isrstealer | b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd

General

Target

58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
Size

324KB
MD5

58e797d97c447770b6b9d85e70cf9aca
SHA1

ca425a27dd9f7edd66f579c871b3d1ff49efaa73
SHA256

b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd
SHA512

a26820aa51e157da5ee51e54e564f8f4c46c8e5610da3807f2038a2d830d56f36d02e9002cb7dca291dba99fd10b42afc137f7e1e23712ac4336a50c4e403edc
SSDEEP

6144:yoY7yvft3kh+vIjazquDf02UebwfYSD3+AyqvGTX4ULqgqCRqWSc7:yo5vf6PEqC0ObeND3+AyC6GgbKs

Score

10^/10

isrstealer collection 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 4 IoCs

resource	yara_rule
behavioral2/memory/4048-4-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4048-6-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4048-18-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4048-28-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3948-23-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3948-24-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3948-27-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3948-23-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3948-24-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3948-27-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4172 set thread context of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4048 set thread context of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 set thread context of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2540-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2540-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2540-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2540-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2540-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3948-20-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3948-23-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3948-24-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3948-22-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3948-27-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4172 wrote to memory of 4048	4172	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	91
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 2540	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	92
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100
PID 4048 wrote to memory of 3948	4048	58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe	100

C:\Users\Admin\AppData\Local\Temp\58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Users\Admin\AppData\Local\Temp\58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4048
- - C:\Users\Admin\AppData\Local\Temp\58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\bzIQbImyAJ.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2540
- - C:\Users\Admin\AppData\Local\Temp\58e797d97c447770b6b9d85e70cf9aca_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\XBOApJBaT1.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3948

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

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2540-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2540-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2540-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2540-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2540-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3948-20-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3948-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3948-24-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3948-22-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3948-27-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4048-4-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4048-6-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4048-18-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4048-28-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4172-3-0x00000000020E0000-0x00000000020E1000-memory.dmp

Filesize
4KB

Download
memory/4172-2-0x00000000020D0000-0x00000000020D1000-memory.dmp

Filesize
4KB

Download

Analysis

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