isrstealer | 2cc663da8e0285ff4c676d78eda9ead72f41d0447d5876fcba620e12c98aba17

General

Target

a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe
Size

4.9MB
MD5

a0a2813cd5ba138f7758d98a37635694
SHA1

6e1d29b7d8b17bbb8b90be866796114dee654de7
SHA256

2cc663da8e0285ff4c676d78eda9ead72f41d0447d5876fcba620e12c98aba17
SHA512

20fc7bb9757a9a9fa6118512d80857c7ec09326eacf70dc0ab124f6644ce1ebc77e70b81037562da2d00a85f17ab71b0e56d5f4d15ba290b9bb45ccad8896b19
SSDEEP

6144:7/m9kF4LhB959Ak24Fa8yVRasuSuvfQ1dskAsaJraBCDorAB:bfFWB9bpFatVMPfgsVpraB

Score

10^/10

isrstealer credential_access discovery 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/2824-11-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2824-7-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2824-26-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2824-31-0x0000000000400000-0x0000000000435000-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

Deletes itself 1 IoCs

pid	Process
2684	cmd.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2864-20-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2864-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2864-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2864-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2864-24-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2292 set thread context of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2824 set thread context of 2864	2824	vbc.exe	31

System Location Discovery: System Language Discovery 1 TTPs 5 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2860	PING.EXE
2684	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2860	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2824	vbc.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2292 wrote to memory of 2824	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	30
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2824 wrote to memory of 2864	2824	vbc.exe	31
PID 2292 wrote to memory of 2684	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	32
PID 2292 wrote to memory of 2684	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	32
PID 2292 wrote to memory of 2684	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	32
PID 2292 wrote to memory of 2684	2292	a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe	32
PID 2684 wrote to memory of 2860	2684	cmd.exe	34
PID 2684 wrote to memory of 2860	2684	cmd.exe	34
PID 2684 wrote to memory of 2860	2684	cmd.exe	34
PID 2684 wrote to memory of 2860	2684	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2824
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\0XSYON6Pmi.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C ping 1.1.1.1 -n 1 -w 1000 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\a0a2813cd5ba138f7758d98a37635694_JaffaCakes118.exe"
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Discovery

Remote System Discovery

1

T1018

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\0XSYON6Pmi.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2292-21-0x0000000074CF0000-0x000000007529B000-memory.dmp

Filesize
5.7MB

Download
memory/2292-0-0x0000000074CF1000-0x0000000074CF2000-memory.dmp

Filesize
4KB

Download
memory/2292-1-0x0000000074CF0000-0x000000007529B000-memory.dmp

Filesize
5.7MB

Download
memory/2292-2-0x0000000074CF0000-0x000000007529B000-memory.dmp

Filesize
5.7MB

Download
memory/2824-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2824-7-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-11-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-4-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-26-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-31-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-29-0x0000000000440000-0x000000000051F000-memory.dmp

Filesize
892KB

Download
memory/2864-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2864-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2864-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2864-24-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2864-20-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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