isrstealer | ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618

Analysis

max time kernel
152s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
02/10/2022, 11:55

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General

Target
ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Size 350KB
Sample221002-n3n6ssfdcp
SHA256 ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618
MD5 6cd01c6c456e2831ecdafb575d783c4d
SHA1 4164244dcda6811f4ad239ab139f00b11381a031
SHA512 4c9e50090121f60d1fd4e19c2910a0d3c6c59364b642345e76f53fd2250316e1c6fedc3898715c97123e02c46f64689556665c775385c2cdc10f9ab6c0a82039
SSDEEP 6144:jwUSAb47OeNfJxOUwGjDkTk5y0H/1xqjlkKQb1UYcDtZsbR7f1PiIfPd:jpbx2zjDkAYM/1olkZKYchCbN8Wd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

isrstealer collection persistence 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/2592-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2592-138-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2592-153-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2592-154-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2800-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2800-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/2800-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2800-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1184-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1184-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1184-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1184-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2800-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2800-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2800-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2800-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	cvtres.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\C:\Users\Admin\AppData\Local\Temp	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe"	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\C:\Users\Admin\AppData\Local\Temp\ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\C:	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\C:\Users	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\C:\Users\Admin	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\C:\Users\Admin\AppData	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\C:\Users\Admin\AppData\Local	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3792 set thread context of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 2592 set thread context of 1184	2592	cvtres.exe	93
PID 2592 set thread context of 2800	2592	cvtres.exe	95

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2592	cvtres.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 3792 wrote to memory of 2592	3792	ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe	92
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 1184	2592	cvtres.exe	93
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95
PID 2592 wrote to memory of 2800	2592	cvtres.exe	95

C:\Users\Admin\AppData\Local\Temp\ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe
"C:\Users\Admin\AppData\Local\Temp\ea00bfb017bd00a331d033863bc4f81c626ba96668beaea703172aa4edefa618.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3792
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\hBCCmETPJN.ini"
    3⤵
    PID:1184
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\9J1GXCWZVv.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2800

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

hBCCmETPJN.ini

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

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memory/1184-141-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/1184-145-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/1184-144-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/1184-143-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/2592-138-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2592-135-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2592-153-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2592-154-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2800-148-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2800-150-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/2800-151-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2800-152-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/3792-132-0x00000000754A0000-0x0000000075A51000-memory.dmp

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memory/3792-133-0x00000000754A0000-0x0000000075A51000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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