isrstealer | 55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff

Analysis

max time kernel
233s
max time network
250s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2022 10:26

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General

Target

55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe
Size

396KB
MD5

73f6d672ab0cf264f6aba402152afec5
SHA1

07bee1c16140e960c5573cc71a88d1f08c43f0e5
SHA256

55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff
SHA512

2876f7c3f1fe6cc5142898c6a5ef46681714691e321b2634611e573393a487f6b87ae405ea3d50e5380379bf0c85f92a73367b8d22284710070d38df7c08ada9
SSDEEP

12288:ap0jU2afGejIcW/jySiW7M/XyInrNoxr+hgsIGg:wjLeudISoxle

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/2312-135-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2312-134-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/2312-146-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2312-148-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2848-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2848-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2848-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2848-145-0x0000000000400000-0x0000000000453000-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 1480 set thread context of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 2312 set thread context of 2848	2312	vbc.exe	86

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2312	vbc.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 1480 wrote to memory of 2312	1480	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	85
PID 2312 wrote to memory of 2848	2312	vbc.exe	86
PID 2312 wrote to memory of 2848	2312	vbc.exe	86
PID 2312 wrote to memory of 2848	2312	vbc.exe	86
PID 2312 wrote to memory of 2848	2312	vbc.exe	86
PID 2312 wrote to memory of 2848	2312	vbc.exe	86
PID 2312 wrote to memory of 2848	2312	vbc.exe	86
PID 2312 wrote to memory of 2848	2312	vbc.exe	86
PID 2312 wrote to memory of 2848	2312	vbc.exe	86

C:\Users\Admin\AppData\Local\Temp\55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe
"C:\Users\Admin\AppData\Local\Temp\55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1480
- 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:2312
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\XBj5cFwWVH.ini"
    3⤵
    PID:2848

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\XBj5cFwWVH.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1480-133-0x00000000746D0000-0x0000000074C81000-memory.dmp

Filesize
5.7MB

Download
memory/1480-138-0x00000000746D0000-0x0000000074C81000-memory.dmp

Filesize
5.7MB

Download
memory/1480-132-0x00000000746D0000-0x0000000074C81000-memory.dmp

Filesize
5.7MB

Download
memory/2312-146-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2312-135-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2312-148-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2848-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2848-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2848-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2848-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download