isrstealer | 71c2db1378db95d9feeb97631e7f0a359254bfc820b05c501bc79314081909ac

General

Target

NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
Size

432KB
MD5

5127ec261e2980efb02b0fe22f587aa0
SHA1

f4e74c7d45c3ba9edabf58348919f8169ccb3823
SHA256

71c2db1378db95d9feeb97631e7f0a359254bfc820b05c501bc79314081909ac
SHA512

775f3248d3568882e7a82eb304179bfb096dbdabbe44d9eaa19b734a3da6e3f19081ee9af362b8ccb357e2d2d46c3dac171286af6f955b753ce181c7560db477
SSDEEP

6144:fZ7i3/6MwWT8iFhvAcaCoDpUYoYjH2PXN+fj+Sf1AWQoXGQHzjaw2koGNQHmeJ0s:ti3VN/oDLoiWPN+LH2i2w/1YKFmv

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 5 IoCs

resource	yara_rule
behavioral2/memory/1708-1-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1708-3-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1708-15-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1708-25-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1708-26-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2280-22-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2280-23-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/2280-22-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2280-23-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

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
T1552.001

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4232-6-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4232-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4232-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4232-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4232-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2280-18-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2280-20-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2280-22-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2280-23-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3125601242-331447593-1512828465-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1896 set thread context of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1708 set thread context of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 set thread context of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1896 wrote to memory of 1708	1896	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	90
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 4232	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	91
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100
PID 1708 wrote to memory of 2280	1708	NEAS.5127ec261e2980efb02b0fe22f587aa0.exe	100

C:\Users\Admin\AppData\Local\Temp\NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.5127ec261e2980efb02b0fe22f587aa0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1896
- C:\Users\Admin\AppData\Local\Temp\NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
  C:\Users\Admin\AppData\Local\Temp\NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Users\Admin\AppData\Local\Temp\NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\rptFGu4ltj.ini"
    3⤵
    PID:4232
- - C:\Users\Admin\AppData\Local\Temp\NEAS.5127ec261e2980efb02b0fe22f587aa0.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\c4KcgARLdA.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2280

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

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\rptFGu4ltj.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1708-1-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1708-3-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1708-26-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1708-25-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1708-15-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-0-0x0000000002420000-0x0000000002424000-memory.dmp

Filesize
16KB

Download
memory/2280-22-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2280-18-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2280-20-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2280-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4232-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4232-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4232-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4232-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4232-6-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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