isrstealer | 22e2af8ed2016a8eea1bd1e331e06a58f251ce6a470c657157e1c4c3f33bdb99

General

Target

e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
Size

480KB
MD5

e4ee7aca896a25d25a15e027c1f57b49
SHA1

fd92668749575773ab56e435a96a8029431e2897
SHA256

22e2af8ed2016a8eea1bd1e331e06a58f251ce6a470c657157e1c4c3f33bdb99
SHA512

b3fc31b21bf0b9938cc1b76840b1741ca0c21f9fd0340e39fd1866b28002b6be33d66705040d0cc1cde1622858fd13f63581a106c629998103cda0c61802ef82
SSDEEP

12288:jx9bxAtPcU6YEo48WgxFOMKefOrVJ6Hw8z/lwiUov:jx9b2tcnYEo3zybefcJR8z/lwiUo

Score

10^/10

isrstealer credential_access 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
behavioral2/memory/224-7-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer
behavioral2/memory/224-9-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer
behavioral2/memory/224-26-0x0000000000400000-0x0000000000451000-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

Detected Nirsoft tools 4 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/4320-19-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4320-22-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4320-24-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4320-16-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4320-19-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4320-22-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4320-24-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4320-16-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

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 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

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2964 set thread context of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 224 set thread context of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 244 set thread context of 4320	244	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	91

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	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 2964 wrote to memory of 224	2964	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	89
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 224 wrote to memory of 244	224	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	90
PID 244 wrote to memory of 4320	244	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	91
PID 244 wrote to memory of 4320	244	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	91
PID 244 wrote to memory of 4320	244	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	91
PID 244 wrote to memory of 4320	244	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	91
PID 244 wrote to memory of 4320	244	e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe	91

C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2964
- C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:224
- - C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:244
  - - C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\e4ee7aca896a25d25a15e027c1f57b49_JaffaCakes118.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      System Location Discovery: System Language Discovery
      PID:4320

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

memory/224-26-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/224-7-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/224-9-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/244-13-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/244-21-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/244-14-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/244-15-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/244-12-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/2964-3-0x0000000002BF0000-0x0000000002BF1000-memory.dmp

Filesize
4KB

Download
memory/2964-6-0x0000000002CB0000-0x0000000002CB1000-memory.dmp

Filesize
4KB

Download
memory/2964-2-0x0000000002BB0000-0x0000000002BB1000-memory.dmp

Filesize
4KB

Download
memory/2964-4-0x0000000002C30000-0x0000000002C31000-memory.dmp

Filesize
4KB

Download
memory/2964-5-0x0000000002C70000-0x0000000002C71000-memory.dmp

Filesize
4KB

Download
memory/4320-19-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4320-22-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4320-24-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4320-16-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download

Analysis

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