isrstealer | b55acd6c457b5286581ffc4819c0229d788e7c35b624041423ae9b0834e03cdb

General

Target

5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
Size

280KB
MD5

5b62f14e5cec88f97b57b79ac610fac1
SHA1

b53849f9caf2c64561757b7936ab089ef0332e24
SHA256

b55acd6c457b5286581ffc4819c0229d788e7c35b624041423ae9b0834e03cdb
SHA512

327a7182cdbc7629a0c963f06a68eeefd6d150fe134d6a9129dce07c0474ef1eb27183bad4f378a0d8b4a1d5fb128e02bcad5a57c9ddb73bce7fee4d6f0d965e
SSDEEP

6144:agI0iAFCfPy8znist5ymykgXB2u0mRNF9sZ:O5byr2uNLF9s

Score

10^/10

isrstealer bootkit persistence 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

Processes:

resource	yara_rule
behavioral2/memory/2444-8-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/2444-10-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/2444-15-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

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

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

Processes:

5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

description	pid	Process	procid_target
PID 212 set thread context of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 4144 set thread context of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

pid	Process
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

pid	Process
212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
2444	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe

description	pid	Process	procid_target
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 212 wrote to memory of 4144	212	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	91
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92
PID 4144 wrote to memory of 2444	4144	5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe	92

C:\Users\Admin\AppData\Local\Temp\5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:212
- C:\Users\Admin\AppData\Local\Temp\5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4144
- - C:\Users\Admin\AppData\Local\Temp\5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\5b62f14e5cec88f97b57b79ac610fac1_JaffaCakes118.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/212-0-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2444-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2444-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2444-15-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4144-3-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4144-5-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4144-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads