isrstealer | c45258fce9aa3ca55e4c3cefeca6c4b6a7d03ef53be0da688a2e54b642562735

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-10-2024 02:02

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General

Target

5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
Size

468KB
MD5

5a515fb7d8ddc91230940f85120f9ff3
SHA1

a62d7292a968bdc478aed3f700fded2b58a25deb
SHA256

c45258fce9aa3ca55e4c3cefeca6c4b6a7d03ef53be0da688a2e54b642562735
SHA512

147464ddb8b2691a124f75690478e4027eaaf432d00c569a3d36fc6b910144ebbf1f784458784ed0caf54e044c3d6c2aa400ff1202a0e3a5c0bdcd5fbf6b05c2
SSDEEP

6144:79d2d8lEkce/IBpoaK7IapsCrY+JkUJ9vICA+JzRbKdMhA6ziHberIrVmce:pdJlU8IUZIaL3kUfA+1RedCi4iVje

Score

10^/10

isrstealer collection discovery 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 5 IoCs

resource	yara_rule
behavioral2/memory/2336-38-0x0000000000400000-0x0000000000476000-memory.dmp	family_isrstealer
behavioral2/memory/2336-40-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/2336-5-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/2336-4-0x0000000000400000-0x0000000000476000-memory.dmp	family_isrstealer
behavioral2/memory/2336-1-0x0000000000400000-0x0000000000476000-memory.dmp	family_isrstealer

Detected Nirsoft tools 10 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3964-29-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/808-35-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/808-36-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/808-33-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4324-28-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4324-20-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3964-16-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4324-22-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4324-21-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3964-12-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/808-35-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/808-36-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/808-33-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3964-29-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3964-16-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3964-12-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 4920 set thread context of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 2336 set thread context of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 4384 set thread context of 3964	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	100
PID 4384 set thread context of 4324	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	101
PID 4384 set thread context of 808	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	102

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4324-17-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/808-32-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/808-35-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/808-36-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/808-33-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/808-23-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4324-28-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4324-20-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4324-22-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4324-21-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4324-13-0x0000000000400000-0x0000000000426000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
4324	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
4324	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4324	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 4920 wrote to memory of 2336	4920	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	98
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 2336 wrote to memory of 4384	2336	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	99
PID 4384 wrote to memory of 3964	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	100
PID 4384 wrote to memory of 3964	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	100
PID 4384 wrote to memory of 3964	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	100
PID 4384 wrote to memory of 3964	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	100
PID 4384 wrote to memory of 3964	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	100
PID 4384 wrote to memory of 4324	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	101
PID 4384 wrote to memory of 4324	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	101
PID 4384 wrote to memory of 4324	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	101
PID 4384 wrote to memory of 4324	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	101
PID 4384 wrote to memory of 4324	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	101
PID 4384 wrote to memory of 808	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	102
PID 4384 wrote to memory of 808	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	102
PID 4384 wrote to memory of 808	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	102
PID 4384 wrote to memory of 808	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	102
PID 4384 wrote to memory of 808	4384	5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe	102

C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4920
- C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4384
  - - C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      System Location Discovery: System Language Discovery
      PID:3964
  - - C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4324
  - - C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\5a515fb7d8ddc91230940f85120f9ff3_JaffaCakes118.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/808-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/808-32-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/808-35-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/808-36-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/808-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2336-1-0x0000000000400000-0x0000000000476000-memory.dmp

Filesize
472KB

Download
memory/2336-4-0x0000000000400000-0x0000000000476000-memory.dmp

Filesize
472KB

Download
memory/2336-5-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2336-38-0x0000000000400000-0x0000000000476000-memory.dmp

Filesize
472KB

Download
memory/2336-40-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/3964-12-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3964-16-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3964-29-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4324-13-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4324-22-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4324-21-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4324-28-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4324-20-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4324-17-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4384-19-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4384-11-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4384-10-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4384-8-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4384-9-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4920-0-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4920-3-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download