isrstealer | 2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8

General

Target

2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
Size

444KB
MD5

54d38585e6de9f3d9b124708e1fcc0a0
SHA1

dfb01c4fab6e11a0e7355ed0a168f1472fedab40
SHA256

2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8
SHA512

894638025e4602a6be67dd3024a8b7262f7fbf122ab519efa261e4c36c509b124ffcbc32e6dc4ca37758e4c9f8e1cd8e53abcaf7dfd11a72ed19189136953682
SSDEEP

6144:+RRx55b0YVOCWQf1ozGPu0BDnFwPvp0FAh+lUakxfoPXUKt8GKFq/3KWN1NRHIqx:WnBV2Qf1T5n6Pvp0WDsm1CKWNnRHIu

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

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\BuVpFk9fe1.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

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

Filesize
124KB

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

Filesize
124KB

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

Filesize
124KB

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

Filesize
124KB

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

Filesize
264KB

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

Filesize
264KB

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

Filesize
264KB

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

Filesize
332KB

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

Filesize
332KB

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

Filesize
332KB

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

Filesize
332KB

Download
memory/4584-132-0x00000000005B0000-0x00000000005B4000-memory.dmp

Filesize
16KB

Download

Analysis

Sharing