isrstealer | 3a53eda9346ab154e6b4e6ed65dda380bef32eb0a42e28ef541cbd47ceb7a433

General

Target

JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe
Size

306KB
MD5

500464ffcc8e1ad67ccf9422d1d60b17
SHA1

752857b8dceffc1e7fd5e626b27445662a08beec
SHA256

3a53eda9346ab154e6b4e6ed65dda380bef32eb0a42e28ef541cbd47ceb7a433
SHA512

da9ac7ac0f424b84b195d09d2f552583866110058da692518327419bc419faa87f2207a72988aa0837fdc9eecb4bd59e8e19c98be5dd9d2f0ed572a19a219f9d
SSDEEP

6144:cvUdSIJJXhy4dlUnxjWY/lLngffHKOH46bnVjeTtF:cvULJXhxUJYlHFbnVatF

Score

10^/10

isrstealer discovery 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 3 IoCs

resource	yara_rule
behavioral2/memory/2716-3-0x0000000000400000-0x000000000044E000-memory.dmp	family_isrstealer
behavioral2/memory/2716-5-0x0000000000400000-0x000000000044E000-memory.dmp	family_isrstealer
behavioral2/memory/2716-24-0x0000000000400000-0x000000000044E000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3172 set thread context of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 2716 set thread context of 3448	2716	Explorer.exe	88

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3448-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3448-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3448-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3448-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3448-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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_500464ffcc8e1ad67ccf9422d1d60b17.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Explorer.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe
2716	Explorer.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 3172 wrote to memory of 2716	3172	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	87
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88
PID 2716 wrote to memory of 3448	2716	Explorer.exe	88

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Windows\SysWOW64\Explorer.exe
  Explorer.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\SysWOW64\Explorer.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\IMmBg0ljhB.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\IMmBg0ljhB.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2716-3-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2716-5-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2716-24-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3172-2-0x0000000000401000-0x0000000000410000-memory.dmp

Filesize
60KB

Download
memory/3172-6-0x0000000000401000-0x0000000000410000-memory.dmp

Filesize
60KB

Download
memory/3448-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3448-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3448-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3448-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3448-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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