isrstealer | a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 20:56

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General

Target

a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe
Size

208KB
MD5

4c424d529c60ed2ac464762ae68e5ff7
SHA1

86ef74ad23b5c982ac252b45cdeb155ed0c95c77
SHA256

a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c
SHA512

548ba0206f0e03848ef09e4263f155a026bb78c841abcab3bcf97a4d79cd118066bdbd2fe3ebbadcfd8ae9281f959ecd045e5c9936ec204955bfef853fc15358
SSDEEP

6144:Z3bdXPx3KdIKCC0ef//uXltKc+LVsz9b8:tKdFeCXuLKcCVsz6

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

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5084-135-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-137-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-140-0x0000000000400000-0x0000000000453000-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 1 IoCs

description	pid	Process	procid_target
PID 2732 set thread context of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76
PID 2732 wrote to memory of 5084	2732	a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe	76

C:\Users\Admin\AppData\Local\Temp\a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe
"C:\Users\Admin\AppData\Local\Temp\a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Users\Admin\AppData\Local\Temp\a1c2171ea29ac2195cac75a2a1061f4e05bf162177f6fee62a795b2ce8729b2c.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\h265MpgsdF.ini"
  2⤵
  PID:5084

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\h265MpgsdF.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/5084-135-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-137-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download