isrstealer | ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88

Analysis

max time kernel
101s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29/10/2022, 15:37

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General

Target
ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
Size 2.0MB
Sample221029-s2l29scfb9
SHA256 ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88
MD5 8fb2caac8887a8538ca73db1c29d82e4
SHA1 f5e346a81a009cee885fbb49a195b1963e820da4
SHA512 d44cc65ddea17316de8c84e8c90bb6024c66b8f1b3646ae3ec1c68ef5cecf7c4a5210a3a99676e36d3b799d0ec0659f949b3ad01667ecc058897f3a10c2f42c7
SSDEEP 49152:FSVaOWFkkkE5Xmw3tZwiopdKIEilfUya2iuFXmUT:FS8bkbEXvjyK18darulm2
MD5 SHA1 SHA512 SSDEEP

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
behavioral2/memory/4308-134-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4308-158-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4308-166-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/336-157-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/336-161-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/336-164-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4324-144-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4324-148-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4324-160-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4324-162-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 10 IoCs

resource	yara_rule
behavioral2/memory/4324-144-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4324-148-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3296-153-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/336-157-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3296-159-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4324-160-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/336-161-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4324-162-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3296-163-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/336-164-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3372-132-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral2/memory/3372-136-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral2/memory/3296-147-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3296-150-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/336-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3296-153-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/336-156-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/336-157-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3296-159-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/336-161-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3296-163-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/336-164-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/3372-136-0x0000000000400000-0x00000000004E5000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 3372 set thread context of 4308	3372	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	83
PID 4308 set thread context of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 1880 set thread context of 4324	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	85
PID 1880 set thread context of 3296	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	86
PID 1880 set thread context of 336	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	87

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3296	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
3296	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3296	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 3372 wrote to memory of 4308	3372	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	83
PID 3372 wrote to memory of 4308	3372	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	83
PID 3372 wrote to memory of 4308	3372	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	83
PID 3372 wrote to memory of 4308	3372	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	83
PID 3372 wrote to memory of 4308	3372	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	83
PID 3372 wrote to memory of 4308	3372	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	83
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 4308 wrote to memory of 1880	4308	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	84
PID 1880 wrote to memory of 4324	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	85
PID 1880 wrote to memory of 4324	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	85
PID 1880 wrote to memory of 4324	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	85
PID 1880 wrote to memory of 4324	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	85
PID 1880 wrote to memory of 4324	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	85
PID 1880 wrote to memory of 3296	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	86
PID 1880 wrote to memory of 3296	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	86
PID 1880 wrote to memory of 3296	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	86
PID 1880 wrote to memory of 3296	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	86
PID 1880 wrote to memory of 3296	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	86
PID 1880 wrote to memory of 336	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	87
PID 1880 wrote to memory of 336	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	87
PID 1880 wrote to memory of 336	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	87
PID 1880 wrote to memory of 336	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	87
PID 1880 wrote to memory of 336	1880	ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe	87

C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
"C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3372
- C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
  "C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4308
- - C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
    "C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1880
  - - C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
      "C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:4324
  - - C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
      "C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3296
  - - C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe
      "C:\Users\Admin\AppData\Local\Temp\ffbef07bb7886bc1d708308a9c28f9ce1344088e842500196654e948f20dbc88.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      PID:336

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

data.dmp

Path C:\Users\Admin\AppData\Local\Temp\data.dmp
Size 54B
SHA256 0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e
MD5 c10dbeca73f8835240e08e4511284b83
SHA1 0032f8f941cc07768189ca6ba32b1beede6b6917
SHA512 34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967
MD5 SHA1 SHA512

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memory/336-164-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/336-161-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/336-157-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/336-156-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/336-152-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1880-140-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1880-141-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1880-142-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1880-154-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/3296-150-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/3296-159-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/3296-163-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/3296-147-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/3296-153-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/3372-136-0x0000000000400000-0x00000000004E5000-memory.dmp

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memory/3372-132-0x0000000000400000-0x00000000004E5000-memory.dmp

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memory/4308-158-0x0000000000400000-0x0000000000470000-memory.dmp

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memory/4308-134-0x0000000000400000-0x0000000000470000-memory.dmp

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memory/4308-166-0x0000000000400000-0x0000000000470000-memory.dmp

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memory/4324-144-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/4324-148-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/4324-160-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/4324-162-0x0000000000400000-0x0000000000454000-memory.dmp

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