isrstealer | 82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369

General

Target

82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
Size

964KB
MD5

615df21a56a0808841a781755c4e5e70
SHA1

6079cfbb1816cb7992ae472fe805b54a9a3cf03c
SHA256

82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369
SHA512

040962c0fe921cb8c1cadbcc4e76e40977080e83f500144beb4c59b40337907649904c01557d6c55b6d8ba3c3526bd15876b89479909406a5a7c04d8529464da
SSDEEP

24576:CthEVaPqLfq0df9k3C6QTnARS6jT01bi4v+PRzu97bDLFfi6WUrALUgx9RO:aEVUcy0jB

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 4 IoCs

resource	yara_rule
behavioral1/memory/960-64-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral1/memory/960-73-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral1/memory/960-76-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral1/memory/960-89-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1576-86-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/960-87-0x00000000022A0000-0x0000000002382000-memory.dmp	MailPassView
behavioral1/memory/1576-88-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1576-90-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 4 IoCs

resource	yara_rule
behavioral1/memory/1576-86-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/960-87-0x00000000022A0000-0x0000000002382000-memory.dmp	Nirsoft
behavioral1/memory/1576-88-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1576-90-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 21 IoCs

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

upx

resource	yara_rule
behavioral1/memory/960-56-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/960-58-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/960-59-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1800-62-0x0000000000400000-0x00000000004E2000-memory.dmp	upx
behavioral1/memory/960-63-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/960-64-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1744-67-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1744-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1744-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/960-73-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1744-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/960-76-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1744-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1744-79-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1576-86-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1576-85-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1576-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/960-87-0x00000000022A0000-0x0000000002382000-memory.dmp	upx
behavioral1/memory/1576-88-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/960-89-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1576-90-0x0000000000400000-0x000000000041F000-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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/1800-62-0x0000000000400000-0x00000000004E2000-memory.dmp	autoit_exe
behavioral1/memory/960-74-0x00000000008F0000-0x00000000009D2000-memory.dmp	autoit_exe
behavioral1/memory/960-77-0x00000000008F0000-0x00000000009D2000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1800 set thread context of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 960 set thread context of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 set thread context of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29

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

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 1800 wrote to memory of 960	1800	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	27
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1744	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	28
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29
PID 960 wrote to memory of 1576	960	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	29

C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
"C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
  "C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:960
- - C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\DyxcV8eIPr.ini"
    3⤵
    PID:1744
- - C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\7yQ1XVhj0S.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1576

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\DyxcV8eIPr.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/960-73-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-55-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-58-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-59-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-74-0x00000000008F0000-0x00000000009D2000-memory.dmp

Filesize
904KB

Download
memory/960-63-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-64-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-89-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-87-0x00000000022A0000-0x0000000002382000-memory.dmp

Filesize
904KB

Download
memory/960-56-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-76-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/960-77-0x00000000008F0000-0x00000000009D2000-memory.dmp

Filesize
904KB

Download
memory/1576-85-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1576-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1576-90-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1576-86-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1576-88-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1744-79-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1744-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1744-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1744-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1744-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1744-67-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1800-54-0x0000000075771000-0x0000000075773000-memory.dmp

Filesize
8KB

Download
memory/1800-62-0x0000000000400000-0x00000000004E2000-memory.dmp

Filesize
904KB

Download

Analysis

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