isrstealer | fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c

General

Target

fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
Size

1.1MB
MD5

11c20f0a2f97d615cb9ddd634c04086d
SHA1

9296c3f962e8078fd9fbfa775a688995d0fd9e25
SHA256

fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c
SHA512

57fb963592fe1f2d0fea3aeb5d93cccbdc61136cdf3b8e37fab362ce782493043f974216ade6b807a86e50e431194859768afcdf367a448ad8e3c9bc1dc1ea52
SSDEEP

12288:zH7Wcjdc/r2sxxiPGGAOOPSXDV8ClgVYhX5FSsf8Q66oIWr69oGE15jSsFZyoop3:zbCj2sObHtqQ4Q66DssoRNFZyopgX

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 6 IoCs

resource	yara_rule
behavioral1/memory/1152-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1152-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1152-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1152-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1152-83-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1152-84-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1100-81-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1100-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1100-81-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1100-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1544-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1544-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1544-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1544-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1544-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1100-76-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1100-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1100-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1100-82-0x0000000000400000-0x000000000041F000-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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1492 set thread context of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1152 set thread context of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 set thread context of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31

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
1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1492 wrote to memory of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1492 wrote to memory of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1492 wrote to memory of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1492 wrote to memory of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1492 wrote to memory of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1492 wrote to memory of 1152	1492	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	27
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1544	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	28
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31
PID 1152 wrote to memory of 1100	1152	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	31

C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
"C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
  "C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1152
- - C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\2M3SWSSYf0.ini"
    3⤵
    PID:1544
- - C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\wPOHId6Ak9.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1100

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\2M3SWSSYf0.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1100-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1100-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1100-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1100-76-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1152-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1152-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1152-84-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1152-83-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1152-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1152-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1152-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1492-54-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download
memory/1544-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1544-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1544-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1544-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1544-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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