isrstealer | 7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c

Analysis

max time kernel
147s
max time network
107s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31-10-2024 08:07

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General

Target

8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe
Size

269KB
MD5

8269b1107aeefdb83374ecc9149878f5
SHA1

274e6dabe1574074fc4303167030fd21d184789e
SHA256

7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c
SHA512

f16f8c9812fd1b56093882f9d8d3bdcabb43d1fbdcedbfe6bd83cf820316a7b772a913d5a6ce61957c676f6057f9aac614a072bcbdd320c8b52379d937949b3b
SSDEEP

6144:BP8ilqgFAjN98/Un8Ple1evMigXAuQoYE1R:BP8ilPKROs8JvNgXBQPE1

Score

10^/10

isrstealer collection discovery persistence 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/4796-5-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4796-3-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4796-16-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4796-17-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 2 IoCs

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

resource	yara_rule
behavioral2/memory/4428-13-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4428-14-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4428-13-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4428-14-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1780 set thread context of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 4796 set thread context of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 set thread context of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4428-13-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4428-14-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4428-11-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4428-9-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2472	336	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 5 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	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
432	reg.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 1780 wrote to memory of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 1780 wrote to memory of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 1780 wrote to memory of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 1780 wrote to memory of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 1780 wrote to memory of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 1780 wrote to memory of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 1780 wrote to memory of 4796	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	86
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 4796 wrote to memory of 336	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	88
PID 1780 wrote to memory of 352	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	92
PID 1780 wrote to memory of 352	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	92
PID 1780 wrote to memory of 352	1780	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	92
PID 352 wrote to memory of 432	352	cmd.exe	94
PID 352 wrote to memory of 432	352	cmd.exe	94
PID 352 wrote to memory of 432	352	cmd.exe	94
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102
PID 4796 wrote to memory of 4428	4796	8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe	102

C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1780
- C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4796
- - C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\IPeYZKndzI.ini"
    3⤵
    PID:336
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 336 -s 80
      4⤵
      Program crash
      PID:2472
- - C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Eg5a7ncWxe.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4428
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Win Update" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:352
- - C:\Windows\SysWOW64\reg.exe
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Win Update" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\8269b1107aeefdb83374ecc9149878f5_JaffaCakes118.exe"
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 336 -ip 336
1⤵
PID:216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

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/1780-15-0x0000000074710000-0x0000000074CC1000-memory.dmp

Filesize
5.7MB

Download
memory/1780-1-0x0000000074710000-0x0000000074CC1000-memory.dmp

Filesize
5.7MB

Download
memory/1780-2-0x0000000074710000-0x0000000074CC1000-memory.dmp

Filesize
5.7MB

Download
memory/1780-0-0x0000000074712000-0x0000000074713000-memory.dmp

Filesize
4KB

Download
memory/1780-12-0x0000000074712000-0x0000000074713000-memory.dmp

Filesize
4KB

Download
memory/4428-11-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4428-13-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4428-14-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4428-9-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4796-3-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4796-5-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4796-16-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4796-17-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads