isrstealer | 4abc945b21b66014655876d38f943cedf264760378baca3cb8c5953578401438

Analysis

max time kernel
28s
max time network
29s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
15/03/2025, 21:33

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General

Target

JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe
Size

602KB
MD5

77fe484c6fe1662924343098eebca2c2
SHA1

2297f067be6dee591fc2c8806a7230220328b79a
SHA256

4abc945b21b66014655876d38f943cedf264760378baca3cb8c5953578401438
SHA512

c845379f8a17a3626133114d3829b563bc53a06ed91c7a4dc489ff0a339df832e0717d25550f1fa026af2c1e6dcfcc033540ff2d5f39612109450fc3b2427fb5
SSDEEP

12288:c8qBf7bX+2+brqKG7ni9bgkWVkR69uGn0Adhd4bsUHXIRG:c8qNPX+2c4iho3umDDUY

Score

10^/10

isrstealer collection discovery 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/2484-12-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral1/memory/2484-8-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral1/memory/2484-14-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral1/memory/2484-63-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 8 IoCs

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

resource	yara_rule
behavioral1/memory/2728-42-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1308-53-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/1308-62-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/2728-45-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/2728-44-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/328-60-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1308-54-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/2728-65-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/328-60-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2728-42-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/2728-45-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/2728-44-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/2728-65-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wininit.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 2304 set thread context of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2484 set thread context of 2804	2484	wininit.exe	30
PID 2804 set thread context of 2728	2804	wininit.exe	31
PID 2804 set thread context of 1308	2804	wininit.exe	32
PID 2804 set thread context of 328	2804	wininit.exe	33

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1308-53-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1308-62-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/328-60-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/328-59-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/328-58-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1308-54-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1308-52-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1308-51-0x0000000000400000-0x0000000000426000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 6 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	wininit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wininit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wininit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wininit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wininit.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2484	wininit.exe
2484	wininit.exe
2484	wininit.exe
2484	wininit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe
Token: SeDebugPrivilege	1308	wininit.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2484	wininit.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2304 wrote to memory of 2484	2304	JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe	29
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2484 wrote to memory of 2804	2484	wininit.exe	30
PID 2804 wrote to memory of 2728	2804	wininit.exe	31
PID 2804 wrote to memory of 2728	2804	wininit.exe	31
PID 2804 wrote to memory of 2728	2804	wininit.exe	31
PID 2804 wrote to memory of 2728	2804	wininit.exe	31
PID 2804 wrote to memory of 2728	2804	wininit.exe	31
PID 2804 wrote to memory of 2728	2804	wininit.exe	31
PID 2804 wrote to memory of 1308	2804	wininit.exe	32
PID 2804 wrote to memory of 1308	2804	wininit.exe	32
PID 2804 wrote to memory of 1308	2804	wininit.exe	32
PID 2804 wrote to memory of 1308	2804	wininit.exe	32
PID 2804 wrote to memory of 1308	2804	wininit.exe	32
PID 2804 wrote to memory of 1308	2804	wininit.exe	32
PID 2804 wrote to memory of 328	2804	wininit.exe	33
PID 2804 wrote to memory of 328	2804	wininit.exe	33
PID 2804 wrote to memory of 328	2804	wininit.exe	33
PID 2804 wrote to memory of 328	2804	wininit.exe	33
PID 2804 wrote to memory of 328	2804	wininit.exe	33
PID 2804 wrote to memory of 328	2804	wininit.exe	33

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77fe484c6fe1662924343098eebca2c2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Windows\SysWOW64\wininit.exe
  "C:\Windows\system32\wininit.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2484
- - C:\Windows\SysWOW64\wininit.exe
    "C:\Windows\SysWOW64\wininit.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2804
  - - C:\Windows\SysWOW64\wininit.exe
      "C:\Windows\SysWOW64\wininit.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      System Location Discovery: System Language Discovery
      PID:2728
  - - C:\Windows\SysWOW64\wininit.exe
      "C:\Windows\SysWOW64\wininit.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:1308
  - - C:\Windows\SysWOW64\wininit.exe
      "C:\Windows\SysWOW64\wininit.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/328-60-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/328-55-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/328-58-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/328-59-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1308-51-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1308-53-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1308-52-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1308-54-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1308-46-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1308-62-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2304-0-0x0000000074441000-0x0000000074442000-memory.dmp

Filesize
4KB

Download
memory/2304-1-0x0000000074440000-0x00000000749EB000-memory.dmp

Filesize
5.7MB

Download
memory/2304-2-0x0000000074440000-0x00000000749EB000-memory.dmp

Filesize
5.7MB

Download
memory/2304-3-0x0000000074440000-0x00000000749EB000-memory.dmp

Filesize
5.7MB

Download
memory/2304-36-0x0000000074440000-0x00000000749EB000-memory.dmp

Filesize
5.7MB

Download
memory/2484-12-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2484-6-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2484-63-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2484-4-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2484-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2484-8-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2484-14-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2728-65-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2728-38-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2728-40-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2728-42-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2728-45-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2728-44-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2804-34-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-19-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-23-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-35-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-37-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-33-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-27-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-25-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-17-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-21-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-61-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2804-29-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download