isrstealer | 3b72f46088f0554ee89a08507ff0695acad9c555d0f3a3858d969723cd592ac4

General

Target

JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe
Size

277KB
MD5

a2c6eb6be849b063bc45e9114f543888
SHA1

17ad7e00b27ff6605d6c9cc92e484de180fd0289
SHA256

3b72f46088f0554ee89a08507ff0695acad9c555d0f3a3858d969723cd592ac4
SHA512

4c77568c10d1774c5623eeb94e1c5141032c44c6629f3f91a77fe0e8c13a758be1d117f872de338fbf30bdce7cd9aa17b41f60482d3e04e1bf9d3e7253b593ee
SSDEEP

6144:eH0PQIW7BYcZ8jUbG5p60lM3OTS7SON/x9+jAWe6OlYmfm:eUP+F08GWiwjYmu

Score

10^/10

isrstealer 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
behavioral1/memory/2452-3-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2452-5-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2452-20-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1676 set thread context of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 2452 set thread context of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/5412-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/5412-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/5412-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/5412-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/5412-18-0x0000000000400000-0x0000000000453000-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_a2c6eb6be849b063bc45e9114f543888.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe
2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 1676 wrote to memory of 2452	1676	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	86
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87
PID 2452 wrote to memory of 5412	2452	JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe	87

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2452
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2c6eb6be849b063bc45e9114f543888.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5412

Network

MITRE ATT&CK Enterprise v16

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

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1676-0-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1676-7-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2452-3-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2452-5-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2452-20-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/5412-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5412-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5412-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5412-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5412-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing