isrstealer | 9ffdc9c7ec35f2e747c109071c0ec23995a7261674d3f6915fec1e3af904a12f

Analysis

max time kernel
103s
max time network
116s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
16/03/2025, 01:36

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General

Target

JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
Size

481KB
MD5

785e50fbd71019805a7979d83a98972a
SHA1

1527ca576e292205bc084e99c439b4b42607dc1e
SHA256

9ffdc9c7ec35f2e747c109071c0ec23995a7261674d3f6915fec1e3af904a12f
SHA512

90715fd7bcfdaaefd84d5470c18a7cc169eee550dbba0c5fe065267313ae7c06c2a68053b16522022b95420099a3345076522ae9137991fee94fdfa403e0d286
SSDEEP

12288:68aXcGD59oXrDvD4d6NUJcoNLeTPmo4ydpb:iXcI59Gr7D44eYTpb

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 4 IoCs

resource	yara_rule
behavioral2/memory/224-0-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/224-2-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/224-36-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/224-37-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

Isrstealer 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/4988-9-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/1896-17-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/1896-16-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4988-13-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3532-24-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4988-31-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3532-30-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1896-29-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3532-27-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4988-20-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3532-24-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3532-30-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3532-27-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4988-9-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4988-13-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4988-31-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4988-20-0x0000000000400000-0x0000000000454000-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-1-5-21-869607583-2483572573-2297019986-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 224 set thread context of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 5072 set thread context of 4988	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	90
PID 5072 set thread context of 1896	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	91
PID 5072 set thread context of 3532	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	92

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1896-11-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/1896-17-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/1896-15-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/1896-16-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3532-24-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3532-30-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1896-29-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3532-27-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3532-23-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3532-21-0x0000000000400000-0x000000000041F000-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	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1896	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
1896	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1896	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 2280 wrote to memory of 224	2280	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	88
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 224 wrote to memory of 5072	224	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	89
PID 5072 wrote to memory of 4988	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	90
PID 5072 wrote to memory of 4988	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	90
PID 5072 wrote to memory of 4988	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	90
PID 5072 wrote to memory of 4988	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	90
PID 5072 wrote to memory of 4988	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	90
PID 5072 wrote to memory of 1896	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	91
PID 5072 wrote to memory of 1896	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	91
PID 5072 wrote to memory of 1896	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	91
PID 5072 wrote to memory of 1896	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	91
PID 5072 wrote to memory of 1896	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	91
PID 5072 wrote to memory of 3532	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	92
PID 5072 wrote to memory of 3532	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	92
PID 5072 wrote to memory of 3532	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	92
PID 5072 wrote to memory of 3532	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	92
PID 5072 wrote to memory of 3532	5072	JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe	92

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:224
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5072
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      System Location Discovery: System Language Discovery
      PID:4988
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.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:1896
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_785e50fbd71019805a7979d83a98972a.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:3532

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\data.dmp

Filesize
54B

MD5
c10dbeca73f8835240e08e4511284b83

SHA1
0032f8f941cc07768189ca6ba32b1beede6b6917

SHA256
0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e

SHA512
34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967

Download Submit
memory/224-2-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/224-37-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/224-36-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/224-0-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1896-29-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1896-11-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1896-17-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1896-15-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1896-16-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3532-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3532-27-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3532-24-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3532-21-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3532-30-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4988-20-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4988-13-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4988-9-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4988-31-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/5072-26-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/5072-8-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/5072-7-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/5072-6-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/5072-5-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download