166246e7db1fe6faf1e42d99528b14db2582c97ebbc45fe404bfd15d4e0871fb

Analysis

max time kernel
86s
max time network
150s
platform
windows10_x64
resource
win10v20201028
submitted
10/11/2020, 15:26

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General

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

Score

8^/10

spyware

Malware Config

Signatures

Blacklisted process makes network request 3 IoCs

flow	pid	Process
17	3756	rundll32.exe
19	3756	rundll32.exe
21	3756	rundll32.exe

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
16	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3756 set thread context of 4032	3756	rundll32.exe	80

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

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 4 IoCs

pid	Process
3756	rundll32.exe
3756	rundll32.exe
4032	svchost.exe
4032	svchost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 416 wrote to memory of 3756	416	rundll32.exe	70
PID 416 wrote to memory of 3756	416	rundll32.exe	70
PID 416 wrote to memory of 3756	416	rundll32.exe	70
PID 3756 wrote to memory of 4032	3756	rundll32.exe	80
PID 3756 wrote to memory of 4032	3756	rundll32.exe	80
PID 3756 wrote to memory of 4032	3756	rundll32.exe	80
PID 3756 wrote to memory of 4032	3756	rundll32.exe	80
PID 3756 wrote to memory of 4032	3756	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\calc.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:416
- 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:3756
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\System32\svchost.exe
    3⤵
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:4032

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4032-1-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/4032-3-0x0000000000400000-0x0000000000448000-memory.dmp

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