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
behavioral1/memory/560-71-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/560-77-0x0000000000401130-mapping.dmp	family_isrstealer
behavioral1/memory/560-75-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2020-57-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/2020-59-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/2020-60-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/2020-63-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/2020-64-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/2020-67-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/2020-79-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/756-82-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-86-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-87-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-88-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-89-0x0000000000400000-0x0000000000453000-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 1672 set thread context of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 2020 set thread context of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 560 set thread context of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 1672 wrote to memory of 2020	1672	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	27
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 2020 wrote to memory of 560	2020	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	29
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30
PID 560 wrote to memory of 756	560	c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe	30

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:1672
- 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:2020
- - 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:560
  - - C:\Users\Admin\AppData\Local\Temp\c6f66898ab4ab5686050d9a03a84ca3988d3b9e4e047c7f6a7526c9ca46cd60f.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
      4⤵
      PID:756

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

memory/560-68-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/560-75-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/560-71-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/560-69-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/756-82-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-89-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-88-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-87-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-86-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-85-0x0000000075BD1000-0x0000000075BD3000-memory.dmp

Filesize
8KB

Download
memory/2020-57-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2020-79-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2020-64-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2020-56-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2020-59-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2020-60-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2020-63-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2020-67-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download

Analysis

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