isrstealer | 407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb

General

Target

407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
Size

1.1MB
MD5

6edf09906508321bc02ee3dc1611c837
SHA1

2e97064a575aa81a8b21a943ab8cf8b67ee9e462
SHA256

407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb
SHA512

1470e6664b271d69056f20b5dd6b69800730994bdd55c250ca89e1e3b8fe559b2963803cf67ee74446369056494379fbce6352897eaa2e3362df2e1db852c43c
SSDEEP

24576:KaHMv6Corjqny/Q5QfUtsqb/oY+XWRTnMFN5:K1vqjd/Q5QGCXWd2N5

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 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4336-133-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4336-141-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4336-146-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4372-137-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4372-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4372-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4372-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4372-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4372-144-0x0000000000400000-0x0000000000453000-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 1 IoCs

Processes:

407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

description	pid	Process	procid_target
PID 4336 set thread context of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81

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:

407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

pid	Process
4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

pid	Process
4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

pid	Process
4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe

description	pid	Process	procid_target
PID 4772 wrote to memory of 4336	4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	80
PID 4772 wrote to memory of 4336	4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	80
PID 4772 wrote to memory of 4336	4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	80
PID 4772 wrote to memory of 4336	4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	80
PID 4772 wrote to memory of 4336	4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	80
PID 4772 wrote to memory of 4336	4772	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	80
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81
PID 4336 wrote to memory of 4372	4336	407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe	81

C:\Users\Admin\AppData\Local\Temp\407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
"C:\Users\Admin\AppData\Local\Temp\407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe"
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Users\Admin\AppData\Local\Temp\407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
  "C:\Users\Admin\AppData\Local\Temp\407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4336
- - C:\Users\Admin\AppData\Local\Temp\407fbb0e90f9c8796917dfeb4af0ace4a90086b755637b7d39226878828f85bb.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:4372

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

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/4336-132-0x0000000000000000-mapping.dmp

Download
memory/4336-133-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4336-141-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4336-146-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4372-136-0x0000000000000000-mapping.dmp

Download
memory/4372-137-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4372-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4372-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4372-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4372-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4372-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads