isrstealer | f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01

General

Target

f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
Size

1.0MB
MD5

24a555c616a2e1e144591f690e3f6a0c
SHA1

f994653839fa49c8aef18cee6d5129b0887d3059
SHA256

f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01
SHA512

2e85d1225f7f8935c880f427e99fd2fc77b0205ccc1c61585e7debb39d772c3484f6d373e2008bb97058c98a5d39b5df07a29036d8581ce3ad2b2a08d845cc69
SSDEEP

12288:TaWzgMg7v3qnCiMErQohh0F4CCJ8lny/QPO4re39oGE15jSsFZyoopSqM14C:WaHMv6Corjqny/QPOGetoRNFZyomW4C

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
behavioral1/memory/588-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/588-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/588-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/588-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/588-80-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1272-78-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1272-79-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1272-78-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1272-79-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1644-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1644-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1644-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1644-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1272-73-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1272-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1272-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1272-79-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1644-81-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1644-82-0x0000000000400000-0x0000000000453000-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-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1756 set thread context of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 588 set thread context of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 set thread context of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30

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
1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1756 wrote to memory of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 1756 wrote to memory of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 1756 wrote to memory of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 1756 wrote to memory of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 1756 wrote to memory of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 1756 wrote to memory of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 1756 wrote to memory of 588	1756	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	28
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1644	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	29
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30
PID 588 wrote to memory of 1272	588	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	30

C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
"C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1756
- C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
  "C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:588
- - C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\h9UmjJQyLE.ini"
    3⤵
    PID:1644
- - C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\fBEBGg9SZd.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1272

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

memory/588-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/588-80-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/588-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/588-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/588-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/588-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1272-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1272-79-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1272-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1272-73-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1644-82-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1644-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1644-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1644-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1644-81-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1644-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1756-54-0x00000000763A1000-0x00000000763A3000-memory.dmp

Filesize
8KB

Download

Analysis

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