Malware Analysis Report

2024-10-23 19:17

Sample ID 230526-vx44dsge73
Target a1ce7b26712e1db177d86fa87d09c354.exe
SHA256 b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e
Tags
gurcu spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e

Threat Level: Known bad

The file a1ce7b26712e1db177d86fa87d09c354.exe was found to be: Known bad.

Malicious Activity Summary

gurcu spyware stealer

Gurcu, WhiteSnake

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-05-26 17:23

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-05-26 17:23

Reported

2023-05-26 17:25

Platform

win7-20230220-en

Max time kernel

63s

Max time network

54s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe"

Signatures

Gurcu, WhiteSnake

stealer gurcu

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1732 set thread context of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 1732 wrote to memory of 784 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

"C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe"

C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

"C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe"

Network

N/A

Files

memory/1732-54-0x0000000000AF0000-0x0000000000BC6000-memory.dmp

memory/1732-55-0x0000000004970000-0x00000000049B0000-memory.dmp

memory/1732-56-0x0000000000360000-0x0000000000370000-memory.dmp

memory/1732-57-0x0000000004970000-0x00000000049B0000-memory.dmp

memory/1732-58-0x00000000004A0000-0x00000000004AA000-memory.dmp

memory/1732-59-0x0000000006010000-0x00000000060A0000-memory.dmp

memory/1732-60-0x0000000004B00000-0x0000000004B5C000-memory.dmp

memory/784-61-0x0000000000400000-0x000000000045A000-memory.dmp

memory/784-62-0x0000000000400000-0x000000000045A000-memory.dmp

memory/784-63-0x0000000000400000-0x000000000045A000-memory.dmp

memory/784-64-0x0000000000400000-0x000000000045A000-memory.dmp

memory/784-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/784-66-0x0000000000400000-0x000000000045A000-memory.dmp

memory/784-68-0x0000000000400000-0x000000000045A000-memory.dmp

memory/784-70-0x0000000000400000-0x000000000045A000-memory.dmp

memory/784-71-0x00000000006C0000-0x0000000000700000-memory.dmp

memory/784-72-0x00000000006C0000-0x0000000000700000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-05-26 17:23

Reported

2023-05-26 17:25

Platform

win10v2004-20230220-en

Max time kernel

61s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe"

Signatures

Gurcu, WhiteSnake

stealer gurcu

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4144 set thread context of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4144 wrote to memory of 2776 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 2776 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 2776 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe
PID 4144 wrote to memory of 4656 N/A C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

"C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe"

C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

"C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe"

C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe

"C:\Users\Admin\AppData\Local\Temp\a1ce7b26712e1db177d86fa87d09c354.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 50.4.107.13.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 93.184.220.29:80 tcp
NL 173.223.113.131:80 tcp

Files

memory/4144-133-0x0000000000B20000-0x0000000000BF6000-memory.dmp

memory/4144-134-0x0000000005A80000-0x0000000006024000-memory.dmp

memory/4144-135-0x00000000055B0000-0x0000000005642000-memory.dmp

memory/4144-136-0x00000000057A0000-0x00000000057AA000-memory.dmp

memory/4144-137-0x0000000005760000-0x0000000005770000-memory.dmp

memory/4144-138-0x0000000005760000-0x0000000005770000-memory.dmp

memory/4144-139-0x0000000009A20000-0x0000000009ABC000-memory.dmp

memory/4656-140-0x0000000000400000-0x000000000045A000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\a1ce7b26712e1db177d86fa87d09c354.exe.log

MD5 7cad59aef5a93f093b6ba494f13f796f
SHA1 3cef97b77939bfc06dfd3946fc1a8cd159f67100
SHA256 1e1b444fe2d8772f6709b22b94bb5b0aa7fa590f6a693705d9bf1f2f71267a55
SHA512 8cedd03efec34c6226a01fd6b4831a689be16545ea6b849cd96f775e0722bfefd4b47f3dd8401d2080d341d4319f75995ece60de44352a1f86a2e5dc01e6210b