isrstealer | a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266

Analysis

max time kernel
145s
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
30-11-2022 06:19

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General

Target

a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
Size

511KB
MD5

27357af54e7d75be14a4e38ba4f3fbd0
SHA1

0722e3a0c887828268298f4ca020e610d8f1eb28
SHA256

a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266
SHA512

443d52d0f1b9073f50a421176ee044bbb7d324fe2237a8ced74d9a740d54c34ee6d099d462455f697507805633d4d829bef45b1a00536cd87c991bc3616e9bae
SSDEEP

12288:ZBEvmTCqFe9uIUmsRA/AfK+0iOihXYvS0Tk/uyyVEok:PAiFLIkAIf6iJkS0Tkuyt

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 4 IoCs

resource	yara_rule
behavioral2/memory/3488-138-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/3488-137-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/3488-161-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/3488-169-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4932-160-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4932-162-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4932-165-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4968-147-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4968-151-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4968-164-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4968-167-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 9 IoCs

resource	yara_rule
behavioral2/memory/4968-147-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4968-151-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4768-156-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4932-160-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4932-162-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4932-165-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4968-164-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4768-163-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4968-167-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4768-150-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4932-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4768-154-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4768-156-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4932-158-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4932-160-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4932-162-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4932-165-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4768-163-0x0000000000400000-0x0000000000426000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe

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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe

Suspicious use of SetThreadContext 6 IoCs

description	pid	Process	procid_target
PID 4244 set thread context of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 3212 set thread context of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3488 set thread context of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 4912 set thread context of 4968	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	85
PID 4912 set thread context of 4768	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	86
PID 4912 set thread context of 4932	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.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
4768	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
4768	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4768	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 4244 wrote to memory of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 4244 wrote to memory of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 4244 wrote to memory of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 4244 wrote to memory of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 4244 wrote to memory of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 4244 wrote to memory of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 4244 wrote to memory of 3212	4244	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	81
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3212 wrote to memory of 3488	3212	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	83
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 3488 wrote to memory of 4912	3488	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	84
PID 4912 wrote to memory of 4968	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	85
PID 4912 wrote to memory of 4968	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	85
PID 4912 wrote to memory of 4968	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	85
PID 4912 wrote to memory of 4968	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	85
PID 4912 wrote to memory of 4968	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	85
PID 4912 wrote to memory of 4768	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	86
PID 4912 wrote to memory of 4768	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	86
PID 4912 wrote to memory of 4768	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	86
PID 4912 wrote to memory of 4768	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	86
PID 4912 wrote to memory of 4768	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	86
PID 4912 wrote to memory of 4932	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	87
PID 4912 wrote to memory of 4932	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	87
PID 4912 wrote to memory of 4932	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	87
PID 4912 wrote to memory of 4932	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	87
PID 4912 wrote to memory of 4932	4912	a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe	87

C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
"C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4244
- C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
  "C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:3212
- - C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
    "C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3488
  - - C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
      "C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:4912
    - - C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
        
        "C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
        5⤵
        
        PID:4968
    - - C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
        
        "C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4768
    - - C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe
        
        "C:\Users\Admin\AppData\Local\Temp\a7795dca94bd4feb3b169329836cf0a02b1370ebc1a9870e15252e9670445266.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
        5⤵
        Accesses Microsoft Outlook accounts
        
        PID:4932

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\StrZyUjgRFEj.WsW

Filesize
2KB

MD5
baf17531c4479cd8a454b6e8a5523a8f

SHA1
15a6089b53e82e7b6a0a6888d582bf7803a32dba

SHA256
c170195468128be385a2d3b7af816101a10de8b588891c0ef74e9ad4e5581dc8

SHA512
fd9eaf65094ef5902aa45b9d6d5975e45d2f630c56cdce005ea9ab917123dfe01a4c8da46e6f3653379b3cbb2323d948e7b71c899a26dd09cac7c2ef0d9c429d

Download Submit
C:\Users\Admin\AppData\Local\Temp\StrZyUjgRFEj.WsW

Filesize
2KB

MD5
baf17531c4479cd8a454b6e8a5523a8f

SHA1
15a6089b53e82e7b6a0a6888d582bf7803a32dba

SHA256
c170195468128be385a2d3b7af816101a10de8b588891c0ef74e9ad4e5581dc8

SHA512
fd9eaf65094ef5902aa45b9d6d5975e45d2f630c56cdce005ea9ab917123dfe01a4c8da46e6f3653379b3cbb2323d948e7b71c899a26dd09cac7c2ef0d9c429d

Download Submit
C:\Users\Admin\AppData\Local\Temp\data.dmp

Filesize
54B

MD5
c10dbeca73f8835240e08e4511284b83

SHA1
0032f8f941cc07768189ca6ba32b1beede6b6917

SHA256
0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e

SHA512
34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967

Download Submit
memory/3212-134-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3212-136-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3488-169-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/3488-161-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/3488-138-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4768-154-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4768-150-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4768-163-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4768-156-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4912-145-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4912-143-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4912-144-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4912-159-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4932-160-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4932-158-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4932-162-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4932-165-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4932-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4968-164-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4968-151-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4968-167-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4968-147-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download