isrstealer | ccf736f7cd9a9e92db675dbb7dc1ba47ec8332c078eea343e0877184f87d7fcd

General

Target

c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe
Size

595KB
MD5

c6906c96dff316f1a2525980ccad5fdd
SHA1

9becb7009df39331a7c693c871d6e2c5bd28e805
SHA256

ccf736f7cd9a9e92db675dbb7dc1ba47ec8332c078eea343e0877184f87d7fcd
SHA512

fcebbbdd08260c8d6b47f9e614157c190bfbb8de36b59614e79708e5f5e0b9e7c75f9fecb489a2fe4b93edbb733ec4bcaa1caa738265263aa0a91ede601faf7f
SSDEEP

6144:n2VZSbjwUhFZxfEtncaHvcl1gTfy7X2dIffr0uo3Jp5w2Cc+oifzUmkRPYaC:nkGbzrW0/GOfIuK5w2zhh1RPY

Score

10^/10

isrstealer credential_access 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/4832-6-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/4832-10-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/4832-35-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Executes dropped EXE 2 IoCs

pid	Process
4832	Service.exe
1660	Service.exe

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
T1552.001

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1660-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1660-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1660-20-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1660-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1660-23-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1504 set thread context of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 4832 set thread context of 1660	4832	Service.exe	94

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	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Service.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Service.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4832	Service.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4832	1504	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	93
PID 4832 wrote to memory of 1660	4832	Service.exe	94
PID 4832 wrote to memory of 1660	4832	Service.exe	94
PID 4832 wrote to memory of 1660	4832	Service.exe	94
PID 4832 wrote to memory of 1660	4832	Service.exe	94
PID 4832 wrote to memory of 1660	4832	Service.exe	94
PID 4832 wrote to memory of 1660	4832	Service.exe	94
PID 4832 wrote to memory of 1660	4832	Service.exe	94
PID 4832 wrote to memory of 1660	4832	Service.exe	94

C:\Users\Admin\AppData\Local\Temp\c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Users\Admin\AppData\Local\Temp\plugtemp\Service.exe
  C:\Users\Admin\AppData\Local\Temp\\plugtemp\Service.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4832
- - C:\Users\Admin\AppData\Local\Temp\plugtemp\Service.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\f56gnjJnQL.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1660

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\f56gnjJnQL.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\plugtemp\Service.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/1504-15-0x0000000075552000-0x0000000075553000-memory.dmp

Filesize
4KB

Download
memory/1504-0-0x0000000075552000-0x0000000075553000-memory.dmp

Filesize
4KB

Download
memory/1504-2-0x0000000075550000-0x0000000075B01000-memory.dmp

Filesize
5.7MB

Download
memory/1504-1-0x0000000075550000-0x0000000075B01000-memory.dmp

Filesize
5.7MB

Download
memory/1504-25-0x0000000075550000-0x0000000075B01000-memory.dmp

Filesize
5.7MB

Download
memory/1504-17-0x0000000075550000-0x0000000075B01000-memory.dmp

Filesize
5.7MB

Download
memory/1660-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1660-20-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1660-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1660-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1660-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4832-6-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4832-10-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4832-34-0x0000000000440000-0x0000000000509000-memory.dmp

Filesize
804KB

Download
memory/4832-35-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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