isrstealer | 7475a22298e2d7bc98ba74028f1301d683ceb0a0f8dfd3f7726ef1125b4d8ae1

General

Target

JaffaCakes118_41a621493c32fa1975493817a4c86716.exe
Size

930KB
MD5

41a621493c32fa1975493817a4c86716
SHA1

b99394000492b614d35a7e48167daaa4d5c0004e
SHA256

7475a22298e2d7bc98ba74028f1301d683ceb0a0f8dfd3f7726ef1125b4d8ae1
SHA512

47a662a9c224d46030a50214cc22215754e6333c62045c0ed9e2260147f0bb7bfb007c70d40d4ba115730726e0a7edea3e70cd26d379dbb605509b1b2d3b8c05
SSDEEP

24576:haHpvTCImf64eSCuFtny8Q2AN8on6MAlQ:hYv2d64eSXg8Q568

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/3872-1-0x00000000008E0000-0x0000000000922000-memory.dmp	family_isrstealer
behavioral2/memory/3872-23-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 3 IoCs

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

resource	yara_rule
behavioral2/memory/4340-19-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4340-18-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4340-22-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4340-19-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4340-18-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4340-22-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

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-1-5-21-100612193-3312047696-905266872-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3872 set thread context of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 set thread context of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3704-4-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3704-6-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3704-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3704-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3704-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4340-14-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4340-17-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4340-19-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4340-18-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4340-22-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 3704	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	97
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101
PID 3872 wrote to memory of 4340	3872	JaffaCakes118_41a621493c32fa1975493817a4c86716.exe	101

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_41a621493c32fa1975493817a4c86716.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_41a621493c32fa1975493817a4c86716.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3872
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_41a621493c32fa1975493817a4c86716.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\1AVZmuRXpG.ini"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3704
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_41a621493c32fa1975493817a4c86716.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\tjv3jz2FlF.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:4340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\1AVZmuRXpG.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3704-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3704-4-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3704-6-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3704-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3704-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3872-0-0x0000000000400000-0x00000000004DE000-memory.dmp

Filesize
888KB

Download
memory/3872-1-0x00000000008E0000-0x0000000000922000-memory.dmp

Filesize
264KB

Download
memory/3872-23-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4340-14-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4340-17-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4340-19-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4340-18-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4340-22-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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