isrstealer | 895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86

General

Target

895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe
Size

299KB
MD5

9fe12a07f9a466f4d53d72927b7c53af
SHA1

7ca770481dc79d99c3e73cd5da59d80cdbe0fe1e
SHA256

895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86
SHA512

5600b13824622ba6a9276b1f5171944743dccba2ae211c00abd6d9866ce39281b91aa86e91c5c7e7e2c5e23ea29d66b57459fd4fc1587387b5dbc850885a890e
SSDEEP

6144:2WFXSHcWqstITifKZwuH8F4W3cDXCqMAZJ76RBmx5LnvyP7yaO1uCfZ:XXtWhtmeqWs7UAZJrya1usZ

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 5 IoCs

resource	yara_rule
behavioral1/memory/1744-60-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/1744-62-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/1744-63-0x0000000000401130-mapping.dmp	family_isrstealer
behavioral1/memory/1744-68-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/1744-77-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1548-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1548-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1548-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1548-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1548-76-0x0000000000400000-0x0000000000453000-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 1080 set thread context of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1744 set thread context of 1548	1744	vbc.exe	29

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1744	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1080 wrote to memory of 1744	1080	895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe	28
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29
PID 1744 wrote to memory of 1548	1744	vbc.exe	29

C:\Users\Admin\AppData\Local\Temp\895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe
"C:\Users\Admin\AppData\Local\Temp\895211dae5a0a1549fcba2a540134bc82d962d348c0f6f9f0be543e6f1028b86.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1080
- 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:1744
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:1548

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1080-65-0x0000000074700000-0x0000000074CAB000-memory.dmp

Filesize
5.7MB

Download
memory/1080-55-0x0000000074700000-0x0000000074CAB000-memory.dmp

Filesize
5.7MB

Download
memory/1080-56-0x0000000074700000-0x0000000074CAB000-memory.dmp

Filesize
5.7MB

Download
memory/1080-54-0x00000000758C1000-0x00000000758C3000-memory.dmp

Filesize
8KB

Download
memory/1548-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1548-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1548-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1548-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1548-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1744-60-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1744-62-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1744-58-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1744-68-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1744-57-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1744-77-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

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