isrstealer | bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a

General

Target

bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe
Size

562KB
MD5

d871fa1f2eda016986362b5d3d55ad53
SHA1

d66d8e4b3f77589668471835cfe251aa5b1bf544
SHA256

bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a
SHA512

eeee76a71022eca49046017689c7d02e5f62bfe6dcb75005797d2e8d1c891b812732c71e66564e6a47ed70d7a5ec9db95d55ddb3011a3725a03723aac5e4be33
SSDEEP

12288:K7fi9Y9z8k0GdekXhMfugzCpx7WPqD1041uBs4ivdsjTq:K7eY9zYCeWhMfzOpxaPk04bB

Score

10^/10

isrstealer 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 5 IoCs

resource	yara_rule
behavioral1/memory/1932-59-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1932-62-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1932-64-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1932-79-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1932-84-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

pid	Process
1932	notepad .exe
544	notepad .exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/544-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-80-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-81-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe
1932	notepad .exe

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1376 set thread context of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1932 set thread context of 544	1932	notepad .exe	27

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1932	notepad .exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1376 wrote to memory of 1932	1376	bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe	26
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27
PID 1932 wrote to memory of 544	1932	notepad .exe	27

C:\Users\Admin\AppData\Local\Temp\bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe
"C:\Users\Admin\AppData\Local\Temp\bf71870b86adb5d0aa6290073c4a21465cded4e612a08a6b9db30dd1a927fe7a.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Users\Admin\AppData\Local\Temp\notepad .exe
  "C:\Users\Admin\AppData\Local\Temp\notepad .exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1932
- - C:\Users\Admin\AppData\Local\Temp\notepad .exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\esbcbWIpQ2.ini"
    3⤵
    - Executes dropped EXE
    PID:544

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\esbcbWIpQ2.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\notepad .exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
C:\Users\Admin\AppData\Local\Temp\notepad .exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
C:\Users\Admin\AppData\Local\Temp\notepad .exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
\Users\Admin\AppData\Local\Temp\notepad .exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
\Users\Admin\AppData\Local\Temp\notepad .exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
memory/544-81-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-80-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1376-61-0x00000000745B0000-0x0000000074B5B000-memory.dmp

Filesize
5.7MB

Download
memory/1376-68-0x00000000745B0000-0x0000000074B5B000-memory.dmp

Filesize
5.7MB

Download
memory/1376-63-0x00000000745B0000-0x0000000074B5B000-memory.dmp

Filesize
5.7MB

Download
memory/1376-54-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download
memory/1932-62-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1932-79-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1932-59-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1932-57-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1932-56-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1932-84-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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