isrstealer | 09abaa1b12ae6d7ed845027756e8852a39ac0a75fecf53f76c08ce48bdf58b91

Analysis

max time kernel
42s
max time network
104s
platform
windows7_x64
resource
win7v20201028
submitted
16-11-2020 13:12

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General

Target

IMPORT-BOOKING DETAILS.xls.bit.exe
Size

942KB
MD5

056347ef33d8723e7fe77e03809ea6a8
SHA1

fd00800bb7f4a0499742eb5ee71427fdef5e0592
SHA256

09abaa1b12ae6d7ed845027756e8852a39ac0a75fecf53f76c08ce48bdf58b91
SHA512

10eb88ef51562bad7664e2ab7fd1da5eeaea8a2c1e3a70fe61cc83c4dfa8bff2e7389c719cb4ad443ed3fba43e5cd7a87391b041c08f7e58f4dce8781d0e552e

Score

10^/10

isrstealer 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 2 IoCs

resource	yara_rule
behavioral1/memory/1288-3-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1288-4-0x0000000000401180-mapping.dmp	family_isrstealer

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/524-17-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral1/memory/524-17-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1972-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1972-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1972-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/524-14-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/524-16-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/524-17-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\...................vbs	notepad.exe

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

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1032 set thread context of 1288	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	27
PID 1288 set thread context of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 set thread context of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	IMPORT-BOOKING DETAILS.xls.bit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	IMPORT-BOOKING DETAILS.xls.bit.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1032	IMPORT-BOOKING DETAILS.xls.bit.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1032	IMPORT-BOOKING DETAILS.xls.bit.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1288	IMPORT-BOOKING DETAILS.xls.bit.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 1200	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	26
PID 1032 wrote to memory of 1200	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	26
PID 1032 wrote to memory of 1200	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	26
PID 1032 wrote to memory of 1200	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	26
PID 1032 wrote to memory of 1200	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	26
PID 1032 wrote to memory of 1200	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	26
PID 1032 wrote to memory of 1288	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	27
PID 1032 wrote to memory of 1288	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	27
PID 1032 wrote to memory of 1288	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	27
PID 1032 wrote to memory of 1288	1032	IMPORT-BOOKING DETAILS.xls.bit.exe	27
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 1972	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	28
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34
PID 1288 wrote to memory of 524	1288	IMPORT-BOOKING DETAILS.xls.bit.exe	34

C:\Users\Admin\AppData\Local\Temp\IMPORT-BOOKING DETAILS.xls.bit.exe
"C:\Users\Admin\AppData\Local\Temp\IMPORT-BOOKING DETAILS.xls.bit.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Windows\SysWOW64\notepad.exe
  "C:\Windows\system32\notepad.exe"
  2⤵
  - Drops startup file
  PID:1200
- C:\Users\Admin\AppData\Local\Temp\IMPORT-BOOKING DETAILS.xls.bit.exe
  "C:\Users\Admin\AppData\Local\Temp\IMPORT-BOOKING DETAILS.xls.bit.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies system certificate store
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1288
- - C:\Users\Admin\AppData\Local\Temp\IMPORT-BOOKING DETAILS.xls.bit.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\p9LiOyXQeA.ini"
    3⤵
    PID:1972
- - C:\Users\Admin\AppData\Local\Temp\IMPORT-BOOKING DETAILS.xls.bit.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\z7fBM16fmQ.ini"
    3⤵
    PID:524

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/524-17-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/524-16-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/524-14-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1032-0-0x0000000000400000-0x00000000004F2000-memory.dmp

Filesize
968KB

Download
memory/1200-2-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/1212-13-0x000007FEF6380000-0x000007FEF65FA000-memory.dmp

Filesize
2.5MB

Download
memory/1288-3-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1972-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1972-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1972-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download