166246e7db1fe6faf1e42d99528b14db2582c97ebbc45fe404bfd15d4e0871fb

General

Target
calc.dll
Size 915KB
Sample201110-p4y4fgld1e
SHA256 166246e7db1fe6faf1e42d99528b14db2582c97ebbc45fe404bfd15d4e0871fb
MD5 15e3a3bba36953e8492a64b55be03bb7
SHA1 cf1659829d6efdf8437bce52f795d8018d4c9651
SHA512 6b861f619daebfc4b36fd6391a0ba55b8849bbdf131e8af8654e6491c67f3bde2bb486d6f3ff2de3a6e6a38b1f42c695befd306db6965dc56503e2a0898de72c
MD5 SHA1 SHA512

Score

8^/10

spyware

Blacklisted process makes network request 3 IoCs

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
10	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1836 set thread context of 1460	1836	rundll32.exe	32

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1836	rundll32.exe
1460	svchost.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 344 wrote to memory of 1836	344	rundll32.exe	25
PID 344 wrote to memory of 1836	344	rundll32.exe	25
PID 344 wrote to memory of 1836	344	rundll32.exe	25
PID 344 wrote to memory of 1836	344	rundll32.exe	25
PID 344 wrote to memory of 1836	344	rundll32.exe	25
PID 344 wrote to memory of 1836	344	rundll32.exe	25
PID 344 wrote to memory of 1836	344	rundll32.exe	25
PID 1836 wrote to memory of 1460	1836	rundll32.exe	32
PID 1836 wrote to memory of 1460	1836	rundll32.exe	32
PID 1836 wrote to memory of 1460	1836	rundll32.exe	32
PID 1836 wrote to memory of 1460	1836	rundll32.exe	32
PID 1836 wrote to memory of 1460	1836	rundll32.exe	32
PID 1836 wrote to memory of 1460	1836	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\calc.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:344
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\calc.dll,#1
  2⤵
  - Blacklisted process makes network request
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1836
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\System32\svchost.exe
    3⤵
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:1460