isrstealer | 9eb54f2dbdb12b29af357d745ce033ffac85530449663b3b56fb8eedd6ec6cb5

Analysis

max time kernel
146s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
15-08-2024 05:27

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General

Target

990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe
Size

687KB
MD5

990cdcf567b0dc24659a342f270f1fa6
SHA1

852234c77b8cb64420dea90187ff4297265baec1
SHA256

9eb54f2dbdb12b29af357d745ce033ffac85530449663b3b56fb8eedd6ec6cb5
SHA512

9a68f3dac1c004377d41dd3b737d890142eab4a9b38dcd1c2c3a1bc31ccce9b27b4f53ad3e8cc31eed473e4a2b9b8720e77573cc839bc85ca83aff186ab60980
SSDEEP

12288:tKVaEHXeSxUflzrZpvnSg5TORpc8UjlyZkagldPKNr:IZXevvnSgc3eyZu8

Score

10^/10

isrstealer discovery persistence spyware stealer trojan

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 3 IoCs

resource	yara_rule
behavioral2/memory/5052-5-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/5052-9-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/5052-23-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
5052	svchost.exe
876	WinRAR.exe

Modifies system executable filetype association 2 TTPs 4 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\	WinRAR.exe

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 2 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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3104 set thread context of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87

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 3 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	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinRAR.exe

Modifies registry class 64 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000_Classes\WOW6432Node\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\DropHandler	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\DropHandler\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\WinRAR32	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\DragDropHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe\" \"%1\""	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shell\open\command	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe,0"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\ = "RAR recovery volume"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR32	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe,0"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe\" \"%1\""	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\DefaultIcon	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\DragDropHandlers\WinRAR	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\DefaultIcon	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\DragDropHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shell\open\command	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\DropHandler\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\WinRAR32	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shell	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shell\open	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\shell	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe\" \"%1\""	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\DragDropHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\DropHandler\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\WinRAR	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\ = "WinRAR ZIP archive"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shell\open	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\shell\open	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\DropHandler	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\WinRAR32	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shell	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\WinRAR	WinRAR.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
5052	svchost.exe
5052	svchost.exe
5052	svchost.exe
5052	svchost.exe
5052	svchost.exe
5052	svchost.exe
5052	svchost.exe
5052	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5052	svchost.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 5052	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	87
PID 3104 wrote to memory of 876	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	88
PID 3104 wrote to memory of 876	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	88
PID 3104 wrote to memory of 876	3104	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	88

C:\Users\Admin\AppData\Local\Temp\990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:5052
- C:\Users\Admin\AppData\Local\Temp\WinRAR.exe
  "C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\WinRAR.exe

Filesize
463KB

MD5
bc76f6f136641ff690b309f1c4227f35

SHA1
685f0a15214a5006a2c3f140d511b506f9a10a96

SHA256
90f8b69117fecf29d097977bc64d3c247fac12d1f4adedaa9cd8446f3428772a

SHA512
b7453cc7b86dbd34b8028dbad7cabb0c9e2934b3f88ec80d1e4d8c88aa95597a7b1f4f4671a0ae273ae291ef5bf13979df086af07188727476784c47bd415c46

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
34KB

MD5
e118330b4629b12368d91b9df6488be0

SHA1
ce90218c7e3b90df2a3409ec253048bb6472c2fd

SHA256
3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

SHA512
ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

Download Submit
memory/876-18-0x00000000007B0000-0x0000000000976000-memory.dmp

Filesize
1.8MB

Download
memory/876-30-0x00000000007B0000-0x0000000000976000-memory.dmp

Filesize
1.8MB

Download
memory/3104-0-0x0000000074A92000-0x0000000074A93000-memory.dmp

Filesize
4KB

Download
memory/3104-1-0x0000000074A90000-0x0000000075041000-memory.dmp

Filesize
5.7MB

Download
memory/3104-2-0x0000000074A90000-0x0000000075041000-memory.dmp

Filesize
5.7MB

Download
memory/3104-19-0x0000000074A90000-0x0000000075041000-memory.dmp

Filesize
5.7MB

Download
memory/5052-5-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5052-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5052-23-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download