isrstealer | 1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418

General

Target

1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe
Size

339KB
MD5

639a4d1d6ca2c2f4bd724742623d6b20
SHA1

43fbadcd3449f5d5d58d2e327ca0469444460a69
SHA256

1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418
SHA512

0734be9b90409b2395de6737c5dc0b44fe7b3b8058d8bf3788bf3833ae447159e0241c61a224a1f3145e81b33d25e17bc99f19d94b622871a4cf4fe522c3ca5a
SSDEEP

6144:83ZN/pQ437RzShx9BsxsoalSnEe9aKeVfZh7IMtzr1+dd/Z7zAinpoSg7vIV:MZNf7R4xbBoSSn39aKeV/BJ+VQinKrgV

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

ISR Stealer payload 5 IoCs

resource	yara_rule
behavioral2/memory/1468-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1468-138-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1468-144-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1468-154-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1468-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/32-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/32-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/32-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/32-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4656-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4656-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4656-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/32-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/32-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/32-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/32-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4656-153-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4656-156-0x0000000000400000-0x0000000000453000-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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3304 set thread context of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 1468 set thread context of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 set thread context of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3304 wrote to memory of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 3304 wrote to memory of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 3304 wrote to memory of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 3304 wrote to memory of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 3304 wrote to memory of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 3304 wrote to memory of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 3304 wrote to memory of 1468	3304	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	83
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 4656	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	84
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85
PID 1468 wrote to memory of 32	1468	1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe	85

C:\Users\Admin\AppData\Local\Temp\1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe
"C:\Users\Admin\AppData\Local\Temp\1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3304
- C:\Users\Admin\AppData\Local\Temp\1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe
  "C:\Users\Admin\AppData\Local\Temp\1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Users\Admin\AppData\Local\Temp\1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\oHcttJu1fj.ini"
    3⤵
    PID:4656
- - C:\Users\Admin\AppData\Local\Temp\1f98317dbaa020e41fbe16381ee94d8e11ef088f0fac3a44f788fe78f66c7418.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\q8vTKjJ5MF.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:32

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/32-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/32-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/32-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/32-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1468-138-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1468-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1468-155-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1468-144-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1468-154-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3304-133-0x0000000074B40000-0x00000000750F1000-memory.dmp

Filesize
5.7MB

Download
memory/3304-137-0x0000000074B40000-0x00000000750F1000-memory.dmp

Filesize
5.7MB

Download
memory/3304-132-0x0000000074B40000-0x00000000750F1000-memory.dmp

Filesize
5.7MB

Download
memory/4656-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4656-153-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4656-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4656-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4656-156-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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