isrstealer | 775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba

Analysis

max time kernel
47s
max time network
52s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
06-12-2022 09:32

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General

Target

775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
Size

465KB
MD5

d4c4bd33eea49d0a477b793866a6f771
SHA1

807a64d38e6d159dc11d99c7c85693905050e014
SHA256

775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba
SHA512

c29871102c6d98c02f88c9f9cb86c691d78bf63cc4f78aebd97aff91ee6f06ab8de9f4dfb43d8bb76cb7874b0b6e9a92367eec86bceb8a9b855f3e20894310b9
SSDEEP

12288:zM/Y74wZDhvUWQopQdqSJ2eya9HaIuI3SeZ0Opu2:Y/4hiwSJay53SeZ0Opu2

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/1704-64-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral1/memory/1704-74-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral1/memory/1704-79-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral1/memory/1704-82-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1704-57-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1704-59-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1704-60-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1704-63-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1704-64-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/268-68-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/268-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/268-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1704-74-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/268-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/268-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1704-79-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1704-82-0x0000000000400000-0x0000000000448000-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 1416 set thread context of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1704 set thread context of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 set thread context of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 2032	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	27
PID 1416 wrote to memory of 2032	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	27
PID 1416 wrote to memory of 2032	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	27
PID 1416 wrote to memory of 2032	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	27
PID 1416 wrote to memory of 2028	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	28
PID 1416 wrote to memory of 2028	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	28
PID 1416 wrote to memory of 2028	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	28
PID 1416 wrote to memory of 2028	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	28
PID 1416 wrote to memory of 1936	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	29
PID 1416 wrote to memory of 1936	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	29
PID 1416 wrote to memory of 1936	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	29
PID 1416 wrote to memory of 1936	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	29
PID 1416 wrote to memory of 1720	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	30
PID 1416 wrote to memory of 1720	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	30
PID 1416 wrote to memory of 1720	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	30
PID 1416 wrote to memory of 1720	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	30
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1416 wrote to memory of 1704	1416	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	31
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 268	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	32
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35
PID 1704 wrote to memory of 1968	1704	775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe	35

C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
"C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1416
- C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
  "C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe"
  2⤵
  PID:2032
- C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
  "C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe"
  2⤵
  PID:2028
- C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
  "C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe"
  2⤵
  PID:1936
- C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
  "C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe"
  2⤵
  PID:1720
- C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
  "C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\gu3i6gr3zW.ini"
    3⤵
    PID:268
- - C:\Users\Admin\AppData\Local\Temp\775bd583bd249491ab0f2a897bd07d929f88dbfed965ad042366d42534e4bcba.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\roiikvFeam.ini"
    3⤵
    PID:1968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gu3i6gr3zW.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/268-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/268-68-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/268-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/268-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/268-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1416-65-0x00000000742C0000-0x000000007486B000-memory.dmp

Filesize
5.7MB

Download
memory/1416-55-0x00000000742C0000-0x000000007486B000-memory.dmp

Filesize
5.7MB

Download
memory/1416-54-0x0000000074DC1000-0x0000000074DC3000-memory.dmp

Filesize
8KB

Download
memory/1704-79-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-56-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-82-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-63-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-74-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-60-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-59-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-57-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1704-64-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download