isrstealer | 84109b60260a022874eb5ae6b9c2fb0d5a91e03d43d0c0d3264a948fa4ff5328

Analysis

max time kernel
107s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2025, 15:17

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General

Target

JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
Size

754KB
MD5

0639b299da5714182eaedac2777ce747
SHA1

de1cfaddd2249b4bacdf923436a6bb215daacb5a
SHA256

84109b60260a022874eb5ae6b9c2fb0d5a91e03d43d0c0d3264a948fa4ff5328
SHA512

3e3b3b647d54bb39fad63c8453dfd7a4f2bc1a0f1fd417fde340cb86cb8fd2dcf8a3b7873c7d4f661d60ebfbef9d46bd5e7cd8451210a6691e0b42fc1353aab2
SSDEEP

12288:2fufAbgEdQI8cot7GKLv7vUpUe093Rdk+BTEySTlA/7E6o3xHlv727baTsBnQxfo:2f2X//AU/O0EDIGnkr

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 2 IoCs

resource	yara_rule
behavioral2/memory/3296-5-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/3296-8-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 6 IoCs

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

resource	yara_rule
behavioral2/memory/1240-16-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/364-22-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/2528-28-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/364-25-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/1240-18-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/1240-24-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2528-28-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1240-16-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/1240-18-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/1240-24-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

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-1-5-21-925314154-1797147466-1467878628-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 2416 set thread context of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 3296 set thread context of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 4440 set thread context of 1240	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	91
PID 4440 set thread context of 364	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	92
PID 4440 set thread context of 2528	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	93

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/364-22-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/2528-27-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2528-28-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2528-26-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/364-25-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/364-19-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/364-21-0x0000000000400000-0x0000000000426000-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 6 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_0639b299da5714182eaedac2777ce747.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
364	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
364	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
Token: SeDebugPrivilege	364	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 2416 wrote to memory of 3296	2416	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	89
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 3296 wrote to memory of 4440	3296	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	90
PID 4440 wrote to memory of 1240	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	91
PID 4440 wrote to memory of 1240	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	91
PID 4440 wrote to memory of 1240	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	91
PID 4440 wrote to memory of 1240	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	91
PID 4440 wrote to memory of 1240	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	91
PID 4440 wrote to memory of 364	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	92
PID 4440 wrote to memory of 364	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	92
PID 4440 wrote to memory of 364	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	92
PID 4440 wrote to memory of 364	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	92
PID 4440 wrote to memory of 364	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	92
PID 4440 wrote to memory of 2528	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	93
PID 4440 wrote to memory of 2528	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	93
PID 4440 wrote to memory of 2528	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	93
PID 4440 wrote to memory of 2528	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	93
PID 4440 wrote to memory of 2528	4440	JaffaCakes118_0639b299da5714182eaedac2777ce747.exe	93

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2416
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3296
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4440
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      System Location Discovery: System Language Discovery
      PID:1240
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:364
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0639b299da5714182eaedac2777ce747.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2528

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

memory/364-21-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/364-19-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/364-22-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/364-25-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1240-16-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1240-24-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1240-18-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2416-4-0x00000000745E0000-0x0000000074B91000-memory.dmp

Filesize
5.7MB

Download
memory/2416-0-0x00000000745E2000-0x00000000745E3000-memory.dmp

Filesize
4KB

Download
memory/2416-9-0x00000000745E0000-0x0000000074B91000-memory.dmp

Filesize
5.7MB

Download
memory/2416-3-0x00000000745E2000-0x00000000745E3000-memory.dmp

Filesize
4KB

Download
memory/2416-2-0x00000000745E0000-0x0000000074B91000-memory.dmp

Filesize
5.7MB

Download
memory/2416-1-0x00000000745E0000-0x0000000074B91000-memory.dmp

Filesize
5.7MB

Download
memory/2528-27-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2528-28-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2528-26-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3296-5-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/3296-8-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4440-13-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4440-29-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4440-12-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4440-15-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4440-14-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download