isrstealer | 314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c

General

Target

314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
Size

916KB
MD5

040cf87c3c3f1dbfe298e4726e4dedc0
SHA1

bfb1c427692d3d8a943fcc8c2404d7f413e779e4
SHA256

314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c
SHA512

ec39ef12051cb77a2c3a91f790bcf7dd9347c41d40b3b2322f2fef253cac78e8c1f83a772808568b34e1cc6ee2b3d4a10f29a0d199f401b4cf08d9fb2dfa5797
SSDEEP

24576:gRmJkcoQricOIQxiZY1iaBnKyRifvSSZBRa:VJZoQrbTFZY1iaBnV4nS8BRa

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
behavioral1/memory/2024-65-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral1/memory/2024-67-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral1/memory/2024-68-0x0000000000401130-mapping.dmp	family_isrstealer
behavioral1/memory/2024-79-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/956-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-80-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-81-0x0000000000400000-0x0000000000453000-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 3 IoCs

description	pid	Process	procid_target
PID 1352 set thread context of 1828	1352	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	27
PID 1828 set thread context of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 2024 set thread context of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1352 wrote to memory of 1828	1352	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	27
PID 1352 wrote to memory of 1828	1352	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	27
PID 1352 wrote to memory of 1828	1352	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	27
PID 1352 wrote to memory of 1828	1352	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	27
PID 1352 wrote to memory of 1828	1352	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	27
PID 1352 wrote to memory of 1828	1352	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	27
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 1828 wrote to memory of 2024	1828	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	28
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29
PID 2024 wrote to memory of 956	2024	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	29

C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
"C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1352
- C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
  "C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1828
- - C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2024
  - - C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
      4⤵
      PID:956

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

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

memory/956-81-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-80-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1352-54-0x0000000075601000-0x0000000075603000-memory.dmp

Filesize
8KB

Download
memory/1828-55-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1828-57-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1828-70-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/2024-62-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2024-67-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2024-79-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2024-63-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2024-65-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download

Analysis

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