isrstealer | 27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678

Analysis

max time kernel
78s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19-09-2022 09:20

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General

Target

27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
Size

486KB
MD5

30142a9e73f7c52cb7bdb4a492347a0f
SHA1

7714e9951f951d8d4ae03a2aa1a8f08dda35a676
SHA256

27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678
SHA512

527066b47df7e63554c473d70dd95fdbce229b8d188606419a5db4a8b84c2fedca91b35759ea34903824f2208cc602ac0846a1a69e6a30e81397c7ae24454394
SSDEEP

12288:3PkDRWG6toBTP3SS26QOmezhdbczR2QTAciryrEFb7TX4:7G6to13SH6Qczhdg9f+0EFbXI

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 3 IoCs

resource	yara_rule
behavioral2/memory/4964-133-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4964-156-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4964-163-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4608-155-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4608-159-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2628-142-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/2628-146-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/2628-160-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 9 IoCs

resource	yara_rule
behavioral2/memory/2628-142-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/2628-146-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4608-155-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1380-153-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/1380-157-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/1380-158-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4608-159-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2628-160-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/1380-161-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1380-145-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4608-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1380-150-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4608-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1380-153-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4608-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1380-157-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/1380-158-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4608-159-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1380-161-0x0000000000400000-0x0000000000426000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 4932 set thread context of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4964 set thread context of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4696 set thread context of 2628	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	80
PID 4696 set thread context of 1380	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	81
PID 4696 set thread context of 4608	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	82

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1380	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
1380	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1380	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4932 wrote to memory of 4964	4932	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	78
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4964 wrote to memory of 4696	4964	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	79
PID 4696 wrote to memory of 2628	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	80
PID 4696 wrote to memory of 2628	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	80
PID 4696 wrote to memory of 2628	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	80
PID 4696 wrote to memory of 2628	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	80
PID 4696 wrote to memory of 2628	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	80
PID 4696 wrote to memory of 1380	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	81
PID 4696 wrote to memory of 1380	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	81
PID 4696 wrote to memory of 1380	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	81
PID 4696 wrote to memory of 1380	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	81
PID 4696 wrote to memory of 1380	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	81
PID 4696 wrote to memory of 4608	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	82
PID 4696 wrote to memory of 4608	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	82
PID 4696 wrote to memory of 4608	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	82
PID 4696 wrote to memory of 4608	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	82
PID 4696 wrote to memory of 4608	4696	27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe	82

C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
"C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
  "C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4964
- - C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
    "C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4696
  - - C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
      "C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:2628
  - - C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
      "C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1380
  - - C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe
      "C:\Users\Admin\AppData\Local\Temp\27f122cbad61ec92dce9451d3b62b97d648d7f7d4ee5d3c763652602f2215678.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      PID:4608

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\data.dmp

Filesize
54B

MD5
c10dbeca73f8835240e08e4511284b83

SHA1
0032f8f941cc07768189ca6ba32b1beede6b6917

SHA256
0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e

SHA512
34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967

Download Submit
memory/1380-150-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1380-161-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1380-158-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1380-157-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1380-145-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1380-153-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2628-160-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2628-142-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2628-146-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4608-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4608-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4608-159-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4608-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4696-140-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4696-139-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4696-154-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4696-138-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4964-156-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4964-133-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4964-163-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download