isrstealer | ca9a0508098750e531fa463177c083ce1081272dd5d4171ca990452bde29b5b4

General

Target

JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe
Size

160KB
MD5

8bd0bf298b834a0b248f320b943bf92e
SHA1

1d6c81b390fd87c214efaa4fb36eb609901649bc
SHA256

ca9a0508098750e531fa463177c083ce1081272dd5d4171ca990452bde29b5b4
SHA512

2ccf5702787849b3ba7e4cdea5d746113bf0746b7d826b102692533fb1c9c433d4ff2237aedab0dc646546476809632b9514bbe00f6bd0d970c41ffb263ec2f1
SSDEEP

3072:1333CTQfE+ts5ivlINZni5StD/kJx9DYOy/WLLACxyvEL4ydXnX500NxY8Y8Zxm:13332P8s5AcZni5YknTy+LLACx0I4wXR

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/3036-22-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/3036-26-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/3036-39-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Executes dropped EXE 2 IoCs

pid	Process
2800	ÎÉùÓÈ.exe
3036	winhost.exe

Loads dropped DLL 9 IoCs

pid	Process
2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe
2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe
2800	ÎÉùÓÈ.exe
2800	ÎÉùÓÈ.exe
2800	ÎÉùÓÈ.exe
2800	ÎÉùÓÈ.exe
3036	winhost.exe
3036	winhost.exe
2708	dw20.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 2800 set thread context of 3036	2800	ÎÉùÓÈ.exe	31

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 4 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	dw20.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ÎÉùÓÈ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winhost.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3036	winhost.exe
3036	winhost.exe
3036	winhost.exe
3036	winhost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2800	ÎÉùÓÈ.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3036	winhost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2800	2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe	30
PID 2892 wrote to memory of 2800	2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe	30
PID 2892 wrote to memory of 2800	2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe	30
PID 2892 wrote to memory of 2800	2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe	30
PID 2892 wrote to memory of 2800	2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe	30
PID 2892 wrote to memory of 2800	2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe	30
PID 2892 wrote to memory of 2800	2892	JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe	30
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 3036	2800	ÎÉùÓÈ.exe	31
PID 2800 wrote to memory of 2708	2800	ÎÉùÓÈ.exe	32
PID 2800 wrote to memory of 2708	2800	ÎÉùÓÈ.exe	32
PID 2800 wrote to memory of 2708	2800	ÎÉùÓÈ.exe	32
PID 2800 wrote to memory of 2708	2800	ÎÉùÓÈ.exe	32
PID 2800 wrote to memory of 2708	2800	ÎÉùÓÈ.exe	32
PID 2800 wrote to memory of 2708	2800	ÎÉùÓÈ.exe	32
PID 2800 wrote to memory of 2708	2800	ÎÉùÓÈ.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8bd0bf298b834a0b248f320b943bf92e.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Users\Admin\AppData\Local\Temp\ÎÉùÓÈ.exe
  "C:\Users\Admin\AppData\Local\Temp\ÎÉùÓÈ.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2800
- - C:\Users\Admin\AppData\Local\Temp\winhost.exe
    C:\Users\Admin\AppData\Local\Temp\winhost.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:3036
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 612
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    PID:2708

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

Replay Monitor

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Downloads

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

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
\Users\Admin\AppData\Local\Temp\ÎÉùÓÈ.exe

Filesize
144KB

MD5
9c4b5964cb72606f6b734b79bd9d86da

SHA1
126a26dced1fb2644138f323163a8ed3f8f0d1fe

SHA256
722dd7eafa229f3984d9528cc8c66b637ea61b757f518a246898d26c82599456

SHA512
1b8d20ac2b24a39ee928dffe675601038b10d4c3751dc7bd563bb6ff6f3660ea15f803d466bd4fb809d19b23024aa32fa086a4432c430938e01e03319ef8ec12

Download Submit
memory/2800-33-0x0000000073CE0000-0x000000007428B000-memory.dmp

Filesize
5.7MB

Download
memory/2800-41-0x0000000073CE0000-0x000000007428B000-memory.dmp

Filesize
5.7MB

Download
memory/2892-0-0x0000000073CE2000-0x0000000073CE4000-memory.dmp

Filesize
8KB

Download
memory/3036-22-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3036-26-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3036-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3036-18-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3036-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3036-39-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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