isrstealer | cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d

Analysis

max time kernel
46s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
20-10-2022 22:04

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General

Target

cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe
Size

702KB
MD5

3c6dccd0d4d6efb4f1aa36a32cfb09e5
SHA1

d8aeda638137085b6ce780546e338b876af8f4dd
SHA256

cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d
SHA512

6a409ab6b08c1c58f5669b4e78909991dd5799e11137499ca6da7b5657db7a1ad8d74e06d283fe6ba12b8429e52dba3a27b5875edcead9930800118d3015ddaf
SSDEEP

6144:u88dLkR8mLoxAZNsgKiHqRmONN2j2WqAg73NfS52IpITpC:u88dLY8vxAfqirINNfQ2Q

Score

10^/10

isrstealer collection spyware 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 5 IoCs

resource	yara_rule
behavioral1/memory/1004-58-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1004-57-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1004-69-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1004-75-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1004-83-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/432-81-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/432-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/432-81-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/432-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1740-63-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1740-67-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1740-68-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1740-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1740-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1740-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/432-76-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/432-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/432-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/432-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

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	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1788 set thread context of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1004 set thread context of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 set thread context of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe
1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1788 wrote to memory of 1004	1788	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	28
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 1740	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	29
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32
PID 1004 wrote to memory of 432	1004	cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe	32

C:\Users\Admin\AppData\Local\Temp\cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe
"C:\Users\Admin\AppData\Local\Temp\cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Users\Admin\AppData\Local\Temp\cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe
  "C:\Users\Admin\AppData\Local\Temp\cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1004
- - C:\Users\Admin\AppData\Local\Temp\cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\sGGD80fGOC.ini"
    3⤵
    PID:1740
- - C:\Users\Admin\AppData\Local\Temp\cb7f9751f6380a4139e7f16d7a36d404df0100d7cb2914274473380112ae3c2d.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\l6meWrfm1z.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:432

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\sGGD80fGOC.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/432-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/432-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/432-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/432-76-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1004-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1004-83-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1004-69-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1004-75-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1740-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1740-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1740-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1740-68-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1740-67-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1740-63-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1788-56-0x0000000076321000-0x0000000076323000-memory.dmp

Filesize
8KB

Download
memory/1788-60-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download