isrstealer | cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b

General

Target

cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
Size

312KB
MD5

8edc409455c9eb7067a80d4ae34f0e4d
SHA1

3cd04dc81adba86573b229e6b10b8775f325bd86
SHA256

cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b
SHA512

4fd98dad5aa619ec5cf8095a8f0606e8b383be85c8dc0d15db6a5402ff8a9a284b8438a73f6a20a4e59d198bed86045da696f2ca69475dc8d6689675fd009989
SSDEEP

6144://5EiUy8zxic4uYcSCLdbNsjbrfMYRtQ0jDqLlpg://2iUyGx3JTslQ0jDqLl

Score

10^/10

isrstealer collection 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 5 IoCs

resource	yara_rule
behavioral2/memory/4124-141-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/4124-142-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4124-149-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4124-161-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4124-162-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/240-159-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/240-160-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/240-159-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/240-160-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1516-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1516-150-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1516-151-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1516-152-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1516-153-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/240-156-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/240-158-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/240-159-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/240-160-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3036 set thread context of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 4124 set thread context of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 set thread context of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 3036 wrote to memory of 4124	3036	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	83
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 1516	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	84
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88
PID 4124 wrote to memory of 240	4124	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	88

C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
"C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3036
- C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
  C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4124
- - C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\boPOkdJg3S.ini"
    3⤵
    PID:1516
- - C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\MdF4oIOOiE.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:240

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

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\boPOkdJg3S.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/240-160-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/240-159-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/240-158-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/240-156-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1516-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1516-151-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1516-153-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1516-152-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1516-150-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3036-138-0x00000000020B0000-0x00000000020C0000-memory.dmp

Filesize
64KB

Download
memory/3036-136-0x0000000002090000-0x00000000020A0000-memory.dmp

Filesize
64KB

Download
memory/3036-133-0x00000000005C0000-0x00000000005D0000-memory.dmp

Filesize
64KB

Download
memory/3036-139-0x00000000020D0000-0x00000000020E0000-memory.dmp

Filesize
64KB

Download
memory/3036-137-0x00000000020A0000-0x00000000020B0000-memory.dmp

Filesize
64KB

Download
memory/3036-140-0x00000000020E0000-0x00000000020F0000-memory.dmp

Filesize
64KB

Download
memory/3036-135-0x0000000002080000-0x0000000002090000-memory.dmp

Filesize
64KB

Download
memory/3036-132-0x00000000005B0000-0x00000000005C0000-memory.dmp

Filesize
64KB

Download
memory/3036-134-0x00000000005D0000-0x00000000005E0000-memory.dmp

Filesize
64KB

Download
memory/4124-149-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4124-142-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4124-161-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4124-162-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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