isrstealer | a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02-12-2022 17:36

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General

Target

a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
Size

910KB
MD5

db811c57db214dad46532e0635cd6dda
SHA1

fa5079599bdef98564161451ad971a532c20d15b
SHA256

a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2
SHA512

e753d056c25005dd2bc20a977240a7479b667000ab452b628e92ba6b6315f929d0183fa6170f8400d133388d14ca12d3e74fbfadbdf2fef343dfb1e622f37702
SSDEEP

24576:yppWKKEKzqntnhEMGgVz0MlYBHu6nSCdrvk:41KEKYtnhTpIu6p

Score

10^/10

isrstealer 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 2 IoCs

resource	yara_rule
behavioral2/memory/852-135-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/852-138-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3056-146-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3056-152-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3056-156-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 5 IoCs

resource	yara_rule
behavioral2/memory/3056-146-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3056-152-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/176-155-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3056-156-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/176-157-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/176-149-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/176-154-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/176-155-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/176-157-0x0000000000400000-0x0000000000426000-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

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4884 set thread context of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 852 set thread context of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 2828 set thread context of 3056	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	84
PID 2828 set thread context of 176	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	85

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 10 IoCs

pid	Process
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
176	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
176	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
Token: SeDebugPrivilege	176	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 4884 wrote to memory of 852	4884	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	82
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 852 wrote to memory of 2828	852	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	83
PID 2828 wrote to memory of 3056	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	84
PID 2828 wrote to memory of 3056	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	84
PID 2828 wrote to memory of 3056	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	84
PID 2828 wrote to memory of 3056	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	84
PID 2828 wrote to memory of 3056	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	84
PID 2828 wrote to memory of 176	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	85
PID 2828 wrote to memory of 176	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	85
PID 2828 wrote to memory of 176	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	85
PID 2828 wrote to memory of 176	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	85
PID 2828 wrote to memory of 176	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	85
PID 2828 wrote to memory of 224	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	86
PID 2828 wrote to memory of 224	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	86
PID 2828 wrote to memory of 224	2828	a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe	86

C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
"C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4884
- C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
  C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:852
- - C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
    "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2828
  - - C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
      "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:3056
  - - C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
      "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:176
  - - C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
      "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      PID:224

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/176-157-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/176-155-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/176-154-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/176-149-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/852-135-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/852-138-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2828-153-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2828-144-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2828-143-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2828-142-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/3056-146-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3056-152-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3056-156-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4884-132-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/4884-137-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/4884-133-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download