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

Processes:

resource	yara_rule
behavioral2/memory/2056-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2056-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2056-21-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2056-24-0x0000000000400000-0x0000000000435000-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:

65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3004-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3004-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3004-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3004-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3004-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3004-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

Processes:

65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exevbc.exe

description	pid	process	target process
PID 5056 set thread context of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 2056 set thread context of 3004	2056	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

2000 PING.EXE
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

2056 vbc.exe

pid	process
2000	PING.EXE

pid	process
2056	vbc.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exevbc.execmd.exe

description	pid	process	target process
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 5056 wrote to memory of 2056	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 2056 wrote to memory of 3004	2056	vbc.exe	vbc.exe
PID 5056 wrote to memory of 5104	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	cmd.exe
PID 5056 wrote to memory of 5104	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	cmd.exe
PID 5056 wrote to memory of 5104	5056	65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe	cmd.exe
PID 5104 wrote to memory of 2000	5104	cmd.exe	PING.EXE
PID 5104 wrote to memory of 2000	5104	cmd.exe	PING.EXE
PID 5104 wrote to memory of 2000	5104	cmd.exe	PING.EXE

C:\Users\Admin\AppData\Local\Temp\65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\65721901b8c5c8ca042861c1e5ec007f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5056
- 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:2056
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\BmOnb3EXkY.ini"
    3⤵
    PID:3004
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:5104
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:2000

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\BmOnb3EXkY.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2056-24-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2056-21-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2056-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2056-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3004-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3004-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3004-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3004-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3004-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3004-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5056-0-0x00000000753E2000-0x00000000753E3000-memory.dmp

Filesize
4KB

Download
memory/5056-19-0x00000000753E0000-0x0000000075991000-memory.dmp

Filesize
5.7MB

Download
memory/5056-2-0x00000000753E0000-0x0000000075991000-memory.dmp

Filesize
5.7MB

Download
memory/5056-1-0x00000000753E0000-0x0000000075991000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads