isrstealer | 8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b

General

Target

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
Size

746KB
MD5

b1d63ea494b854963eefc6e0402160d4
SHA1

c2f3eff9fc4e1b315071857095430ef423ae50b9
SHA256

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b
SHA512

33a801ae1ead10565cc26389057046f7a77ecdec0635764fa745ebca0a67a5dd4bdb2bdbebc9ff13ec574c78337616d5923c709e02dad2549560c27133fefc47
SSDEEP

12288:qUF0w0d/26SSYTiOp94stU254YcGBciJd:7F0w0VzK4p2NBcin

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 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/216-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/216-138-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/216-156-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/4884-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4884-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4884-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4884-155-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4884-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4884-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4884-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4884-155-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1920-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1920-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1920-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1920-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4884-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4884-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4884-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4884-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4884-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4884-155-0x0000000000400000-0x000000000041F000-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

Processes:

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

description	pid	process	target process
PID 3164 set thread context of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 set thread context of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 set thread context of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

pid	process
3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

description pid process

Token: SeDebugPrivilege 3164 8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

pid process

216 8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

description	pid	process
Token: SeDebugPrivilege	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

pid	process
216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
"C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3164

C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
"C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe"
2⤵
PID:344

C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
"C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:216

C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\F7fzpvtbOB.ini"
3⤵
PID:1920

C:\Users\Admin\AppData\Local\Temp\8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\OTtX5PGFqm.ini"
3⤵
- Accesses Microsoft Outlook accounts
PID:4884

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\F7fzpvtbOB.ini
Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/216-134-0x0000000000000000-mapping.dmp

Download
memory/216-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/216-156-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/216-138-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/344-133-0x0000000000000000-mapping.dmp

Download
memory/1920-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1920-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1920-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1920-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1920-141-0x0000000000000000-mapping.dmp

Download
memory/3164-132-0x00000000753A0000-0x0000000075951000-memory.dmp

Filesize
5.7MB

Download
memory/3164-137-0x00000000753A0000-0x0000000075951000-memory.dmp

Filesize
5.7MB

Download
memory/4884-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4884-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4884-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4884-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4884-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4884-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4884-148-0x0000000000000000-mapping.dmp

Download

description	pid	process	target process
PID 3164 wrote to memory of 344	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 344	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 344	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 3164 wrote to memory of 216	3164	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 1920	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe
PID 216 wrote to memory of 4884	216	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe	8f558ab354bd916a256772c1a33d983fd0cc90241d6374634d3b32ad6dd01e2b.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads