isrstealer | 563febfffb3cb85a8f5c364cb915c20bf9599b1b7d9685a6fc5e45956118a229

General

Target

352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe
Size

351KB
MD5

352e6e5d52130b67fa5a58d4d4de14c5
SHA1

b171277907865a1f7e62823fe9cad28e7b019add
SHA256

563febfffb3cb85a8f5c364cb915c20bf9599b1b7d9685a6fc5e45956118a229
SHA512

040ea7f3d220bc376900d6441539a1898d1ea7e209b5a8d18615ad0a16b1f13067f90088c10ff697527e48c70720df9c31211999b4b1277a153a09edf5010177
SSDEEP

6144:/xL3BJyWDLDvsUw8GEP3HgN2cQcKo9GeBruKC7CIeb3XkS5s724M:Zrasvv1P3Au5o9GeMb7K7Xk04

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/936-1-0x0000000000400000-0x0000000000431000-memory.dmp	family_isrstealer
behavioral2/memory/936-3-0x0000000000400000-0x0000000000431000-memory.dmp	family_isrstealer
behavioral2/memory/936-15-0x0000000000400000-0x0000000000431000-memory.dmp	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 2460 set thread context of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 936 set thread context of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1160-6-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/memory/1160-8-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/memory/1160-9-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/memory/1160-10-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/memory/1160-12-0x0000000000400000-0x0000000000454000-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	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 2460 wrote to memory of 936	2460	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	87
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88
PID 936 wrote to memory of 1160	936	352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe	88

C:\Users\Admin\AppData\Local\Temp\352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Users\Admin\AppData\Local\Temp\352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:936
- - C:\Users\Admin\AppData\Local\Temp\352e6e5d52130b67fa5a58d4d4de14c5_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\j2sS8ra73X.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1160

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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Downloads

C:\Users\Admin\AppData\Local\Temp\j2sS8ra73X.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/936-1-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/936-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/936-15-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1160-6-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1160-8-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1160-9-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1160-10-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1160-12-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2460-0-0x0000000000700000-0x0000000000704000-memory.dmp

Filesize
16KB

Download

Analysis

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