isrstealer | c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd

General

Target

c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe
Size

308KB
MD5

11a98277ce778f1f2dc200aa02846316
SHA1

c6b54365bcb6d42912df005f6f9effdfa4ef688a
SHA256

c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd
SHA512

4dfea0a05cac33feab07c3523defd43164f4fa66f097566f73ba5aac318196a26e6d5d5915a526dc9432e92861f55272accdece8090d7af1d85103d53a802a1c
SSDEEP

3072:9YbmE/CXez1TggMQoXF1nnjioXA4sqw2KJrYlVH7QzFBxaquRtrfkxAVw9aap2XY:KKu5rOFNnj4dqCrYniEt36AtKK8QJy

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 3 IoCs

resource	yara_rule
behavioral2/memory/3464-135-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3464-145-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3464-147-0x0000000000400000-0x0000000000435000-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/432-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/432-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/432-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/432-144-0x0000000000400000-0x0000000000453000-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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5096 set thread context of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 3464 set thread context of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe
3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 5096 wrote to memory of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 5096 wrote to memory of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 5096 wrote to memory of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 5096 wrote to memory of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 5096 wrote to memory of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 5096 wrote to memory of 3464	5096	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	83
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84
PID 3464 wrote to memory of 432	3464	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	84

C:\Users\Admin\AppData\Local\Temp\c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe
"C:\Users\Admin\AppData\Local\Temp\c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5096
- C:\Users\Admin\AppData\Local\Temp\c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe
  "C:\Users\Admin\AppData\Local\Temp\c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3464
- - C:\Users\Admin\AppData\Local\Temp\c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\nF2ddHcBPv.ini"
    3⤵
    PID:432

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

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nF2ddHcBPv.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/432-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/432-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/432-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/432-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3464-135-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3464-145-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3464-147-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

Sharing