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
behavioral2/memory/1796-138-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/1796-139-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral2/memory/1796-150-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral2/memory/1796-152-0x0000000000400000-0x0000000000433000-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/2084-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2084-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2084-148-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2084-149-0x0000000000400000-0x0000000000453000-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 3668 set thread context of 1560	3668	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	79
PID 1560 set thread context of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1796 set thread context of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81

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
1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 1560	3668	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	79
PID 3668 wrote to memory of 1560	3668	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	79
PID 3668 wrote to memory of 1560	3668	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	79
PID 3668 wrote to memory of 1560	3668	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	79
PID 3668 wrote to memory of 1560	3668	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	79
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1560 wrote to memory of 1796	1560	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	80
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81
PID 1796 wrote to memory of 2084	1796	314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe	81

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:3668
- 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:1560
- - C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1796
  - - C:\Users\Admin\AppData\Local\Temp\314a5f41f4ca7ce0873bc046f874ac21d486867b15dfe6569a3577d932bc7a6c.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
      4⤵
      PID:2084

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

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1560-133-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1560-137-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1560-141-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1796-150-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/1796-139-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/1796-152-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2084-149-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2084-148-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2084-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2084-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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