isrstealer | 5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e

General

Target

5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe
Size

532KB
MD5

56bb49942ccb534ced071950c45e94a6
SHA1

9822aae531ab7a468095f1e08a36f06f8a69a9ed
SHA256

5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e
SHA512

12eea2ddaa45d7dc8fc95eb8291eae4cc18c9b9593d1f780dfc4811fb1659c33915b781a4d5aa50830c1aaea50bca5e7c8d441f9c8b4ab77a1a51debb53bf0e3
SSDEEP

12288:F7R5yDA3Ivt2i1KKOIdu3EhbjMU/UebEA1pI68B:F7qDAYvJE1IdvsU/TR1px

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/1156-59-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1156-62-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1156-64-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1156-79-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1156-81-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

pid	Process
1156	notepad .exe
536	notepad .exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/536-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/536-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/536-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/536-80-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/536-82-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe
1156	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 1392 set thread context of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1156 set thread context of 536	1156	notepad .exe	29

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1156	notepad .exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1392 wrote to memory of 1156	1392	5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe	28
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29
PID 1156 wrote to memory of 536	1156	notepad .exe	29

C:\Users\Admin\AppData\Local\Temp\5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe
"C:\Users\Admin\AppData\Local\Temp\5e28a45b4d729a306027961c809f3d2327aa39d39c23792609d56d156b95013e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1392
- 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:1156
- - C:\Users\Admin\AppData\Local\Temp\notepad .exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\08taHpT67G.ini"
    3⤵
    - Executes dropped EXE
    PID:536

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\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/536-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/536-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/536-82-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/536-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/536-80-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1156-59-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1156-79-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1156-57-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1156-56-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1156-81-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1156-62-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1392-61-0x0000000074620000-0x0000000074BCB000-memory.dmp

Filesize
5.7MB

Download
memory/1392-67-0x0000000074620000-0x0000000074BCB000-memory.dmp

Filesize
5.7MB

Download
memory/1392-63-0x0000000074620000-0x0000000074BCB000-memory.dmp

Filesize
5.7MB

Download
memory/1392-54-0x0000000075BE1000-0x0000000075BE3000-memory.dmp

Filesize
8KB

Download

Analysis

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