isrstealer | 4138dc4d3e022c8b07238a11b602a0ff69caf99af236cf24a20295d753ec8b66

Analysis

max time kernel
93s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04/01/2025, 14:56 UTC

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General

Target

JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe
Size

349KB
MD5

7a50c281feea0a42e92925197fd9bd81
SHA1

130254f2739501ad83e04c02899c7ea9b2eca81f
SHA256

4138dc4d3e022c8b07238a11b602a0ff69caf99af236cf24a20295d753ec8b66
SHA512

1e8d6cb485aa169e7405ffb88dcef35b6443b0f1f43f4927fbb7f2719af1bfd04213f7e90ad48405f2dd2675cc19b7880101ef3b28e3aacbd6c71efb78822456
SSDEEP

6144:ybkHQbHl7cxAOheBuI17jCmnrXculxMgtg9A8zv9i1Qo96l6OB+knYru89x275yh:ybk+7uAOgQI5G4xxHm9AOv9iSo99S+Mw

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 2 IoCs

resource	yara_rule
behavioral2/memory/3736-8-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3736-10-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer
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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Java.exe"	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1784 set thread context of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 3736 set thread context of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 set thread context of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4688-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4688-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4688-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4688-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2364	4472	WerFault.exe	93

System Location Discovery: System Language Discovery 1 TTPs 3 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_7a50c281feea0a42e92925197fd9bd81.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 1784 wrote to memory of 3736	1784	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	90
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4688	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	91
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93
PID 3736 wrote to memory of 4472	3736	JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe	93

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1784
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3736
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\9KM6zpy27v.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4688
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\PnrtMjy4Qv.ini"
    3⤵
    PID:4472
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4472 -s 80
      4⤵
      Program crash
      PID:2364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 208 -p 4472 -ip 4472
1⤵
PID:2640

Network

DNS

8.8.8.8.in-addr.arpa

Remote address:

8.8.8.8:53

Request

8.8.8.8.in-addr.arpa

IN PTR

Response

8.8.8.8.in-addr.arpa

IN PTR

dnsgoogle
DNS

149.220.183.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

149.220.183.52.in-addr.arpa

IN PTR

Response
DNS

8.153.16.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

8.153.16.2.in-addr.arpa

IN PTR

Response

8.153.16.2.in-addr.arpa

IN PTR

a2-16-153-8deploystaticakamaitechnologiescom
DNS

22.160.190.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

22.160.190.20.in-addr.arpa

IN PTR

Response
DNS

95.221.229.192.in-addr.arpa

Remote address:

8.8.8.8:53

Request

95.221.229.192.in-addr.arpa

IN PTR

Response
DNS

133.211.185.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

133.211.185.52.in-addr.arpa

IN PTR

Response
DNS

sab2.netii.net

JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Remote address:

8.8.8.8:53

Request

sab2.netii.net

IN A

Response
DNS

sab2.netii.net

JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Remote address:

8.8.8.8:53

Request

sab2.netii.net

IN A

Response
DNS

sab2.netii.net

JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Remote address:

8.8.8.8:53

Request

sab2.netii.net

IN A

Response
DNS

sab2.netii.net

JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

Remote address:

8.8.8.8:53

Request

sab2.netii.net

IN A

Response
DNS

197.87.175.4.in-addr.arpa

Remote address:

8.8.8.8:53

Request

197.87.175.4.in-addr.arpa

IN PTR

Response
DNS

15.164.165.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

15.164.165.52.in-addr.arpa

IN PTR

Response
DNS

172.210.232.199.in-addr.arpa

Remote address:

8.8.8.8:53

Request

172.210.232.199.in-addr.arpa

IN PTR

Response
DNS

172.214.232.199.in-addr.arpa

Remote address:

8.8.8.8:53

Request

172.214.232.199.in-addr.arpa

IN PTR

Response
DNS

48.229.111.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

48.229.111.52.in-addr.arpa

IN PTR

Response

No results found

8.8.8.8:53

8.8.8.8.in-addr.arpa

dns

66 B
90 B
1
1

DNS Request

8.8.8.8.in-addr.arpa
8.8.8.8:53

149.220.183.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

149.220.183.52.in-addr.arpa
8.8.8.8:53

8.153.16.2.in-addr.arpa

dns

69 B
131 B
1
1

DNS Request

8.153.16.2.in-addr.arpa
8.8.8.8:53

22.160.190.20.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

22.160.190.20.in-addr.arpa
8.8.8.8:53

95.221.229.192.in-addr.arpa

dns

73 B
144 B
1
1

DNS Request

95.221.229.192.in-addr.arpa
8.8.8.8:53

133.211.185.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

133.211.185.52.in-addr.arpa
8.8.8.8:53

sab2.netii.net

dns

JaffaCakes118_7a50c281feea0a42e92925197fd9bd81.exe

240 B
240 B
4
4

DNS Request

sab2.netii.net

DNS Request

sab2.netii.net

DNS Request

sab2.netii.net

DNS Request

sab2.netii.net
8.8.8.8:53

197.87.175.4.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

197.87.175.4.in-addr.arpa
8.8.8.8:53

15.164.165.52.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

15.164.165.52.in-addr.arpa
8.8.8.8:53

172.210.232.199.in-addr.arpa

dns

74 B
128 B
1
1

DNS Request

172.210.232.199.in-addr.arpa
8.8.8.8:53

172.214.232.199.in-addr.arpa

dns

74 B
128 B
1
1

DNS Request

172.214.232.199.in-addr.arpa
8.8.8.8:53

48.229.111.52.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

48.229.111.52.in-addr.arpa

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

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 Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\9KM6zpy27v.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1784-20-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-0-0x00000000753F2000-0x00000000753F3000-memory.dmp

Filesize
4KB

Download
memory/1784-3-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-5-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-4-0x00000000753F2000-0x00000000753F3000-memory.dmp

Filesize
4KB

Download
memory/1784-6-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-2-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-1-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-7-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/3736-8-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3736-10-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4688-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4688-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4688-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4688-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

MITRE ATT&CK Enterprise v15

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