isrstealer | 43d9889edc690d01f44f1f3cf5357311d4e0336c12f486f0aeb993e8aa49f032

General

Target

JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe
Size

372KB
MD5

649d5d670230a26cbf5182f6da9f94c3
SHA1

7323a75ecd52b053c8aec76aa1098d1825a0572b
SHA256

43d9889edc690d01f44f1f3cf5357311d4e0336c12f486f0aeb993e8aa49f032
SHA512

b2ff31006c7cb48e42efff97da5e46e9cf6573b3232ba51555659f396a71f94364b636d31f3d1344e22491814517d93c9454c8abc98a4a17cb5220b41a875047
SSDEEP

6144:hxEGgCLi6Ji0wV8w+LOGemcCMicZ6Oyk6yoJrqjitc0B9uSW01CK47CCxI22U63B:D5Wgj9LW01CDCuI2PTh0gg

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/2088-2-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2088-4-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2088-16-0x0000000000400000-0x0000000000435000-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 4448 set thread context of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 2088 set thread context of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5084-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5084-13-0x0000000000400000-0x0000000000453000-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_649d5d670230a26cbf5182f6da9f94c3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe
2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 4448 wrote to memory of 2088	4448	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	86
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87
PID 2088 wrote to memory of 5084	2088	JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe	87

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4448
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2088
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_649d5d670230a26cbf5182f6da9f94c3.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\umkWuaGWak.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5084

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\umkWuaGWak.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2088-2-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2088-4-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2088-16-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/5084-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5084-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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