isrstealer | ac016ad4df2db0b76e890253bb5ff93d9a451818139f2ecfb500b5e267939f03

General

Target

ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
Size

288KB
MD5

ade694077a15ca8f8c2813509e359600
SHA1

59f48449c02591debc2dc176939a441123d2c978
SHA256

ac016ad4df2db0b76e890253bb5ff93d9a451818139f2ecfb500b5e267939f03
SHA512

806402ac8ec9304e957cb44a851d9e7a88484a199202b871d7f565fd78fc06c018c89ca64b36b657e22115d5a368c004480e89569a8b6c284b592f2ac4d92eae
SSDEEP

6144:2w4qIcn4zUcu+9C/WQsFCIwKC7Xa7t4KPaXKDPLRpwG:2wWYcuZeSIhC7+t4KP4iLwG

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/2776-2-0x0000000000400000-0x0000000000436000-memory.dmp	family_isrstealer
behavioral2/memory/2776-4-0x0000000000400000-0x0000000000436000-memory.dmp	family_isrstealer
behavioral2/memory/2776-16-0x0000000000400000-0x0000000000436000-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/4116-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4116-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4116-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4116-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4116-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2372 set thread context of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2776 set thread context of 4116	2776	ade694077a15ca8f8c2813509e359600_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	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2372 wrote to memory of 2776	2372	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	84
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85
PID 2776 wrote to memory of 4116	2776	ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe	85

C:\Users\Admin\AppData\Local\Temp\ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Users\Admin\AppData\Local\Temp\ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Users\Admin\AppData\Local\Temp\ade694077a15ca8f8c2813509e359600_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\yREpnWcuzv.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4116

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\yREpnWcuzv.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2776-2-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2776-4-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2776-16-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/4116-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4116-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4116-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4116-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4116-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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