isrstealer | 60c69015a52ab0edd4245671fbe2cdb8d2cd8ec1db66e904f8039b7ee770ed3b

Analysis

max time kernel
93s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-01-2025 15:06

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General

Target

JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
Size

523KB
MD5

cb119a6b42da7bba1b6151f2e0bd6f1e
SHA1

d24065f78cbef5a9ae8cd898202b0c0b621059fc
SHA256

60c69015a52ab0edd4245671fbe2cdb8d2cd8ec1db66e904f8039b7ee770ed3b
SHA512

235172da6120853d3d1e6e3ed3123bcbe2517dc2f8390e62f59b3f15415e1afd04f22f263e1d7e1949d4b9170c62ed0b1373ac95e11a0f97e1f0a9ca84f446cf
SSDEEP

12288:jwTIx3EovSNq63oXcMGBdVhPo1esAT0ysDC8:jw0REovSNqSkGBdVdo1TCtAC

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/2584-8-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/2584-10-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/2584-46-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/2584-47-0x0000000000400000-0x0000000000470000-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/4584-17-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/1512-26-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4176-31-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1512-34-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4176-33-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1512-29-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4584-28-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4584-21-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4584-37-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4176-41-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4176-31-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4176-33-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4176-41-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4584-17-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4584-28-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4584-21-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4584-37-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Loads dropped DLL 1 IoCs

pid	Process
4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.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 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-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe

Suspicious use of SetThreadContext 6 IoCs

description	pid	Process	procid_target
PID 4868 set thread context of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 2416 set thread context of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2584 set thread context of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2840 set thread context of 4584	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	86
PID 2840 set thread context of 1512	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	87
PID 2840 set thread context of 4176	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	88

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1512-18-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/1512-23-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/1512-26-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4176-31-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1512-34-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4176-33-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4176-30-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1512-29-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4176-24-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4176-41-0x0000000000400000-0x000000000041F000-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 7 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_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1512	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
1512	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1512	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 4868 wrote to memory of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 4868 wrote to memory of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 4868 wrote to memory of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 4868 wrote to memory of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 4868 wrote to memory of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 4868 wrote to memory of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 4868 wrote to memory of 2416	4868	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	83
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2416 wrote to memory of 2584	2416	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	84
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2584 wrote to memory of 2840	2584	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	85
PID 2840 wrote to memory of 4584	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	86
PID 2840 wrote to memory of 4584	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	86
PID 2840 wrote to memory of 4584	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	86
PID 2840 wrote to memory of 4584	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	86
PID 2840 wrote to memory of 4584	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	86
PID 2840 wrote to memory of 1512	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	87
PID 2840 wrote to memory of 1512	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	87
PID 2840 wrote to memory of 1512	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	87
PID 2840 wrote to memory of 1512	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	87
PID 2840 wrote to memory of 1512	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	87
PID 2840 wrote to memory of 4176	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	88
PID 2840 wrote to memory of 4176	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	88
PID 2840 wrote to memory of 4176	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	88
PID 2840 wrote to memory of 4176	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	88
PID 2840 wrote to memory of 4176	2840	JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe	88

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4868
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2416
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2584
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe"
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2840
    - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
        
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4584
    - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
        
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1512
    - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe
        
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb119a6b42da7bba1b6151f2e0bd6f1e.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
        5⤵
        Accesses Microsoft Outlook accounts
        System Location Discovery: System Language Discovery
        
        PID:4176

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

Replay Monitor

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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
C:\Users\Admin\AppData\Local\Temp\epbUex.UxO

Filesize
2KB

MD5
a7a21220689bd796f6b74e5d983d810e

SHA1
f80ed187bb6ef675922c27b83bdaadc00d333620

SHA256
646bac85543ef9024ba9b1536fd068ede09b904aed678a962ee1bdde62d5fda6

SHA512
3532078c5a9f8dbb29c87d2698184fa4d6c3488e61474f36a28cd5322c50ac913b9b84bd62716b02a9a320d9640298e3129e6390d0894bb045c90ad4489bfc83

Download Submit
memory/1512-18-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1512-34-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1512-29-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1512-26-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1512-23-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2416-7-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2416-6-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2416-4-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2584-46-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2584-47-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2584-10-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2584-8-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2840-16-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2840-15-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2840-13-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2840-14-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2840-25-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4176-31-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4176-30-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4176-24-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4176-41-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4176-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4584-21-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4584-37-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4584-17-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4584-28-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download