isrstealer | 093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f

Analysis

max time kernel
48s
max time network
47s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
20-10-2022 22:05

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General

Target

093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe
Size

485KB
MD5

e7bb4b978b5d6073c29d6b05a4e6f0d4
SHA1

fde1e9d4b5272e80cac626bc2f45b970a2302e2d
SHA256

093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f
SHA512

9f827cc3bfa6324db8b094a41cdc36af71a185df341498940f274ccdd72d432cfd40fd418396d5dc5f63e48e851cf6faf7fdd9c53e06a15947f81375757402bc
SSDEEP

6144:8P0T7oKuHVet3JA6CmbKw6F/zUCPCIcwyHH+5/gdVv1W+:8cfo9Vu3JYmCZjPyU/gFJ

Score

10^/10

isrstealer persistence 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 8 IoCs

resource	yara_rule
behavioral1/memory/2004-63-0x0000000000400000-0x0000000000439000-memory.dmp	family_isrstealer
behavioral1/memory/2004-64-0x0000000000401110-mapping.dmp	family_isrstealer
behavioral1/memory/2004-67-0x0000000000400000-0x0000000000439000-memory.dmp	family_isrstealer
behavioral1/memory/908-71-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/908-73-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/908-74-0x0000000000401130-mapping.dmp	family_isrstealer
behavioral1/memory/2004-76-0x0000000000400000-0x0000000000439000-memory.dmp	family_isrstealer
behavioral1/memory/908-86-0x0000000000400000-0x0000000000432000-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/1668-80-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-84-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-85-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-87-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-88-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\chrome = "C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe"	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1928 set thread context of 1564	1928	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	28
PID 1564 set thread context of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 2004 set thread context of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 908 set thread context of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 1564	1928	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	28
PID 1928 wrote to memory of 1564	1928	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	28
PID 1928 wrote to memory of 1564	1928	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	28
PID 1928 wrote to memory of 1564	1928	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	28
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 1564 wrote to memory of 2004	1564	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	29
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 2004 wrote to memory of 908	2004	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	30
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31
PID 908 wrote to memory of 1668	908	093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe	31

C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe
"C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe
  "C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe
    "C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe"
    3⤵
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2004
  - - C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe
      "C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:908
    - - C:\Users\Admin\AppData\Local\Temp\093e7b2d19181f9194b40847aeab16b86ac159ddce7d553b607febc63400724f.exe
        
        /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
        5⤵
        
        PID:1668

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/908-68-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/908-86-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/908-73-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/908-71-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/908-69-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1668-80-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-88-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-87-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-85-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-84-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2004-58-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-63-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-60-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-76-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-59-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-61-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-55-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-56-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2004-66-0x0000000076031000-0x0000000076033000-memory.dmp

Filesize
8KB

Download
memory/2004-67-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download