isrstealer | 754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01

General

Target

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
Size

489KB
MD5

bb3ea4653a2b06e8f465458d29c9d061
SHA1

fa24fc3cd1b31c6c79464c1792b14f26a538caf4
SHA256

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01
SHA512

a971fa40f88213a94b1fe76e9801eb1260b0ea8c851278fd17ac0da826458fd0c5831f2c1c57cd130c05ea0066fe3f280c68ae86b2e73397f2fe81014500a85d
SSDEEP

12288:4g5oRaLmsv9msfQmBMBZRsNdxVsNy6FpE00PLzId:hPL9v9msfQtRsNONy6PB0

Score

10^/10

isrstealer 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
behavioral1/memory/1544-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1544-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1544-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1544-69-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/912-80-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/912-89-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1544-101-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/1944-100-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1944-100-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1628-85-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1628-91-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1628-92-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1628-93-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1944-95-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1944-99-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1944-100-0x0000000000400000-0x000000000041F000-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

Suspicious use of SetThreadContext 6 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exetakshost.exe

description	pid	process	target process
PID 2024 set thread context of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 set thread context of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 584 set thread context of 912	584	takshost.exe	takshost.exe
PID 912 set thread context of 1628	912	takshost.exe	takshost.exe
PID 1544 set thread context of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 912 set thread context of 1944	912	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 2 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exe

pid process

2024 754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
584 takshost.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe

pid process

2024 754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe

pid	process
2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
584	takshost.exe

pid	process
2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exe

description	pid	process
Token: SeDebugPrivilege	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
Token: SeDebugPrivilege	584	takshost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exe

pid process

1544 754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
912 takshost.exe

pid	process
1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
912	takshost.exe

Suspicious use of WriteProcessMemory 48 IoCs

Processes:

754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exetakshost.exetakshost.exe

description	pid	process	target process
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 1544	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 2024 wrote to memory of 584	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	takshost.exe
PID 2024 wrote to memory of 584	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	takshost.exe
PID 2024 wrote to memory of 584	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	takshost.exe
PID 2024 wrote to memory of 584	2024	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 584 wrote to memory of 912	584	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1628	912	takshost.exe	takshost.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 1544 wrote to memory of 0	1544	754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe
PID 912 wrote to memory of 1944	912	takshost.exe	takshost.exe

C:\Users\Admin\AppData\Local\Temp\754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe
"C:\Users\Admin\AppData\Local\Temp\754715c6f455e7a25598cec24d8c38f09f0685d2e9628138f272d7bdeaec5d01.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2024

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:1544

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:584

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:912

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\tG5ByJNLey.ini"
4⤵
PID:1628

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\takshost.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\rIqVjyEQ6i.ini"
4⤵
PID:1944

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

Exfiltration

Command and Control

Impact

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Downloads

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

Filesize
332KB

Download
memory/584-88-0x0000000074D80000-0x000000007532B000-memory.dmp

Filesize
5.7MB

Download
memory/584-72-0x0000000074D80000-0x000000007532B000-memory.dmp

Filesize
5.7MB

Download
memory/584-70-0x0000000000000000-mapping.dmp

Download
memory/912-80-0x0000000000401180-mapping.dmp

Download
memory/912-89-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1544-63-0x0000000000401180-mapping.dmp

Download
memory/1544-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1544-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1544-69-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1544-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1544-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1544-101-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1628-91-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1628-85-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1628-86-0x00000000004512E0-mapping.dmp

Download
memory/1628-92-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1628-93-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1944-95-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1944-96-0x000000000041C410-mapping.dmp

Download
memory/1944-99-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1944-100-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2024-73-0x0000000074D80000-0x000000007532B000-memory.dmp

Filesize
5.7MB

Download
memory/2024-56-0x0000000074D80000-0x000000007532B000-memory.dmp

Filesize
5.7MB

Download
memory/2024-54-0x0000000075F81000-0x0000000075F83000-memory.dmp

Filesize
8KB

Download
memory/2024-55-0x0000000074D80000-0x000000007532B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads