isrstealer | 2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8

Analysis

max time kernel
91s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
03/10/2022, 08:16

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General

Target
2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
Size 444KB
Sample221003-j6fllsefg6
SHA256 2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8
MD5 54d38585e6de9f3d9b124708e1fcc0a0
SHA1 dfb01c4fab6e11a0e7355ed0a168f1472fedab40
SHA512 894638025e4602a6be67dd3024a8b7262f7fbf122ab519efa261e4c36c509b124ffcbc32e6dc4ca37758e4c9f8e1cd8e53abcaf7dfd11a72ed19189136953682
SSDEEP 6144:+RRx55b0YVOCWQf1ozGPu0BDnFwPvp0FAh+lUakxfoPXUKt8GKFq/3KWN1NRHIqx:WnBV2Qf1T5n6Pvp0WDsm1CKWNnRHIu
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 3 IoCs

resource	yara_rule
behavioral2/memory/2960-134-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2960-144-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2960-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1876-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1876-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/1876-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1876-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3344-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3344-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3344-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3344-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1876-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1876-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1876-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1876-151-0x0000000000400000-0x000000000041F000-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-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4584 set thread context of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 2960 set thread context of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 set thread context of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 4584 wrote to memory of 2960	4584	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	82
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 3344	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	84
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85
PID 2960 wrote to memory of 1876	2960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	85

C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
"C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
  C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2960
- - C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\BuVpFk9fe1.ini"
    3⤵
    PID:3344
- - C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\xVdw300OLV.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1876

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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BuVpFk9fe1.ini

Path C:\Users\Admin\AppData\Local\Temp\BuVpFk9fe1.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

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memory/1876-151-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1876-150-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1876-149-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1876-147-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2960-144-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2960-134-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2960-152-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/3344-143-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3344-142-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3344-141-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3344-139-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4584-132-0x00000000005B0000-0x00000000005B4000-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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