isrstealer | 4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512

General

Target

4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe
Size

385KB
MD5

8d03ddeb4a45cc5cf864f732c098b0b6
SHA1

b1e49e2ef7991bbe5dfc659b081eee6d01e6984e
SHA256

4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512
SHA512

1f65903cee3bba83f7729d5beab07302e0d12021343578b85586704e68bf22ffe630bf6d6690ff1be8ff74b3389431a858b90d2093f4e76e42146de694c61594
SSDEEP

6144:qb7oxSwhH71/raQi87rDOzpRC/d/+hPH2mdIaWTshmQ2xJ/lyFjP0m:GoxFhh/ramnGpY/dGhPH2+WTeb

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

Processes:

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

Processes:

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

Nirsoft 2 IoCs

Processes:

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

Processes:

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

Processes:

vbc.exe

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

Processes:

4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exevbc.exe

description	pid	process	target process
PID 4208 set thread context of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 1876 set thread context of 5100	1876	vbc.exe	vbc.exe
PID 1876 set thread context of 4792	1876	vbc.exe	vbc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe

description pid process

Token: SeDebugPrivilege 4208 4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1876 vbc.exe

description	pid	process
Token: SeDebugPrivilege	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe

pid	process
1876	vbc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exevbc.exe

description	pid	process	target process
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 4208 wrote to memory of 1876	4208	4417e1a32e2bd681dd94077a12464d2d27efdc64fa219021fffa1b704eea5512.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 5100	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe
PID 1876 wrote to memory of 4792	1876	vbc.exe	vbc.exe

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

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Gi4HTLbjJX.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

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

Filesize
264KB

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

Filesize
264KB

Download
memory/1876-134-0x0000000000000000-mapping.dmp

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

Filesize
264KB

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

Filesize
264KB

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

Filesize
5.7MB

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

Filesize
5.7MB

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

Filesize
5.7MB

Download
memory/4792-149-0x0000000000000000-mapping.dmp

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

Filesize
124KB

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

Filesize
124KB

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

Filesize
124KB

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

Filesize
124KB

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

Filesize
332KB

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

Filesize
332KB

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

Filesize
332KB

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

Filesize
332KB

Download
memory/5100-140-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads