isrstealer | 0789d92055f61679e9f8975abeb60b5013a2a8b78027a6d488d35d4d97ad8c4a

General

Target

337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
Size

204KB
MD5

337e98501a057b1d83f757c8c21ef1c1
SHA1

d4afdd9550790d81a87538546c4ef7d2455cbdb2
SHA256

0789d92055f61679e9f8975abeb60b5013a2a8b78027a6d488d35d4d97ad8c4a
SHA512

ca903d11819866d3653fee85ea4a28316ef9b7d6126f2df4616f0294620e7b88f6358996decec6602556478dce1983c315df4ea5d670afe38e17ffce5cae3f76
SSDEEP

3072:vCqC5dwMY7kI/1C+xkJQi+xFNfc55st2XwF1kUH9U7/jiNwGNILV2nBcNBW:vCPwMYgI/1C+xjy

Score

10^/10

isrstealer discovery spyware stealer trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 2 IoCs

resource	yara_rule
behavioral2/memory/2180-6-0x0000000000400000-0x0000000000418000-memory.dmp	family_isrstealer
behavioral2/memory/2180-11-0x0000000000400000-0x0000000000418000-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 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 4084 set thread context of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2180-4-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/2180-2-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/2180-6-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/2180-11-0x0000000000400000-0x0000000000418000-memory.dmp	upx

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	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
2180	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86
PID 4084 wrote to memory of 2180	4084	337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe	86

C:\Users\Admin\AppData\Local\Temp\337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4084
- C:\Users\Admin\AppData\Local\Temp\337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\337e98501a057b1d83f757c8c21ef1c1_JaffaCakes118.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:2180

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/2180-4-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2180-2-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2180-6-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2180-11-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download

Analysis

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