isrstealer | a371c45b9e43f518eb3f66b1f1134064ca28c618a03aca63ab621888e12a1d08

General

Target

JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
Size

223KB
MD5

c9a28e7a089a43ff800fd32a94e8edc2
SHA1

77a610930174021c7000c06f14e4b1a7bcc275c8
SHA256

a371c45b9e43f518eb3f66b1f1134064ca28c618a03aca63ab621888e12a1d08
SHA512

89d94e4524cd1540e55822ebcbad2a4068f7562060885b4c8cb93b0610be9d61d2d90b3d9ed46dc76780d9cba1c97cb5ded2a7ca2ef77447a859783711fd26bd
SSDEEP

3072:doy9wREmk+EIoHWKTHpklRdHek0FU4+gbcNhHpDsANcniSx7CAEOY43CGgqx8sB9:doyME+EIkHmwFU7RpDsAeIn1G44Q8Rl

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/840-3-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/840-5-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/840-20-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Downloads MZ/PE file 1 IoCs

flow	pid	Process
35	1756	Process not Found

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 4380 set thread context of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 840 set thread context of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3372-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4836	4380	WerFault.exe	89

System Location Discovery: System Language Discovery 1 TTPs 4 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	MicrosoftEdgeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3936	MicrosoftEdgeUpdate.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 4380 wrote to memory of 840	4380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	96
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97
PID 840 wrote to memory of 3372	840	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	97

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4380 -s 460
  2⤵
  - Program crash
  PID:4836
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:840
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4380 -ip 4380
1⤵
PID:4744

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4MTUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE1MzQzMTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1NDcxNzk4NTE5Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:3936

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

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

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\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/840-3-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/840-5-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/840-20-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3372-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3372-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3372-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3372-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3372-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4380-0-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/4380-7-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing