isrstealer | d8ab7a683844737423d19278b867628dbb80b870f9d768efa8fa2f9b04fb352b

Analysis

max time kernel
94s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
19-07-2024 08:03

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General

Target

5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe
Size

369KB
MD5

5b170c7b8d61630f24f4770813de528d
SHA1

4a70f8afc53c5da2a8440d01b3774a0f1b20bd21
SHA256

d8ab7a683844737423d19278b867628dbb80b870f9d768efa8fa2f9b04fb352b
SHA512

0b31422836d3b3c7ad0caec4d91d747f45423920826109a373931feb683811f49b601f0563c19eddcdd9901fa444b7a425a2d5d55b5435cb53f9f78b8337b5a8
SSDEEP

6144:r49nHjl8/Q7agtGCRUNKmHNtSOI0sJ5RPqkZvoIXDDUkHVgxb6dq8/BxjH0H:r4lHF77PRUIGNtyJvouDUkHVg96k6xj

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 3 IoCs

resource	yara_rule
behavioral2/memory/3328-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3328-6-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3328-22-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4620-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4620-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4620-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4620-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4620-9-0x0000000000400000-0x0000000000453000-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 3536 set thread context of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3328 set thread context of 4620	3328	vbc.exe	87

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3328	vbc.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3536 wrote to memory of 3328	3536	5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe	86
PID 3328 wrote to memory of 4620	3328	vbc.exe	87
PID 3328 wrote to memory of 4620	3328	vbc.exe	87
PID 3328 wrote to memory of 4620	3328	vbc.exe	87
PID 3328 wrote to memory of 4620	3328	vbc.exe	87
PID 3328 wrote to memory of 4620	3328	vbc.exe	87
PID 3328 wrote to memory of 4620	3328	vbc.exe	87
PID 3328 wrote to memory of 4620	3328	vbc.exe	87
PID 3328 wrote to memory of 4620	3328	vbc.exe	87

C:\Users\Admin\AppData\Local\Temp\5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5b170c7b8d61630f24f4770813de528d_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3536
- 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:3328
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\liTrOcglL0.ini"
    3⤵
    PID:4620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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\liTrOcglL0.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3328-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3328-6-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3328-22-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3328-21-0x0000000000440000-0x0000000000509000-memory.dmp

Filesize
804KB

Download
memory/3536-1-0x0000000075420000-0x00000000759D1000-memory.dmp

Filesize
5.7MB

Download
memory/3536-2-0x0000000075420000-0x00000000759D1000-memory.dmp

Filesize
5.7MB

Download
memory/3536-17-0x0000000075420000-0x00000000759D1000-memory.dmp

Filesize
5.7MB

Download
memory/3536-0-0x0000000075422000-0x0000000075423000-memory.dmp

Filesize
4KB

Download
memory/4620-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4620-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4620-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4620-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4620-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download