isrstealer | cc94e513464e869cef5da4aa050de54fd8afaa879ea1ba545ac0a9a83e630a8c

Analysis

max time kernel
95s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
26/02/2025, 00:57

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General

Target

JaffaCakes118_235138719883429e805b3fd05310326a.exe
Size

329KB
MD5

235138719883429e805b3fd05310326a
SHA1

341de6cf3a38d8fe9cf1a1f3896d8741a83bf1ff
SHA256

cc94e513464e869cef5da4aa050de54fd8afaa879ea1ba545ac0a9a83e630a8c
SHA512

79925b81fab713cffd9e9609f4b7737f1d7b27e9240d8d788483e223b5b20d8b9837c1737708f702b4830b3dc06055aa25d24026b0cdf7197459af9fdd2baaa3
SSDEEP

6144:K4eZA+tMPSkR8Zbd+z6oxVr/d6bVdNKfiH/Og++H6oMdMYTyalG4:K4eZA+tMPSxZbd46GlmTOg++HKKYl

Score

10^/10

isrstealer collection discovery 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 7 IoCs

resource	yara_rule
behavioral2/memory/5080-0-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral2/memory/5080-2-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral2/memory/5080-3-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral2/memory/1896-4-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1896-6-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1896-15-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1896-16-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 3 IoCs

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

resource	yara_rule
behavioral2/memory/4584-13-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4584-12-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4584-14-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4584-13-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4584-12-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4584-14-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_235138719883429e805b3fd05310326a.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4032 set thread context of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 5080 set thread context of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 1896 set thread context of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 set thread context of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4584-9-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4584-11-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4584-13-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4584-12-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4584-14-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
748	5076	WerFault.exe	87

System Location Discovery: System Language Discovery 1 TTPs 4 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_235138719883429e805b3fd05310326a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_235138719883429e805b3fd05310326a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_235138719883429e805b3fd05310326a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_235138719883429e805b3fd05310326a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 4032 wrote to memory of 5080	4032	JaffaCakes118_235138719883429e805b3fd05310326a.exe	85
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 5080 wrote to memory of 1896	5080	JaffaCakes118_235138719883429e805b3fd05310326a.exe	86
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 5076	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	87
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97
PID 1896 wrote to memory of 4584	1896	JaffaCakes118_235138719883429e805b3fd05310326a.exe	97

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5080
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1896
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\AEhmpng7Cd.ini"
      4⤵
      PID:5076
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5076 -s 84
        5⤵
        Program crash
        
        PID:748
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\ZM5Tl3PYdI.ini"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:4584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5076 -ip 5076
1⤵
PID:2520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/1896-4-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-6-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-15-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-16-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4584-9-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4584-11-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4584-13-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4584-12-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4584-14-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/5080-0-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/5080-2-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/5080-3-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download