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 6 IoCs

resource	yara_rule
behavioral1/memory/2008-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2008-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2008-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/2008-72-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2008-77-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2008-85-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1920-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1920-84-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1920-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1920-84-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1484-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1920-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1920-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1920-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1920-84-0x0000000000400000-0x000000000041F000-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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 960 set thread context of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 2008 set thread context of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 set thread context of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 960 wrote to memory of 2008	960	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	27
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1484	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	28
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31
PID 2008 wrote to memory of 1920	2008	2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe	31

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:960
- 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:2008
- - C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\y5IXwGvPEp.ini"
    3⤵
    PID:1484
- - C:\Users\Admin\AppData\Local\Temp\2a5fe61d1a62b027fa486dec0ce1d977c6ab4b99894ee057bcc11458330adef8.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\FNn4q99IXB.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1920

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\y5IXwGvPEp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/960-54-0x00000000757A1000-0x00000000757A3000-memory.dmp

Filesize
8KB

Download
memory/960-62-0x0000000000220000-0x0000000000224000-memory.dmp

Filesize
16KB

Download
memory/1484-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1920-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1920-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1920-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1920-84-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2008-77-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2008-72-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2008-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2008-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2008-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2008-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2008-85-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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