isrstealer | 38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa

General

Target

38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe
Size

323KB
MD5

05935a31c91ca069cc81905baa44c120
SHA1

486bc61e79aaae877730060e45454ef2fe402ad4
SHA256

38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa
SHA512

b8b96ca1824f2a5a8c5f3f62d80bf61144729c2be741500bd116bd40ac6494b51d9573ff60a9e9b26a1ce44fe1dbda07fa075c4b45c904946b5e81a35268ae62
SSDEEP

6144:NBiSFhKj/eCmZr6pjVZGr0vo70ZOJ6OtxDBk1hS0kZisYw0CiD:NBiSCZ0r6p5ZGrIOJl2wZisx0CiD

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
behavioral2/memory/1528-136-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/1528-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1528-148-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1528-157-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1884-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1884-155-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1884-156-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/1884-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1884-155-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1884-156-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4764-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4764-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4764-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4764-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1884-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1884-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1884-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1884-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1884-156-0x0000000000400000-0x000000000041F000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3108 set thread context of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 1528 set thread context of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 set thread context of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe
1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 3108 wrote to memory of 1528	3108	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	78
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 4764	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	79
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82
PID 1528 wrote to memory of 1884	1528	38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe	82

C:\Users\Admin\AppData\Local\Temp\38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe
"C:\Users\Admin\AppData\Local\Temp\38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3108
- C:\Users\Admin\AppData\Local\Temp\38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe
  "C:\Users\Admin\AppData\Local\Temp\38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1528
- - C:\Users\Admin\AppData\Local\Temp\38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\EnsjZm3yli.ini"
    3⤵
    PID:4764
- - C:\Users\Admin\AppData\Local\Temp\38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\9MqzxBkI9V.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1884

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

C:\Users\Admin\AppData\Local\Temp\EnsjZm3yli.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1528-157-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1528-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1528-148-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1884-156-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1884-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1884-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1884-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1884-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3108-139-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/3108-132-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/3108-133-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4764-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4764-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4764-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4764-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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