isrstealer | a41ad4f52987447c2c9a0cebfe0e12f632b40ce22364ed95bb11aed10b28c11a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-10-2024 03:00

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General

Target

15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
Size

490KB
MD5

15e66fb87e224e9bc397dc5cf64890f5
SHA1

fc72f39c937153840ace86e2c2f0db0e372fd812
SHA256

a41ad4f52987447c2c9a0cebfe0e12f632b40ce22364ed95bb11aed10b28c11a
SHA512

7bc116dc8c91cf52c52d0ce1ef4a32cc26adfb2abf2950ea5ea2520eac0f558c0b7c92a1d9ce22d9ee1fb01b1d8ad55742ce552f1e4b689ab77f0c86231f7247
SSDEEP

12288:bWHBIZKzL7kioF9aDB7dX2BTJMM4mNkhvoa/x:bY72C9AYykhvoap

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 3 IoCs

resource	yara_rule
behavioral2/memory/560-0-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/560-2-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/560-37-0x0000000000400000-0x0000000000470000-memory.dmp	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/976-9-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/976-24-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/976-30-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/2424-34-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/60-33-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2424-25-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/2424-21-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/60-22-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/60-18-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/976-12-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/60-33-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/60-22-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/60-18-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/976-9-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/976-24-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/976-30-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/976-12-0x0000000000400000-0x0000000000454000-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-1-5-21-656926755-4116854191-210765258-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 456 set thread context of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 560 set thread context of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 2224 set thread context of 976	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	89
PID 2224 set thread context of 2424	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	90
PID 2224 set thread context of 60	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	91

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2424-10-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/2424-34-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/60-33-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2424-25-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/2424-21-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/60-22-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/60-20-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2424-19-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/60-18-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/60-17-0x0000000000400000-0x000000000041F000-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 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	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2424	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
2424	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2424	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 456 wrote to memory of 560	456	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	86
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 560 wrote to memory of 2224	560	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	88
PID 2224 wrote to memory of 976	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	89
PID 2224 wrote to memory of 976	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	89
PID 2224 wrote to memory of 976	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	89
PID 2224 wrote to memory of 976	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	89
PID 2224 wrote to memory of 976	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	89
PID 2224 wrote to memory of 2424	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	90
PID 2224 wrote to memory of 2424	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	90
PID 2224 wrote to memory of 2424	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	90
PID 2224 wrote to memory of 2424	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	90
PID 2224 wrote to memory of 2424	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	90
PID 2224 wrote to memory of 60	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	91
PID 2224 wrote to memory of 60	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	91
PID 2224 wrote to memory of 60	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	91
PID 2224 wrote to memory of 60	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	91
PID 2224 wrote to memory of 60	2224	15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe	91

C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:456
- C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:560
- - C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2224
  - - C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      System Location Discovery: System Language Discovery
      PID:976
  - - C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.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:2424
  - - C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\15e66fb87e224e9bc397dc5cf64890f5_JaffaCakes118.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:60

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

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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
memory/60-17-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/60-18-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/60-20-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/60-22-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/60-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/560-0-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/560-2-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/560-37-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/976-30-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/976-9-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/976-12-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/976-24-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2224-6-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2224-8-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2224-26-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2224-7-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2224-5-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2424-21-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2424-10-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2424-25-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2424-19-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2424-34-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download