isrstealer | 88f20b91f2c3982d599234935e50f60f4680b16f2c92b6081775fc6445152f5e

General

Target

96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe
Size

247KB
MD5

96b3788e14a23cc2a7e1d1c5aaf40c55
SHA1

2494209949507948743fac84b280a7cf8632acca
SHA256

88f20b91f2c3982d599234935e50f60f4680b16f2c92b6081775fc6445152f5e
SHA512

3aca5861881fc38c70eacd41b06fb5186f5463fad0277cfb6652e3264dea5f65ad3a5fdf7e3b96b8bbd62001fa46a774b057ec96085fd2b64d941544e31ee1cb
SSDEEP

3072:dM8J9zo3cSWcJO4V+4RRbSrLN2LAcJEh/eAclw48y:dM8J9zog4VxSALv+h/sS

Score

10^/10

isrstealer discovery persistence stealer trojan

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/1616-12-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1616-8-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1616-17-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1616-20-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\Java Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\NhKPcZIVuuWerTmSqI.exe"	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2064 set thread context of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31

System Location Discovery: System Language Discovery 1 TTPs 2 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	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1616	vbc.exe
1616	vbc.exe
1616	vbc.exe
1616	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1616	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31
PID 2064 wrote to memory of 1616	2064	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2064
- C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1616-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1616-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1616-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1616-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1616-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1616-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1616-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1616-19-0x0000000000420000-0x00000000004FF000-memory.dmp

Filesize
892KB

Download
memory/2064-0-0x0000000074711000-0x0000000074712000-memory.dmp

Filesize
4KB

Download
memory/2064-1-0x0000000074710000-0x0000000074CBB000-memory.dmp

Filesize
5.7MB

Download
memory/2064-2-0x0000000074710000-0x0000000074CBB000-memory.dmp

Filesize
5.7MB

Download
memory/2064-18-0x0000000074710000-0x0000000074CBB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads