isrstealer | ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d

General

Target

ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
Size

316KB
MD5

df3cdfe099877b9e5d8aa57cd6ac6cc4
SHA1

4e76f3993e44826517c0d23c5357c386d2af5ae9
SHA256

ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d
SHA512

a140c963de1d70246296e263586dfda76d64629cbd83e73d440d37ed53777b57a58b403bd1504e6cd4206874976ed8a8a2e714ab3ce7dc5919b2025313ee810d
SSDEEP

6144:8F3jZLdg8k2nY3hx4rm2KNshkp3nzPO7wGfY0t1y6eeOdT:md3k2nLm2KNshq3zy/YD65KT

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 5 IoCs

resource	yara_rule
behavioral1/memory/1940-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1940-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1940-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1940-72-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1940-84-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1760-77-0x000000000041C410-mapping.dmp	MailPassView
behavioral1/memory/1760-81-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1760-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1760-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 4 IoCs

resource	yara_rule
behavioral1/memory/1760-77-0x000000000041C410-mapping.dmp	Nirsoft
behavioral1/memory/1760-81-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1760-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1760-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1000-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1760-76-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1760-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1760-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1760-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1760-83-0x0000000000400000-0x000000000041F000-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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 276 set thread context of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 1940 set thread context of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 set thread context of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 276 wrote to memory of 1940	276	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	28
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1000	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	29
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30
PID 1940 wrote to memory of 1760	1940	ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe	30

C:\Users\Admin\AppData\Local\Temp\ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
"C:\Users\Admin\AppData\Local\Temp\ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:276
- C:\Users\Admin\AppData\Local\Temp\ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
  C:\Users\Admin\AppData\Local\Temp\ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Users\Admin\AppData\Local\Temp\ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\yo1fYLoJpG.ini"
    3⤵
    PID:1000
- - C:\Users\Admin\AppData\Local\Temp\ac474724d9fb41c8252fdeb3cabae9212b7a82bbef5d48cd45aa7c53a38ed34d.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\xwv7I0uzaj.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1760

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\yo1fYLoJpG.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/276-62-0x00000000003C0000-0x00000000003C4000-memory.dmp

Filesize
16KB

Download
memory/276-54-0x00000000753C1000-0x00000000753C3000-memory.dmp

Filesize
8KB

Download
memory/1000-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1760-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1760-76-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1760-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1760-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1760-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1940-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1940-72-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1940-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1940-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1940-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1940-84-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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