isrstealer | 225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f

General

Target

225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
Size

252KB
MD5

14c6fe940d7a17dd0ca995e5ff6c903d
SHA1

2e21cb731406fb73a06d937f973c86c839ba62d7
SHA256

225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f
SHA512

971b0bbc3f7767b460fcfc424352b5f22afe8f95035ba878ba0e803af52c19deb97587c27bcc53cc6cedec57a4ec06d007818c3ec11b3ccdc096a2c9133fa937

Score

10^/10

isrstealer 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 4 IoCs

resource	yara_rule
behavioral2/memory/3144-132-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/3144-133-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3144-143-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3144-145-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3192-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3192-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3192-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3192-142-0x0000000000400000-0x0000000000453000-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

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1968 set thread context of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 3144 set thread context of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 1968 wrote to memory of 3144	1968	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	81
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82
PID 3144 wrote to memory of 3192	3144	225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe	82

C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
"C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe"
1⤵
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
  "C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3144
- - C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:3192

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3144-133-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3144-143-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3144-145-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3192-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3192-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3192-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3192-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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