isrstealer | 0734e46043e3b7a82176386c4c8d5f572fb9673c94d4047a370a25c1035c87ce

Analysis

max time kernel
95s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12-12-2024 22:01

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General

Target

e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe
Size

567KB
MD5

e87a68565079ec9337b38daf24abb7ed
SHA1

37cc35d9cdf9b1b372c9b6798fc01fa4b320639c
SHA256

0734e46043e3b7a82176386c4c8d5f572fb9673c94d4047a370a25c1035c87ce
SHA512

6f3f6ba6f26f10b942db0d002487f356bdc9045cf312d46a55b7f31343eac9599be43bb8eb2fd35cae9ca3a2fa895384fc88f3d97780fad33d9b866c08c8eb23
SSDEEP

6144:sYLtsu1F9czs6SNy1bveBJIMPlYkZmOgSnMA4Csn7OiiqLIKu3G8qyWg+RB:L1F9czs6WyCJ/PlBnp/mIv3yyW

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/4044-11-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4044-15-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4044-36-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4044-37-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 3 IoCs

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

resource	yara_rule
behavioral2/memory/4552-33-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4552-34-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4552-35-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4552-33-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4552-34-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4552-35-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Executes dropped EXE 3 IoCs

pid	Process
4044	svhost.exe
3668	svhost.exe
4552	svhost.exe

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-1-5-21-3350944739-639801879-157714471-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svhost.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1020 set thread context of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 4044 set thread context of 3668	4044	svhost.exe	87
PID 4044 set thread context of 4552	4044	svhost.exe	90

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3668-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3668-21-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3668-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3668-23-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3668-25-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4552-29-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4552-32-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4552-33-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4552-34-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4552-35-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe
File created	C:\Windows\assembly\Desktop.ini	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe

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 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	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svhost.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4484	reg.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe
1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4044	svhost.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 1020 wrote to memory of 4152	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	83
PID 1020 wrote to memory of 4152	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	83
PID 1020 wrote to memory of 4152	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	83
PID 4152 wrote to memory of 4484	4152	cmd.exe	85
PID 4152 wrote to memory of 4484	4152	cmd.exe	85
PID 4152 wrote to memory of 4484	4152	cmd.exe	85
PID 1020 wrote to memory of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 1020 wrote to memory of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 1020 wrote to memory of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 1020 wrote to memory of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 1020 wrote to memory of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 1020 wrote to memory of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 1020 wrote to memory of 4044	1020	e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe	86
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 3668	4044	svhost.exe	87
PID 4044 wrote to memory of 4552	4044	svhost.exe	90
PID 4044 wrote to memory of 4552	4044	svhost.exe	90
PID 4044 wrote to memory of 4552	4044	svhost.exe	90
PID 4044 wrote to memory of 4552	4044	svhost.exe	90
PID 4044 wrote to memory of 4552	4044	svhost.exe	90
PID 4044 wrote to memory of 4552	4044	svhost.exe	90
PID 4044 wrote to memory of 4552	4044	svhost.exe	90
PID 4044 wrote to memory of 4552	4044	svhost.exe	90

C:\Users\Admin\AppData\Local\Temp\e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e87a68565079ec9337b38daf24abb7ed_JaffaCakes118.exe"
1⤵
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1020
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4152
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\intreheq\pingoere.exe.lnk " /f
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    PID:4484
- C:\Users\Admin\AppData\Local\Temp\svhost.exe
  "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4044
- - C:\Users\Admin\AppData\Local\Temp\svhost.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\8VQ1qPrUNI.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3668
- - C:\Users\Admin\AppData\Local\Temp\svhost.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\IH3QNnOyMF.ini"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4552

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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\8VQ1qPrUNI.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\intreheq\pingoere.exe

Filesize
567KB

MD5
e87a68565079ec9337b38daf24abb7ed

SHA1
37cc35d9cdf9b1b372c9b6798fc01fa4b320639c

SHA256
0734e46043e3b7a82176386c4c8d5f572fb9673c94d4047a370a25c1035c87ce

SHA512
6f3f6ba6f26f10b942db0d002487f356bdc9045cf312d46a55b7f31343eac9599be43bb8eb2fd35cae9ca3a2fa895384fc88f3d97780fad33d9b866c08c8eb23

Download Submit
C:\Users\Admin\AppData\Local\Temp\svhost.exe

Filesize
57KB

MD5
454501a66ad6e85175a6757573d79f8b

SHA1
8ca96c61f26a640a5b1b1152d055260b9d43e308

SHA256
7fd4f35aff4a0d4bfaae3a5dfb14b94934276df0e96d1a417a8f3693915e72c8

SHA512
9dc3b9a9b7e661acc3ac9a0ff4fd764097fc41ccbc2e7969cae9805cc693a87e8255e459ea5f315271825e7e517a46649acc8d42122a8018264cc3f2efa34fb7

Download Submit
memory/1020-0-0x0000000074BF2000-0x0000000074BF3000-memory.dmp

Filesize
4KB

Download
memory/1020-1-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/1020-2-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/1020-27-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/3668-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3668-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3668-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3668-25-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3668-21-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4044-36-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4044-15-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4044-11-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4044-37-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4552-29-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4552-34-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4552-35-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4552-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4552-32-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download