isrstealer | 5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab

Analysis

max time kernel
128s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
24-07-2022 05:10

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General

Target

5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
Size

989KB
MD5

09f7912493d7b995e0d765387b8ce2a1
SHA1

0bcf195f1a77e3d02c67b532780796fb1a37d25f
SHA256

5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab
SHA512

97cd60f9afca58ccd0b52d54ac9b0f4ea8f7c2d03a500ee16df7e1d3ce1a1c4fca13ee5e919e4787c44729a4bff45a28f9831e07259649064e77de889be1dba1

Score

10^/10

isrstealer netwire botnet collection persistence rat spyware stealer trojan upx

Malware Config

Extracted

Family

netwire

91.192.100.25:3369

Attributes

activex_autorun
true
activex_key
{3757GA31-8R2X-4686-5K7C-I4FIR5682QEX}
copy_executable
false
delete_original
false
host_id
HostId-%Rand%
lock_executable
false
offline_keylogger
false
password
Password
registry_autorun
true
startup_name
NetWire
use_mutex
false

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 4 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\Desktop\Server.exe	family_isrstealer
C:\Users\Admin\Desktop\Server.exe	family_isrstealer
C:\Users\Admin\Desktop\Server.exe	family_isrstealer
C:\Users\Admin\Desktop\Server.exe	family_isrstealer

NetWire RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1320-157-0x0000000000400000-0x000000000042C000-memory.dmp	netwire
behavioral2/memory/1320-159-0x0000000000400000-0x000000000042C000-memory.dmp	netwire
behavioral2/memory/1320-160-0x0000000000400000-0x000000000042C000-memory.dmp	netwire

Netwire
Netwire is a RAT with main functionalities focused password stealing and keylogging, but also includes remote control capabilities as well.
botnet stealer netwire

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/3136-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3136-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3136-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3136-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

Executes dropped EXE 3 IoCs

Processes:

Server.exeServer.exeServer.exe

pid process

3944 Server.exe
2460 Server.exe
3136 Server.exe

pid	process
3944	Server.exe
2460	Server.exe
3136	Server.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{3757GA31-8R2X-4686-5K7C-I4FIR5682QEX}	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{3757GA31-8R2X-4686-5K7C-I4FIR5682QEX}\StubPath = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe\""	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2460-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2460-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2460-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2460-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3136-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3136-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3136-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3136-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Control Panel\International\Geo\Nation	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

Server.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NetWire = "C:\\Users\\Admin\\AppData\\Local\\Temp\\5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe"	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Server.exe5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

description	pid	process	target process
PID 3944 set thread context of 2460	3944	Server.exe	Server.exe
PID 3944 set thread context of 3136	3944	Server.exe	Server.exe
PID 4784 set thread context of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

description pid process

Token: SeDebugPrivilege 4784 5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Server.exe

pid process

3944 Server.exe

description	pid	process
Token: SeDebugPrivilege	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

pid	process
3944	Server.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.execmd.exeServer.exe

description	pid	process	target process
PID 4784 wrote to memory of 1156	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	cmd.exe
PID 4784 wrote to memory of 1156	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	cmd.exe
PID 4784 wrote to memory of 1156	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	cmd.exe
PID 1156 wrote to memory of 3944	1156	cmd.exe	Server.exe
PID 1156 wrote to memory of 3944	1156	cmd.exe	Server.exe
PID 1156 wrote to memory of 3944	1156	cmd.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 2460	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 3944 wrote to memory of 3136	3944	Server.exe	Server.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
PID 4784 wrote to memory of 1320	4784	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe	5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe

C:\Users\Admin\AppData\Local\Temp\5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
"C:\Users\Admin\AppData\Local\Temp\5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4784

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c, "C:\Users\Admin\Desktop\Server.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1156

C:\Users\Admin\Desktop\Server.exe
"C:\Users\Admin\Desktop\Server.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3944

C:\Users\Admin\Desktop\Server.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\udj3xVH9Z8.ini"
4⤵
- Executes dropped EXE
PID:2460

C:\Users\Admin\Desktop\Server.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\L5mpRmpTLi.ini"
4⤵
- Executes dropped EXE
- Accesses Microsoft Outlook accounts
PID:3136

C:\Users\Admin\AppData\Local\Temp\5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe
"C:\Users\Admin\AppData\Local\Temp\5927e4d65f85b8656396c8f02379f3954d38f19ac63e9d00596f666f6dc796ab.exe"
2⤵
- Modifies Installed Components in the registry
- Adds Run key to start application
PID:1320

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

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\udj3xVH9Z8.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\Desktop\Server.exe

Filesize
260KB

MD5
e8f2b14ab5381c021c8085c43be1804b

SHA1
d10afc60fb1347b2b3c44fee4456fa94bcf95b8f

SHA256
7557fabff96ad819525f43a133680cc1ef3acb61a5f8e3df4c385b6244ad6fed

SHA512
2dd2cee9ba3a1e327fa517cbe81fb0180e6216932df1cb9581ed4e4b9a0ff54b50c875629aaa2e17af91172b60d65ca326b4690a4ca182b88913cfb87c12e7cc

Download Submit
C:\Users\Admin\Desktop\Server.exe

Filesize
260KB

MD5
e8f2b14ab5381c021c8085c43be1804b

SHA1
d10afc60fb1347b2b3c44fee4456fa94bcf95b8f

SHA256
7557fabff96ad819525f43a133680cc1ef3acb61a5f8e3df4c385b6244ad6fed

SHA512
2dd2cee9ba3a1e327fa517cbe81fb0180e6216932df1cb9581ed4e4b9a0ff54b50c875629aaa2e17af91172b60d65ca326b4690a4ca182b88913cfb87c12e7cc

Download Submit
C:\Users\Admin\Desktop\Server.exe

Filesize
260KB

MD5
e8f2b14ab5381c021c8085c43be1804b

SHA1
d10afc60fb1347b2b3c44fee4456fa94bcf95b8f

SHA256
7557fabff96ad819525f43a133680cc1ef3acb61a5f8e3df4c385b6244ad6fed

SHA512
2dd2cee9ba3a1e327fa517cbe81fb0180e6216932df1cb9581ed4e4b9a0ff54b50c875629aaa2e17af91172b60d65ca326b4690a4ca182b88913cfb87c12e7cc

Download Submit
C:\Users\Admin\Desktop\Server.exe

Filesize
260KB

MD5
e8f2b14ab5381c021c8085c43be1804b

SHA1
d10afc60fb1347b2b3c44fee4456fa94bcf95b8f

SHA256
7557fabff96ad819525f43a133680cc1ef3acb61a5f8e3df4c385b6244ad6fed

SHA512
2dd2cee9ba3a1e327fa517cbe81fb0180e6216932df1cb9581ed4e4b9a0ff54b50c875629aaa2e17af91172b60d65ca326b4690a4ca182b88913cfb87c12e7cc

Download Submit
memory/1156-134-0x0000000000000000-mapping.dmp

Download
memory/1320-160-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1320-159-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1320-157-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1320-156-0x0000000000000000-mapping.dmp

Download
memory/2460-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2460-140-0x0000000000000000-mapping.dmp

Download
memory/2460-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2460-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2460-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3136-148-0x0000000000000000-mapping.dmp

Download
memory/3136-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3136-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3136-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3136-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3944-135-0x0000000000000000-mapping.dmp

Download
memory/4784-130-0x0000000000E50000-0x0000000000F4C000-memory.dmp

Filesize
1008KB

Download
memory/4784-155-0x00000000079D0000-0x0000000007A6C000-memory.dmp

Filesize
624KB

Download
memory/4784-133-0x0000000005A30000-0x0000000005A3A000-memory.dmp

Filesize
40KB

Download
memory/4784-132-0x00000000058F0000-0x0000000005982000-memory.dmp

Filesize
584KB

Download
memory/4784-131-0x0000000005F80000-0x0000000006524000-memory.dmp

Filesize
5.6MB

Download