isrstealer | cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b

Analysis

max time kernel
71s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
01-12-2022 09:30

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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 4 IoCs

resource	yara_rule
behavioral1/memory/672-63-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/672-64-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/672-74-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/672-85-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1032-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1032-84-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1032-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1032-84-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1532-68-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1532-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1532-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1532-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1532-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1032-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1032-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1032-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1032-84-0x0000000000400000-0x000000000041F000-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-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 772 set thread context of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 672 set thread context of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 set thread context of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 772 wrote to memory of 672	772	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	28
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1532	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	29
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30
PID 672 wrote to memory of 1032	672	cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe	30

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:772
- 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:672
- - C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\9Ps5Nk3KXi.ini"
    3⤵
    PID:1532
- - C:\Users\Admin\AppData\Local\Temp\cd8153855d4094d525b6675e7a4a4316ba5e067327e7c4238b37a705d2a02f8b.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\oDeQ2r82Kp.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1032

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\9Ps5Nk3KXi.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/672-74-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/672-85-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/672-63-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/772-62-0x00000000002B0000-0x00000000002C0000-memory.dmp

Filesize
64KB

Download
memory/772-54-0x0000000000220000-0x0000000000230000-memory.dmp

Filesize
64KB

Download
memory/772-58-0x0000000000260000-0x0000000000270000-memory.dmp

Filesize
64KB

Download
memory/772-60-0x0000000000290000-0x00000000002A0000-memory.dmp

Filesize
64KB

Download
memory/772-61-0x00000000002A0000-0x00000000002B0000-memory.dmp

Filesize
64KB

Download
memory/772-57-0x0000000000250000-0x0000000000260000-memory.dmp

Filesize
64KB

Download
memory/772-56-0x0000000000240000-0x0000000000250000-memory.dmp

Filesize
64KB

Download
memory/772-59-0x0000000000280000-0x0000000000290000-memory.dmp

Filesize
64KB

Download
memory/772-55-0x0000000000230000-0x0000000000240000-memory.dmp

Filesize
64KB

Download
memory/1032-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1032-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1032-84-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1032-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1532-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1532-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1532-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1532-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1532-71-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download
memory/1532-68-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download