isrstealer | 820299f9d292eb2501ba81bad50e21ca3cb486746ed5a13133972ddfafd63fe3

General

Target

JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe
Size

1.0MB
MD5

c779bc7e8de74f93ce8b002a70c55664
SHA1

f6f23680a35df8aae6bced9cbb0e868bc985fbe8
SHA256

820299f9d292eb2501ba81bad50e21ca3cb486746ed5a13133972ddfafd63fe3
SHA512

6d4fbd9d1cdd3031381827e9e8eb41c4bacae2de7040e581121e141d87e6d67e26159edbcb7c683863fec517931d4f3f36e7cbfa2ab48a51e8636f0ff8cca490
SSDEEP

24576:pRmJkcoQricOIQxiZY1iaT/NvDAFE0u/S9LACgkOC:mJZoQrbTFZY1iaTZEWF0ko

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 4 IoCs

resource	yara_rule
behavioral2/memory/2228-27-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2228-29-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2228-43-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2228-45-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer
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 2 IoCs

description	pid	Process	procid_target
PID 2216 set thread context of 2228	2216	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	87
PID 2228 set thread context of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3092-32-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3092-35-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3092-37-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3092-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3092-41-0x0000000000400000-0x0000000000453000-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 3 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	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2216	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 2228	2216	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	87
PID 2216 wrote to memory of 2228	2216	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	87
PID 2216 wrote to memory of 2228	2216	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	87
PID 2216 wrote to memory of 2228	2216	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	87
PID 2216 wrote to memory of 2228	2216	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	87
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88
PID 2228 wrote to memory of 3092	2228	JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe	88

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe
  C:\Windows\SysWOW64\explorer.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2228
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c779bc7e8de74f93ce8b002a70c55664.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\HspGnev0jY.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3092

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

1

T1552

Credentials In Files

1

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

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\HspGnev0jY.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\aut7CB2.tmp

Filesize
208KB

MD5
17be9851d6bbf148973900a9f5ad3026

SHA1
e419349214a8743590f2a23d1b1279743e98ba2a

SHA256
58505c4b9d61e07bab0b07692fb9045b7018b70b776b6b16e94d7f3ce23cca38

SHA512
5803454d30d7b1f1283ac4a82e2b2fd24cc644efa33757c1fc622fe5da78c7042b862561d32018be1494893615058ba28fba687b11f45f2c04d8e60ff00da80e

Download Submit
memory/2228-27-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2228-29-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2228-43-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2228-45-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3092-32-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3092-35-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3092-37-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3092-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3092-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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