isrstealer | 38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa

Analysis

max time kernel
220s
max time network
230s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06/11/2022, 15:37

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General

Target
38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa.exe
Size 323KB
Sample221106-s2vdmsbfgr
SHA256 38858d6aa81ba13cf9d931bd3cd4cbe02f5bf0da69fffb9718df92367ec215aa
MD5 05935a31c91ca069cc81905baa44c120
SHA1 486bc61e79aaae877730060e45454ef2fe402ad4
SHA512 b8b96ca1824f2a5a8c5f3f62d80bf61144729c2be741500bd116bd40ac6494b51d9573ff60a9e9b26a1ce44fe1dbda07fa075c4b45c904946b5e81a35268ae62
SSDEEP 6144:NBiSFhKj/eCmZr6pjVZGr0vo70ZOJ6OtxDBk1hS0kZisYw0CiD:NBiSCZ0r6p5ZGrIOJl2wZisx0CiD
MD5 SHA1 SHA512 SSDEEP

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

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

EnsjZm3yli.ini

Path C:\Users\Admin\AppData\Local\Temp\EnsjZm3yli.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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