isrstealer | 2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941

General

Target

2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
Size

139KB
MD5

f76c007f2c8efa85df02e78c281d6f20
SHA1

77446ff46524daa9a7dbe3ea1091abdc10d797de
SHA256

2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941
SHA512

2ff04f72647858702591b2e451314ce4cbea245a425605d2c015ba13d23e1c83241a24bdeaad3e9347f10e1fed215369ca10548c13c4c343321c727e0980c10b
SSDEEP

3072:7oEPcB/ahiaaHa4t7J4f4ug/1vENqr5kjGnEQVVfXCGuj7IjQf:ME0B/ak6yJigNVr5Mu5DfXCFXIjQf

Score

10^/10

isrstealer 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
behavioral2/memory/4308-12-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4308-14-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4308-20-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4308-23-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2136 set thread context of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 620 set thread context of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/620-3-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/memory/620-5-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/memory/620-7-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/memory/620-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
4308	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 2136 wrote to memory of 620	2136	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	82
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83
PID 620 wrote to memory of 4308	620	2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe	83

C:\Users\Admin\AppData\Local\Temp\2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
"C:\Users\Admin\AppData\Local\Temp\2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Users\Admin\AppData\Local\Temp\2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
  C:\Users\Admin\AppData\Local\Temp\2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
  2⤵
  - Maps connected drives based on registry
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:620
- - C:\Users\Admin\AppData\Local\Temp\2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
    C:\Users\Admin\AppData\Local\Temp\2c269cf961eb60370d68757734fd5a9fdfb1ef3410fcafebf64ca02a32c51941N.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:4308

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

2

T1552

Credentials In Files

2

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/620-3-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/620-5-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/620-7-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/620-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/620-15-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/2136-0-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2136-10-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/4308-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4308-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4308-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4308-23-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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