isrstealer | c94bafa46add5abf973ee5075d6cfa4ea45f3ce89b5e11f8d273642e01e66c42

General

Target

02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe
Size

652KB
MD5

02d2d449d6ebc99c02351ca0f786338d
SHA1

a0e7a10834a5dfcc7b192c157142ccca74657916
SHA256

c94bafa46add5abf973ee5075d6cfa4ea45f3ce89b5e11f8d273642e01e66c42
SHA512

7c99dd95464bbe06a500549fc7ae9599b1946eac7e0239204e83059ef405eb2805de12fb069e8d6f634d2287165ff4485ee5d5a46dd9cc213258c2b8249c36d6
SSDEEP

6144:4+im16DmFae0ieou1oG7+BRE6A+zBxil5Z32WDh5VyK1qtEhHsKfJeCyEhUw:4+iIG1Tj1oiEG6xz05ZnDly9t/KfcM

Score

10^/10

isrstealer 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

Processes:

resource	yara_rule
behavioral2/memory/2736-5-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/2736-10-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/2736-24-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

Processes:

svchost.exesvchost.exe

pid process

2736 svchost.exe
4892 svchost.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
2736	svchost.exe
4892	svchost.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4892-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4892-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4892-21-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4892-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4892-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

Processes:

02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exesvchost.exe

description	pid	process	target process
PID 1928 set thread context of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 2736 set thread context of 4892	2736	svchost.exe	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

svchost.exe

pid process

2736 svchost.exe

pid	process
2736	svchost.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exesvchost.exe

description	pid	process	target process
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 1928 wrote to memory of 2736	1928	02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe
PID 2736 wrote to memory of 4892	2736	svchost.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\02d2d449d6ebc99c02351ca0f786338d_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Users\Admin\AppData\Local\Temp\svchost.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - Executes dropped EXE
    PID:4892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

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\svchost.exe

Filesize
34KB

MD5
e118330b4629b12368d91b9df6488be0

SHA1
ce90218c7e3b90df2a3409ec253048bb6472c2fd

SHA256
3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

SHA512
ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1928-13-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/1928-2-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/1928-0-0x0000000075042000-0x0000000075043000-memory.dmp

Filesize
4KB

Download
memory/1928-1-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/2736-5-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2736-10-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2736-24-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4892-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4892-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4892-21-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4892-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4892-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads