isrstealer | f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f

General

Target

f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe
Size

260KB
MD5

81073c86d6de7a5f189ffdc9c1e8b197
SHA1

07b9ee45dd7ffb6c50b99ec6499da72b47a3b42e
SHA256

f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f
SHA512

efae0141a7f6e3b7859d321931bed78f8376f5ba80cdfe0e33f26dd188d4b4c448bce013f8d34c61bfb704f9e10b811a557c105ed4386adbba77e96c9c4f04d5

Score

10^/10

isrstealer collection spyware stealer trojan upx

Malware Config

Signatures

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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1928-67-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral1/memory/1928-67-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1956-56-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1956-59-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1956-60-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1928-63-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1928-66-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1928-67-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1405931862-909307831-4085185274-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1112 set thread context of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 set thread context of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1956	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	27
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30
PID 1112 wrote to memory of 1928	1112	f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe	30

C:\Users\Admin\AppData\Local\Temp\f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe
"C:\Users\Admin\AppData\Local\Temp\f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1112
- C:\Users\Admin\AppData\Local\Temp\f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\k5RbAMHMJs.ini"
  2⤵
  PID:1956
- C:\Users\Admin\AppData\Local\Temp\f49ff3a304be95d48136926d0750c81a7a09ca9905e7345c7cd60ac1e799f62f.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\6gIH0E25i0.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:1928

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1928-63-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1928-66-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1928-67-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1956-56-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1956-58-0x00000000757F1000-0x00000000757F3000-memory.dmp

Filesize
8KB

Download
memory/1956-59-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1956-60-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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