isrstealer | 6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4

General

Target

6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
Size

1.1MB
MD5

fd284de48fceb1580a3a4f69e382cdb4
SHA1

dee73f2265bac5427da3920e49a8bf5f1f3e7d93
SHA256

6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4
SHA512

9a87fb545b73ff818d0b45e998a12a8a9e2ed0eb8400e029bbc65c19f48c324050214ae5a55458609a24f4a114e2065b64984eb9ae5c5262f855f508326cdb79
SSDEEP

12288:/aWzgMg7v3qnCiMErQohh0F4CCJ8lny/Qo6oImr69oGE15jSsFZyoopSqM14C:iaHMv6Corjqny/Qo6DcsoRNFZyomW4C

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 4 IoCs

resource	yara_rule
behavioral2/memory/4344-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4344-141-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4344-146-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4344-154-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3568-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3568-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3568-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/3568-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3568-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3568-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5056-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5056-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5056-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5056-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5056-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3568-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3568-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3568-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3568-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3568-153-0x0000000000400000-0x000000000041F000-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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3108 set thread context of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 4344 set thread context of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 set thread context of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89

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

pid	Process
3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 3108 wrote to memory of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 3108 wrote to memory of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 3108 wrote to memory of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 3108 wrote to memory of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 3108 wrote to memory of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 3108 wrote to memory of 4344	3108	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	80
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 5056	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	81
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89
PID 4344 wrote to memory of 3568	4344	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	89

C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
"C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3108
- C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
  "C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4344
- - C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\zptLhSupv0.ini"
    3⤵
    PID:5056
- - C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\McPIzF9KFb.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3568

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

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\zptLhSupv0.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3568-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3568-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3568-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3568-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3568-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4344-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4344-154-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4344-141-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4344-146-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/5056-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5056-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5056-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5056-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5056-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing