isrstealer | 895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86

Analysis

max time kernel
90s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 18:27

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General

Target

895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe
Size

299KB
MD5

9fe12a07f9a466f4d53d72927b7c53af
SHA1

7ca770481dc79d99c3e73cd5da59d80cdbe0fe1e
SHA256

895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86
SHA512

5600b13824622ba6a9276b1f5171944743dccba2ae211c00abd6d9866ce39281b91aa86e91c5c7e7e2c5e23ea29d66b57459fd4fc1587387b5dbc850885a890e
SSDEEP

6144:2WFXSHcWqstITifKZwuH8F4W3cDXCqMAZJ76RBmx5LnvyP7yaO1uCfZ:XXtWhtmeqWs7UAZJrya1usZ

Score

10^/10

isrstealer 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 3 IoCs

resource	yara_rule
behavioral2/memory/3120-135-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3120-146-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3120-148-0x0000000000400000-0x0000000000432000-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/4616-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4616-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4616-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4616-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1536 set thread context of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 3120 set thread context of 4616	3120	vbc.exe	87

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3120	vbc.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1536 wrote to memory of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 1536 wrote to memory of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 1536 wrote to memory of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 1536 wrote to memory of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 1536 wrote to memory of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 1536 wrote to memory of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 1536 wrote to memory of 3120	1536	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	86
PID 3120 wrote to memory of 4616	3120	vbc.exe	87
PID 3120 wrote to memory of 4616	3120	vbc.exe	87
PID 3120 wrote to memory of 4616	3120	vbc.exe	87
PID 3120 wrote to memory of 4616	3120	vbc.exe	87
PID 3120 wrote to memory of 4616	3120	vbc.exe	87
PID 3120 wrote to memory of 4616	3120	vbc.exe	87
PID 3120 wrote to memory of 4616	3120	vbc.exe	87
PID 3120 wrote to memory of 4616	3120	vbc.exe	87

C:\Users\Admin\AppData\Local\Temp\895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe
"C:\Users\Admin\AppData\Local\Temp\895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1536
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3120
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:4616

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

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/1536-133-0x0000000075190000-0x0000000075741000-memory.dmp

Filesize
5.7MB

Download
memory/1536-139-0x0000000075190000-0x0000000075741000-memory.dmp

Filesize
5.7MB

Download
memory/1536-132-0x0000000075190000-0x0000000075741000-memory.dmp

Filesize
5.7MB

Download
memory/3120-146-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3120-135-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3120-148-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4616-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4616-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4616-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4616-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download