isrstealer | 348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7

General

Target

348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
Size

492KB
MD5

21180ba0d386f9b0ccb0ca37b61153c4
SHA1

29c622c71036b432c575ea960ead18e19b484d9e
SHA256

348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7
SHA512

505370aaee0ca0a943ac4cd6a52c94ae94741995ea1d1c2951735041b3007e37b0e9368bee60c751e1cf25c5d73df612f5d15e8e58ba12de376997bae0624e42
SSDEEP

12288:/knms/dM9gz8NRRIaV3GhQxHNcmdqG8Doj64:/knm2wZxgQxHqm8Ggoj64

Score

10^/10

isrstealer collection discovery 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/2644-9-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2644-5-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2644-22-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2644-31-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 2 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/memory/2560-27-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2560-30-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2560-27-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2560-30-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2400 set thread context of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2644 set thread context of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 set thread context of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2984-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2984-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2984-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2984-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2984-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2560-25-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2560-26-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2560-27-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2560-30-0x0000000000400000-0x000000000041F000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
Token: SeIncBasePriorityPrivilege	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2400 wrote to memory of 2644	2400	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	30
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2984	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	31
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33
PID 2644 wrote to memory of 2560	2644	348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe	33

C:\Users\Admin\AppData\Local\Temp\348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
"C:\Users\Admin\AppData\Local\Temp\348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Users\Admin\AppData\Local\Temp\348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
  "C:\Users\Admin\AppData\Local\Temp\348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2644
- - C:\Users\Admin\AppData\Local\Temp\348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\0zg65HUxxe.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2984
- - C:\Users\Admin\AppData\Local\Temp\348e41e753d39d03a43ce763b65cab77813c954ad17a7741d729372d2fdb59a7.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\kxw4ah6a9t.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

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\0zg65HUxxe.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2400-6-0x0000000000380000-0x00000000003D5000-memory.dmp

Filesize
340KB

Download
memory/2560-30-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2560-27-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2560-26-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2560-25-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2644-22-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2644-0-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2644-3-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2644-5-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2644-7-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2644-9-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2644-31-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2984-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2984-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2984-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2984-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2984-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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