isrstealer | ba05970dbe169411a8b77b2b5fb3c8572acb7447051e4a034b59f1d87127f905

General

Target

3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe
Size

17.3MB
MD5

3b2b355c80a79da3a42109b327c95576
SHA1

0ec369f9459658346ff48941fd531ec94b41e18e
SHA256

ba05970dbe169411a8b77b2b5fb3c8572acb7447051e4a034b59f1d87127f905
SHA512

2ca16c93672706e06af68e089702a492d3a1f0c3c3bd1ce98271ccc3e7f34fd51d93b885bba103c8280a6b84ec74d68fe514e1107a0b508979f49fe88483c93a
SSDEEP

12288:1KK8QCgFYvJDQHa+Pu1wdrtiJeeeeeveeeeee:v5GlQHTm1wqJeeeeeveeeeee

Score

10^/10

isrstealer 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 3 IoCs

resource	yara_rule
behavioral1/memory/2536-11-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2536-7-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2536-25-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3004 set thread context of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 2536 set thread context of 2940	2536	vbc.exe	31

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2940-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2940-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2940-21-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2940-20-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2940-24-0x0000000000400000-0x0000000000453000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 3 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

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	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 3004 wrote to memory of 2536	3004	3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe	30
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31
PID 2536 wrote to memory of 2940	2536	vbc.exe	31

C:\Users\Admin\AppData\Local\Temp\3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\3b2b355c80a79da3a42109b327c95576_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3004
- 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:2536
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2940

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2536-7-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2536-5-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2536-25-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2536-4-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2536-11-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2536-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2940-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2940-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2940-21-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2940-20-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2940-24-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3004-14-0x0000000074720000-0x0000000074CCB000-memory.dmp

Filesize
5.7MB

Download
memory/3004-0-0x0000000074721000-0x0000000074722000-memory.dmp

Filesize
4KB

Download
memory/3004-1-0x0000000074720000-0x0000000074CCB000-memory.dmp

Filesize
5.7MB

Download
memory/3004-2-0x0000000074720000-0x0000000074CCB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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