isrstealer | 05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0

General

Target

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe
Size

311KB
MD5

903e424e8012d31fd6bfde2b6715a620
SHA1

ebd025a6d84e561ba262f8ce987cf16819785f7b
SHA256

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0
SHA512

bbd3406886b8685ebcba82aa0f571d21e8a359986a149e27979bee60aed7f9252dd7360d5db58ee899b3215fdb5c3e737f265a5582d8683bdf245dd188d76e45
SSDEEP

6144:nlGAxVnth2DTlanWgvj9TyaXnckaREqjf:MYVnT/WSpyacFCSf

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 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1868-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1868-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1868-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1868-74-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1868-86-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1868-87-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/1060-84-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1060-85-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1060-84-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1060-85-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/756-68-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/756-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1060-79-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1060-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1060-84-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1060-85-0x0000000000400000-0x000000000041F000-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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exevbc.exe

description	pid	process	target process
PID 1600 set thread context of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1868 set thread context of 756	1868	vbc.exe	vbc.exe
PID 1868 set thread context of 1060	1868	vbc.exe	vbc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe

description pid process

Token: SeDebugPrivilege 1600 05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1868 vbc.exe

description	pid	process
Token: SeDebugPrivilege	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe

pid	process
1868	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exevbc.exe

description	pid	process	target process
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1600 wrote to memory of 1868	1600	05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 756	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe
PID 1868 wrote to memory of 1060	1868	vbc.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe
"C:\Users\Admin\AppData\Local\Temp\05300d824d2039909a2b3bd54f570ef61df36f81d75ab421b2b723f5dd3915e0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1600

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:1868

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\ShMdoBbBap.ini"
3⤵
PID:756

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\88CoqZY0dK.ini"
3⤵
- Accesses Microsoft Outlook accounts
PID:1060

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ShMdoBbBap.ini
Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/756-68-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/756-69-0x00000000004512E0-mapping.dmp

Download
memory/1060-79-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1060-80-0x000000000041C410-mapping.dmp

Download
memory/1060-85-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1060-84-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1060-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1600-55-0x0000000074440000-0x00000000749EB000-memory.dmp

Filesize
5.7MB

Download
memory/1600-56-0x0000000074440000-0x00000000749EB000-memory.dmp

Filesize
5.7MB

Download
memory/1600-66-0x0000000074440000-0x00000000749EB000-memory.dmp

Filesize
5.7MB

Download
memory/1600-54-0x0000000076461000-0x0000000076463000-memory.dmp

Filesize
8KB

Download
memory/1868-74-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1868-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1868-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1868-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1868-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1868-63-0x0000000000401180-mapping.dmp

Download
memory/1868-86-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1868-87-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads