isrstealer | c35a8b3b3b954f61354068c0fc1fa3178c866dfe0eb7c04081b3b4f76991b197

Analysis

max time kernel
92s
max time network
93s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 11:42

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General

Target
86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe
Size 866KB
Sample240531-nt78bagf55
SHA256 c35a8b3b3b954f61354068c0fc1fa3178c866dfe0eb7c04081b3b4f76991b197
MD5 86e0a65c4233d5a9d74bae394e68df0f
SHA1 cef07a38958a6a44e5a4421cde7a674a8c293c0d
SHA512 1834d2b9306e9ce84052d04ffcff5ef00caf46b3d0d1e78510ccef5d55c56eef7502b742084d7b9ce70678bc3c10d8c728a82b2c3714e01f13431353149e324b
SSDEEP 24576:hHe2nkxC790RisyxI63NHwI54nP2WUOdH2me:RgbcsyxIswI5Q2WUiH2m
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

isrstealer collection persistence 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/2972-20-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2972-23-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2972-24-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2972-48-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4384-44-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4384-45-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4384-46-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/4384-44-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4384-45-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4384-46-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe

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

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4512-32-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4512-34-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4512-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4512-35-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4512-38-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4384-41-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4384-43-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4384-44-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4384-45-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4384-46-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Admin\\AppData\\Roaming\\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe"	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 5056 set thread context of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 2972 set thread context of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 set thread context of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 5056 wrote to memory of 2972	5056	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	87
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4512	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	88
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94
PID 2972 wrote to memory of 4384	2972	86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe	94

C:\Users\Admin\AppData\Local\Temp\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5056
- C:\Users\Admin\AppData\Local\Temp\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2972
- - C:\Users\Admin\AppData\Local\Temp\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\DMZPA1Gdul.ini"
    3⤵
    PID:4512
- - C:\Users\Admin\AppData\Local\Temp\86e0a65c4233d5a9d74bae394e68df0f_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\PZBw5pp3sK.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:4384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

DMZPA1Gdul.ini

Path C:\Users\Admin\AppData\Local\Temp\DMZPA1Gdul.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

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memory/2972-20-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2972-48-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2972-23-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/2972-24-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/4384-41-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4384-43-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4384-44-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4384-45-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4384-46-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4512-38-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4512-35-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4512-36-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4512-34-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4512-32-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/5056-18-0x0000000002570000-0x0000000002571000-memory.dmp

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memory/5056-16-0x0000000002590000-0x0000000002591000-memory.dmp

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memory/5056-11-0x0000000002550000-0x0000000002552000-memory.dmp

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memory/5056-10-0x0000000002510000-0x0000000002511000-memory.dmp

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memory/5056-9-0x0000000002320000-0x0000000002321000-memory.dmp

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memory/5056-19-0x00000000027F0000-0x00000000027F1000-memory.dmp

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memory/5056-13-0x0000000002560000-0x0000000002561000-memory.dmp

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memory/5056-14-0x0000000002520000-0x0000000002521000-memory.dmp

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memory/5056-30-0x0000000002380000-0x00000000023C2000-memory.dmp

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memory/5056-28-0x0000000000400000-0x00000000006CA000-memory.dmp

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memory/5056-15-0x0000000002530000-0x0000000002531000-memory.dmp

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memory/5056-12-0x0000000002540000-0x0000000002541000-memory.dmp

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memory/5056-17-0x0000000002580000-0x0000000002581000-memory.dmp

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memory/5056-0-0x0000000000400000-0x00000000006CA000-memory.dmp

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memory/5056-2-0x00000000024E0000-0x00000000024E1000-memory.dmp

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memory/5056-3-0x0000000000840000-0x0000000000841000-memory.dmp

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memory/5056-4-0x00000000007E0000-0x00000000007E1000-memory.dmp

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memory/5056-5-0x0000000002350000-0x0000000002351000-memory.dmp

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memory/5056-6-0x0000000002340000-0x0000000002341000-memory.dmp

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memory/5056-7-0x0000000002330000-0x0000000002331000-memory.dmp

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memory/5056-8-0x0000000000850000-0x0000000000851000-memory.dmp

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memory/5056-1-0x0000000002380000-0x00000000023C2000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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