isrstealer | 3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2

General

Target

3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe
Size

283KB
MD5

c9b83f9a44345d390c0c9f00ab36879c
SHA1

3d973d3c02d7c35cc26c641404061daf8457f1b1
SHA256

3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2
SHA512

12cd819e85417915a23951de22cb5b03341fb718bbab6fede068c86748be3b9a9f14169df2a8fc91ad1e5d54919f92498b3b2191208febf4a1d7098dc6d17cad
SSDEEP

6144:ZakvLzSGh+s+7gAuC1NDsrfZ+24WwhuQ0o8rri4:Vv3SGhq7gAu0NIr94Kto8PJ

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 6 IoCs

resource	yara_rule
behavioral1/memory/1720-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1720-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1720-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1720-69-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1720-80-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1720-88-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1964-86-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1964-87-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1964-86-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1964-87-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1988-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1988-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1988-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1988-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1988-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1964-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1964-85-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1964-86-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1964-87-0x0000000000400000-0x000000000041F000-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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1724 set thread context of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1720 set thread context of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 set thread context of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1724 wrote to memory of 1720	1724	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	27
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1988	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	28
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31
PID 1720 wrote to memory of 1964	1720	3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe	31

C:\Users\Admin\AppData\Local\Temp\3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe
"C:\Users\Admin\AppData\Local\Temp\3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Users\Admin\AppData\Local\Temp\3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe
  "C:\Users\Admin\AppData\Local\Temp\3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1720
- - C:\Users\Admin\AppData\Local\Temp\3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\lx3C2fatPW.ini"
    3⤵
    PID:1988
- - C:\Users\Admin\AppData\Local\Temp\3bcf1073fbe7b237ad7abd57d3cc919e7a79c456b4ca658d094a6a7c16d3edf2.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\5iFJNttAfd.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1964

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\lx3C2fatPW.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1720-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1720-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1720-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1720-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1720-69-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1720-88-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1720-80-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1724-56-0x00000000742A0000-0x000000007484B000-memory.dmp

Filesize
5.7MB

Download
memory/1724-55-0x00000000742A0000-0x000000007484B000-memory.dmp

Filesize
5.7MB

Download
memory/1724-68-0x00000000742A0000-0x000000007484B000-memory.dmp

Filesize
5.7MB

Download
memory/1724-54-0x0000000074B51000-0x0000000074B53000-memory.dmp

Filesize
8KB

Download
memory/1964-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1964-85-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1964-86-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1964-87-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1988-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1988-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1988-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1988-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1988-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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