isrstealer | 1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a

General

Target

1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe
Size

783KB
MD5

fae8750fc4fbb827a87258ce330251a8
SHA1

1141f067de255d7442cfde1fc6991e20db57e4ba
SHA256

1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a
SHA512

251ecd8fda7a8cd4f5ca9c7714cbe4c5d9a12d329ae21e05757a8682b73abcc79b59d8f20105f3837eedd932c1b3473f6f58ef8fd1ae6ff3cb184692907192dc

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
behavioral2/memory/2108-10-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2108-11-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral2/memory/2108-12-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/904-23-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral2/memory/904-23-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/536-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/536-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/536-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/904-20-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/904-22-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/904-23-0x0000000000400000-0x000000000041F000-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

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4704 set thread context of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 2108 set thread context of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 set thread context of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 4704 wrote to memory of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 4704 wrote to memory of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 4704 wrote to memory of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 4704 wrote to memory of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 4704 wrote to memory of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 4704 wrote to memory of 2108	4704	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	78
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 536	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	79
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80
PID 2108 wrote to memory of 904	2108	1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe	80

C:\Users\Admin\AppData\Local\Temp\1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe
"C:\Users\Admin\AppData\Local\Temp\1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Users\Admin\AppData\Local\Temp\1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe
  "{path}"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2108
- - C:\Users\Admin\AppData\Local\Temp\1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\J6CxHUSEd9.ini"
    3⤵
    PID:536
- - C:\Users\Admin\AppData\Local\Temp\1cd12640cd035338923aac16f8cbbc1625c3cd58b9dbb38e524948554ecea48a.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\AvI4Fh9LK6.ini"
    3⤵
    PID:904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/536-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/536-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/536-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/904-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/904-22-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/904-20-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2108-12-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2108-10-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4704-0-0x0000000073FA0000-0x000000007468E000-memory.dmp

Filesize
6.9MB

Download
memory/4704-9-0x0000000007BC0000-0x0000000007BC1000-memory.dmp

Filesize
4KB

Download
memory/4704-8-0x0000000007510000-0x00000000075B7000-memory.dmp

Filesize
668KB

Download
memory/4704-7-0x0000000007230000-0x0000000007244000-memory.dmp

Filesize
80KB

Download
memory/4704-6-0x00000000075F0000-0x00000000075F1000-memory.dmp

Filesize
4KB

Download
memory/4704-5-0x0000000004AB0000-0x0000000004AB1000-memory.dmp

Filesize
4KB

Download
memory/4704-4-0x0000000004AE0000-0x0000000004AE1000-memory.dmp

Filesize
4KB

Download
memory/4704-3-0x0000000004FE0000-0x0000000004FE1000-memory.dmp

Filesize
4KB

Download
memory/4704-1-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing