Malware Analysis Report

2024-10-19 10:27

Sample ID 240311-2tvtwaah25
Target c1cfb778cbfe135b6fb0d2b6b9116b38
SHA256 b5d32c93e9a815f775489aa2b0ab1f86d45821df344916237746557062d7e8fb
Tags
isrstealer spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

b5d32c93e9a815f775489aa2b0ab1f86d45821df344916237746557062d7e8fb

Threat Level: Known bad

The file c1cfb778cbfe135b6fb0d2b6b9116b38 was found to be: Known bad.

Malicious Activity Summary

isrstealer spyware stealer trojan

ISR Stealer

ISR Stealer payload

Reads data files stored by FTP clients

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-11 22:52

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-11 22:52

Reported

2024-03-11 22:55

Platform

win7-20240221-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

ISR Stealer payload

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

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1912 set thread context of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1912 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe

"C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe"

C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

"C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ljcp.gov.pk udp
PK 175.107.60.195:80 ljcp.gov.pk tcp

Files

memory/2576-2-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2576-7-0x0000000000400000-0x0000000000414000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-11 22:52

Reported

2024-03-11 22:55

Platform

win10v2004-20240226-en

Max time kernel

136s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

ISR Stealer payload

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

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1092 set thread context of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
PID 1092 wrote to memory of 4964 N/A C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe

"C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe"

C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

"C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ljcp.gov.pk udp
PK 175.107.60.195:80 ljcp.gov.pk tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 195.60.107.175.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 100.5.17.2.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 42.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 211.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/4964-2-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4964-4-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4964-7-0x0000000000400000-0x0000000000414000-memory.dmp