isrstealer | 8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373c

Analysis

max time kernel
110s
max time network
17s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
16-12-2024 06:30

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe
Size

527KB
MD5

9078ea88145489ae166ec9c534000ff0
SHA1

3d84ed1e46534edc57b260f81e0dc5afacc78d6a
SHA256

8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373c
SHA512

f22e2e8b4448d3aa827d2f264ad02d591980209d411a432e0da1b7253b6bc6ff93ba17a8e72ddc6acdf48e128902d1ce78d829684c957e30ce3a47f5a9fbb450
SSDEEP

12288:QYBzgc7Bs/4DeYYzYBzgc783y84CGtjnVB5ONbs9Qj:QUgc7e/4jYzUgc78RQXBQhj

Score

10^/10

isrstealer discovery 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 2 IoCs

resource	yara_rule
behavioral1/memory/2872-54-0x0000000000400000-0x0000000000464000-memory.dmp	family_isrstealer
behavioral1/memory/2872-97-0x0000000000400000-0x0000000000464000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Executes dropped EXE 5 IoCs

pid	Process
2088	Patch IDM 6.xx.exe
2548	123456.exe
2872	123456.exe
2672	Patch IDM 6.xx.exe
2712	123456.exe

Loads dropped DLL 13 IoCs

pid	Process
1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe
1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe
1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe
2088	Patch IDM 6.xx.exe
2088	Patch IDM 6.xx.exe
2088	Patch IDM 6.xx.exe
2548	123456.exe
2088	Patch IDM 6.xx.exe
2672	Patch IDM 6.xx.exe
2672	Patch IDM 6.xx.exe
2672	Patch IDM 6.xx.exe
2872	123456.exe
2672	Patch IDM 6.xx.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2548 set thread context of 2872	2548	123456.exe	32
PID 2088 set thread context of 2672	2088	Patch IDM 6.xx.exe	33
PID 2872 set thread context of 2712	2872	123456.exe	34

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2672-81-0x0000000000400000-0x0000000000444000-memory.dmp	upx
behavioral1/memory/2672-77-0x0000000000400000-0x0000000000444000-memory.dmp	upx
behavioral1/memory/2672-72-0x0000000000400000-0x0000000000444000-memory.dmp	upx
behavioral1/memory/2672-66-0x0000000000400000-0x0000000000444000-memory.dmp	upx
behavioral1/memory/2672-63-0x0000000000400000-0x0000000000444000-memory.dmp	upx
behavioral1/memory/2712-88-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2672-60-0x0000000000400000-0x0000000000444000-memory.dmp	upx
behavioral1/memory/2712-90-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2712-91-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2672-92-0x0000000000400000-0x0000000000444000-memory.dmp	upx
behavioral1/memory/2712-96-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2672-98-0x0000000000230000-0x0000000000261000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	123456.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Patch IDM 6.xx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	123456.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	123456.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Patch IDM 6.xx.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe
2548	123456.exe
2088	Patch IDM 6.xx.exe
2872	123456.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2088	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	30
PID 1740 wrote to memory of 2088	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	30
PID 1740 wrote to memory of 2088	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	30
PID 1740 wrote to memory of 2088	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	30
PID 1740 wrote to memory of 2088	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	30
PID 1740 wrote to memory of 2088	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	30
PID 1740 wrote to memory of 2088	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	30
PID 1740 wrote to memory of 2548	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	31
PID 1740 wrote to memory of 2548	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	31
PID 1740 wrote to memory of 2548	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	31
PID 1740 wrote to memory of 2548	1740	8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe	31
PID 2548 wrote to memory of 2872	2548	123456.exe	32
PID 2548 wrote to memory of 2872	2548	123456.exe	32
PID 2548 wrote to memory of 2872	2548	123456.exe	32
PID 2548 wrote to memory of 2872	2548	123456.exe	32
PID 2548 wrote to memory of 2872	2548	123456.exe	32
PID 2548 wrote to memory of 2872	2548	123456.exe	32
PID 2548 wrote to memory of 2872	2548	123456.exe	32
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2088 wrote to memory of 2672	2088	Patch IDM 6.xx.exe	33
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34
PID 2872 wrote to memory of 2712	2872	123456.exe	34

C:\Users\Admin\AppData\Local\Temp\8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe
"C:\Users\Admin\AppData\Local\Temp\8429d738392a7baf7d4fe289c560dfa3233169dd234d9885452c81691b39373cN.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Users\Admin\AppData\Local\Temp\Patch IDM 6.xx.exe
  "C:\Users\Admin\AppData\Local\Temp\Patch IDM 6.xx.exe" 0
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2088
- - C:\Users\Admin\AppData\Local\Temp\Patch IDM 6.xx.exe
    "C:\Users\Admin\AppData\Local\Temp\Patch IDM 6.xx.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    PID:2672
- C:\Users\Admin\AppData\Local\Temp\123456.exe
  "C:\Users\Admin\AppData\Local\Temp\123456.exe" 0
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Users\Admin\AppData\Local\Temp\123456.exe
    C:\Users\Admin\AppData\Local\Temp\123456.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2872
  - - C:\Users\Admin\AppData\Local\Temp\123456.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\123456.exe

Filesize
299KB

MD5
8285e8a3752fe609776497efde3ddcd4

SHA1
49cf1f293cdf0271600176ce08931a022f42731d

SHA256
3c59f214ae5d53379f36522e41b71f429de802aac74951e239d17f98bda340bd

SHA512
a6bbf39a8380b076ff9f9d7c940d863d63662d6a06de53e90b857c4a15ab95ab3e65b8b5a17af25fc4da435df07ed59b562c691c38ba83e82df3dc70417b97a8

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-1163522206-1469769407-485553996-1000\88603cb2913a7df3fbd16b5f958e6447_9d81b961-0275-4281-8321-63119951606b

Filesize
51B

MD5
5fc2ac2a310f49c14d195230b91a8885

SHA1
90855cc11136ba31758fe33b5cf9571f9a104879

SHA256
374e0e2897a7a82e0e44794cad89df0f3cdd7703886239c1fe06d625efd48092

SHA512
ab46554df9174b9fe9beba50a640f67534c3812f64d96a1fb8adfdc136dfe730ca2370825cd45b7f87a544d6a58dd868cb5a3a7f42e2789f6d679dbc0fdd52c3

Download Submit
\Users\Admin\AppData\Local\Temp\Patch IDM 6.xx.exe

Filesize
215KB

MD5
9fd4ec851eea8905f5cf0e5b18928a5d

SHA1
580e42f43b3fcf72023f87a726f108f08b22d228

SHA256
eadb6538f312408451f6033bad587b34f7f5b265c76a27de12fb5ec177eaec30

SHA512
69e1ff1005afac8d050b3cf0ae9d7d2da69ca20a0b0bbee21be81bd54416dc59bd0e2d26b90e214a435bc66d35d3627798e25f1332059d3b4e164eb2f8367a35

Download Submit
\Users\Admin\AppData\Local\Temp\bassmod.dll

Filesize
9KB

MD5
780d14604d49e3c634200c523def8351

SHA1
e208ef6f421d2260070a9222f1f918f1de0a8eeb

SHA256
844eb66a10b848d3a71a8c63c35f0a01550a46d2ff8503e2ca8947978b03b4d2

SHA512
a49c030f11da8f0cdc4205c86bec00653ec2f8899983cad9d7195fd23255439291aaec5a7e128e1a103efd93b8566e86f15af89eba4efebf9debce14a7a5564b

Download Submit
memory/1740-20-0x0000000002D90000-0x0000000002DC1000-memory.dmp

Filesize
196KB

Download
memory/1740-8-0x0000000002D90000-0x0000000002DC1000-memory.dmp

Filesize
196KB

Download
memory/2088-84-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2088-36-0x0000000000230000-0x0000000000261000-memory.dmp

Filesize
196KB

Download
memory/2088-35-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2088-39-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2088-37-0x0000000000230000-0x0000000000261000-memory.dmp

Filesize
196KB

Download
memory/2088-34-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2088-12-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2548-25-0x0000000000425000-0x0000000000426000-memory.dmp

Filesize
4KB

Download
memory/2548-21-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2548-24-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2548-57-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2548-23-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2548-26-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2672-81-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2672-60-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2672-82-0x0000000000230000-0x0000000000261000-memory.dmp

Filesize
196KB

Download
memory/2672-98-0x0000000000230000-0x0000000000261000-memory.dmp

Filesize
196KB

Download
memory/2672-92-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2672-77-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2672-72-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2672-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2672-66-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2672-63-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2672-58-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2712-88-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2712-90-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2712-91-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2712-96-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2872-52-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2872-42-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2872-54-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2872-44-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2872-40-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2872-97-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2872-45-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download