isrstealer | c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5

General

Target

c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe
Size

416KB
MD5

91d937710ac52d2fa0627f84ce7487fe
SHA1

65be2041f7bc9463fb9d58f79b7fc053131993e1
SHA256

c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5
SHA512

22c1c7a29f14f7aac74b11a68377e78aced2881fa7bd0f0b20146c7189a0773234bbd2b7f9cabbe26e902be180b5a2d82a825e01c2805c185a84b507aad84e55
SSDEEP

6144:mtPQbyqd55JA4mCpAYFTU2Leeo50VTlOLyk5CL//X6sdM7CzhF1pBocNHIf7CKjN:7L55qCp7U/ORil52fu0F1jrNs7CNuy

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 2 IoCs

resource	yara_rule
behavioral2/memory/4664-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4664-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3480-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3480-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/3480-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3480-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1728-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1728-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1728-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1728-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3480-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3480-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3480-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3480-153-0x0000000000400000-0x000000000041F000-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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3008 set thread context of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 4664 set thread context of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 set thread context of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 3008 wrote to memory of 4664	3008	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	86
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 1728	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	87
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88
PID 4664 wrote to memory of 3480	4664	c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe	88

C:\Users\Admin\AppData\Local\Temp\c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe
"C:\Users\Admin\AppData\Local\Temp\c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Users\Admin\AppData\Local\Temp\c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe
  C:\Users\Admin\AppData\Local\Temp\c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4664
- - C:\Users\Admin\AppData\Local\Temp\c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\a5s5NlyZpr.ini"
    3⤵
    PID:1728
- - C:\Users\Admin\AppData\Local\Temp\c7fad60729d13b4d7635a4a03c05e8ba348db293accf8605454a703ea64543d5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\iy0RjT9Hb0.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3480

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\a5s5NlyZpr.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1728-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1728-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1728-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1728-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3008-133-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/3008-132-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/3008-139-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/3480-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3480-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3480-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3480-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4664-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4664-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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