isrstealer | 37cbbbdcf8cb64cbd9c166fe0d7ad96fb998564028779841fec680d3a94db310

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2025, 08:12

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General

Target

JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
Size

420KB
MD5

0aac6f3bc2324aa1e4fb548117904bdb
SHA1

28db5bc8fca2baa3ee40c912575ff9eb9ce5c094
SHA256

37cbbbdcf8cb64cbd9c166fe0d7ad96fb998564028779841fec680d3a94db310
SHA512

944102d333ff7e82ef73e258cf698cbac3488ba011cb475c37d50e7a5578d5947242c3a0731ad5eb871a1e6228faa97341a4d5aaca1a47b11c53d9a625f19820
SSDEEP

6144:txdgGH6aU1CJNUSNXgB+3+PBhESZPu59chmAawYBLHp4t5mVHnbOd:t/aCHXeB8YhESZWXomAvYBLit5gOd

Score

10^/10

isrstealer collection discovery 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 4 IoCs

resource	yara_rule
behavioral2/memory/3800-25-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3800-27-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3800-48-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3800-49-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 2 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3944-44-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3944-47-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3944-44-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3944-47-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2593460650-190333679-3676257533-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\N:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\P:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\Q:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\S:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\X:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\A:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\B:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\T:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\Y:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\G:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\U:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\W:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\Z:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\E:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\H:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\I:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\K:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\L:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\O:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\R:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\V:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\J:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\M:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 836 set thread context of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 3368 set thread context of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3800 set thread context of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 set thread context of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2924-32-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2924-34-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2924-35-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2924-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2924-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3944-42-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3944-43-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3944-44-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3944-47-0x0000000000400000-0x000000000041F000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 5 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_0aac6f3bc2324aa1e4fb548117904bdb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
Token: SeCreatePagefilePrivilege	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
Token: SeShutdownPrivilege	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
Token: SeCreatePagefilePrivilege	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 836 wrote to memory of 3368	836	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	87
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3368 wrote to memory of 3800	3368	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	88
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 2924	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	89
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90
PID 3800 wrote to memory of 3944	3800	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	90

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe"
1⤵
- Enumerates connected drives
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:836
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3368
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3800
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
      /scomma "C:\Users\Admin\AppData\Local\Temp\apNMGoaUpd.ini"
      4⤵
      System Location Discovery: System Language Discovery
      PID:2924
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
      /scomma "C:\Users\Admin\AppData\Local\Temp\txVZS38F2g.ini"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:3944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows Media\12.0\WMSDKNS.XML

Filesize
9KB

MD5
7050d5ae8acfbe560fa11073fef8185d

SHA1
5bc38e77ff06785fe0aec5a345c4ccd15752560e

SHA256
cb87767c4a384c24e4a0f88455f59101b1ae7b4fb8de8a5adb4136c5f7ee545b

SHA512
a7a295ac8921bb3dde58d4bcde9372ed59def61d4b7699057274960fa8c1d1a1daff834a93f7a0698e9e5c16db43af05e9fd2d6d7c9232f7d26ffcff5fc5900b

Download Submit
C:\Users\Admin\AppData\Local\Temp\apNMGoaUpd.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2924-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2924-32-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2924-34-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2924-35-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2924-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3368-12-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3368-14-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3368-30-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3800-27-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3800-25-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3800-48-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3800-49-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3944-42-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3944-43-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3944-44-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3944-45-0x0000000000420000-0x00000000004E9000-memory.dmp

Filesize
804KB

Download
memory/3944-47-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download