isrstealer | 2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380

General

Target

2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
Size

1.7MB
MD5

9068cdecf8eb0c742708d88e3a4094ec
SHA1

c1132523dc959449f444e337c62d96dfd7f8ebb6
SHA256

2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380
SHA512

d7793a3ea008023bc25a4c6485e4178aae9f95fbf367c5044a939e9356c8911e9309c99c643b7566f5d426cc9b99d05f11f4aba71447afedd35e474558af4745
SSDEEP

24576:DRmJkcoQricOIQxiZY1iaWQ6h8Q/7fBQFKr0iiH0sUyNHtv4au9VicGrovOLDB3K:wJZoQrbTFZY1ia94BpxiH00vACLL9O3L

Score

10^/10

isrstealer collection persistence 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 4 IoCs

resource	yara_rule
behavioral2/memory/4124-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4124-142-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4124-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4124-153-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/176-146-0x0000000000000000-mapping.dmp	MailPassView
behavioral2/memory/176-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/176-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/176-146-0x0000000000000000-mapping.dmp	Nirsoft
behavioral2/memory/176-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/176-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4960-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4960-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4960-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4960-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4960-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/176-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/176-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/176-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/176-151-0x0000000000400000-0x000000000041F000-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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe"	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2140 set thread context of 4124	2140	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	79
PID 4124 set thread context of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 set thread context of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\som.settings	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
File opened for modification	C:\Windows\som.settings	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2140 wrote to memory of 4124	2140	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	79
PID 2140 wrote to memory of 4124	2140	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	79
PID 2140 wrote to memory of 4124	2140	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	79
PID 2140 wrote to memory of 4124	2140	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	79
PID 2140 wrote to memory of 4124	2140	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	79
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 4960	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	80
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85
PID 4124 wrote to memory of 176	4124	2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe	85

C:\Users\Admin\AppData\Local\Temp\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
"C:\Users\Admin\AppData\Local\Temp\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Users\Admin\AppData\Local\Temp\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
  C:\Users\Admin\AppData\Local\Temp\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4124
- - C:\Users\Admin\AppData\Local\Temp\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\9VKZNKVKVv.ini"
    3⤵
    PID:4960
- - C:\Users\Admin\AppData\Local\Temp\2b0869ed13928d6b584dbefa2e15faa1fd377f93d4ef31a187e468ca432a6380.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\iiaIK8iySd.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:176

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\9VKZNKVKVv.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/176-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/176-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/176-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/176-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4124-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4124-153-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4124-152-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4124-142-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4960-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4960-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4960-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4960-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4960-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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