isrstealer | d664cca762e30803f890edf572e758f8f3df0e8a31661074691e3bc285f1cecd

General

Target

4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe
Size

4.6MB
MD5

4f31dd4f9474b196c9022db377543492
SHA1

b7e751b55be2c297b7e370878e9742f74db5ecc3
SHA256

d664cca762e30803f890edf572e758f8f3df0e8a31661074691e3bc285f1cecd
SHA512

4ac12232e5da2d784b67b1b09bf64e0a94087acaf2ef19f17382913847fa87c03da090f4d115752fae2e7a72ea7e82fc77c339b550ed2a0b617b65b609bb13e7
SSDEEP

6144:7/m9kF4LhB959Ak24Fa8yVRasuSuvfQ1dskAsaJraBCDorAB:bfFWB9bpFatVMPfgsVpraB

Score

10^/10

isrstealer 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
behavioral2/memory/3648-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3648-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3648-20-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3648-24-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\Control Panel\International\Geo\Nation	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1364-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1364-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1364-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1364-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1364-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

Processes:

4f31dd4f9474b196c9022db377543492_JaffaCakes118.exevbc.exe

description	pid	process	target process
PID 4164 set thread context of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 3648 set thread context of 1364	3648	vbc.exe	vbc.exe

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

System Information Discovery
T1082
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1904 PING.EXE
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

3648 vbc.exe

pid	process
1904	PING.EXE

pid	process
3648	vbc.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

4f31dd4f9474b196c9022db377543492_JaffaCakes118.exevbc.execmd.exe

description	pid	process	target process
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 4164 wrote to memory of 3648	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 3648 wrote to memory of 1364	3648	vbc.exe	vbc.exe
PID 4164 wrote to memory of 3076	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	cmd.exe
PID 4164 wrote to memory of 3076	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	cmd.exe
PID 4164 wrote to memory of 3076	4164	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	cmd.exe
PID 3076 wrote to memory of 1904	3076	cmd.exe	PING.EXE
PID 3076 wrote to memory of 1904	3076	cmd.exe	PING.EXE
PID 3076 wrote to memory of 1904	3076	cmd.exe	PING.EXE

C:\Users\Admin\AppData\Local\Temp\4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4164
- 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
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3648
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\8LMnk3uQKH.ini"
    3⤵
    PID:1364
- 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\4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3076
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:1904

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

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\8LMnk3uQKH.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1364-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1364-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1364-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1364-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1364-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3648-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3648-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3648-20-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3648-22-0x0000000000440000-0x0000000000509000-memory.dmp

Filesize
804KB

Download
memory/3648-24-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4164-2-0x0000000074EB0000-0x0000000075461000-memory.dmp

Filesize
5.7MB

Download
memory/4164-0-0x0000000074EB2000-0x0000000074EB3000-memory.dmp

Filesize
4KB

Download
memory/4164-18-0x0000000074EB0000-0x0000000075461000-memory.dmp

Filesize
5.7MB

Download
memory/4164-1-0x0000000074EB0000-0x0000000075461000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads