isrstealer | dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5

General

Target

dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
Size

1015KB
MD5

eeaad0018cda28981b2459b48280f8ee
SHA1

12b7929a92a899c4f89ba036875838fc31bcb120
SHA256

dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5
SHA512

b925a80136d32fcd48b995da701c51c8d2acc26470b5ea0822826eb6cbaa43d6a33a6ec1bfeafc14f655b7c8631acb1b59b3acb8525b240daedf19447a67e0d3
SSDEEP

12288:uaWzgMg7v3qnCiMErQohh0F4CCJ8lny/Qg8r69oGE15jSsFZyoopBWCD+z:ZaHMv6Corjqny/QgSsoRNFZyo5C2

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/1308-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1308-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1308-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1308-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1308-82-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1308-83-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1212-80-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1212-81-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1212-80-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1212-81-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/604-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/604-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/604-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/604-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/604-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1212-75-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1212-79-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1212-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1212-81-0x0000000000400000-0x000000000041F000-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	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 780 set thread context of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 1308 set thread context of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 set thread context of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.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
780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 780 wrote to memory of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 780 wrote to memory of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 780 wrote to memory of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 780 wrote to memory of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 780 wrote to memory of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 780 wrote to memory of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 780 wrote to memory of 1308	780	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	28
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 604	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	29
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30
PID 1308 wrote to memory of 1212	1308	dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe	30

C:\Users\Admin\AppData\Local\Temp\dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
"C:\Users\Admin\AppData\Local\Temp\dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:780
- C:\Users\Admin\AppData\Local\Temp\dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
  "C:\Users\Admin\AppData\Local\Temp\dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1308
- - C:\Users\Admin\AppData\Local\Temp\dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\7RzDfn4j1E.ini"
    3⤵
    PID:604
- - C:\Users\Admin\AppData\Local\Temp\dec3a084d5781efaece6ac3a4bfc9ecbf42f76e92602b618ecd50b1886b035d5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\sRrAgIfnuT.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1212

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\7RzDfn4j1E.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/604-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/604-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/604-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/604-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/604-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/780-54-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/1212-75-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1212-79-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1212-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1212-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1308-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1308-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1308-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1308-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1308-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1308-82-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1308-83-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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