isrstealer | a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17

Analysis

max time kernel
113s
max time network
123s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 04:45

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General

Target

a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
Size

368KB
MD5

2166580cdb35ef98a1683cb172717a16
SHA1

2289422b25f1fc9d7bd7de41790928f698c33a4f
SHA256

a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17
SHA512

faff7258e3526dd490a0dc825d898fbe1839be2c1b690688b55d89b8e12ea6fb7026721924ba8471ba2c668452931f26d8f8be9189d521c647fc0e5cf7db4365
SSDEEP

6144:bYXlu7PKTgM8jlcud0oTPP/eqTNYDWyys9YIusnowR/gVxoCiLXcisNC79FPQ2HF:2rTgM8j6QxNpyVY6/gV8Ft

Score

10^/10

isrstealer discovery 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 5 IoCs

resource	yara_rule
behavioral1/memory/2232-316-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral1/files/0x0009000000016cd8-330.dat	family_isrstealer
behavioral1/memory/2232-378-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral1/memory/2240-645-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral1/memory/2240-699-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\	Host.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\StubPath = "'C:\\Users\\Admin\\AppData\\Roaming\\Host.exe'"	Host.exe

Executes dropped EXE 9 IoCs

pid	Process
972	Host.exe
2460	GBLGC.exe
2368	GBLGC.exe
2424	GBLGC.exe
2240	Host.exe
1968	Host.exe
932	XRCWS.exe
2064	XRCWS.exe
2980	XRCWS.exe

Loads dropped DLL 16 IoCs

pid	Process
1768	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
1768	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
2460	GBLGC.exe
2368	GBLGC.exe
2240	Host.exe
2240	Host.exe
2240	Host.exe
2240	Host.exe
2240	Host.exe
932	XRCWS.exe
2064	XRCWS.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Samadbond = "C:\\Users\\Admin\\AppData\\Roaming\\Host.exe"	Host.exe

Suspicious use of SetThreadContext 8 IoCs

description	pid	Process	procid_target
PID 108 set thread context of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 set thread context of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 2460 set thread context of 2368	2460	GBLGC.exe	33
PID 2368 set thread context of 2424	2368	GBLGC.exe	34
PID 972 set thread context of 2240	972	Host.exe	35
PID 972 set thread context of 1968	972	Host.exe	36
PID 932 set thread context of 2064	932	XRCWS.exe	38
PID 2064 set thread context of 2980	2064	XRCWS.exe	39

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2232-316-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral1/memory/2232-378-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral1/memory/2240-645-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral1/memory/2240-699-0x0000000000400000-0x0000000000459000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GBLGC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	XRCWS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	XRCWS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	XRCWS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GBLGC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GBLGC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2460	GBLGC.exe
2460	GBLGC.exe
2460	GBLGC.exe
2460	GBLGC.exe
932	XRCWS.exe
932	XRCWS.exe
932	XRCWS.exe
932	XRCWS.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
972	Host.exe
2460	GBLGC.exe
2240	Host.exe
932	XRCWS.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 2232	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	29
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 108 wrote to memory of 1768	108	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	30
PID 1768 wrote to memory of 972	1768	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	31
PID 1768 wrote to memory of 972	1768	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	31
PID 1768 wrote to memory of 972	1768	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	31
PID 1768 wrote to memory of 972	1768	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	31
PID 2232 wrote to memory of 2460	2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	32
PID 2232 wrote to memory of 2460	2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	32
PID 2232 wrote to memory of 2460	2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	32
PID 2232 wrote to memory of 2460	2232	a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe	32
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2460 wrote to memory of 2368	2460	GBLGC.exe	33
PID 2368 wrote to memory of 2424	2368	GBLGC.exe	34
PID 2368 wrote to memory of 2424	2368	GBLGC.exe	34
PID 2368 wrote to memory of 2424	2368	GBLGC.exe	34
PID 2368 wrote to memory of 2424	2368	GBLGC.exe	34
PID 2368 wrote to memory of 2424	2368	GBLGC.exe	34
PID 2368 wrote to memory of 2424	2368	GBLGC.exe	34
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 2240	972	Host.exe	35
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 972 wrote to memory of 1968	972	Host.exe	36
PID 2240 wrote to memory of 932	2240	Host.exe	37
PID 2240 wrote to memory of 932	2240	Host.exe	37
PID 2240 wrote to memory of 932	2240	Host.exe	37
PID 2240 wrote to memory of 932	2240	Host.exe	37

C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
"C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:108
- C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
  "C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2232
- - C:\Users\Admin\AppData\Local\Temp\GBLGC.exe
    "C:\Users\Admin\AppData\Local\Temp\GBLGC.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2460
  - - C:\Users\Admin\AppData\Local\Temp\GBLGC.exe
      "C:\Users\Admin\AppData\Local\Temp\GBLGC.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2368
    - - C:\Users\Admin\AppData\Local\Temp\GBLGC.exe
        
        "C:\Users\Admin\AppData\Local\Temp\GBLGC.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:2424
- C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
  "C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Users\Admin\AppData\Roaming\Host.exe
    "C:\Users\Admin\AppData\Roaming\Host.exe" C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:972
  - - C:\Users\Admin\AppData\Roaming\Host.exe
      "C:\Users\Admin\AppData\Roaming\Host.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2240
    - - C:\Users\Admin\AppData\Local\Temp\XRCWS.exe
        
        "C:\Users\Admin\AppData\Local\Temp\XRCWS.exe"
        5⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:932
      - C:\Users\Admin\AppData\Local\Temp\XRCWS.exe
        
        "C:\Users\Admin\AppData\Local\Temp\XRCWS.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        
        PID:2064
        
        C:\Users\Admin\AppData\Local\Temp\XRCWS.exe
        
        "C:\Users\Admin\AppData\Local\Temp\XRCWS.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
        7⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:2980
  - - C:\Users\Admin\AppData\Roaming\Host.exe
      "C:\Users\Admin\AppData\Roaming\Host.exe"
      4⤵
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:1968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\data.dmp

Filesize
54B

MD5
c10dbeca73f8835240e08e4511284b83

SHA1
0032f8f941cc07768189ca6ba32b1beede6b6917

SHA256
0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e

SHA512
34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967

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

Filesize
320KB

MD5
ccc2260269cb43ddadda9444e3d112f7

SHA1
ddab46acc12d7c60a15fa363f88030f1dd539fcb

SHA256
8ca1bd039407381c33fb7ab570b6e95b0ce64b0d5ef64a1968f9b55647cc1911

SHA512
787d0b4f5d89b840a4917c78e46f963c8c96a96ec005b45d085222ef307c2a76f074c4a65ca033b038e1b7d1419c7cd3c5c5f3075c3ea24e546c68bdd7643fde

Download Submit
\Users\Admin\AppData\Roaming\Host.exe

Filesize
368KB

MD5
2166580cdb35ef98a1683cb172717a16

SHA1
2289422b25f1fc9d7bd7de41790928f698c33a4f

SHA256
a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17

SHA512
faff7258e3526dd490a0dc825d898fbe1839be2c1b690688b55d89b8e12ea6fb7026721924ba8471ba2c668452931f26d8f8be9189d521c647fc0e5cf7db4365

Download Submit
memory/108-34-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/108-24-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/108-14-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/108-2-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/108-44-0x0000000000280000-0x0000000000281000-memory.dmp

Filesize
4KB

Download
memory/108-4-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2232-316-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/2232-378-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/2240-645-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/2240-699-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download