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 4 IoCs

resource	yara_rule
behavioral1/memory/2196-13-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2196-10-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2196-35-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2196-52-0x0000000000400000-0x0000000000435000-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
2196	Service.exe
2404	Service.exe

Loads dropped DLL 2 IoCs

pid	Process
3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe
2196	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
behavioral1/memory/2404-21-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2404-28-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2404-26-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2404-25-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2404-33-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3008 set thread context of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 2196 set thread context of 2404	2196	Service.exe	32

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

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	Service.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	Service.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2196	Service.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 3008 wrote to memory of 2196	3008	c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe	31
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32
PID 2196 wrote to memory of 2404	2196	Service.exe	32

C:\Users\Admin\AppData\Local\Temp\c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c6906c96dff316f1a2525980ccad5fdd_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Users\Admin\AppData\Local\Temp\plugtemp\Service.exe
  C:\Users\Admin\AppData\Local\Temp\\plugtemp\Service.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Modifies system certificate store
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Users\Admin\AppData\Local\Temp\plugtemp\Service.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\IPeYZKndzI.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

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\IPeYZKndzI.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
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/2196-52-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2196-35-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2196-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2196-13-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2196-10-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2196-9-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2196-8-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2404-28-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2404-26-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2404-25-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2404-33-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2404-21-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3008-0-0x0000000074F91000-0x0000000074F92000-memory.dmp

Filesize
4KB

Download
memory/3008-27-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/3008-29-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/3008-30-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/3008-2-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/3008-1-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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