isrstealer | c90a60e3ea860b308d5adcac1bd58b6f94fbea2e3a968bf5725824ce423aad0b

General

Target

88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
Size

380KB
MD5

88b32f64d48b88f4cb329dc9ec2188b9
SHA1

36dce9ff63a2fcc823c3cb1744fa27cbeaeacd76
SHA256

c90a60e3ea860b308d5adcac1bd58b6f94fbea2e3a968bf5725824ce423aad0b
SHA512

1bf414ff2fe0c12d7bd692b37dc0fab7c2dde97c9d5f6b2d384caa589ceec6fd4b930a790d7f421db7143bb374d02e965679f63957ca201bfd79f8ca5d0b3fa5
SSDEEP

6144:49HcdmPVjJx0Tqs2ElEnSTtaogKsslkmhngKsqdGqSnRAHVe9Lapgs/O8cZLAUmj:jdIJ2gsRcZLAUxMvLq8MyFqWDF

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 3 IoCs

resource	yara_rule
behavioral2/memory/4228-2-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral2/memory/4228-4-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral2/memory/4228-17-0x0000000000400000-0x0000000000433000-memory.dmp	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
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

resource	yara_rule
behavioral2/memory/3352-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3352-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3352-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3352-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3352-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3556 set thread context of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 4228 set thread context of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85

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	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 3556 wrote to memory of 4228	3556	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	84
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85
PID 4228 wrote to memory of 3352	4228	88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe	85

C:\Users\Admin\AppData\Local\Temp\88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Users\Admin\AppData\Local\Temp\88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4228
- - C:\Users\Admin\AppData\Local\Temp\88b32f64d48b88f4cb329dc9ec2188b9_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3352

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

Replay Monitor

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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/3352-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3352-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3352-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3352-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3352-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4228-2-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/4228-4-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/4228-17-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download

Analysis

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