isrstealer | 10448b62b88d14b89c991cdf0a16df16b6b2093d150b17a525695c6586a867ff

General

Target
JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
Size 260KB
Sample250104-wbc88a1rhl
SHA256 10448b62b88d14b89c991cdf0a16df16b6b2093d150b17a525695c6586a867ff
MD5 7afc6d24be8597a755b2c186042e1274
SHA1 11486e29324e2c66f7f5881f4579fd94142b1bdc
SHA512 2baac267f63317d29e1f769217676386977f02db164b82982f31362648ae5693032cacbe5d9bb665d4a7b2bb596266de5091a4130543a9f0df0d4f2675431ae3
SSDEEP 6144:sQaebYyFI08UsCpCqVu4eqsIIJ3aKl06pZoZ4Tv2QxQWnaJptxAco:JcIg3a36vY4TeQxjnexAc
MD5 SHA1 SHA512 SSDEEP

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 3 IoCs

resource	yara_rule
behavioral2/memory/3220-2-0x0000000000400000-0x0000000000434000-memory.dmp	family_isrstealer
behavioral2/memory/3220-4-0x0000000000400000-0x0000000000434000-memory.dmp	family_isrstealer
behavioral2/memory/3220-16-0x0000000000400000-0x0000000000434000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4332 set thread context of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 3220 set thread context of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3208-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3208-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3208-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3208-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3208-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 4332 wrote to memory of 3220	4332	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	82
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83
PID 3220 wrote to memory of 3208	3220	JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe	83

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4332
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3220
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7afc6d24be8597a755b2c186042e1274.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3208

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

1

T1005

Command and Control

Exfiltration

Impact

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tmp.ini

Path C:\Users\Admin\AppData\Local\Temp\tmp.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

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memory/3208-7-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3208-9-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3208-11-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3208-10-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3208-13-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/3220-2-0x0000000000400000-0x0000000000434000-memory.dmp

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memory/3220-4-0x0000000000400000-0x0000000000434000-memory.dmp

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memory/3220-16-0x0000000000400000-0x0000000000434000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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