isrstealer | 4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512

Analysis

max time kernel
151s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01/10/2022, 23:52

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General

Target
4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe
Size 385KB
Sample221001-3w2kwadhaj
SHA256 4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512
MD5 8d03ddeb4a45cc5cf864f732c098b0b6
SHA1 b1e49e2ef7991bbe5dfc659b081eee6d01e6984e
SHA512 1f65903cee3bba83f7729d5beab07302e0d12021343578b85586704e68bf22ffe630bf6d6690ff1be8ff74b3389431a858b90d2093f4e76e42146de694c61594
SSDEEP 6144:qb7oxSwhH71/raQi87rDOzpRC/d/+hPH2mdIaWTshmQ2xJ/lyFjP0m:GoxFhh/ramnGpY/dGhPH2+WTeb
MD5 SHA1 SHA512 SSDEEP

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/1876-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1876-146-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1876-148-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1876-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4792-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4792-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/4792-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4792-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5100-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5100-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5100-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5100-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4792-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4792-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4792-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4792-154-0x0000000000400000-0x000000000041F000-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 4208 set thread context of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 1876 set thread context of 5100	1876	vbc.exe	84
PID 1876 set thread context of 4792	1876	vbc.exe	92

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1876	vbc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	83
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 5100	1876	vbc.exe	84
PID 1876 wrote to memory of 4792	1876	vbc.exe	92
PID 1876 wrote to memory of 4792	1876	vbc.exe	92
PID 1876 wrote to memory of 4792	1876	vbc.exe	92
PID 1876 wrote to memory of 4792	1876	vbc.exe	92
PID 1876 wrote to memory of 4792	1876	vbc.exe	92
PID 1876 wrote to memory of 4792	1876	vbc.exe	92
PID 1876 wrote to memory of 4792	1876	vbc.exe	92
PID 1876 wrote to memory of 4792	1876	vbc.exe	92

C:\Users\Admin\AppData\Local\Temp\4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe
"C:\Users\Admin\AppData\Local\Temp\4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4208
- 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:1876
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Gi4HTLbjJX.ini"
    3⤵
    PID:5100
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\41Ylo4n6uf.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:4792

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

Gi4HTLbjJX.ini

Path C:\Users\Admin\AppData\Local\Temp\Gi4HTLbjJX.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

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memory/1876-146-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/1876-155-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/1876-135-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/1876-148-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/4208-137-0x0000000075340000-0x00000000758F1000-memory.dmp

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memory/4208-132-0x0000000075340000-0x00000000758F1000-memory.dmp

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memory/4208-133-0x0000000075340000-0x00000000758F1000-memory.dmp

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memory/4792-150-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4792-152-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4792-153-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4792-154-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/5100-143-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/5100-144-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/5100-145-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/5100-141-0x0000000000400000-0x0000000000453000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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