isrstealer | 334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70

General

Target

334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
Size

1.1MB
MD5

fe69e2c669e484d822beef87581390e0
SHA1

2cc7e3298c66a74555290aa36f79fa9b0d7104b6
SHA256

334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70
SHA512

b82ee68e44e04d99bf2ab3dee4e907b829bc31d2ef33fa3043ecec876143e91fc53a9311bf0bb88e8790b510988184f02c187f1aed4ae602461649efa0d2fa79
SSDEEP

12288:/aWzgMg7v3qnCiMErQohh0F4CCJ8lny/Qo6oImr69oGE15jSsFZyoopgrvsOrm:iaHMv6Corjqny/Qo6DcsoRNFZyoPsOrm

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/1860-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1860-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1860-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1860-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1860-76-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1860-85-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/620-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/620-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/620-84-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/620-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/620-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/620-84-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1840-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1840-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1840-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1840-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1840-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/620-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/620-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/620-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/620-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/620-84-0x0000000000400000-0x000000000041F000-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-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1340 set thread context of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1860 set thread context of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 set thread context of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32

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
1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1340 wrote to memory of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1340 wrote to memory of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1340 wrote to memory of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1340 wrote to memory of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1340 wrote to memory of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1340 wrote to memory of 1860	1340	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	28
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 1840	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	29
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32
PID 1860 wrote to memory of 620	1860	334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe	32

C:\Users\Admin\AppData\Local\Temp\334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
"C:\Users\Admin\AppData\Local\Temp\334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Users\Admin\AppData\Local\Temp\334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
  "C:\Users\Admin\AppData\Local\Temp\334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Users\Admin\AppData\Local\Temp\334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\0MQDc40mMp.ini"
    3⤵
    PID:1840
- - C:\Users\Admin\AppData\Local\Temp\334a7e54bc6b7c3e988aaf09b20187544b2348d18e69f08bca8d57632d812a70.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\gL6XHMyU4L.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:620

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\0MQDc40mMp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/620-84-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/620-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/620-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/620-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/620-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1340-54-0x00000000753F1000-0x00000000753F3000-memory.dmp

Filesize
8KB

Download
memory/1840-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1840-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1840-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1840-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1840-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1860-76-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1860-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1860-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1860-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1860-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1860-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1860-85-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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