isrstealer | 9c2c62d4c59900ffbaa1d74d0f9694efcb20e82321646568c2fd7b2345fb3b3c

General

Target

d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe
Size

372KB
MD5

d38f179b057a7dd91cdca34db51a0c08
SHA1

ace630d040759e360c8145a2214b0152630b4b33
SHA256

9c2c62d4c59900ffbaa1d74d0f9694efcb20e82321646568c2fd7b2345fb3b3c
SHA512

a7bead564fd4b945b02560c7b60b67b1c88f99231d0706de9db04693a0ecd2ed9d8b95c06cf246c1cbf8c1c8011226b9a9421790bf5b5a7086c55294029dadf0
SSDEEP

6144:NR7/LHNoeTp1gm0rYMLOTvEBSq0w7xZ6s6igcnz/RfyhZ4TtbuIwx+BZGb0g5j:NVzdTp1gj0MLOT0SqRxo1igcz/UcTJuP

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/2916-4-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2916-8-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2916-24-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2916-26-0x0000000000400000-0x0000000000435000-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
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/1000-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1000-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2236 set thread context of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2916 set thread context of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.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	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2236 wrote to memory of 2916	2236	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	31
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32
PID 2916 wrote to memory of 1000	2916	d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe	32

C:\Users\Admin\AppData\Local\Temp\d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Users\Admin\AppData\Local\Temp\d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Users\Admin\AppData\Local\Temp\d38f179b057a7dd91cdca34db51a0c08_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Zpcuk4oqcf.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1000

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\Zpcuk4oqcf.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1000-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1000-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2916-4-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2916-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2916-8-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2916-0-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2916-2-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2916-24-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2916-26-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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