isrstealer | d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56

General

Target

d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe
Size

354KB
MD5

b2ec0902adba3b24f3131e158e1ba8a0
SHA1

7251fc7a660ea55e91075c4ded01dd7281454924
SHA256

d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56
SHA512

91f43c8121a0a19703bcfb281b4c21f8075c15efc439b99d44e72755e06337a84f5ebd4e63623af48bbc45e4a7ccffbe0cc6913798a272da63e195d74a2412ea
SSDEEP

6144:o5Iq92w/FkXj4YigClM7pSXtQW6q8fPLkFqqmdkh8uQ549rn3p8l0:oNNeT4UCKpS9QU8wFqsLl998l

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 4 IoCs

resource	yara_rule
behavioral1/memory/1504-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1504-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1504-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1504-69-0x0000000000401000-0x0000000000408000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1876-86-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1876-87-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1876-86-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1876-87-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/892-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/892-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/892-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/892-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/892-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1876-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1876-85-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1876-86-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1876-87-0x0000000000400000-0x000000000041F000-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-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1420 set thread context of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1504 set thread context of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 set thread context of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1420 wrote to memory of 1504	1420	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	28
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 892	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	29
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32
PID 1504 wrote to memory of 1876	1504	d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe	32

C:\Users\Admin\AppData\Local\Temp\d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe
"C:\Users\Admin\AppData\Local\Temp\d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1420
- C:\Users\Admin\AppData\Local\Temp\d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe
  C:\Users\Admin\AppData\Local\Temp\d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1504
- - C:\Users\Admin\AppData\Local\Temp\d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Z6ujHVLgqm.ini"
    3⤵
    PID:892
- - C:\Users\Admin\AppData\Local\Temp\d1ae621a5ae448b701a5851ceed40a62af5182e38ebf806ee771cb3f2f272f56.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\VOR0MalZJ8.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1876

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Z6ujHVLgqm.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/892-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/892-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/892-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/892-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/892-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1420-55-0x0000000074F70000-0x000000007551B000-memory.dmp

Filesize
5.7MB

Download
memory/1420-56-0x00000000002B0000-0x00000000002F0000-memory.dmp

Filesize
256KB

Download
memory/1420-54-0x00000000767B1000-0x00000000767B3000-memory.dmp

Filesize
8KB

Download
memory/1420-65-0x0000000074F70000-0x000000007551B000-memory.dmp

Filesize
5.7MB

Download
memory/1420-67-0x0000000074F70000-0x000000007551B000-memory.dmp

Filesize
5.7MB

Download
memory/1504-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1504-69-0x0000000000401000-0x0000000000408000-memory.dmp

Filesize
28KB

Download
memory/1504-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1504-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1504-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1876-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1876-85-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1876-86-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1876-87-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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