isrstealer | c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e

Analysis

max time kernel
176s
max time network
191s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2022 04:55

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General

Target

c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe
Size

1.1MB
MD5

b6e5ba759e4214e47e9b643c6db3869e
SHA1

1cfa3edb8d3da4ec40f9aebe6a6d110032da6640
SHA256

c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e
SHA512

0e1b7b04aa8493417a01acbca28c090b5e6d2ec83864ac11f1a9583b5321a078a469c5c12a54475766ed67695c33a86da71795ea5afbe2d3e9ce924d6ad4d1d5
SSDEEP

12288:VfVr/5D5Jy/ei02wu+OHW7/Bpk+EJJt/ZAyNIQACAFFDfCCDL3WM8iJO05k4NKO5:RV5Hy/phw/98m/fpv3WM8i9v

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 3 IoCs

resource	yara_rule
behavioral2/memory/4224-135-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4224-156-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4224-170-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3676-165-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3676-167-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4788-147-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4788-161-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4788-166-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

resource	yara_rule
behavioral2/memory/4788-147-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3424-164-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3676-165-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4788-161-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4788-166-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3676-167-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3424-168-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft

Executes dropped EXE 5 IoCs

pid	Process
4224	Service.exe
4700	Service.exe
4788	Service.exe
3424	Service.exe
3676	Service.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3424-151-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3676-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3424-162-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3676-163-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3424-164-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3676-165-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3676-167-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3424-168-0x0000000000400000-0x0000000000426000-memory.dmp	upx

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-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Service.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 2132 set thread context of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 4224 set thread context of 4700	4224	Service.exe	86
PID 4700 set thread context of 4788	4700	Service.exe	87
PID 4700 set thread context of 3424	4700	Service.exe	88
PID 4700 set thread context of 3676	4700	Service.exe	89

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 3 IoCs

pid	Process
2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe
3424	Service.exe
3424	Service.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe
Token: SeDebugPrivilege	3424	Service.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4224	Service.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 2132 wrote to memory of 4224	2132	c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe	85
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4224 wrote to memory of 4700	4224	Service.exe	86
PID 4700 wrote to memory of 4788	4700	Service.exe	87
PID 4700 wrote to memory of 4788	4700	Service.exe	87
PID 4700 wrote to memory of 4788	4700	Service.exe	87
PID 4700 wrote to memory of 4788	4700	Service.exe	87
PID 4700 wrote to memory of 4788	4700	Service.exe	87
PID 4700 wrote to memory of 3424	4700	Service.exe	88
PID 4700 wrote to memory of 3424	4700	Service.exe	88
PID 4700 wrote to memory of 3424	4700	Service.exe	88
PID 4700 wrote to memory of 3424	4700	Service.exe	88
PID 4700 wrote to memory of 3424	4700	Service.exe	88
PID 4700 wrote to memory of 3676	4700	Service.exe	89
PID 4700 wrote to memory of 3676	4700	Service.exe	89
PID 4700 wrote to memory of 3676	4700	Service.exe	89
PID 4700 wrote to memory of 3676	4700	Service.exe	89
PID 4700 wrote to memory of 3676	4700	Service.exe	89

C:\Users\Admin\AppData\Local\Temp\c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe
"C:\Users\Admin\AppData\Local\Temp\c1cd4599831b74bdbcdfd714440d72f582b1915e333702bee41e82e49ef15d9e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2132
- C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
  C:\Users\Admin\AppData\Local\Temp\\AppLaunch\Service.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4224
- - C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
    "C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4700
  - - C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
      "C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      Executes dropped EXE
      PID:4788
  - - C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
      "C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3424
  - - C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
      "C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Executes dropped EXE
      Accesses Microsoft Outlook accounts
      PID:3676

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\AppLaunch\Service.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\data.dmp

Filesize
54B

MD5
c10dbeca73f8835240e08e4511284b83

SHA1
0032f8f941cc07768189ca6ba32b1beede6b6917

SHA256
0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e

SHA512
34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967

Download Submit
memory/2132-132-0x0000000074FC0000-0x0000000075571000-memory.dmp

Filesize
5.7MB

Download
memory/2132-133-0x0000000074FC0000-0x0000000075571000-memory.dmp

Filesize
5.7MB

Download
memory/3424-168-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3424-164-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3424-151-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3424-162-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3676-167-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3676-163-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3676-165-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3676-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4224-156-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4224-135-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4224-170-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4700-144-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4700-145-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4700-159-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4700-142-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4700-160-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4788-161-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4788-166-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4788-147-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download