isrstealer | 2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf

General

Target

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
Size

1.1MB
MD5

df840378b0b0bb4beb391ab2d45aa352
SHA1

b867297fda19144949a9e4333f6a8d8cf7aa81de
SHA256

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf
SHA512

dce14357f0d2a6b5661f5a2b1f5a5d2184c9585ba650576906864e9725625377cdc64acd077ec22e559c26dae042cfdacb0ee296e4a0c36cd432d97db9fdf443
SSDEEP

24576:8RmJkqoQrilOIQ+yMxGaCVi0SQOb/yIwhCtS:tJXoQryTiMxGaCoOOb/yhQS

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

Processes:

resource	yara_rule
behavioral2/memory/1244-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1244-143-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1244-151-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1244-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/1600-149-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1600-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1600-149-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1600-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2260-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2260-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2260-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2260-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1600-146-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1600-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1600-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1600-150-0x0000000000400000-0x000000000041F000-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

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

description	pid	process	target process
PID 4988 set thread context of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 set thread context of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 set thread context of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

pid	process
4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

pid	process
4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

pid process

1244 2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

pid	process
1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
"C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4988

C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
"C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1244

C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\T7hoblxqSe.ini"
3⤵
PID:2260

C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\IzfLNWxz2u.ini"
3⤵
- Accesses Microsoft Outlook accounts
PID:1600

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\T7hoblxqSe.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1244-143-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1244-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1244-152-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1244-151-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1244-132-0x0000000000000000-mapping.dmp

Download
memory/1600-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1600-145-0x0000000000000000-mapping.dmp

Download
memory/1600-146-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1600-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1600-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2260-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2260-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2260-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2260-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2260-137-0x0000000000000000-mapping.dmp

Download

description	pid	process	target process
PID 4988 wrote to memory of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 4988 wrote to memory of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 4988 wrote to memory of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 4988 wrote to memory of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 4988 wrote to memory of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 4988 wrote to memory of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 4988 wrote to memory of 1244	4988	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 2260	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1244 wrote to memory of 1600	1244	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads