isrstealer | 213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d

General

Target

213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe
Size

366KB
MD5

1156c47a63e8ac62828e29bd20e6f180
SHA1

5e980f9a800a87ea77810605015e062c0fbbcae4
SHA256

213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d
SHA512

879a1577c5da1f14060c4f60e57894e8480187ef2d324d613d99c095a84fe91e14079fe5fb3bc36b0d7f223ce7564b4ee7b9c02ae39f076ac81b171567cb3752
SSDEEP

6144:wzlCREOuG5oTWqCPrNeBbVqtDgkmRpf341qMgMbyALQWB3gjrJHPYIwqCo8Le:yoxuZyqCjNeBbMVg1RpfIvg5ALJ3IHPr

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 4 IoCs

resource	yara_rule
behavioral2/memory/3896-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3896-139-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3896-149-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3896-156-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3628-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3628-155-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/3628-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3628-155-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2648-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2648-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2648-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2648-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2648-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3628-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3628-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3628-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3628-155-0x0000000000400000-0x000000000041F000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2604 set thread context of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 3896 set thread context of 2648	3896	vbc.exe	86
PID 3896 set thread context of 3628	3896	vbc.exe	87

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3896	vbc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 2604 wrote to memory of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 2604 wrote to memory of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 2604 wrote to memory of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 2604 wrote to memory of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 2604 wrote to memory of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 2604 wrote to memory of 3896	2604	213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe	85
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 2648	3896	vbc.exe	86
PID 3896 wrote to memory of 3628	3896	vbc.exe	87
PID 3896 wrote to memory of 3628	3896	vbc.exe	87
PID 3896 wrote to memory of 3628	3896	vbc.exe	87
PID 3896 wrote to memory of 3628	3896	vbc.exe	87
PID 3896 wrote to memory of 3628	3896	vbc.exe	87
PID 3896 wrote to memory of 3628	3896	vbc.exe	87
PID 3896 wrote to memory of 3628	3896	vbc.exe	87
PID 3896 wrote to memory of 3628	3896	vbc.exe	87

C:\Users\Admin\AppData\Local\Temp\213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe
"C:\Users\Admin\AppData\Local\Temp\213a5d73da18ed1b60dbf3328c313b06f207385078fea0c616dbd7fdb59e685d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2604
- 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:3896
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\JfsroDP2Aa.ini"
    3⤵
    PID:2648
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\fITirHAwZH.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3628

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\JfsroDP2Aa.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2604-133-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/2604-132-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/2604-138-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/2648-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2648-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2648-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2648-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2648-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3628-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3628-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3628-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3628-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3896-139-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3896-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3896-149-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3896-156-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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