isrstealer | d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e

Analysis

max time kernel
11s
max time network
65s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
29/11/2022, 12:50

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe
Size

1.7MB
MD5

8e909b372d7d2e2dd9c4009860353785
SHA1

49980560942fb08f9682f5f5f9fc9776f25c4ea3
SHA256

d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e
SHA512

8ce9c2e5f1d2eb6e00f2dc95d1c13c3de455017bdd5ca1547751ad5fe686f88833bfcd9e5daf57c3d0cc32d3e3def917138cf5728a15034b57fbeff137e35bac
SSDEEP

49152:30cWXWjEJJ83Os4Gi1t4bdvBUgTGLxiuZ7t:35+qEr837/HExiuZB

Score

10^/10

isrstealer stealer trojan

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
behavioral1/memory/1768-66-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1768-67-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1768-68-0x00000000004011F0-mapping.dmp	family_isrstealer
behavioral1/memory/1768-75-0x0000000000401000-0x0000000000412000-memory.dmp	family_isrstealer

Executes dropped EXE 3 IoCs

pid	Process
1412	explorer.exe
1984	WinRAR.4.11.x64.en.exe
1296	Process not Found

Loads dropped DLL 5 IoCs

pid	Process
1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe
1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe
1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe
1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe
1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1412 set thread context of 1768	1412	explorer.exe	28

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\Main	WinRAR.4.11.x64.en.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1412	explorer.exe
1412	explorer.exe
1768	AppLaunch.exe
1768	AppLaunch.exe
1768	AppLaunch.exe
1768	AppLaunch.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1412	explorer.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1768	AppLaunch.exe
1984	WinRAR.4.11.x64.en.exe
1984	WinRAR.4.11.x64.en.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 1412	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	27
PID 1220 wrote to memory of 1412	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	27
PID 1220 wrote to memory of 1412	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	27
PID 1220 wrote to memory of 1412	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	27
PID 1220 wrote to memory of 1412	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	27
PID 1220 wrote to memory of 1412	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	27
PID 1220 wrote to memory of 1412	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	27
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1412 wrote to memory of 1768	1412	explorer.exe	28
PID 1220 wrote to memory of 1984	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	29
PID 1220 wrote to memory of 1984	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	29
PID 1220 wrote to memory of 1984	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	29
PID 1220 wrote to memory of 1984	1220	d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe	29

C:\Users\Admin\AppData\Local\Temp\d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe
"C:\Users\Admin\AppData\Local\Temp\d21e0a13be0061653b88d7a5c62299f7658ff7f82e372760233ba775622a997e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1220
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1412
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
    C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:1768
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR.4.11.x64.en.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR.4.11.x64.en.exe"
  2⤵
  - Executes dropped EXE
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1984

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR.4.11.x64.en.exe

Filesize
1.6MB

MD5
dfd98fdf22cae97d52e93521bb99e42a

SHA1
f554deaf3b169f6a2598d5773087377f94395418

SHA256
6b764143299e51e2fc384012000959ac5eb94f08a0ab405e8d38f0509bfd5328

SHA512
fc56b6d83ff2b1e8b955881dc49a5d117002b62f0579d681d84a27370f84cc1ecdc56f06593b6bdfdb4b3e39af1df610943d9723ead48c7f4b2d64c4aa3b5679

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR.4.11.x64.en.exe

Filesize
1.6MB

MD5
dfd98fdf22cae97d52e93521bb99e42a

SHA1
f554deaf3b169f6a2598d5773087377f94395418

SHA256
6b764143299e51e2fc384012000959ac5eb94f08a0ab405e8d38f0509bfd5328

SHA512
fc56b6d83ff2b1e8b955881dc49a5d117002b62f0579d681d84a27370f84cc1ecdc56f06593b6bdfdb4b3e39af1df610943d9723ead48c7f4b2d64c4aa3b5679

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

Filesize
157KB

MD5
1b65568bc870cca49117f9ebb3cd2d59

SHA1
8221ed9e44ff774c170f8c95f42133b305df6a4d

SHA256
87027d70026820e045d60273da56dcd87b79201857e5884502ee06d2a5258e42

SHA512
9791d13ab9542d813be3639b5a15b425fcd744526d16d2cf04055ad387e63540cd4fdab8e31403107536d9f4dfd3c5afc132158449312bab03204f52c61ad868

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

Filesize
157KB

MD5
1b65568bc870cca49117f9ebb3cd2d59

SHA1
8221ed9e44ff774c170f8c95f42133b305df6a4d

SHA256
87027d70026820e045d60273da56dcd87b79201857e5884502ee06d2a5258e42

SHA512
9791d13ab9542d813be3639b5a15b425fcd744526d16d2cf04055ad387e63540cd4fdab8e31403107536d9f4dfd3c5afc132158449312bab03204f52c61ad868

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR.4.11.x64.en.exe

Filesize
1.6MB

MD5
dfd98fdf22cae97d52e93521bb99e42a

SHA1
f554deaf3b169f6a2598d5773087377f94395418

SHA256
6b764143299e51e2fc384012000959ac5eb94f08a0ab405e8d38f0509bfd5328

SHA512
fc56b6d83ff2b1e8b955881dc49a5d117002b62f0579d681d84a27370f84cc1ecdc56f06593b6bdfdb4b3e39af1df610943d9723ead48c7f4b2d64c4aa3b5679

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR.4.11.x64.en.exe

Filesize
1.6MB

MD5
dfd98fdf22cae97d52e93521bb99e42a

SHA1
f554deaf3b169f6a2598d5773087377f94395418

SHA256
6b764143299e51e2fc384012000959ac5eb94f08a0ab405e8d38f0509bfd5328

SHA512
fc56b6d83ff2b1e8b955881dc49a5d117002b62f0579d681d84a27370f84cc1ecdc56f06593b6bdfdb4b3e39af1df610943d9723ead48c7f4b2d64c4aa3b5679

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

Filesize
157KB

MD5
1b65568bc870cca49117f9ebb3cd2d59

SHA1
8221ed9e44ff774c170f8c95f42133b305df6a4d

SHA256
87027d70026820e045d60273da56dcd87b79201857e5884502ee06d2a5258e42

SHA512
9791d13ab9542d813be3639b5a15b425fcd744526d16d2cf04055ad387e63540cd4fdab8e31403107536d9f4dfd3c5afc132158449312bab03204f52c61ad868

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

Filesize
157KB

MD5
1b65568bc870cca49117f9ebb3cd2d59

SHA1
8221ed9e44ff774c170f8c95f42133b305df6a4d

SHA256
87027d70026820e045d60273da56dcd87b79201857e5884502ee06d2a5258e42

SHA512
9791d13ab9542d813be3639b5a15b425fcd744526d16d2cf04055ad387e63540cd4fdab8e31403107536d9f4dfd3c5afc132158449312bab03204f52c61ad868

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

Filesize
157KB

MD5
1b65568bc870cca49117f9ebb3cd2d59

SHA1
8221ed9e44ff774c170f8c95f42133b305df6a4d

SHA256
87027d70026820e045d60273da56dcd87b79201857e5884502ee06d2a5258e42

SHA512
9791d13ab9542d813be3639b5a15b425fcd744526d16d2cf04055ad387e63540cd4fdab8e31403107536d9f4dfd3c5afc132158449312bab03204f52c61ad868

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

Filesize
157KB

MD5
1b65568bc870cca49117f9ebb3cd2d59

SHA1
8221ed9e44ff774c170f8c95f42133b305df6a4d

SHA256
87027d70026820e045d60273da56dcd87b79201857e5884502ee06d2a5258e42

SHA512
9791d13ab9542d813be3639b5a15b425fcd744526d16d2cf04055ad387e63540cd4fdab8e31403107536d9f4dfd3c5afc132158449312bab03204f52c61ad868

Download Submit
memory/1220-54-0x0000000075141000-0x0000000075143000-memory.dmp

Filesize
8KB

Download
memory/1412-74-0x0000000073C80000-0x000000007422B000-memory.dmp

Filesize
5.7MB

Download
memory/1768-67-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1768-75-0x0000000000401000-0x0000000000412000-memory.dmp

Filesize
68KB

Download
memory/1768-63-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1768-66-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1768-64-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1984-79-0x000007FEFB931000-0x000007FEFB933000-memory.dmp

Filesize
8KB

Download