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 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/952-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/952-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/952-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/952-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/952-76-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/952-84-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/1020-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1020-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1020-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1020-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1500-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1500-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1500-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1500-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1500-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1020-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-83-0x0000000000400000-0x000000000041F000-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-1-5-21-575491160-2295418218-1540667289-1000\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 1708 set thread context of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 set thread context of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 set thread context of 1020	952	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
1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

pid	process
1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

pid process

952 2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

pid	process
952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Suspicious use of WriteProcessMemory 25 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:1708

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:952

C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\kfso3374SY.ini"
3⤵
PID:1500

C:\Users\Admin\AppData\Local\Temp\2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\dgXv578gPW.ini"
3⤵
- Accesses Microsoft Outlook accounts
PID:1020

Network

MITRE ATT&CK Matrix ATT&CK 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

1

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kfso3374SY.ini
Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/952-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/952-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/952-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/952-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/952-61-0x0000000000401180-mapping.dmp

Download
memory/952-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/952-84-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/952-76-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1020-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1020-78-0x000000000041C410-mapping.dmp

Download
memory/1020-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1020-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1020-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1500-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1500-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1500-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1500-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1500-66-0x00000000004512E0-mapping.dmp

Download
memory/1500-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1708-54-0x0000000075651000-0x0000000075653000-memory.dmp

Filesize
8KB

Download

description	pid	process	target process
PID 1708 wrote to memory of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1708 wrote to memory of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1708 wrote to memory of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1708 wrote to memory of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1708 wrote to memory of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1708 wrote to memory of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 1708 wrote to memory of 952	1708	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1500	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe
PID 952 wrote to memory of 1020	952	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe	2b71895667e9dc9fe1d91431e6e4b9f1477d323cc4fe07576aa4529c0e86a6bf.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads