isrstealer | a2228653372c172284e73ccc2ea18b4634eae8a9c352a2fca22c33131bbf8618

General

Target

f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe
Size

140KB
MD5

f39c9a2e23e3f3119efe4698d26b9f53
SHA1

def8046d2bd2da6a2d40061454400d6ce5c5d4af
SHA256

a2228653372c172284e73ccc2ea18b4634eae8a9c352a2fca22c33131bbf8618
SHA512

8ffe5de645e4357139fb1987b31c04542c646442212ad80d090bd20155c35008c9e847e83072a164f5ca1481881f4a36ff651eb35d3716e519ee608cbcdceae5
SSDEEP

1536:xxwQevvSjfQ2QOE/baP/8bUxwYgv16oxgyKELV5ANMz/9NEjT8NjOO8k:PiYOBTanXgvvKELVBYjT8z8k

Score

10^/10

isrstealer discovery 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 4 IoCs

resource	yara_rule
behavioral2/memory/1332-6-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1332-11-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1332-15-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1332-16-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Executes dropped EXE 1 IoCs

pid	Process
1332	dvd.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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\host = "C:\\Users\\Admin\\AppData\\Roaming\\jhgk.exe"	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4188 set thread context of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82

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	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dvd.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1332	dvd.exe
1332	dvd.exe
1332	dvd.exe
1332	dvd.exe
1332	dvd.exe
1332	dvd.exe
1332	dvd.exe
1332	dvd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1332	dvd.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82
PID 4188 wrote to memory of 1332	4188	f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe	82

C:\Users\Admin\AppData\Local\Temp\f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f39c9a2e23e3f3119efe4698d26b9f53_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4188
- C:\Users\Admin\AppData\Roaming\dvd.exe
  C:\Users\Admin\AppData\Roaming\dvd.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

C:\Users\Admin\AppData\Roaming\dvd.exe

Filesize
1KB

MD5
9ac8e81c1613f020a1c199effb9a1195

SHA1
9874e0e1ab6e4c28fe6645385a814e05302a652a

SHA256
4c74e3f2efb3f9c7dc5ec57a030ade70aad5457a92fb2dfe464738fa6d1cf651

SHA512
9a8020b5dba56f5fdf61b6377a1fe819121f063717b4f16d2f77151337d2bb6f6a149082e072292e16499a9852a08fac71e2076ce1175cd72ee524e22da293eb

Download Submit
memory/1332-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1332-11-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1332-15-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1332-16-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4188-0-0x00000000749D2000-0x00000000749D3000-memory.dmp

Filesize
4KB

Download
memory/4188-1-0x00000000749D0000-0x0000000074F81000-memory.dmp

Filesize
5.7MB

Download
memory/4188-2-0x00000000749D0000-0x0000000074F81000-memory.dmp

Filesize
5.7MB

Download
memory/4188-14-0x00000000749D0000-0x0000000074F81000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads