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 5 IoCs

resource	yara_rule
behavioral1/memory/340-59-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/340-61-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/340-62-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/340-72-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/340-74-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/520-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/520-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/520-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/520-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/520-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/520-76-0x0000000000400000-0x0000000000453000-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 1236 set thread context of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 340 set thread context of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe
340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1236 wrote to memory of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 1236 wrote to memory of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 1236 wrote to memory of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 1236 wrote to memory of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 1236 wrote to memory of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 1236 wrote to memory of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 1236 wrote to memory of 340	1236	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	28
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29
PID 340 wrote to memory of 520	340	c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe	29

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:1236
- 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:340
- - C:\Users\Admin\AppData\Local\Temp\c11aa9c584c70fac6fb7a56a98b132a0f2d524d65ca86a50d1771db51f6038fd.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\XreYeoBxda.ini"
    3⤵
    PID:520

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

memory/340-72-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/340-57-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/340-59-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/340-61-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/340-74-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/340-56-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/520-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/520-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/520-69-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download
memory/520-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/520-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/520-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/520-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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