isrstealer | 4d4e7a37101a9fa0810a3ff324a87c302a1328dcaeae6a9c637752e871a1a678

General

Target

dc35c41440704458ed7a60c0ac026f62.exe
Size

408KB
MD5

dc35c41440704458ed7a60c0ac026f62
SHA1

28459a2a602943fb5f44cb7424061c390fefb502
SHA256

4d4e7a37101a9fa0810a3ff324a87c302a1328dcaeae6a9c637752e871a1a678
SHA512

f522adf75f7915caf3a87551f4704303ddde487da920c6a2a762d4fc821f5c6749b2496cdd5b5193252eb97f01cdcc3dc77584be90e6833e32f2410b955f8081
SSDEEP

6144:v7l/Mts0sXrneChRWcSUEC8ctAom2C+do4ON1ZA0bYQpBuLGlY+6iPHS/ei:hMSeChscpEBctA2Q11aPQ3/6/ei

Score

10^/10

isrstealer 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/4236-12-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral2/memory/4572-88-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral2/memory/4236-82-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer
behavioral2/memory/4236-93-0x0000000000400000-0x0000000000459000-memory.dmp	family_isrstealer

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4396-35-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4396-40-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4396-43-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/4396-35-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4396-40-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4396-43-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4236-4-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral2/memory/4236-8-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral2/memory/5072-10-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/5072-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4236-12-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral2/memory/5072-6-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4572-88-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral2/memory/4236-82-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral2/memory/5072-83-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4236-93-0x0000000000400000-0x0000000000459000-memory.dmp	upx
behavioral2/memory/3152-95-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4044 set thread context of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 set thread context of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4044	dc35c41440704458ed7a60c0ac026f62.exe
4236	dc35c41440704458ed7a60c0ac026f62.exe
5072	dc35c41440704458ed7a60c0ac026f62.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 4236	4044	dc35c41440704458ed7a60c0ac026f62.exe	52
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51
PID 4044 wrote to memory of 5072	4044	dc35c41440704458ed7a60c0ac026f62.exe	51

C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe
"C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4044
- C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe
  "C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:5072
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\TQEQB.bat" "
    3⤵
    PID:1356
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "invidiadriver" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe" /f
      4⤵
      PID:1564
- - C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
    "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
    3⤵
    PID:412
  - - C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
      "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
      4⤵
      PID:3152
  - - C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
      "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
      4⤵
      PID:4572
- C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe
  "C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:4236

C:\Users\Admin\AppData\Local\Temp\FAKFB.exe
"C:\Users\Admin\AppData\Local\Temp\FAKFB.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
1⤵
PID:4396

C:\Users\Admin\AppData\Local\Temp\FAKFB.exe
"C:\Users\Admin\AppData\Local\Temp\FAKFB.exe"
1⤵
PID:3712

C:\Users\Admin\AppData\Local\Temp\FAKFB.exe
"C:\Users\Admin\AppData\Local\Temp\FAKFB.exe"
1⤵
PID:4304

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/412-69-0x0000000002A50000-0x0000000002A51000-memory.dmp

Filesize
4KB

Download
memory/412-70-0x0000000002A90000-0x0000000002A91000-memory.dmp

Filesize
4KB

Download
memory/3152-95-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3712-33-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/3712-31-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/3712-34-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/3712-37-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/4044-3-0x0000000002BE0000-0x0000000002BE1000-memory.dmp

Filesize
4KB

Download
memory/4044-2-0x0000000002350000-0x0000000002351000-memory.dmp

Filesize
4KB

Download
memory/4236-8-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4236-82-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4236-12-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4236-93-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4236-4-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4396-43-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4396-40-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4396-35-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4572-88-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/5072-6-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/5072-83-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/5072-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/5072-10-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

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