isrstealer | b5d32c93e9a815f775489aa2b0ab1f86d45821df344916237746557062d7e8fb

Analysis

max time kernel
136s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11-03-2024 22:52

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General

Target

c1cfb778cbfe135b6fb0d2b6b9116b38.exe
Size

156KB
MD5

c1cfb778cbfe135b6fb0d2b6b9116b38
SHA1

f90af1a915f603a6acc40c18a5d9e8e6eef8d015
SHA256

b5d32c93e9a815f775489aa2b0ab1f86d45821df344916237746557062d7e8fb
SHA512

8ca72c995233c5c14eb9d1b6d6b1b70f72f03acbfb578743b0da8bce03b36d0d2d7e005feefb2fffd55f803e41f9e17b5be8ccc5a333a34d426545fbb6443b0a
SSDEEP

3072:+rHi7npAaojNu3LTEj+XaUC3lgosmm8O3J7We5FaOVdD4uhepQ:38jCLT0Rr3+onm/39PRHMuhep

Score

10^/10

isrstealer spyware stealer trojan

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 3 IoCs

resource	yara_rule
behavioral2/memory/4964-2-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4964-4-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4964-7-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1092 set thread context of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe
4964	c1cfb778cbfe135b6fb0d2b6b9116b38.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88
PID 1092 wrote to memory of 4964	1092	c1cfb778cbfe135b6fb0d2b6b9116b38.exe	88

C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe
"C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE
  "C:\Users\Admin\AppData\Local\Temp\c1cfb778cbfe135b6fb0d2b6b9116b38.EXE"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:4964

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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

Filesize
80KB

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

Filesize
80KB

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

Filesize
80KB

Download