isrstealer | 723653126eb7214b142d0e0c6689158f3acebc548a38f704e979347e2290a5cc

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
16-03-2024 12:58

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

ce1e7349486456b3c57a5266260f3393.exe
Size

1001KB
MD5

ce1e7349486456b3c57a5266260f3393
SHA1

0f48649519bf91e15b57650ba84a5a4a7da5c0ca
SHA256

723653126eb7214b142d0e0c6689158f3acebc548a38f704e979347e2290a5cc
SHA512

6c37b2cb3f1db56dc3f9139fd70456aee25ea5a50973e86b3585b4f0cba0661433ee0ae260b7d25886c5fd3fba3b6323458b16683638607e417b54b3dd5b408d
SSDEEP

24576:s6unKM3YweVE6GWmLPSaGa4pFPxHCjt2:OJ3YweDGWcSxa4pF5Hs

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 3 IoCs

resource	yara_rule
behavioral1/memory/3048-17-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/3048-21-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/3048-40-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/320-38-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/320-39-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/320-38-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/320-39-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

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
T1552.001

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2492-27-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2492-29-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2492-30-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2492-31-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2492-33-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/320-35-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/320-37-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/320-38-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/320-39-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	ce1e7349486456b3c57a5266260f3393.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2084 set thread context of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 3048 set thread context of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 set thread context of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2752	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2084	ce1e7349486456b3c57a5266260f3393.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3048	ce1e7349486456b3c57a5266260f3393.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2752	2084	ce1e7349486456b3c57a5266260f3393.exe	28
PID 2084 wrote to memory of 2752	2084	ce1e7349486456b3c57a5266260f3393.exe	28
PID 2084 wrote to memory of 2752	2084	ce1e7349486456b3c57a5266260f3393.exe	28
PID 2084 wrote to memory of 2752	2084	ce1e7349486456b3c57a5266260f3393.exe	28
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 2084 wrote to memory of 3048	2084	ce1e7349486456b3c57a5266260f3393.exe	30
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 2492	3048	ce1e7349486456b3c57a5266260f3393.exe	31
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36
PID 3048 wrote to memory of 320	3048	ce1e7349486456b3c57a5266260f3393.exe	36

C:\Users\Admin\AppData\Local\Temp\ce1e7349486456b3c57a5266260f3393.exe
"C:\Users\Admin\AppData\Local\Temp\ce1e7349486456b3c57a5266260f3393.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PdacbsPcya" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB0D8.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2752
- C:\Users\Admin\AppData\Local\Temp\ce1e7349486456b3c57a5266260f3393.exe
  "C:\Users\Admin\AppData\Local\Temp\ce1e7349486456b3c57a5266260f3393.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Users\Admin\AppData\Local\Temp\ce1e7349486456b3c57a5266260f3393.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\hKTNHaq0Kw.ini"
    3⤵
    PID:2492
- - C:\Users\Admin\AppData\Local\Temp\ce1e7349486456b3c57a5266260f3393.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\cjOMj91zUH.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\hKTNHaq0Kw.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB0D8.tmp

Filesize
1KB

MD5
71e3a5246920afd66a9b0ebc05bb4097

SHA1
7518ed4a040ccd2f6ba0313e78d4efa0c5b7f921

SHA256
50f70cfb44cf6cd28489b06dba29607006b98b13a45d5e94e43c169b0af49b67

SHA512
b08d19e3e6a6b1521259ae236bae6fd5c49ba515d30bae794890e28d2ca2c62fe96595564067a26173537f80497d4d001d9fe905dfa1280e8730631adb0f1907

Download Submit
memory/320-35-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/320-37-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/320-38-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/320-39-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2084-3-0x0000000000230000-0x0000000000248000-memory.dmp

Filesize
96KB

Download
memory/2084-7-0x0000000000A90000-0x0000000000ADE000-memory.dmp

Filesize
312KB

Download
memory/2084-6-0x0000000005750000-0x000000000580E000-memory.dmp

Filesize
760KB

Download
memory/2084-5-0x0000000004E90000-0x0000000004ED0000-memory.dmp

Filesize
256KB

Download
memory/2084-4-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-1-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-2-0x0000000004E90000-0x0000000004ED0000-memory.dmp

Filesize
256KB

Download
memory/2084-0-0x0000000000C40000-0x0000000000D40000-memory.dmp

Filesize
1024KB

Download
memory/2084-25-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/2492-31-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2492-29-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2492-30-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2492-27-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2492-33-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3048-21-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3048-19-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3048-17-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3048-15-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3048-13-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3048-40-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads