isrstealer | ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8

Analysis

max time kernel
125s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
28/11/2022, 18:24

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General

Target

ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe
Size

404KB
MD5

ead7a0983267d4463c0b086a37dede9a
SHA1

633ce2e4b6232f426c78f0a2420d1433a5368c2a
SHA256

ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8
SHA512

2c326a5e9c53c5741904a471b8ef840bc3fb5bd2b334a875c8d491ad9472979254679e4eb8504cd74d1d94182e303c0024bcbda8f2a33f17f08a2526a6208b51
SSDEEP

6144:soiOGZ+YQh+zVZXbkBR23KtQZlq0f5srHyjwhz573pMV9UibW+c4:+e+zLqRr2ZMNowb73pMV97

Score

10^/10

isrstealer collection persistence 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 4 IoCs

resource	yara_rule
behavioral2/memory/1492-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1492-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1492-148-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1492-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2652-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2652-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/2652-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2652-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4692-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4692-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4692-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4692-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4692-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2652-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2652-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2652-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2652-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\BSILlzCwX = "\"C:\\Users\\Admin\\AppData\\Roaming\\BSILlzCwX\\BSILlzCwX.exe\""	RegSvcs.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4612 set thread context of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 1492 set thread context of 4692	1492	RegSvcs.exe	81
PID 1492 set thread context of 2652	1492	RegSvcs.exe	82
PID 4612 set thread context of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1492	RegSvcs.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 4612 wrote to memory of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 4612 wrote to memory of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 4612 wrote to memory of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 4612 wrote to memory of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 4612 wrote to memory of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 4612 wrote to memory of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 4612 wrote to memory of 1492	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	80
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 4692	1492	RegSvcs.exe	81
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 1492 wrote to memory of 2652	1492	RegSvcs.exe	82
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89
PID 4612 wrote to memory of 3752	4612	ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe	89

C:\Users\Admin\AppData\Local\Temp\ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe
"C:\Users\Admin\AppData\Local\Temp\ce1bbfd0bc2533735a974613ac9a724426a46911cd254c42a99b0c9efce5b9b8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4612
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\b9NbqB9m1s.ini"
    3⤵
    PID:4692
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\1soSKk746n.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2652
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe" /BSILlzCwX /C:\Users\Admin\AppData\Roaming\BSILlzCwX\BSILlzCwX.exe
  2⤵
  - Adds Run key to start application
  PID:3752

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\b9NbqB9m1s.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1492-155-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1492-148-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1492-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1492-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2652-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2652-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2652-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2652-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3752-157-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3752-160-0x0000000075470000-0x0000000075A21000-memory.dmp

Filesize
5.7MB

Download
memory/3752-159-0x0000000075470000-0x0000000075A21000-memory.dmp

Filesize
5.7MB

Download
memory/3752-158-0x0000000075470000-0x0000000075A21000-memory.dmp

Filesize
5.7MB

Download
memory/4612-132-0x0000000075470000-0x0000000075A21000-memory.dmp

Filesize
5.7MB

Download
memory/4612-133-0x0000000075470000-0x0000000075A21000-memory.dmp

Filesize
5.7MB

Download
memory/4612-161-0x0000000075470000-0x0000000075A21000-memory.dmp

Filesize
5.7MB

Download
memory/4692-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4692-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4692-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4692-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4692-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download