isrstealer | 2c88469023eab87ea72ca237b159f09c0d1fa314b26706fa7164f6edceb179c7

General

Target

65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe
Size

4.1MB
MD5

65721901b8c5c8ca042861c1e5ec007f
SHA1

074f1d0f378228e785590d7a628b398282c1285b
SHA256

2c88469023eab87ea72ca237b159f09c0d1fa314b26706fa7164f6edceb179c7
SHA512

d0c3aff70ed7fc79a6680c11a3a9bd92cfa4b8f7cf804ee14901f3fbe5dbe726ad00d774a970e196f41187ec8fb02f293a57de3e5ada5e727ff19efd141181c0
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

resource	yara_rule
behavioral1/memory/2908-9-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2908-6-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2908-25-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2908-29-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Deletes itself 1 IoCs

pid	Process
2240	cmd.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1856-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1856-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1856-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1856-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1856-23-0x0000000000400000-0x0000000000453000-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 2556 set thread context of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2908 set thread context of 1856	2908	vbc.exe	30

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

pid	Process
2768	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2908	vbc.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2556 wrote to memory of 2908	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	29
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2908 wrote to memory of 1856	2908	vbc.exe	30
PID 2556 wrote to memory of 2240	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	31
PID 2556 wrote to memory of 2240	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	31
PID 2556 wrote to memory of 2240	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	31
PID 2556 wrote to memory of 2240	2556	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	31
PID 2240 wrote to memory of 2768	2240	cmd.exe	33
PID 2240 wrote to memory of 2768	2240	cmd.exe	33
PID 2240 wrote to memory of 2768	2240	cmd.exe	33
PID 2240 wrote to memory of 2768	2240	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2556
- 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:2908
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\4yEyrtt2oj.ini"
    3⤵
    PID:1856
- 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\65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2240
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:2768

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\4yEyrtt2oj.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1856-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1856-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1856-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1856-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1856-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2556-20-0x0000000074A20000-0x0000000074FCB000-memory.dmp

Filesize
5.7MB

Download
memory/2556-0-0x0000000074A21000-0x0000000074A22000-memory.dmp

Filesize
4KB

Download
memory/2556-2-0x0000000074A20000-0x0000000074FCB000-memory.dmp

Filesize
5.7MB

Download
memory/2556-1-0x0000000074A20000-0x0000000074FCB000-memory.dmp

Filesize
5.7MB

Download
memory/2908-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-6-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-7-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2908-9-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-25-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2908-29-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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