isrstealer | 3e2ffd1ff49fe6a8452aaa29788f6cf7b5782d6e484a242126bab99e18478cb7

General

Target

979766376499dbcd64efcfbeaa31548e_JaffaCakes118.exe
Size

572KB
MD5

979766376499dbcd64efcfbeaa31548e
SHA1

ea171016bb11882ec3d335bc52f53b3d72844ff0
SHA256

3e2ffd1ff49fe6a8452aaa29788f6cf7b5782d6e484a242126bab99e18478cb7
SHA512

9045a8ad9bf39b079ca361701c45dbfc3622179533f245988105a4f8d50a7159a357f0dba15e8fed3885abf045a9e68fdf1baa358805266d20eb00a5eeddc3af
SSDEEP

12288:B9vCVXp4IKXdHU1/jLnZkGTT2Saeva6QDQ8kGV+KfaPoJ49g4:aLhKjm9

Score

10^/10

isrstealer credential_access 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 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\439.exe	family_isrstealer

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Executes dropped EXE 2 IoCs

Processes:

439.exe439.exe

pid process

2908 439.exe
4652 439.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

pid	process
2908	439.exe
4652	439.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4652-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4652-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4652-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4652-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4652-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

Processes:

439.exe

description pid process target process

PID 2908 set thread context of 4652 2908 439.exe 439.exe

description	pid	process	target process
PID 2908 set thread context of 4652	2908	439.exe	439.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

439.exe439.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	439.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	439.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

439.exe

pid process

2908 439.exe

pid	process
2908	439.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

979766376499dbcd64efcfbeaa31548e_JaffaCakes118.exe439.exe

description	pid	process	target process
PID 3240 wrote to memory of 2908	3240	979766376499dbcd64efcfbeaa31548e_JaffaCakes118.exe	439.exe
PID 3240 wrote to memory of 2908	3240	979766376499dbcd64efcfbeaa31548e_JaffaCakes118.exe	439.exe
PID 3240 wrote to memory of 2908	3240	979766376499dbcd64efcfbeaa31548e_JaffaCakes118.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe
PID 2908 wrote to memory of 4652	2908	439.exe	439.exe

C:\Users\Admin\AppData\Local\Temp\979766376499dbcd64efcfbeaa31548e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\979766376499dbcd64efcfbeaa31548e_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3240
- C:\Users\Admin\AppData\Local\Temp\439.exe
  C:\Users\Admin\AppData\Local\Temp\439.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2908
- - C:\Users\Admin\AppData\Local\Temp\439.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\0u9zXbVvv9.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4652

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

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\0u9zXbVvv9.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\439.exe

Filesize
208KB

MD5
78f3d2ca47b53f4007bedc701fc7db99

SHA1
ec4b31f466afd849d2e8c1e6a0b5934ab3696f94

SHA256
df2f186ec0bdac75006aa8ed09bed169bc8bce66469869e2341bc24b4a4bbaab

SHA512
34fcc55d2872269cfdf659a24b1adfb8174290dc2b00ab170782a92e243c8ff016d63e3916604618609d271d95c49bb47bfb3dbb0a7905c09312337c7f31db53

Download Submit
memory/3240-0-0x00007FFEC3E25000-0x00007FFEC3E26000-memory.dmp

Filesize
4KB

Download
memory/3240-1-0x000000001B8C0000-0x000000001B966000-memory.dmp

Filesize
664KB

Download
memory/3240-2-0x00007FFEC3B70000-0x00007FFEC4511000-memory.dmp

Filesize
9.6MB

Download
memory/3240-7-0x00007FFEC3B70000-0x00007FFEC4511000-memory.dmp

Filesize
9.6MB

Download
memory/3240-22-0x00007FFEC3B70000-0x00007FFEC4511000-memory.dmp

Filesize
9.6MB

Download
memory/4652-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4652-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4652-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4652-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4652-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads