isrstealer | aec7476b3cc5d23fc8f8652a6255bf652cc03fd985b6de9faa1875103e12bd4d

General

Target

JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe
Size

632KB
MD5

7e290b3489400c6e501962cdbbdcdea9
SHA1

d338e6f06d482d6486a113d4115c90b531c088dd
SHA256

aec7476b3cc5d23fc8f8652a6255bf652cc03fd985b6de9faa1875103e12bd4d
SHA512

70fe2292609d6db16b99a28593e1a2c98af3847fb7d57ef64b6ac4b26572361b7b870a1f3f5316e768b740cd5dbff230e5eda91cb2d0beb87ba13afa69afff4e
SSDEEP

12288:7yt+isUdgcRFOvNs534CqdqZfHSVl3fe:7TVUdgcRYaOSyVNf

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 3 IoCs

resource	yara_rule
behavioral2/memory/4544-8-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4544-12-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4544-28-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Executes dropped EXE 2 IoCs

pid	Process
4544	Service.exe
5440	Service.exe

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 1704 set thread context of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 4544 set thread context of 5440	4544	Service.exe	88

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5440-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5440-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5440-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5440-20-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5440-24-0x0000000000400000-0x0000000000453000-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	Service.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Service.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4544	Service.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 1704 wrote to memory of 4544	1704	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	87
PID 4544 wrote to memory of 5440	4544	Service.exe	88
PID 4544 wrote to memory of 5440	4544	Service.exe	88
PID 4544 wrote to memory of 5440	4544	Service.exe	88
PID 4544 wrote to memory of 5440	4544	Service.exe	88
PID 4544 wrote to memory of 5440	4544	Service.exe	88
PID 4544 wrote to memory of 5440	4544	Service.exe	88
PID 4544 wrote to memory of 5440	4544	Service.exe	88
PID 4544 wrote to memory of 5440	4544	Service.exe	88

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
  C:\Users\Admin\AppData\Local\Temp\\AppLaunch\Service.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4544
- - C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5440

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 Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1704-30-0x0000000074790000-0x0000000074D41000-memory.dmp

Filesize
5.7MB

Download
memory/1704-3-0x0000000074790000-0x0000000074D41000-memory.dmp

Filesize
5.7MB

Download
memory/1704-2-0x0000000074790000-0x0000000074D41000-memory.dmp

Filesize
5.7MB

Download
memory/1704-31-0x0000000001B30000-0x0000000001B40000-memory.dmp

Filesize
64KB

Download
memory/1704-0-0x0000000074792000-0x0000000074793000-memory.dmp

Filesize
4KB

Download
memory/1704-25-0x0000000001B30000-0x0000000001B40000-memory.dmp

Filesize
64KB

Download
memory/1704-29-0x0000000074792000-0x0000000074793000-memory.dmp

Filesize
4KB

Download
memory/1704-1-0x0000000074790000-0x0000000074D41000-memory.dmp

Filesize
5.7MB

Download
memory/4544-8-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4544-12-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4544-28-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/5440-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5440-24-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5440-22-0x0000000000460000-0x0000000000529000-memory.dmp

Filesize
804KB

Download
memory/5440-20-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5440-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5440-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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