isrstealer | af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620 | Triage

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Overview

overview

Static

static

af587519ae...20.exe

windows7-x64

af587519ae...20.exe

windows10-2004-x64

Sharing

General

Target

af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620
Size

936KB
Sample

221020-bqwc5agfak
MD5

93afcb782bfddfb4f60d114fe22fc05e
SHA1

0125f4eb7cbd4eb14fedb74c3444a5ca50be8b24
SHA256

af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620
SHA512

55dc4e2167a397187609bdf5cc3fddb874d3a58c70fd522b56bca396bcddda1ab73c08e413455a97ba2bf5c6ab8de2af888b76400e1a4e645984590d3686cdb7
SSDEEP

12288:Cat0EAH49n8BOaQWVZXN4xxN5nltL0LkbUcpC/SDbO86Cuw78YOJEn1GUEVQqYHI:tt24byZKxldbouu68GGUEtsh7N1tEuc

Score

10^/10

isrstealer collection evasion persistence stealer trojan upx

Static task

static1

Behavioral task

behavioral1

Sample

af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620.exe

Resource

win7-20220812-en

isrstealer collection evasion persistence stealer trojan upx

windows7-x64

16 signatures

150 seconds

Behavioral task

behavioral2

Sample

af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620.exe

Resource

win10v2004-20220812-en

isrstealer collection evasion persistence stealer trojan upx

windows10-2004-x64

17 signatures

150 seconds

Malware Config

Targets

- Target
  
  af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620
- Size
  
  936KB
- MD5
  
  93afcb782bfddfb4f60d114fe22fc05e
- SHA1
  
  0125f4eb7cbd4eb14fedb74c3444a5ca50be8b24
- SHA256
  
  af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620
- SHA512
  
  55dc4e2167a397187609bdf5cc3fddb874d3a58c70fd522b56bca396bcddda1ab73c08e413455a97ba2bf5c6ab8de2af888b76400e1a4e645984590d3686cdb7
- SSDEEP
  
  12288:Cat0EAH49n8BOaQWVZXN4xxN5nltL0LkbUcpC/SDbO86Cuw78YOJEn1GUEVQqYHI:tt24byZKxldbouu68GGUEtsh7N1tEuc
Score

10^/10

isrstealer collection evasion persistence stealer trojan upx
- ISR Stealer
  ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
  trojan stealer isrstealer
- ISR Stealer payload
- NirSoft MailPassView
  Password recovery tool for various email clients
- Nirsoft
- Executes dropped EXE
- UPX packed file
  Detects executables packed with UPX/modified UPX open source packer.
  upx
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL
- Accesses Microsoft Outlook accounts
  collection
- Adds Run key to start application
  persistence
- Checks whether UAC is enabled
  evasion trojan
- Suspicious use of SetThreadContext
behavioral1 behavioral2

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Privilege Escalation

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Email Collection

Command and Control

Exfiltration

Impact

Tasks

static1

behavioral1

isrstealercollectionevasionpersistencestealertrojanupx

behavioral2

isrstealercollectionevasionpersistencestealertrojanupx

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