isrstealer | 05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0

Analysis

max time kernel
289s
max time network
332s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 00:28

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General

Target

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe
Size

311KB
MD5

903e424e8012d31fd6bfde2b6715a620
SHA1

ebd025a6d84e561ba262f8ce987cf16819785f7b
SHA256

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0
SHA512

bbd3406886b8685ebcba82aa0f571d21e8a359986a149e27979bee60aed7f9252dd7360d5db58ee899b3215fdb5c3e737f265a5582d8683bdf245dd188d76e45
SSDEEP

6144:nlGAxVnth2DTlanWgvj9TyaXnckaREqjf:MYVnT/WSpyacFCSf

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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1364-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1364-142-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

UPX packed file 1 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2512-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

Processes:

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exevbc.exe

description	pid	process	target process
PID 4884 set thread context of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1364 set thread context of 2512	1364	vbc.exe	vbc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe

description pid process

Token: SeDebugPrivilege 4884 05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1364 vbc.exe

description	pid	process
Token: SeDebugPrivilege	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe

pid	process
1364	vbc.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exevbc.exe

description	pid	process	target process
PID 4884 wrote to memory of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 4884 wrote to memory of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 4884 wrote to memory of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 4884 wrote to memory of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 4884 wrote to memory of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 4884 wrote to memory of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 4884 wrote to memory of 1364	4884	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe
PID 1364 wrote to memory of 2512	1364	vbc.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe
"C:\Users\Admin\AppData\Local\Temp\05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4884

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:1364

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\cpCQQQa2Uf.ini"
3⤵
PID:2512

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1364-134-0x0000000000000000-mapping.dmp

Download
memory/1364-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1364-142-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2512-140-0x0000000000000000-mapping.dmp

Download
memory/2512-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4884-132-0x00000000749A0000-0x0000000074F51000-memory.dmp

Filesize
5.7MB

Download
memory/4884-133-0x00000000749A0000-0x0000000074F51000-memory.dmp

Filesize
5.7MB

Download
memory/4884-139-0x00000000749A0000-0x0000000074F51000-memory.dmp

Filesize
5.7MB

Download