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 4 IoCs

resource	yara_rule
behavioral2/memory/216-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/216-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/216-145-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/216-153-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3744-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3744-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3744-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/3744-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3744-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3744-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3340-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3340-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3340-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3340-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3744-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3744-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3744-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3744-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3744-152-0x0000000000400000-0x000000000041F000-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-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1676 set thread context of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 216 set thread context of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 set thread context of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86

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
1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 1676 wrote to memory of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 1676 wrote to memory of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 1676 wrote to memory of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 1676 wrote to memory of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 1676 wrote to memory of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 1676 wrote to memory of 216	1676	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	83
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3340	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	84
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86
PID 216 wrote to memory of 3744	216	f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe	86

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:1676
- 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:216
- - C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\AlYqgzob50.ini"
    3⤵
    PID:3340
- - C:\Users\Admin\AppData\Local\Temp\f88e9104df99cf75c54e9ae5d0d05cb63a107c17b57ba2f04fb3c64ce3101f01.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\on98Jrb2v7.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3744

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\AlYqgzob50.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/216-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/216-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/216-153-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/216-145-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3340-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3340-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3340-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3340-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3744-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3744-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3744-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3744-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3744-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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