isrstealer | 7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f

General

Target

7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
Size

624KB
MD5

a6fc40105117a5663929134ace126bab
SHA1

92448ef679c4bd601b20c9efb1afc3ebfd6dd5bc
SHA256

7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f
SHA512

cfbce633174f2b92c5e348b9a7477ba132befd82343b99090cd0d502ba1d774b25facbb131de1e692bd4b623dc4258f0b4b1cef90a1a113a8aa0a97211675794
SSDEEP

12288:teO2NPnq1aOX5gfIRD2oZAaN7CANofcwrxBieAjgy7FJaGaY/mXO:tGxp254uLzIF0wrX9OxJam/me

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 5 IoCs

resource	yara_rule
behavioral2/memory/2000-134-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/2000-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2000-145-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2000-154-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2000-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3916-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3916-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3916-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/3916-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3916-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3916-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4284-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4284-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4284-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4284-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3916-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3916-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3916-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3916-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3916-153-0x0000000000400000-0x000000000041F000-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-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3296 set thread context of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 2000 set thread context of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 set thread context of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 3296 wrote to memory of 2000	3296	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	83
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 4284	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	84
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85
PID 2000 wrote to memory of 3916	2000	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	85

C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
"C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3296
- C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
  "C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2000
- - C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\5AxwbblGa9.ini"
    3⤵
    PID:4284
- - C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Eh0yZi6UuM.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

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\5AxwbblGa9.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2000-145-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2000-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2000-155-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2000-154-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3916-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3916-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3916-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3916-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3916-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4284-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4284-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4284-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4284-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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