isrstealer | c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f

General

Target

c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
Size

260KB
MD5

dd35f85322923c864042e32a7b897eed
SHA1

656e6d5192a48f9d2f397d4e079920e26544f33d
SHA256

c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f
SHA512

59e8dfed9f519fa163ce82d9f10257c2299719caa02ea98ca4b92dfd12f546136549e9fd232f06230e9969fd26d1675b991427868746ddc68855937bf574a61c
SSDEEP

6144:+xctcETisGSRcPwpSPsO5MyulQH1UjmWR1+MvA7Y3:+drhPwpSPKQH1USWVA7Y3

Score

10^/10

isrstealer 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/3744-144-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3744-146-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3744-148-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1220-135-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/1220-137-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/1220-138-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/1220-141-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/1220-142-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/1220-150-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/1408-153-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1408-155-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1408-156-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1408-157-0x0000000000400000-0x0000000000453000-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

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4972 set thread context of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 1220 set thread context of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 3744 set thread context of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 4972 wrote to memory of 1220	4972	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	80
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 1220 wrote to memory of 3744	1220	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	81
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82
PID 3744 wrote to memory of 1408	3744	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	82

C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
"C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
  "C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe"
  2⤵
  - Maps connected drives based on registry
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1220
- - C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
    "C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3744
  - - C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
      4⤵
      PID:1408

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

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\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1220-150-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1220-135-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1220-137-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1220-138-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1220-141-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1220-142-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1408-153-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1408-155-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1408-156-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1408-157-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3744-148-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3744-146-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3744-144-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing