isrstealer | 9514c96ca877e13960c07ba58f54091df835f1f5b4135c16f9dc4cd78928c85c

General

Target

123ead4a0cba2ca67d621f835011e12f.exe
Size

351KB
MD5

123ead4a0cba2ca67d621f835011e12f
SHA1

d28b7f8946faaebe82ce8cc36cce0df640a2c5b5
SHA256

9514c96ca877e13960c07ba58f54091df835f1f5b4135c16f9dc4cd78928c85c
SHA512

7c8413d165b74ba39c4272ca4dc851d8ceb837eaa251aaf41d66ab43fc7b8bd606a0da0469b533a14ff0b34c55fc87dc8c619c629bd18926ddd82660baae0299
SSDEEP

6144:VpQz6Vc6iK52P9osBDxioZPo35ruomQ2m1XrP1Dnoez844Y2nm7zHQD1vxSN:V6QniK5SBEzsI3BrP1bHg4HNPwRvc

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 3 IoCs

resource	yara_rule
behavioral1/memory/2792-15-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2792-11-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2792-31-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

pid	Process
2792	vbc.exe
2824	vbc.exe

Loads dropped DLL 2 IoCs

pid	Process
628	123ead4a0cba2ca67d621f835011e12f.exe
2792	vbc.exe

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
T1552.001

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2824-28-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2824-30-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2824-29-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2824-25-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2824-34-0x0000000000400000-0x0000000000453000-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 628 set thread context of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 2792 set thread context of 2824	2792	vbc.exe	18

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
628	123ead4a0cba2ca67d621f835011e12f.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	628	123ead4a0cba2ca67d621f835011e12f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2792	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 628 wrote to memory of 2792	628	123ead4a0cba2ca67d621f835011e12f.exe	19
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18
PID 2792 wrote to memory of 2824	2792	vbc.exe	18

C:\Users\Admin\AppData\Local\Temp\123ead4a0cba2ca67d621f835011e12f.exe
"C:\Users\Admin\AppData\Local\Temp\123ead4a0cba2ca67d621f835011e12f.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:628
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2792

C:\Users\Admin\AppData\Local\Temp\vbc.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\j2re8628qh.ini"
1⤵
- Executes dropped EXE
PID:2824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/628-19-0x0000000074310000-0x00000000748BB000-memory.dmp

Filesize
5.7MB

Download
memory/628-2-0x0000000074310000-0x00000000748BB000-memory.dmp

Filesize
5.7MB

Download
memory/628-0-0x0000000074310000-0x00000000748BB000-memory.dmp

Filesize
5.7MB

Download
memory/628-1-0x0000000000450000-0x0000000000490000-memory.dmp

Filesize
256KB

Download
memory/2792-7-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2792-21-0x00000000002F0000-0x000000000034F000-memory.dmp

Filesize
380KB

Download
memory/2792-15-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2792-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2792-11-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2792-9-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2792-31-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-25-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2824-29-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2824-30-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2824-28-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2824-34-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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