isrstealer | 6773f95547c8f842bde7b0ff25864030d1fada8ca8f4bafaa419f964252203ff

General

Target

5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
Size

248KB
MD5

5951ee18b4eb276d7134bbda1cfe0c37
SHA1

518ab82d49fef9320c5738caf17e64b264050e57
SHA256

6773f95547c8f842bde7b0ff25864030d1fada8ca8f4bafaa419f964252203ff
SHA512

bcdacc6b1330e32d22c901caffe9e044426e7027b25e01b5f630d9ce39bd63d8c64b33d9d09af99f223d738d6c7b16f65dfe1a25eaeb394a066eb691a6ef671b
SSDEEP

6144:lugCa9IcDPCpHasBXMDsAXNb1t3CscgPfhkrhwR4UmW:r9jDaAsBiVbSvwfOrhwRr

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/3980-2-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3980-4-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3980-16-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

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 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/244-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/244-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/244-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/244-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/244-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

Processes:

5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe

description	pid	process	target process
PID 2624 set thread context of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 set thread context of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe

pid process

2624 5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
3980 5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe

pid	process
2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe

C:\Users\Admin\AppData\Local\Temp\5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Users\Admin\AppData\Local\Temp\5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3980
- - C:\Users\Admin\AppData\Local\Temp\5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:244

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\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/244-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/244-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/244-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/244-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/244-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3980-2-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3980-4-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3980-16-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

description	pid	process	target process
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 2624 wrote to memory of 3980	2624	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe
PID 3980 wrote to memory of 244	3980	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe	5951ee18b4eb276d7134bbda1cfe0c37_JaffaCakes118.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads