isrstealer | 51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16

General

Target

51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe
Size

336KB
MD5

ec298132c73e3a4a55fb3f7b8d070830
SHA1

1b900fb2438b437e1cecab687f279623392a41dd
SHA256

51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16
SHA512

4741759518e310964bdf6bbd30ded231db2e333fc7299d1f209b7faf8c95a48c98f6cce30e363e6d599c32018c1fd364bd86223eaac7cddc9d24415b37b8ae61
SSDEEP

6144:jiC6ngfT4Pm1wy9hWIWCtV3/rGBP5sgDiZUM5n98506WuK2T:jhfT4GmIbt9KBP5sqS98ZWL2

Score

10^/10

isrstealer collection persistence 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
behavioral1/memory/1976-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1976-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1976-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1976-72-0x0000000000401000-0x0000000000408000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1256-78-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1256-79-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1256-80-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/1256-78-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1256-79-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1256-80-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1256-73-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1256-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1256-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1256-79-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1256-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\WinDefender = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinDefender.Exe"	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1440 set thread context of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1976 set thread context of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 set thread context of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1440 wrote to memory of 1976	1440	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	28
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 852	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	29
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30
PID 1976 wrote to memory of 1256	1976	51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe	30

C:\Users\Admin\AppData\Local\Temp\51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe
"C:\Users\Admin\AppData\Local\Temp\51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Users\Admin\AppData\Local\Temp\51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe
  C:\Users\Admin\AppData\Local\Temp\51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Users\Admin\AppData\Local\Temp\51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\6H1OC2uYe8.ini"
    3⤵
    PID:852
- - C:\Users\Admin\AppData\Local\Temp\51056e3dfe5ad18403968342a264b440f6f6e10c22d2595a94764aa636d6ee16.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\zmgAHjibb8.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1256

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1256-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1256-79-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1256-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1256-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1256-73-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1440-67-0x0000000074FB0000-0x000000007555B000-memory.dmp

Filesize
5.7MB

Download
memory/1440-54-0x0000000076181000-0x0000000076183000-memory.dmp

Filesize
8KB

Download
memory/1440-68-0x0000000000185000-0x0000000000196000-memory.dmp

Filesize
68KB

Download
memory/1440-56-0x0000000000185000-0x0000000000196000-memory.dmp

Filesize
68KB

Download
memory/1440-55-0x0000000074FB0000-0x000000007555B000-memory.dmp

Filesize
5.7MB

Download
memory/1976-72-0x0000000000401000-0x0000000000408000-memory.dmp

Filesize
28KB

Download
memory/1976-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1976-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1976-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1976-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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