time kernel
117s
max time network
120s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
28-01-2024 12:35

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General

Target

7d2564fd91b3d55cc05444e5ecd130b9.exe
Size

14KB
MD5

7d2564fd91b3d55cc05444e5ecd130b9
SHA1

15e8b093cc16e88896075d53f1ffa5f6471dde98
SHA256

9ad8c1076f01d08ecb43551e1deb7661c9835504ddd3dba2b4715c43b3b5a011
SHA512

9b2050d9e750ec7e2117137520cf9ba5d0a920a54a2a256f446cb34a3f9e2dd7c0d9b711bba78b534579d72835b490a61bd33672ddf3c37f86a2ac2533d02556
SSDEEP

384:5iSFwTQthMrlZzyhWmB8dsxwf4XfSLNlZ7:5RF9ilZ2PB8dQw22b

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\catsrvwl.dll = "{AF976DCD-754F-4ac2-BE49-951DC7AA57D2}"	7d2564fd91b3d55cc05444e5ecd130b9.exe

Deletes itself 1 IoCs

pid	Process
2584	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1432	7d2564fd91b3d55cc05444e5ecd130b9.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\catsrvwl.tmp	7d2564fd91b3d55cc05444e5ecd130b9.exe
File opened for modification	C:\Windows\SysWOW64\catsrvwl.tmp	7d2564fd91b3d55cc05444e5ecd130b9.exe
File opened for modification	C:\Windows\SysWOW64\catsrvwl.nls	7d2564fd91b3d55cc05444e5ecd130b9.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AF976DCD-754F-4ac2-BE49-951DC7AA57D2}	7d2564fd91b3d55cc05444e5ecd130b9.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AF976DCD-754F-4ac2-BE49-951DC7AA57D2}\InProcServer32	7d2564fd91b3d55cc05444e5ecd130b9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AF976DCD-754F-4ac2-BE49-951DC7AA57D2}\InProcServer32\ = "C:\\Windows\\SysWow64\\catsrvwl.dll"	7d2564fd91b3d55cc05444e5ecd130b9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AF976DCD-754F-4ac2-BE49-951DC7AA57D2}\InProcServer32\ThreadingModel = "Apartment"	7d2564fd91b3d55cc05444e5ecd130b9.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1432	7d2564fd91b3d55cc05444e5ecd130b9.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1432	7d2564fd91b3d55cc05444e5ecd130b9.exe
1432	7d2564fd91b3d55cc05444e5ecd130b9.exe
1432	7d2564fd91b3d55cc05444e5ecd130b9.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1432 wrote to memory of 2584	1432	7d2564fd91b3d55cc05444e5ecd130b9.exe	28
PID 1432 wrote to memory of 2584	1432	7d2564fd91b3d55cc05444e5ecd130b9.exe	28
PID 1432 wrote to memory of 2584	1432	7d2564fd91b3d55cc05444e5ecd130b9.exe	28
PID 1432 wrote to memory of 2584	1432	7d2564fd91b3d55cc05444e5ecd130b9.exe	28

C:\Users\Admin\AppData\Local\Temp\7d2564fd91b3d55cc05444e5ecd130b9.exe
"C:\Users\Admin\AppData\Local\Temp\7d2564fd91b3d55cc05444e5ecd130b9.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1432
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\A525.tmp.bat
  2⤵
  - Deletes itself
  PID:2584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\A525.tmp.bat

Filesize
179B

MD5
1c205466e4a81981e487ad70fe9b0aea

SHA1
64993681e5fdba9ae3b0a1bbb3ae995c038b9dc2

SHA256
165a67a042fb550c711582dadf74d6212adcba26d131c6734c0b48997a089765

SHA512
404932a85f33463610f1d423ea8feee9d73b1da2e0b892f2196450bc0dcba1140c54157a45eb9f5206d48637bdf9c6933c39fa252713c37f039e9820ee759d02

Download Submit
C:\Windows\SysWOW64\catsrvwl.nls

Filesize
428B

MD5
9236c98111edb589c4793af7237eb94e

SHA1
e9c15be1e3574bc319be7c871648c8f748166881

SHA256
a795f0005cc05e6e4c2be2a3b991a1d9ef08492caea1eb6d8cad1c07c1b7ae0a

SHA512
d3f4a30deafe29e6078a9f28c8398ab32121d257f91532597ad88a25c99d01cb12c0bf39331590a589ad2230b0a96f9830210b25426c21fd0822c6763f6a68ba

Download Submit
C:\Windows\SysWOW64\catsrvwl.tmp

Filesize
891KB

MD5
843e4fdc2affa2d5ecfc0756b0afac49

SHA1
1865124ae42fab6139d96bfe1d8f9f6583b2c450

SHA256
b2a79e2f110ec52574fca7fe95b55e74c8f2ccc6b311c9a7abfbef01602f63b4

SHA512
8114093e82c25e377753bfc5a0f53aaaec7db9f5e9d72f6871cfe2e375bb88199dafd0e219280af44e0c16c76f08f791f40633940a93ada52f21ac140ff02199

Download Submit
memory/1432-16-0x0000000020000000-0x000000002006C000-memory.dmp

Filesize
432KB

Download
memory/1432-25-0x0000000020000000-0x000000002006C000-memory.dmp

Filesize
432KB

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