isrstealer | ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02

Analysis

max time kernel
70s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
12/10/2022, 16:29

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General

Target
ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe
Size 1.2MB
Sample221012-ty8brsbdhm
SHA256 ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02
MD5 638f0a2333f81bb929cfc47b16e4057d
SHA1 5f8d13e6d5647c6380a6e9670d3279cca8de5eae
SHA512 fafbd9aa10c2f26ffabce7fedb70f6f4929d9d017233b015cf9df9ef472cf752f42bda0cf7aebf22291cffafc9315ad6fcf730f6760b1d3c55b6cce9e080f8e5
SSDEEP 24576:1qXdDeWY6yHlb05btx6O4W0uAp7UGpV83NfmNbP2:1QdCJ0M5nTDj2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

isrstealer 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/2996-141-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/2996-142-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/2996-147-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/2996-155-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

pid	Process
2300	11ZXZ.exe
2620	11ZXZe.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3472-149-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3472-151-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3472-152-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3472-153-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2620 set thread context of 2996	2620	11ZXZe.exe	87
PID 2996 set thread context of 3472	2996	vbc.exe	90

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2996	vbc.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 644 wrote to memory of 2300	644	ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe	85
PID 644 wrote to memory of 2300	644	ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe	85
PID 644 wrote to memory of 2620	644	ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe	86
PID 644 wrote to memory of 2620	644	ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe	86
PID 644 wrote to memory of 2620	644	ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe	86
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2620 wrote to memory of 2996	2620	11ZXZe.exe	87
PID 2996 wrote to memory of 3472	2996	vbc.exe	90
PID 2996 wrote to memory of 3472	2996	vbc.exe	90
PID 2996 wrote to memory of 3472	2996	vbc.exe	90
PID 2996 wrote to memory of 3472	2996	vbc.exe	90
PID 2996 wrote to memory of 3472	2996	vbc.exe	90
PID 2996 wrote to memory of 3472	2996	vbc.exe	90
PID 2996 wrote to memory of 3472	2996	vbc.exe	90
PID 2996 wrote to memory of 3472	2996	vbc.exe	90

C:\Users\Admin\AppData\Local\Temp\ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe
"C:\Users\Admin\AppData\Local\Temp\ae042d2e4e5d411e544f4bf00a5c8499f7c224f442f854feb4e61f705b562b02.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:644
- C:\Users\Admin\AppData\Local\Temp\11ZXZ.exe
  C:\Users\Admin\AppData\Local\Temp\11ZXZ.exe
  2⤵
  - Executes dropped EXE
  PID:2300
- C:\Users\Admin\AppData\Local\Temp\11ZXZe.exe
  C:\Users\Admin\AppData\Local\Temp\11ZXZe.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2620
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2996
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
      4⤵
      PID:3472

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

11ZXZ.exe

Path C:\Users\Admin\AppData\Local\Temp\11ZXZ.exe
Size 171KB
SHA256 09c027f0eb268ece684d416c2ac715f96502400fb003ddecec86f11718862a06
MD5 b639641d48989d0f655c5331d3bbd6ab
SHA1 23c814de11091b34304e3982efc5d0e5a9ab00c8
SHA512 05ffbe523ac54f48471ff0131a2cf11be67a11bc4b6c201b7b52f2fac1b19ed75ee12626d53a28e20f364f7003d0ee95586aed60a8a0a1d6f16951ec422f27f9
SSDEEP 3072:EbCaAEAI8bMb38QXk0zg3wesuJfcCJOgexyFpl/jhvIvAIdxBLYp:ELHAy38zagAesuSYOgexwpl9vIIIdU
MD5 SHA1 SHA512 SSDEEP

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11ZXZ.exe

Path C:\Users\Admin\AppData\Local\Temp\11ZXZ.exe
Size 171KB
SHA256 09c027f0eb268ece684d416c2ac715f96502400fb003ddecec86f11718862a06
MD5 b639641d48989d0f655c5331d3bbd6ab
SHA1 23c814de11091b34304e3982efc5d0e5a9ab00c8
SHA512 05ffbe523ac54f48471ff0131a2cf11be67a11bc4b6c201b7b52f2fac1b19ed75ee12626d53a28e20f364f7003d0ee95586aed60a8a0a1d6f16951ec422f27f9
SSDEEP 3072:EbCaAEAI8bMb38QXk0zg3wesuJfcCJOgexyFpl/jhvIvAIdxBLYp:ELHAy38zagAesuSYOgexwpl9vIIIdU
MD5 SHA1 SHA512 SSDEEP

Submit Download

11ZXZe.exe

Path C:\Users\Admin\AppData\Local\Temp\11ZXZe.exe
Size 544KB
SHA256 b0367f47cf1177e8122dabc5fc85adc4cb03268f7f29176bd15747211ef31b5c
MD5 047eb567d1450e7c0dc4225280062f92
SHA1 1d91f788269eb3560efe85e923720c5b150f89e5
SHA512 0da335c4d3402da4e61cfbf6d009fd55179a8b2bb473ce862ffc53080069a5a193557e098cdb22ab0c8292a57f92b7fba57cc6f8f47eb491c4b322229765fbbf
SSDEEP 12288:O2cc/vSG6T09P88cu2tnYQ9X5Fh4h131Tb1yuY8cgm/:Om9t6m0
MD5 SHA1 SHA512 SSDEEP

Submit Download

11ZXZe.exe

Path C:\Users\Admin\AppData\Local\Temp\11ZXZe.exe
Size 544KB
SHA256 b0367f47cf1177e8122dabc5fc85adc4cb03268f7f29176bd15747211ef31b5c
MD5 047eb567d1450e7c0dc4225280062f92
SHA1 1d91f788269eb3560efe85e923720c5b150f89e5
SHA512 0da335c4d3402da4e61cfbf6d009fd55179a8b2bb473ce862ffc53080069a5a193557e098cdb22ab0c8292a57f92b7fba57cc6f8f47eb491c4b322229765fbbf
SSDEEP 12288:O2cc/vSG6T09P88cu2tnYQ9X5Fh4h131Tb1yuY8cgm/:Om9t6m0
MD5 SHA1 SHA512 SSDEEP

Submit Download

tmp.ini

Path C:\Users\Admin\AppData\Local\Temp\tmp.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

Submit Download

memory/644-132-0x00007FF98E010000-0x00007FF98EA46000-memory.dmp

Download

memory/2300-136-0x00007FF98E010000-0x00007FF98EA46000-memory.dmp

Download

memory/2620-144-0x00000000752A0000-0x0000000075851000-memory.dmp

Download

memory/2620-140-0x00000000752A0000-0x0000000075851000-memory.dmp

Download

memory/2996-142-0x0000000000400000-0x0000000000432000-memory.dmp

Download

memory/2996-147-0x0000000000400000-0x0000000000432000-memory.dmp

Download

memory/2996-155-0x0000000000400000-0x0000000000432000-memory.dmp

Download

memory/3472-149-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/3472-151-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/3472-152-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/3472-153-0x0000000000400000-0x0000000000453000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads