isrstealer | 4af5ee46602b3eef593e9562384ccd56e029a3a374f78b37deb069bb435f39f5

General

Target

cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe
Size

5.0MB
MD5

cdb48abdb2c5e70a3f5fc48c0db0275e
SHA1

6a0bf23984f9e6f134ba4b1abf9e102ef2c48532
SHA256

4af5ee46602b3eef593e9562384ccd56e029a3a374f78b37deb069bb435f39f5
SHA512

93d22dc893c01591552fe000f7cb648c98de36ded911c5bd1d8da4e77b48474a26db4be4a825be75fdb2833c4320c9cca764cb12d5bfa342c1a6fdfaacd13c7c
SSDEEP

6144:7/m9kF4LhB959Ak24Fa8yVRasuSuvfQ1dskAsaJraBCDorAB:bfFWB9bpFatVMPfgsVpraB

Score

10^/10

isrstealer credential_access 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 4 IoCs

resource	yara_rule
behavioral2/memory/2908-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2908-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2908-20-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2908-24-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2568-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2568-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2568-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2568-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2568-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2988 set thread context of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2908 set thread context of 2568	2908	vbc.exe	86

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 5 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	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1132	cmd.exe
4812	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4812	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2908	vbc.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2988 wrote to memory of 2908	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	84
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2908 wrote to memory of 2568	2908	vbc.exe	86
PID 2988 wrote to memory of 1132	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	88
PID 2988 wrote to memory of 1132	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	88
PID 2988 wrote to memory of 1132	2988	cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe	88
PID 1132 wrote to memory of 4812	1132	cmd.exe	90
PID 1132 wrote to memory of 4812	1132	cmd.exe	90
PID 1132 wrote to memory of 4812	1132	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2908
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Ya9xnOOTdq.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2568
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C ping 1.1.1.1 -n 1 -w 1000 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\cdb48abdb2c5e70a3f5fc48c0db0275e_JaffaCakes118.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1132
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Ya9xnOOTdq.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2568-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2568-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2568-14-0x0000000000460000-0x0000000000529000-memory.dmp

Filesize
804KB

Download
memory/2568-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2568-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2568-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2908-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-20-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-24-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2988-2-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/2988-0-0x0000000074682000-0x0000000074683000-memory.dmp

Filesize
4KB

Download
memory/2988-18-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/2988-1-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download

Analysis

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