isrstealer | c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64

Analysis

max time kernel
41s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03-12-2022 05:55

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General

Target

c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe
Size

1024KB
MD5

945d2748f16fda917ffc2692a42002ab
SHA1

cc34c154813be71ecfa7cbae082501932ba8e01d
SHA256

c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64
SHA512

d140d5533db7adbb994524047bf29ae045289ce09d8e653290bac0cadacc9810e8eea33a3d28c9b47c6410f39b50314ea0db7e74208efc7cef314ec214be99e1
SSDEEP

12288:S0MN2KmANaNWY3JwN3rSA1cYBuOlIh1JhNAHatgl6:S0wAANaN7mXb7lcr0

Score

10^/10

isrstealer collection 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 10 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
C:\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
C:\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
C:\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
C:\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer
C:\Users\Admin\AppData\Local\Temp\sx3.exe	family_isrstealer

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/580-99-0x000000000041C3A0-mapping.dmp	MailPassView
behavioral1/memory/580-106-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/580-109-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/580-110-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 5 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/1276-80-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1276-81-0x000000000043F420-mapping.dmp	WebBrowserPassView
behavioral1/memory/1276-96-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1276-108-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1276-111-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 11 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1276-80-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1276-81-0x000000000043F420-mapping.dmp	Nirsoft
behavioral1/memory/1276-96-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/580-99-0x000000000041C3A0-mapping.dmp	Nirsoft
behavioral1/memory/580-106-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1924-100-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/1924-107-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/1276-108-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/580-109-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/580-110-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1276-111-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

Executes dropped EXE 5 IoCs

Processes:

sx3.exesx3.exesx3.exesx3.exesx3.exe

pid process

916 sx3.exe
956 sx3.exe
1276 sx3.exe
1924 sx3.exe
580 sx3.exe

pid	process
916	sx3.exe
956	sx3.exe
1276	sx3.exe
1924	sx3.exe
580	sx3.exe

UPX packed file 9 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1924-87-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/580-106-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/580-105-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1924-100-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1924-98-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/580-97-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1924-107-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/580-109-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/580-110-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Loads dropped DLL 4 IoCs

Processes:

sx3.exesx3.exe

pid process

916 sx3.exe
956 sx3.exe
956 sx3.exe
956 sx3.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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

pid	process
916	sx3.exe
956	sx3.exe
956	sx3.exe
956	sx3.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

sx3.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	sx3.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

sx3.exesx3.exe

description	pid	process	target process
PID 916 set thread context of 956	916	sx3.exe	sx3.exe
PID 956 set thread context of 1276	956	sx3.exe	sx3.exe
PID 956 set thread context of 1924	956	sx3.exe	sx3.exe
PID 956 set thread context of 580	956	sx3.exe	sx3.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

sx3.exe

pid process

916 sx3.exe
916 sx3.exe
916 sx3.exe
916 sx3.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

sx3.exe

description pid process

Token: SeDebugPrivilege 1924 sx3.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

sx3.exe

pid process

916 sx3.exe

pid	process
916	sx3.exe
916	sx3.exe
916	sx3.exe
916	sx3.exe

description	pid	process
Token: SeDebugPrivilege	1924	sx3.exe

pid	process
916	sx3.exe

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exesx3.exesx3.exe

description	pid	process	target process
PID 816 wrote to memory of 916	816	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe	sx3.exe
PID 816 wrote to memory of 916	816	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe	sx3.exe
PID 816 wrote to memory of 916	816	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe	sx3.exe
PID 816 wrote to memory of 916	816	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 916 wrote to memory of 956	916	sx3.exe	sx3.exe
PID 956 wrote to memory of 1276	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1276	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1276	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1276	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1276	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1276	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1924	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1924	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1924	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1924	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1924	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 1924	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 580	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 580	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 580	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 580	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 580	956	sx3.exe	sx3.exe
PID 956 wrote to memory of 580	956	sx3.exe	sx3.exe

C:\Users\Admin\AppData\Local\Temp\c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe
"C:\Users\Admin\AppData\Local\Temp\c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:816
- C:\Users\Admin\AppData\Local\Temp\sx3.exe
  "C:\Users\Admin\AppData\Local\Temp\sx3.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:916
- - C:\Users\Admin\AppData\Local\Temp\sx3.exe
    "C:\Users\Admin\AppData\Local\Temp\sx3.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:956
  - - C:\Users\Admin\AppData\Local\Temp\sx3.exe
      "C:\Users\Admin\AppData\Local\Temp\sx3.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      Executes dropped EXE
      PID:1276
  - - C:\Users\Admin\AppData\Local\Temp\sx3.exe
      "C:\Users\Admin\AppData\Local\Temp\sx3.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:1924
  - - C:\Users\Admin\AppData\Local\Temp\sx3.exe
      "C:\Users\Admin\AppData\Local\Temp\sx3.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Executes dropped EXE
      Accesses Microsoft Outlook accounts
      PID:580

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

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\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
C:\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
C:\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
C:\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
C:\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
C:\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
\Users\Admin\AppData\Local\Temp\sx3.exe

Filesize
444KB

MD5
ba7664077013b677689bd6af98eb87b9

SHA1
207d22d874ec90c169b38766883b89ffc108f3d3

SHA256
ec743c486760e376437dfb982817fc0ac39bb987a97eb04a9d4fdb2274304261

SHA512
fd989f99a3ebae0d19bcb465992639233c04891fda678a855a875bbb19b4bc25271adae22a95e440fca4035e733eb2fced01eb374488123d4d003a7b5aedccc1

Download Submit
memory/580-110-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/580-106-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/580-99-0x000000000041C3A0-mapping.dmp

Download
memory/580-91-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/580-105-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/580-97-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/580-109-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/816-54-0x0000000000380000-0x0000000000456000-memory.dmp

Filesize
856KB

Download
memory/816-55-0x000007FEFB731000-0x000007FEFB733000-memory.dmp

Filesize
8KB

Download
memory/916-56-0x0000000000000000-mapping.dmp

Download
memory/916-76-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download
memory/956-102-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-72-0x0000000000408E48-mapping.dmp

Download
memory/956-63-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-66-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-67-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-62-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-68-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-75-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-74-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-65-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-69-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/956-71-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1276-96-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1276-81-0x000000000043F420-mapping.dmp

Download
memory/1276-111-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1276-78-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1276-80-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1276-108-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1924-87-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1924-107-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1924-98-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1924-100-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1924-88-0x0000000000423BC0-mapping.dmp

Download
memory/1924-85-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download