isrstealer | dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9

Analysis

max time kernel
150s
max time network
134s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04/01/2025, 18:53

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General

Target

JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
Size

368KB
MD5

7b3ff7f2f522779c5bd0cc9862190210
SHA1

efbbee045ba78058f6735a472343fe9748834be8
SHA256

dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9
SHA512

ca3acc3d41a819fb37fd7a37c27fb19250846f5174c4d132e8d4e9f30caaa84aa3405d8c65cafba08328b1c11c445d28136de5bca934aee10156304b43ecf9b6
SSDEEP

6144:bYXlu7PKTgM8jlcud0oTPP/eqTNYDWyys9YIusnowR/gVxoCiLXcisNC79FPQ2Hx:2rTgM8j6QxNpyVY6/gV8F

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/1236-320-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral1/files/0x002e000000019203-331.dat	family_isrstealer
behavioral1/memory/1236-381-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral1/memory/968-641-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral1/memory/968-702-0x0000000000400000-0x0000000000459000-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
2988	Host.exe
2136	BVGBV.exe
900	BVGBV.exe
2832	BVGBV.exe
968	Host.exe
2472	Host.exe
2944	VQAVQ.exe
3028	VQAVQ.exe
2092	VQAVQ.exe

Loads dropped DLL 16 IoCs

pid	Process
2300	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
2300	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
2136	BVGBV.exe
900	BVGBV.exe
968	Host.exe
968	Host.exe
968	Host.exe
968	Host.exe
968	Host.exe
2944	VQAVQ.exe
3028	VQAVQ.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-1-5-21-3063565911-2056067323-3330884624-1000\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 2712 set thread context of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 set thread context of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2136 set thread context of 900	2136	BVGBV.exe	34
PID 900 set thread context of 2832	900	BVGBV.exe	35
PID 2988 set thread context of 968	2988	Host.exe	36
PID 2988 set thread context of 2472	2988	Host.exe	37
PID 2944 set thread context of 3028	2944	VQAVQ.exe	39
PID 3028 set thread context of 2092	3028	VQAVQ.exe	40

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1236-320-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral1/memory/1236-381-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral1/memory/968-641-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral1/memory/968-702-0x0000000000400000-0x0000000000459000-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	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BVGBV.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VQAVQ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VQAVQ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BVGBV.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BVGBV.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VQAVQ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2136	BVGBV.exe
2136	BVGBV.exe
2136	BVGBV.exe
2136	BVGBV.exe
2944	VQAVQ.exe
2944	VQAVQ.exe
2944	VQAVQ.exe
2944	VQAVQ.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
2136	BVGBV.exe
2988	Host.exe
968	Host.exe
2944	VQAVQ.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 1236	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	30
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2712 wrote to memory of 2300	2712	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	31
PID 2300 wrote to memory of 2988	2300	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	32
PID 2300 wrote to memory of 2988	2300	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	32
PID 2300 wrote to memory of 2988	2300	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	32
PID 2300 wrote to memory of 2988	2300	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	32
PID 1236 wrote to memory of 2136	1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	33
PID 1236 wrote to memory of 2136	1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	33
PID 1236 wrote to memory of 2136	1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	33
PID 1236 wrote to memory of 2136	1236	JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe	33
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 2136 wrote to memory of 900	2136	BVGBV.exe	34
PID 900 wrote to memory of 2832	900	BVGBV.exe	35
PID 900 wrote to memory of 2832	900	BVGBV.exe	35
PID 900 wrote to memory of 2832	900	BVGBV.exe	35
PID 900 wrote to memory of 2832	900	BVGBV.exe	35
PID 900 wrote to memory of 2832	900	BVGBV.exe	35
PID 900 wrote to memory of 2832	900	BVGBV.exe	35
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 968	2988	Host.exe	36
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 2988 wrote to memory of 2472	2988	Host.exe	37
PID 968 wrote to memory of 2944	968	Host.exe	38
PID 968 wrote to memory of 2944	968	Host.exe	38
PID 968 wrote to memory of 2944	968	Host.exe	38
PID 968 wrote to memory of 2944	968	Host.exe	38

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1236
- - C:\Users\Admin\AppData\Local\Temp\BVGBV.exe
    "C:\Users\Admin\AppData\Local\Temp\BVGBV.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:2136
  - - C:\Users\Admin\AppData\Local\Temp\BVGBV.exe
      "C:\Users\Admin\AppData\Local\Temp\BVGBV.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:900
    - - C:\Users\Admin\AppData\Local\Temp\BVGBV.exe
        
        "C:\Users\Admin\AppData\Local\Temp\BVGBV.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:2832
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2300
- - C:\Users\Admin\AppData\Roaming\Host.exe
    "C:\Users\Admin\AppData\Roaming\Host.exe" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b3ff7f2f522779c5bd0cc9862190210.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2988
  - - 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:968
    - - C:\Users\Admin\AppData\Local\Temp\VQAVQ.exe
        
        "C:\Users\Admin\AppData\Local\Temp\VQAVQ.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:2944
      - C:\Users\Admin\AppData\Local\Temp\VQAVQ.exe
        
        "C:\Users\Admin\AppData\Local\Temp\VQAVQ.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        
        PID:3028
        
        C:\Users\Admin\AppData\Local\Temp\VQAVQ.exe
        
        "C:\Users\Admin\AppData\Local\Temp\VQAVQ.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
        7⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:2092
  - - 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:2472

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\BVGBV.exe

Filesize
320KB

MD5
ccc2260269cb43ddadda9444e3d112f7

SHA1
ddab46acc12d7c60a15fa363f88030f1dd539fcb

SHA256
8ca1bd039407381c33fb7ab570b6e95b0ce64b0d5ef64a1968f9b55647cc1911

SHA512
787d0b4f5d89b840a4917c78e46f963c8c96a96ec005b45d085222ef307c2a76f074c4a65ca033b038e1b7d1419c7cd3c5c5f3075c3ea24e546c68bdd7643fde

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

Filesize
368KB

MD5
7b3ff7f2f522779c5bd0cc9862190210

SHA1
efbbee045ba78058f6735a472343fe9748834be8

SHA256
dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9

SHA512
ca3acc3d41a819fb37fd7a37c27fb19250846f5174c4d132e8d4e9f30caaa84aa3405d8c65cafba08328b1c11c445d28136de5bca934aee10156304b43ecf9b6

Download Submit
memory/968-702-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/968-641-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1236-320-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1236-381-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/2712-34-0x0000000000280000-0x0000000000281000-memory.dmp

Filesize
4KB

Download
memory/2712-86-0x00000000002B0000-0x00000000002B1000-memory.dmp

Filesize
4KB

Download
memory/2712-116-0x0000000000370000-0x0000000000371000-memory.dmp

Filesize
4KB

Download
memory/2712-148-0x00000000003F0000-0x00000000003F1000-memory.dmp

Filesize
4KB

Download
memory/2712-44-0x0000000000290000-0x0000000000291000-memory.dmp

Filesize
4KB

Download
memory/2712-2-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2712-24-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/2712-14-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/2712-4-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download