isrstealer | 32a138c46072d8d2f8ccc76051e1d80ccaf827d18c535a51182674c6782d40f3

General

Target

JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe
Size

92KB
MD5

8e7f8155a6ab8221d08e84845d0d9eba
SHA1

0430dc355748ef60811b985a8792cc15e9ead7d6
SHA256

32a138c46072d8d2f8ccc76051e1d80ccaf827d18c535a51182674c6782d40f3
SHA512

8b687cc9b7eb09343f38d5b5c19b2af49aa6e2d0c0c39e189c0bb527239e2360d30ada726df82ace95d968e0627a2cc537a9c98ad1c9c9eca054b33a9bde810e
SSDEEP

1536:sBcBV9bgG3trrXduJG/R5BJ3BF/lAuDKzciDeAYsEUTIDw0LY75Lx/m:sCHBHXdu0/7L3DlpXueAfEUTIDwIY7hE

Score

10^/10

isrstealer discovery spyware stealer trojan

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
behavioral1/memory/2604-12-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2604-9-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2604-19-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Executes dropped EXE 1 IoCs

pid	Process
2604	csc.exe

Loads dropped DLL 1 IoCs

pid	Process
2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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 1 IoCs

description	pid	Process	procid_target
PID 2240 set thread context of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 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_8e7f8155a6ab8221d08e84845d0d9eba.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2604	csc.exe
2604	csc.exe
2604	csc.exe
2604	csc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2604	csc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30
PID 2240 wrote to memory of 2604	2240	JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8e7f8155a6ab8221d08e84845d0d9eba.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Users\Admin\AppData\Local\Temp\csc.exe
  C:\Users\Admin\AppData\Local\Temp\csc.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:2604

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

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\csc.exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
memory/2240-0-0x00000000748D1000-0x00000000748D2000-memory.dmp

Filesize
4KB

Download
memory/2240-1-0x00000000748D0000-0x0000000074E7B000-memory.dmp

Filesize
5.7MB

Download
memory/2240-2-0x00000000748D0000-0x0000000074E7B000-memory.dmp

Filesize
5.7MB

Download
memory/2240-18-0x00000000748D0000-0x0000000074E7B000-memory.dmp

Filesize
5.7MB

Download
memory/2604-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2604-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2604-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2604-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2604-19-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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