isrstealer | 505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d

Analysis

max time kernel
37s
max time network
42s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
21-10-2022 19:19

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General

Target

505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
Size

2.0MB
MD5

5ad2eac3004666af59bf963bc4e9e35b
SHA1

dc430a94ef5d682097883844b3d2ee6cad351cfa
SHA256

505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d
SHA512

308a9ed760b55edf85b3e95bd639727208c3cb4a94ee9d2e00514cce2a4b025bf6e6b5ab670236ed8baa533dac29a4a8b6366b3c867f9f86329de7467edf75c2
SSDEEP

49152:FSVaY9utNzMKYX8qeYyyoC0Rrwyv5D9IPYkgKeG6m5:FS8YkzV/qeYNoCoIPYkgs

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/2036-59-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer
behavioral1/memory/2036-61-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer
behavioral1/memory/2036-62-0x0000000000401204-mapping.dmp	family_isrstealer
behavioral1/memory/2036-91-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer
behavioral1/memory/2036-114-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer
behavioral1/memory/2036-115-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer

NirSoft MailPassView 16 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2036-61-0x0000000000400000-0x000000000047B000-memory.dmp	MailPassView
behavioral1/memory/2036-62-0x0000000000401204-mapping.dmp	MailPassView
behavioral1/memory/948-76-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral1/memory/948-77-0x0000000000408E48-mapping.dmp	MailPassView
behavioral1/memory/948-78-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral1/memory/948-79-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral1/memory/2036-91-0x0000000000400000-0x000000000047B000-memory.dmp	MailPassView
behavioral1/memory/1680-96-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/948-95-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral1/memory/1680-100-0x0000000000411654-mapping.dmp	MailPassView
behavioral1/memory/948-104-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral1/memory/1680-107-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/1680-110-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/1680-113-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/2036-114-0x0000000000400000-0x000000000047B000-memory.dmp	MailPassView
behavioral1/memory/2036-115-0x0000000000400000-0x000000000047B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 5 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1792-82-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1792-83-0x000000000043F420-mapping.dmp	WebBrowserPassView
behavioral1/memory/1792-89-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1792-109-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1792-112-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 24 IoCs

resource	yara_rule
behavioral1/memory/2036-61-0x0000000000400000-0x000000000047B000-memory.dmp	Nirsoft
behavioral1/memory/2036-62-0x0000000000401204-mapping.dmp	Nirsoft
behavioral1/memory/948-76-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral1/memory/948-77-0x0000000000408E48-mapping.dmp	Nirsoft
behavioral1/memory/948-78-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral1/memory/948-79-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral1/memory/1792-82-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1792-83-0x000000000043F420-mapping.dmp	Nirsoft
behavioral1/memory/2036-91-0x0000000000400000-0x000000000047B000-memory.dmp	Nirsoft
behavioral1/memory/916-90-0x0000000000423BC0-mapping.dmp	Nirsoft
behavioral1/memory/1792-89-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1680-96-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/948-95-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral1/memory/1680-100-0x0000000000411654-mapping.dmp	Nirsoft
behavioral1/memory/916-103-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/948-104-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral1/memory/1680-107-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/916-108-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/1792-109-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1680-110-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/1792-112-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1680-113-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/2036-114-0x0000000000400000-0x000000000047B000-memory.dmp	Nirsoft
behavioral1/memory/2036-115-0x0000000000400000-0x000000000047B000-memory.dmp	Nirsoft

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1988-55-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/1988-64-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/916-88-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/916-99-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/916-102-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/916-103-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/916-108-0x0000000000400000-0x0000000000426000-memory.dmp	upx

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/1988-55-0x0000000000400000-0x00000000004E5000-memory.dmp	autoit_exe
behavioral1/memory/1988-64-0x0000000000400000-0x00000000004E5000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 1988 set thread context of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 2036 set thread context of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 948 set thread context of 1792	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	28
PID 948 set thread context of 916	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	29
PID 948 set thread context of 1680	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	30

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 AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	916	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 1988 wrote to memory of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 1988 wrote to memory of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 1988 wrote to memory of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 1988 wrote to memory of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 1988 wrote to memory of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 1988 wrote to memory of 2036	1988	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	26
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 2036 wrote to memory of 948	2036	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	27
PID 948 wrote to memory of 1792	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	28
PID 948 wrote to memory of 1792	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	28
PID 948 wrote to memory of 1792	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	28
PID 948 wrote to memory of 1792	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	28
PID 948 wrote to memory of 1792	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	28
PID 948 wrote to memory of 1792	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	28
PID 948 wrote to memory of 916	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	29
PID 948 wrote to memory of 916	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	29
PID 948 wrote to memory of 916	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	29
PID 948 wrote to memory of 916	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	29
PID 948 wrote to memory of 916	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	29
PID 948 wrote to memory of 916	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	29
PID 948 wrote to memory of 1680	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	30
PID 948 wrote to memory of 1680	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	30
PID 948 wrote to memory of 1680	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	30
PID 948 wrote to memory of 1680	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	30
PID 948 wrote to memory of 1680	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	30
PID 948 wrote to memory of 1680	948	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	30

C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
"C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
  "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
    "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:948
  - - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
      "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:1792
  - - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
      "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:916
  - - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
      "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      PID:1680

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/916-99-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/916-108-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/916-85-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/916-103-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/916-102-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/916-88-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/948-72-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-74-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-68-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-71-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-70-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-67-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-73-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-104-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-76-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-95-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-79-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-78-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/948-98-0x0000000002140000-0x0000000002225000-memory.dmp

Filesize
916KB

Download
memory/1680-113-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1680-107-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1680-110-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1680-92-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1680-96-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1792-89-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1792-80-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1792-112-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1792-109-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1792-82-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1988-54-0x0000000075911000-0x0000000075913000-memory.dmp

Filesize
8KB

Download
memory/1988-64-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/1988-55-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2036-61-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2036-59-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2036-57-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2036-114-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2036-56-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2036-93-0x00000000008F0000-0x00000000009D5000-memory.dmp

Filesize
916KB

Download
memory/2036-91-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2036-115-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download