isrstealer | 7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c

Analysis

max time kernel
133s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2022 14:58

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General

Target

7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe
Size

269KB
MD5

8269b1107aeefdb83374ecc9149878f5
SHA1

274e6dabe1574074fc4303167030fd21d184789e
SHA256

7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c
SHA512

f16f8c9812fd1b56093882f9d8d3bdcabb43d1fbdcedbfe6bd83cf820316a7b772a913d5a6ce61957c676f6057f9aac614a072bcbdd320c8b52379d937949b3b
SSDEEP

6144:BP8ilqgFAjN98/Un8Ple1evMigXAuQoYE1R:BP8ilPKROs8JvNgXBQPE1

Score

10^/10

isrstealer persistence 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 1 IoCs

resource	yara_rule
behavioral2/memory/2348-135-0x0000000000370000-0x00000000003B2000-memory.dmp	family_isrstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82

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

System Information Discovery
T1082

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1832	reg.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82
PID 2280 wrote to memory of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82
PID 2280 wrote to memory of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82
PID 2280 wrote to memory of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82
PID 2280 wrote to memory of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82
PID 2280 wrote to memory of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82
PID 2280 wrote to memory of 2348	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	82
PID 2280 wrote to memory of 4220	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	85
PID 2280 wrote to memory of 4220	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	85
PID 2280 wrote to memory of 4220	2280	7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe	85
PID 4220 wrote to memory of 1832	4220	cmd.exe	87
PID 4220 wrote to memory of 1832	4220	cmd.exe	87
PID 4220 wrote to memory of 1832	4220	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe
"C:\Users\Admin\AppData\Local\Temp\7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Users\Admin\AppData\Local\Temp\7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe
  "C:\Users\Admin\AppData\Local\Temp\7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe"
  2⤵
  PID:2348
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Win Update" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4220
- - C:\Windows\SysWOW64\reg.exe
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Win Update" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7cc8c112ed99935b0a69b1ddd4fe672eaab54310b75e467ca1485b0a2e589a1c.exe"
    3⤵
    - Adds Run key to start application
    - Modifies registry key
    PID:1832

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2280-132-0x0000000074DF0000-0x00000000753A1000-memory.dmp

Filesize
5.7MB

Download
memory/2280-137-0x0000000074DF0000-0x00000000753A1000-memory.dmp

Filesize
5.7MB

Download
memory/2348-135-0x0000000000370000-0x00000000003B2000-memory.dmp

Filesize
264KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads