isrstealer | 6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6

General

Target

6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe
Size

652KB
MD5

63bd07721d56106b4e55dbece8d271a0
SHA1

32289183df5eaca3dba4ec79a4f567f3fbcc84c4
SHA256

6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6
SHA512

9ec1e3c12af78ced8b35cd994cd475ababf2daaf2a6fbb5657f3b93b70fb3b9955a601a996d7c7fbfcbbed5d7e96a4edfd54e1fd7d9d47ae86d505a5c73834a0
SSDEEP

12288:Zpm7X01MNN39gsqnyUD9pHZx95hV2Fes9f7Ne9io6gKpGZ3:nJGtgsHwlefpeM3rk3

Score

10^/10

isrstealer collection 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
behavioral1/memory/1540-59-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1540-61-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1540-62-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1540-73-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1540-84-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/920-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/920-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/920-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/920-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1308-67-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1308-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1308-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1308-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1308-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/920-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/920-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/920-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/920-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1612 set thread context of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1540 set thread context of 1308	1540	vbc.exe	28
PID 1540 set thread context of 920	1540	vbc.exe	29

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1540	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1612 wrote to memory of 1540	1612	6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe	27
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 1308	1540	vbc.exe	28
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29
PID 1540 wrote to memory of 920	1540	vbc.exe	29

C:\Users\Admin\AppData\Local\Temp\6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe
"C:\Users\Admin\AppData\Local\Temp\6aed3d5f2b78f7c3c916947b94c884b421cdcb312c33e811c8f0fdf80b064fe6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1540
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Yny8ATaZI2.ini"
    3⤵
    PID:1308
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\RLJJoGiszM.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:920

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Yny8ATaZI2.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/920-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/920-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/920-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/920-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1308-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1308-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1308-67-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1308-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1308-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1540-61-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1540-73-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1540-59-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1540-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1540-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1540-84-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1612-54-0x0000000075201000-0x0000000075203000-memory.dmp

Filesize
8KB

Download
memory/1612-65-0x0000000074740000-0x0000000074CEB000-memory.dmp

Filesize
5.7MB

Download
memory/1612-55-0x0000000074740000-0x0000000074CEB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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