isrstealer | 37cbbbdcf8cb64cbd9c166fe0d7ad96fb998564028779841fec680d3a94db310

Analysis

max time kernel
16s
max time network
16s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-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
behavioral1/memory/2760-15-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2760-32-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2760-41-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2760-42-0x0000000000400000-0x0000000000442000-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
behavioral1/memory/2676-37-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2676-40-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2676-37-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2676-40-0x0000000000400000-0x000000000041F000-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-1-5-21-2703099537-420551529-3771253338-1000\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)	\??\O:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\P:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\Q:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\U:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\W:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\K:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\V:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\Y:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\I:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\J:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\L:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\S:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\T:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\E:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\G:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\H:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\N:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\R:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\X:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\Z:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\A:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\B:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
File opened (read-only)	\??\M:	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2508 set thread context of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2716 set thread context of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2760 set thread context of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 set thread context of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2280-23-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2280-25-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2280-26-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2280-27-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2280-29-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2676-33-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2676-35-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2676-36-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2676-37-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2676-40-0x0000000000400000-0x000000000041F000-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 SetWindowsHookEx 3 IoCs

pid	Process
2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe
2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2508 wrote to memory of 2716	2508	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.exe	30
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2716 wrote to memory of 2760	2716	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	31
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2280	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	32
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34
PID 2760 wrote to memory of 2676	2760	JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE	34

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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2508
- 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:2716
- - 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:2760
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
      /scomma "C:\Users\Admin\AppData\Local\Temp\rbKghNPURq.ini"
      4⤵
      System Location Discovery: System Language Discovery
      PID:2280
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aac6f3bc2324aa1e4fb548117904bdb.EXE
      /scomma "C:\Users\Admin\AppData\Local\Temp\77WyruJOUe.ini"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2676

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\Temp\rbKghNPURq.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2280-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2280-29-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2280-27-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2280-26-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2280-25-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2676-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2676-35-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2676-40-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2676-38-0x0000000000420000-0x0000000000487000-memory.dmp

Filesize
412KB

Download
memory/2676-37-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2676-36-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2716-6-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2716-10-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2716-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2716-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2716-18-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2716-4-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2716-12-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2760-32-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2760-15-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2760-41-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2760-42-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download