isrstealer | 69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2

General

Target

69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
Size

1.1MB
MD5

8eeed29b5c1d246aa64fb3f1ec8b0210
SHA1

7b0af1802825353100db029eb48dd186d550a7f3
SHA256

69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2
SHA512

4c1b677db9afa3bac77e312078c88a67e46b01fb0257ff1caa44dd930011d9a775d14cab40fcc5529f17efa7be61388798047baf5f8cccc59a008520ec610b76
SSDEEP

12288:/aWzgMg7v3qnCiMErQohh0F4CCJ8lny/Qo6oIRrCtOnrZsWz3OWvOnbxRi4mydaQ:iaHMv6Corjqny/Qo6D1C0SQOb/JP

Score

10^/10

isrstealer collection 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/916-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/916-141-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/916-145-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/916-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2816-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2816-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/2816-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2816-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1428-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1428-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1428-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1428-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2816-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2816-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2816-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2816-151-0x0000000000400000-0x000000000041F000-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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4140 set thread context of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 916 set thread context of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 set thread context of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90

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 FindShellTrayWindow 3 IoCs

pid	Process
4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 4140 wrote to memory of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 4140 wrote to memory of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 4140 wrote to memory of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 4140 wrote to memory of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 4140 wrote to memory of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 4140 wrote to memory of 916	4140	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	81
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 1428	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	82
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90
PID 916 wrote to memory of 2816	916	69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe	90

C:\Users\Admin\AppData\Local\Temp\69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
"C:\Users\Admin\AppData\Local\Temp\69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Users\Admin\AppData\Local\Temp\69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
  "C:\Users\Admin\AppData\Local\Temp\69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:916
- - C:\Users\Admin\AppData\Local\Temp\69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\3yKQJyFCg6.ini"
    3⤵
    PID:1428
- - C:\Users\Admin\AppData\Local\Temp\69d5a05aa7e0bb1eedf53fc77a9d5b421aada2169439652a9d2f0b6c867739d2.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\nPcmBo4jhM.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2816

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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\3yKQJyFCg6.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/916-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/916-152-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/916-145-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/916-141-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1428-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1428-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1428-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1428-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2816-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2816-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2816-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2816-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing