isrstealer | 058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310

General

Target

058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe
Size

260KB
MD5

a91e72b6e296d7811a9a64072695f7e8
SHA1

760c8c49ffda6dd24ffc36f36a498678c32718b9
SHA256

058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310
SHA512

d254ee900598d1eaef6b629c10f2d97bcf34a732f831cf96dc861f640f54128545f54ffd204389796dd29a3ecd0432f47f1f1c2d78ddb4dad62db7cffb0712a6

Score

10^/10

isrstealer collection spyware stealer suricata trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer
suricata: ET MALWARE ISRStealer Checkin
suricata: ET MALWARE ISRStealer Checkin
suricata

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1108-64-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1108-65-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1108-64-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1108-65-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/792-56-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/792-58-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/792-59-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1108-62-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1108-64-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1108-65-0x0000000000400000-0x000000000041F000-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-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1844 set thread context of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 set thread context of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 792	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	27
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30
PID 1844 wrote to memory of 1108	1844	058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe	30

C:\Users\Admin\AppData\Local\Temp\058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe
"C:\Users\Admin\AppData\Local\Temp\058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1844
- C:\Users\Admin\AppData\Local\Temp\058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\Vq2GtwAu8x.ini"
  2⤵
  PID:792
- C:\Users\Admin\AppData\Local\Temp\058d31e2ec907017fd99c0ccd4dadab13da0feb273ceee1536ef05c25b775310.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\gNn1AkaCEw.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:1108

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/792-56-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/792-57-0x0000000075341000-0x0000000075343000-memory.dmp

Filesize
8KB

Download
memory/792-58-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/792-59-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1108-62-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1108-64-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1108-65-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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