isrstealer | c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64

Analysis

max time kernel
142s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-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 6 IoCs

resource	yara_rule
behavioral2/files/0x0008000000022e14-134.dat	family_isrstealer
behavioral2/files/0x0008000000022e14-135.dat	family_isrstealer
behavioral2/files/0x0008000000022e14-141.dat	family_isrstealer
behavioral2/files/0x0008000000022e14-146.dat	family_isrstealer
behavioral2/files/0x0008000000022e14-150.dat	family_isrstealer
behavioral2/files/0x0008000000022e14-156.dat	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4972-161-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4972-163-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2228-154-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/2228-145-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/2228-162-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

resource	yara_rule
behavioral2/memory/2228-154-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4956-160-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4972-161-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2228-145-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4972-163-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4956-164-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/2228-162-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

Executes dropped EXE 5 IoCs

pid	Process
4868	sx3.exe
2036	sx3.exe
2228	sx3.exe
4956	sx3.exe
4972	sx3.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4956-149-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4956-160-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4972-161-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4972-158-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4972-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4956-153-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4972-163-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4956-164-0x0000000000400000-0x0000000000426000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	sx3.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4868 set thread context of 2036	4868	sx3.exe	81
PID 2036 set thread context of 2228	2036	sx3.exe	82
PID 2036 set thread context of 4956	2036	sx3.exe	83
PID 2036 set thread context of 4972	2036	sx3.exe	84

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 10 IoCs

pid	Process
4868	sx3.exe
4868	sx3.exe
4868	sx3.exe
4868	sx3.exe
4868	sx3.exe
4868	sx3.exe
4868	sx3.exe
4868	sx3.exe
4956	sx3.exe
4956	sx3.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4956	sx3.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4868	sx3.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 808 wrote to memory of 4868	808	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe	80
PID 808 wrote to memory of 4868	808	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe	80
PID 808 wrote to memory of 4868	808	c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe	80
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 4868 wrote to memory of 2036	4868	sx3.exe	81
PID 2036 wrote to memory of 2228	2036	sx3.exe	82
PID 2036 wrote to memory of 2228	2036	sx3.exe	82
PID 2036 wrote to memory of 2228	2036	sx3.exe	82
PID 2036 wrote to memory of 2228	2036	sx3.exe	82
PID 2036 wrote to memory of 2228	2036	sx3.exe	82
PID 2036 wrote to memory of 4956	2036	sx3.exe	83
PID 2036 wrote to memory of 4956	2036	sx3.exe	83
PID 2036 wrote to memory of 4956	2036	sx3.exe	83
PID 2036 wrote to memory of 4956	2036	sx3.exe	83
PID 2036 wrote to memory of 4956	2036	sx3.exe	83
PID 2036 wrote to memory of 4972	2036	sx3.exe	84
PID 2036 wrote to memory of 4972	2036	sx3.exe	84
PID 2036 wrote to memory of 4972	2036	sx3.exe	84
PID 2036 wrote to memory of 4972	2036	sx3.exe	84
PID 2036 wrote to memory of 4972	2036	sx3.exe	84

C:\Users\Admin\AppData\Local\Temp\c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe
"C:\Users\Admin\AppData\Local\Temp\c0492b15c6325d42de72a7ed155f957e41598e210a1b4d1c902211f0b8f55d64.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:808
- C:\Users\Admin\AppData\Local\Temp\sx3.exe
  "C:\Users\Admin\AppData\Local\Temp\sx3.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4868
- - C:\Users\Admin\AppData\Local\Temp\sx3.exe
    "C:\Users\Admin\AppData\Local\Temp\sx3.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2036
  - - 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:2228
  - - 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 behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4956
  - - 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:4972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

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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
memory/808-132-0x0000000000570000-0x0000000000646000-memory.dmp

Filesize
856KB

Download
memory/808-136-0x00007FF8148F0000-0x00007FF8153B1000-memory.dmp

Filesize
10.8MB

Download
memory/2036-140-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2036-142-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2036-143-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2036-159-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2228-154-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2228-145-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2228-162-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4956-160-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4956-149-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4956-164-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4956-153-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4972-158-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4972-163-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4972-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4972-161-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download