isrstealer | 9eb54f2dbdb12b29af357d745ce033ffac85530449663b3b56fb8eedd6ec6cb5

Analysis

max time kernel
140s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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 4 IoCs

resource	yara_rule
behavioral1/memory/1972-15-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1972-11-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1972-24-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1972-44-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

pid	Process
1972	svchost.exe
2676	WinRAR.exe

Loads dropped DLL 4 IoCs

pid	Process
524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe
524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe
2676	WinRAR.exe
2676	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 524 set thread context of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31

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

Modifies registry class 64 IoCs

description	ioc	Process
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\ContextMenuHandlers	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\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\DropHandler\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.rev	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe,1"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\DragDropHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	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\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe,0"	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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\DragDropHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shell	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\DefaultIcon	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\DragDropHandlers\WinRAR32	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\WinRAR32	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\ = "WinRAR archive"	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\ = "RAR recovery volume"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\WinRAR	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR32	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\WinRAR\DefaultIcon	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\DefaultIcon	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\	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\Directory\shellex\DragDropHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\DragDropHandlers\WinRAR	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\shell\open	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\WinRAR.ZIP\shellex\PropertySheetHandlers	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\DragDropHandlers\WinRAR32	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-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\command	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	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\WinRAR32	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\PropertySheetHandlers	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\exefile\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}\	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\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\Directory\shellex\ContextMenuHandlers\WinRAR	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shell	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\DropHandler	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\ContextMenuHandlers\WinRAR	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\Folder\shellex\DragDropHandlers\WinRAR	WinRAR.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinRAR.exe,0"	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}	WinRAR.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1972	svchost.exe
1972	svchost.exe
1972	svchost.exe
1972	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2676	WinRAR.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1972	svchost.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 1972	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	31
PID 524 wrote to memory of 2676	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	32
PID 524 wrote to memory of 2676	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	32
PID 524 wrote to memory of 2676	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	32
PID 524 wrote to memory of 2676	524	990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe	32

C:\Users\Admin\AppData\Local\Temp\990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\990cdcf567b0dc24659a342f270f1fa6_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:524
- 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:1972
- C:\Users\Admin\AppData\Local\Temp\WinRAR.exe
  "C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Modifies system executable filetype association
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  PID:2676

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

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

Replay Monitor

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Downloads

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

Filesize
463KB

MD5
bc76f6f136641ff690b309f1c4227f35

SHA1
685f0a15214a5006a2c3f140d511b506f9a10a96

SHA256
90f8b69117fecf29d097977bc64d3c247fac12d1f4adedaa9cd8446f3428772a

SHA512
b7453cc7b86dbd34b8028dbad7cabb0c9e2934b3f88ec80d1e4d8c88aa95597a7b1f4f4671a0ae273ae291ef5bf13979df086af07188727476784c47bd415c46

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

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
memory/524-1-0x0000000074610000-0x0000000074BBB000-memory.dmp

Filesize
5.7MB

Download
memory/524-2-0x0000000074610000-0x0000000074BBB000-memory.dmp

Filesize
5.7MB

Download
memory/524-0-0x0000000074611000-0x0000000074612000-memory.dmp

Filesize
4KB

Download
memory/524-32-0x0000000074610000-0x0000000074BBB000-memory.dmp

Filesize
5.7MB

Download
memory/524-30-0x00000000062B0000-0x0000000006476000-memory.dmp

Filesize
1.8MB

Download
memory/1972-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1972-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1972-24-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1972-11-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1972-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1972-15-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1972-44-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2676-31-0x00000000010E0000-0x00000000012A6000-memory.dmp

Filesize
1.8MB

Download
memory/2676-39-0x00000000039C0000-0x00000000039D0000-memory.dmp

Filesize
64KB

Download
memory/2676-46-0x00000000010E0000-0x00000000012A6000-memory.dmp

Filesize
1.8MB

Download
memory/2676-48-0x00000000039C0000-0x00000000039D0000-memory.dmp

Filesize
64KB

Download
memory/2676-50-0x00000000039C0000-0x00000000039D0000-memory.dmp

Filesize
64KB

Download