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
behavioral1/memory/2016-11-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2016-7-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2016-25-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2016-28-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Deletes itself 1 IoCs

Processes:

cmd.exe

pid	Process
2684	cmd.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1636-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1636-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1636-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1636-20-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1636-23-0x0000000000400000-0x0000000000453000-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	procid_target
PID 1700 set thread context of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 2016 set thread context of 1636	2016	vbc.exe	31

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
3060	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid	Process
2016	vbc.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

4f31dd4f9474b196c9022db377543492_JaffaCakes118.exevbc.execmd.exe

description	pid	Process	procid_target
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 1700 wrote to memory of 2016	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	30
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 2016 wrote to memory of 1636	2016	vbc.exe	31
PID 1700 wrote to memory of 2684	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	32
PID 1700 wrote to memory of 2684	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	32
PID 1700 wrote to memory of 2684	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	32
PID 1700 wrote to memory of 2684	1700	4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe	32
PID 2684 wrote to memory of 3060	2684	cmd.exe	34
PID 2684 wrote to memory of 3060	2684	cmd.exe	34
PID 2684 wrote to memory of 3060	2684	cmd.exe	34
PID 2684 wrote to memory of 3060	2684	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4f31dd4f9474b196c9022db377543492_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1700
- 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:2016
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\9C5mKihhVd.ini"
    3⤵
    PID:1636
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:3060

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

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\9C5mKihhVd.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1636-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1636-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1636-20-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1636-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1636-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1700-21-0x0000000074920000-0x0000000074ECB000-memory.dmp

Filesize
5.7MB

Download
memory/1700-0-0x0000000074921000-0x0000000074922000-memory.dmp

Filesize
4KB

Download
memory/1700-2-0x0000000074920000-0x0000000074ECB000-memory.dmp

Filesize
5.7MB

Download
memory/1700-1-0x0000000074920000-0x0000000074ECB000-memory.dmp

Filesize
5.7MB

Download
memory/2016-7-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2016-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2016-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2016-11-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2016-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2016-25-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2016-28-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads