isrstealer | cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f

General

Target

cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
Size

351KB
MD5

5f94e0e184d6bd6fcf78fc180d31f2b4
SHA1

91ee2ea48262f151d711533f04b21d8e3d1447d2
SHA256

cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f
SHA512

299700b4c89c682cd806bf23f1ed11646518f0a8d5de354bf743d66c4b86a2456fa109c9fff90accdb90890fdd4467f4e2c93fcba4c248ef6cf232679bbcc4e5
SSDEEP

6144:j0HhrcbsYJOZpgg5XhMFBMXmXdiH8ZeW2Snzl+QYpAuWV8c:jGhQbshZ1rJmS8QWZRYpAT2c

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 6 IoCs

resource	yara_rule
behavioral1/memory/1996-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1996-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1996-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1996-75-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1996-80-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1996-89-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1880-86-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1880-87-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1880-88-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/1880-86-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1880-87-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1880-88-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/956-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/956-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1880-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1880-85-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1880-86-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1880-87-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1880-88-0x0000000000400000-0x000000000041F000-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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1604 set thread context of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1996 set thread context of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 set thread context of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1604 wrote to memory of 1996	1604	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	27
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 956	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	28
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31
PID 1996 wrote to memory of 1880	1996	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	31

C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
"C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
  "C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1996
- - C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\rsjr0x8wAR.ini"
    3⤵
    PID:956
- - C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\TdGyFbmSxM.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1880

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\rsjr0x8wAR.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/956-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/956-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1604-55-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/1604-56-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/1604-54-0x0000000075601000-0x0000000075603000-memory.dmp

Filesize
8KB

Download
memory/1604-65-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/1880-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1880-88-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1880-87-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1880-86-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1880-85-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1996-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1996-80-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1996-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1996-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1996-75-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1996-89-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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