isrstealer | 0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282

General

Target

0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe
Size

1012KB
MD5

8807ef7bf3e5259c6ce9cb1eb168c77b
SHA1

d44898854fbacacba34f064d57c4fa88223a6747
SHA256

0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282
SHA512

756ce8d1db71e0c15c77521357b631f7ad7e79b465b3d34c9c9e7bc5d57404740c07bc0db9fea29d5b0e6131f23e41ffa9531c5e902bd8a5e611743fb74d5b66
SSDEEP

24576:Q6gh1zkTrXaiSjhbEngC8v48ZKSUL3hxG1K0gDzfTvTB0UJk4u4Qz5/CmWLX7U:rQniSjhbEgCcZKpdv9VW40zVUL

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/4180-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4180-146-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4180-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4180-156-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3704-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3704-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3704-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/3704-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3704-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3704-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3172-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3172-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3172-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3172-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3704-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3704-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3704-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3704-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3704-154-0x0000000000400000-0x000000000041F000-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-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3144 set thread context of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 4180 set thread context of 3172	4180	vbc.exe	88
PID 4180 set thread context of 3704	4180	vbc.exe	89

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4180	vbc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3144 wrote to memory of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 3144 wrote to memory of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 3144 wrote to memory of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 3144 wrote to memory of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 3144 wrote to memory of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 3144 wrote to memory of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 3144 wrote to memory of 4180	3144	0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe	87
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3172	4180	vbc.exe	88
PID 4180 wrote to memory of 3704	4180	vbc.exe	89
PID 4180 wrote to memory of 3704	4180	vbc.exe	89
PID 4180 wrote to memory of 3704	4180	vbc.exe	89
PID 4180 wrote to memory of 3704	4180	vbc.exe	89
PID 4180 wrote to memory of 3704	4180	vbc.exe	89
PID 4180 wrote to memory of 3704	4180	vbc.exe	89
PID 4180 wrote to memory of 3704	4180	vbc.exe	89
PID 4180 wrote to memory of 3704	4180	vbc.exe	89

C:\Users\Admin\AppData\Local\Temp\0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe
"C:\Users\Admin\AppData\Local\Temp\0c328b00fd4cad09fafcacfb8fa6d5c4d93368a4f4d5447761750277dc008282.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3144
- 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:4180
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\ZKXxFb6FYP.ini"
    3⤵
    PID:3172
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\3PSs2jsepE.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3704

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\ZKXxFb6FYP.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3144-133-0x0000000075320000-0x00000000758D1000-memory.dmp

Filesize
5.7MB

Download
memory/3144-132-0x0000000075320000-0x00000000758D1000-memory.dmp

Filesize
5.7MB

Download
memory/3144-139-0x0000000075320000-0x00000000758D1000-memory.dmp

Filesize
5.7MB

Download
memory/3172-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3172-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3172-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3172-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3704-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3704-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3704-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3704-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3704-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4180-146-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4180-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4180-155-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4180-156-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing