isrstealer | 631d05a691f810293ff0fc64df7d727a0c2fbd26abf93bad0b2daf8458595e4a

General

Target

70097197116270790a3824cec0567321_JaffaCakes118.exe
Size

4.8MB
MD5

70097197116270790a3824cec0567321
SHA1

d392dd04be60100240634e41ded5bc8f04378b27
SHA256

631d05a691f810293ff0fc64df7d727a0c2fbd26abf93bad0b2daf8458595e4a
SHA512

965693b1a33008c8c334e0b841fdeea10df80de2e088ca68685078662ce2e7a621038ac463055cf02db5d9fc65d22da88b2b4c56ef64dd2917c8922ce07be2c1
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

Processes:

resource	yara_rule
behavioral1/memory/2752-8-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2752-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2752-24-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2752-28-0x0000000000400000-0x0000000000435000-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

Processes:

cmd.exe

pid process

1872 cmd.exe

pid	process
1872	cmd.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2308-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2308-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2308-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2308-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2308-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

Processes:

70097197116270790a3824cec0567321_JaffaCakes118.exevbc.exe

description	pid	process	target process
PID 2144 set thread context of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2752 set thread context of 2308	2752	vbc.exe	vbc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

Processes:

vbc.exevbc.execmd.exePING.EXE70097197116270790a3824cec0567321_JaffaCakes118.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
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	70097197116270790a3824cec0567321_JaffaCakes118.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

Processes:

cmd.exePING.EXE

pid process

1872 cmd.exe
948 PING.EXE
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

948 PING.EXE
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

2752 vbc.exe

pid	process
1872	cmd.exe
948	PING.EXE

pid	process
948	PING.EXE

pid	process
2752	vbc.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

70097197116270790a3824cec0567321_JaffaCakes118.exevbc.execmd.exe

description	pid	process	target process
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2144 wrote to memory of 2752	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2752 wrote to memory of 2308	2752	vbc.exe	vbc.exe
PID 2144 wrote to memory of 1872	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	cmd.exe
PID 2144 wrote to memory of 1872	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	cmd.exe
PID 2144 wrote to memory of 1872	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	cmd.exe
PID 2144 wrote to memory of 1872	2144	70097197116270790a3824cec0567321_JaffaCakes118.exe	cmd.exe
PID 1872 wrote to memory of 948	1872	cmd.exe	PING.EXE
PID 1872 wrote to memory of 948	1872	cmd.exe	PING.EXE
PID 1872 wrote to memory of 948	1872	cmd.exe	PING.EXE
PID 1872 wrote to memory of 948	1872	cmd.exe	PING.EXE

C:\Users\Admin\AppData\Local\Temp\70097197116270790a3824cec0567321_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\70097197116270790a3824cec0567321_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2144
- 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:2752
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Y8vNBFinrh.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2308
- 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\70097197116270790a3824cec0567321_JaffaCakes118.exe"
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1872
- - 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:948

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 Information Discovery

1

T1082

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\Y8vNBFinrh.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2144-0-0x0000000074731000-0x0000000074732000-memory.dmp

Filesize
4KB

Download
memory/2144-1-0x0000000074730000-0x0000000074CDB000-memory.dmp

Filesize
5.7MB

Download
memory/2144-2-0x0000000074730000-0x0000000074CDB000-memory.dmp

Filesize
5.7MB

Download
memory/2144-18-0x0000000074730000-0x0000000074CDB000-memory.dmp

Filesize
5.7MB

Download
memory/2308-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2308-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2308-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2308-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2308-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2308-20-0x0000000000460000-0x00000000005E1000-memory.dmp

Filesize
1.5MB

Download
memory/2752-4-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2752-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2752-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2752-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2752-8-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2752-24-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2752-28-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads