isrstealer | 3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4

General

Target

3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
Size

762KB
MD5

1c4dbd755e7ba59d2a4ce457f09f755b
SHA1

80b81ba84a6a507c241f5a99e34153fab47d3f0b
SHA256

3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4
SHA512

55a509c9a3be54093b13409da0f7720932e5eb9fab3d6322bcdef0755584aff10224bc98b4ae3db68261900e9a56359416cc0cffde429c0d0cf09fdccd07c90d

Score

10^/10

isrstealer spyware stealer suricata 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 5 IoCs

resource	yara_rule
behavioral2/memory/3392-134-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3392-138-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3392-147-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3392-151-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3392-156-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

suricata: ET MALWARE ISRStealer Checkin
suricata: ET MALWARE ISRStealer Checkin
suricata

Executes dropped EXE 3 IoCs

pid	Process
3392	svhost.exe
2364	svhost.exe
1584	svhost.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2364-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2364-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2364-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2364-148-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4920 set thread context of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 3392 set thread context of 2364	3392	svhost.exe	83
PID 3392 set thread context of 1584	3392	svhost.exe	86

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
File created	C:\Windows\assembly\Desktop.ini	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4964	1584	WerFault.exe	86

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3392	svhost.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4920 wrote to memory of 452	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	80
PID 4920 wrote to memory of 452	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	80
PID 4920 wrote to memory of 452	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	80
PID 4920 wrote to memory of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 4920 wrote to memory of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 4920 wrote to memory of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 4920 wrote to memory of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 4920 wrote to memory of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 4920 wrote to memory of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 4920 wrote to memory of 3392	4920	3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe	82
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 2364	3392	svhost.exe	83
PID 3392 wrote to memory of 1584	3392	svhost.exe	86
PID 3392 wrote to memory of 1584	3392	svhost.exe	86
PID 3392 wrote to memory of 1584	3392	svhost.exe	86
PID 3392 wrote to memory of 1584	3392	svhost.exe	86
PID 3392 wrote to memory of 1584	3392	svhost.exe	86
PID 3392 wrote to memory of 1584	3392	svhost.exe	86
PID 3392 wrote to memory of 1584	3392	svhost.exe	86
PID 3392 wrote to memory of 1584	3392	svhost.exe	86

C:\Users\Admin\AppData\Local\Temp\3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe
"C:\Users\Admin\AppData\Local\Temp\3848e61897e3fbc185353a109e0de82164d50a00e1c793290ad7cfd53a9807b4.exe"
1⤵
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4920
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe"
  2⤵
  PID:452
- C:\Users\Admin\AppData\Local\Temp\svhost.exe
  "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3392
- - C:\Users\Admin\AppData\Local\Temp\svhost.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\5tSJpxgezC.ini"
    3⤵
    - Executes dropped EXE
    PID:2364
- - C:\Users\Admin\AppData\Local\Temp\svhost.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Y3ysOYeewZ.ini"
    3⤵
    - Executes dropped EXE
    PID:1584
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1584 -s 80
      4⤵
      Program crash
      PID:4964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1584 -ip 1584
1⤵
PID:3552

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\5tSJpxgezC.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

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

Filesize
1.6MB

MD5
1c9ff7df71493896054a91bee0322ebf

SHA1
38f1c85965d58b910d8e8381b6b1099d5dfcbfe4

SHA256
e8b5da3394bbdd7868122ffd88d9d06afe31bd69d656857910d2f820c32d0efa

SHA512
aa0def62b663743e6c3c022182b35cff33cb9abf08453d5098f3c5d32b2a8b0cd1cc5de64b93e39680c1d1396fef1fd50b642ca3ea4ba1f6d1078321d96916ab

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

Filesize
1.6MB

MD5
1c9ff7df71493896054a91bee0322ebf

SHA1
38f1c85965d58b910d8e8381b6b1099d5dfcbfe4

SHA256
e8b5da3394bbdd7868122ffd88d9d06afe31bd69d656857910d2f820c32d0efa

SHA512
aa0def62b663743e6c3c022182b35cff33cb9abf08453d5098f3c5d32b2a8b0cd1cc5de64b93e39680c1d1396fef1fd50b642ca3ea4ba1f6d1078321d96916ab

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

Filesize
1.6MB

MD5
1c9ff7df71493896054a91bee0322ebf

SHA1
38f1c85965d58b910d8e8381b6b1099d5dfcbfe4

SHA256
e8b5da3394bbdd7868122ffd88d9d06afe31bd69d656857910d2f820c32d0efa

SHA512
aa0def62b663743e6c3c022182b35cff33cb9abf08453d5098f3c5d32b2a8b0cd1cc5de64b93e39680c1d1396fef1fd50b642ca3ea4ba1f6d1078321d96916ab

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

Filesize
1.6MB

MD5
1c9ff7df71493896054a91bee0322ebf

SHA1
38f1c85965d58b910d8e8381b6b1099d5dfcbfe4

SHA256
e8b5da3394bbdd7868122ffd88d9d06afe31bd69d656857910d2f820c32d0efa

SHA512
aa0def62b663743e6c3c022182b35cff33cb9abf08453d5098f3c5d32b2a8b0cd1cc5de64b93e39680c1d1396fef1fd50b642ca3ea4ba1f6d1078321d96916ab

Download Submit
memory/2364-148-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2364-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2364-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2364-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2364-152-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3392-151-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3392-134-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3392-138-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3392-147-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3392-156-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4920-130-0x00000000751C0000-0x0000000075771000-memory.dmp

Filesize
5.7MB

Download
memory/4920-150-0x00000000751C0000-0x0000000075771000-memory.dmp

Filesize
5.7MB

Download
memory/4920-132-0x00000000751C0000-0x0000000075771000-memory.dmp

Filesize
5.7MB

Download

Analysis

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