isrstealer | 10448b62b88d14b89c991cdf0a16df16b6b2093d150b17a525695c6586a867ff

General

Target

JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
Size

260KB
MD5

7afc6d24be8597a755b2c186042e1274
SHA1

11486e29324e2c66f7f5881f4579fd94142b1bdc
SHA256

10448b62b88d14b89c991cdf0a16df16b6b2093d150b17a525695c6586a867ff
SHA512

2baac267f63317d29e1f769217676386977f02db164b82982f31362648ae5693032cacbe5d9bb665d4a7b2bb596266de5091a4130543a9f0df0d4f2675431ae3
SSDEEP

6144:sQaebYyFI08UsCpCqVu4eqsIIJ3aKl06pZoZ4Tv2QxQWnaJptxAco:JcIg3a36vY4TeQxjnexAc

Score

10^/10

isrstealer 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 2 IoCs

resource	yara_rule
behavioral1/memory/2052-2-0x0000000000400000-0x0000000000434000-memory.dmp	family_isrstealer
behavioral1/memory/2052-17-0x0000000000400000-0x0000000000434000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3056 set thread context of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 2052 set thread context of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2524-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2524-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2524-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2524-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2524-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2524-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 3056 wrote to memory of 2052	3056	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	30
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31
PID 2052 wrote to memory of 2524	2052	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2524

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

Loading Replay Monitor...

Downloads

memory/2052-2-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2052-17-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2524-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2524-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2524-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2524-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2524-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2524-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing