isrstealer | dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65

General

Target

dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe
Size

1008KB
MD5

d0d9e35c7366d20c4e2996600b5e32fb
SHA1

b4f2b3bbffc7be2d643c3977c7ca864eed6ceb86
SHA256

dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65
SHA512

7b0278294f08787fda49b366a535ba0bb9fd3a213d70b2afa6e03746e226a14602c02a13d2e275b9337187ecb31579e49067c6b5378c9b03a2b7f75586d854cf
SSDEEP

24576:NP3tMh0BxZC6AXPtWskmkNbY1XQXUpTfkDXfJH:R3tMh0k7PPkmPAMjkzB

Score

10^/10

isrstealer collection 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/2044-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2044-146-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2044-148-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/2044-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3424-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3424-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/3424-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3424-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3740-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3740-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3740-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3740-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3424-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3424-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3424-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3424-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4384 set thread context of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 2044 set thread context of 3740	2044	vbc.exe	85
PID 2044 set thread context of 3424	2044	vbc.exe	86

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2044	vbc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4384 wrote to memory of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 4384 wrote to memory of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 4384 wrote to memory of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 4384 wrote to memory of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 4384 wrote to memory of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 4384 wrote to memory of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 4384 wrote to memory of 2044	4384	dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe	84
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3740	2044	vbc.exe	85
PID 2044 wrote to memory of 3424	2044	vbc.exe	86
PID 2044 wrote to memory of 3424	2044	vbc.exe	86
PID 2044 wrote to memory of 3424	2044	vbc.exe	86
PID 2044 wrote to memory of 3424	2044	vbc.exe	86
PID 2044 wrote to memory of 3424	2044	vbc.exe	86
PID 2044 wrote to memory of 3424	2044	vbc.exe	86
PID 2044 wrote to memory of 3424	2044	vbc.exe	86
PID 2044 wrote to memory of 3424	2044	vbc.exe	86

C:\Users\Admin\AppData\Local\Temp\dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe
"C:\Users\Admin\AppData\Local\Temp\dd42fa589c17688c69afb046241371cec15b8049aa06c53b0f27acc5af727c65.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4384
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2044
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\evFHwavUjB.ini"
    3⤵
    PID:3740
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\bEX1YP71OV.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3424

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2044-155-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2044-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2044-148-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2044-146-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3424-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3424-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3424-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3424-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3740-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3740-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3740-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3740-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4384-132-0x0000000075580000-0x0000000075B31000-memory.dmp

Filesize
5.7MB

Download
memory/4384-140-0x0000000075580000-0x0000000075B31000-memory.dmp

Filesize
5.7MB

Download
memory/4384-133-0x0000000075580000-0x0000000075B31000-memory.dmp

Filesize
5.7MB

Download

Analysis

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