isrstealer | 754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01

General

Target

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
Size

489KB
MD5

bb3ea4653a2b06e8f465458d29c9d061
SHA1

fa24fc3cd1b31c6c79464c1792b14f26a538caf4
SHA256

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01
SHA512

a971fa40f88213a94b1fe76e9801eb1260b0ea8c851278fd17ac0da826458fd0c5831f2c1c57cd130c05ea0066fe3f280c68ae86b2e73397f2fe81014500a85d
SSDEEP

12288:4g5oRaLmsv9msfQmBMBZRsNdxVsNy6FpE00PLzId:hPL9v9msfQtRsNONy6PB0

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 7 IoCs

Processes:

resource	yara_rule
behavioral2/memory/224-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/224-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/488-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/224-160-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/224-161-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/488-169-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/488-170-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/1784-167-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1784-168-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1784-167-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1784-168-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4064-151-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4064-153-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4064-157-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4064-158-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4064-159-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1784-164-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1784-166-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1784-167-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1784-168-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe

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:

takshost.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	takshost.exe

Suspicious use of SetThreadContext 6 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exetakshost.exe

description	pid	process	target process
PID 4684 set thread context of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 set thread context of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 3232 set thread context of 488	3232	takshost.exe	takshost.exe
PID 488 set thread context of 4064	488	takshost.exe	takshost.exe
PID 224 set thread context of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 488 set thread context of 1784	488	takshost.exe	takshost.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exe

pid	process
4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
3232	takshost.exe
3232	takshost.exe

Suspicious behavior: RenamesItself 1 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe

pid process

4684 754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exe

description	pid	process
Token: SeDebugPrivilege	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
Token: SeDebugPrivilege	3232	takshost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exe

pid process

224 754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
488 takshost.exe

pid	process
224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
488	takshost.exe

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exetakshost.exe

description	pid	process	target process
PID 4684 wrote to memory of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 4684 wrote to memory of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 4684 wrote to memory of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 4684 wrote to memory of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 4684 wrote to memory of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 4684 wrote to memory of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 4684 wrote to memory of 224	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 4684 wrote to memory of 3232	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	takshost.exe
PID 4684 wrote to memory of 3232	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	takshost.exe
PID 4684 wrote to memory of 3232	4684	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	takshost.exe
PID 3232 wrote to memory of 488	3232	takshost.exe	takshost.exe
PID 3232 wrote to memory of 488	3232	takshost.exe	takshost.exe
PID 3232 wrote to memory of 488	3232	takshost.exe	takshost.exe
PID 3232 wrote to memory of 488	3232	takshost.exe	takshost.exe
PID 3232 wrote to memory of 488	3232	takshost.exe	takshost.exe
PID 3232 wrote to memory of 488	3232	takshost.exe	takshost.exe
PID 3232 wrote to memory of 488	3232	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 4064	488	takshost.exe	takshost.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 224 wrote to memory of 0	224	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe
PID 488 wrote to memory of 1784	488	takshost.exe	takshost.exe

C:\Users\Admin\AppData\Local\Temp\754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
"C:\Users\Admin\AppData\Local\Temp\754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4684

C:\Users\Admin\AppData\Local\Temp\754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
"C:\Users\Admin\AppData\Local\Temp\754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:224

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3232

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:488

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\gvrXmDfOda.ini"
4⤵
PID:4064

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\HGAo4AsjRw.ini"
4⤵
- Accesses Microsoft Outlook accounts
PID:1784

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/0-154-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

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

Filesize
332KB

Download
memory/224-134-0x0000000000000000-mapping.dmp

Download
memory/224-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/224-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/224-161-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/224-160-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/488-155-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/488-144-0x0000000000000000-mapping.dmp

Download
memory/488-170-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/488-169-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1784-168-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1784-167-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1784-166-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1784-164-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1784-163-0x0000000000000000-mapping.dmp

Download
memory/3232-142-0x0000000074AD0000-0x0000000075081000-memory.dmp

Filesize
5.7MB

Download
memory/3232-141-0x0000000000000000-mapping.dmp

Download
memory/3232-156-0x0000000074AD0000-0x0000000075081000-memory.dmp

Filesize
5.7MB

Download
memory/4064-159-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4064-158-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4064-157-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4064-153-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4064-151-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4064-150-0x0000000000000000-mapping.dmp

Download
memory/4684-133-0x0000000074AD0000-0x0000000075081000-memory.dmp

Filesize
5.7MB

Download
memory/4684-132-0x0000000074AD0000-0x0000000075081000-memory.dmp

Filesize
5.7MB

Download
memory/4684-143-0x0000000074AD0000-0x0000000075081000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads