isrstealer | d4dd47bfc05f6fd084597bcdeecadfb02f65fc3461dbf9d223460282f95e63bf

General

Target

de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe
Size

74KB
MD5

de75ac5c0324a7048197ee04b5511858
SHA1

3c9d4955acde6c0445cd843c9960e33cb88880b9
SHA256

d4dd47bfc05f6fd084597bcdeecadfb02f65fc3461dbf9d223460282f95e63bf
SHA512

6b3579a24c1c55cee98e96d964d85104486c7a3f39c7ebaed91beeb3f6a5ebd23a9719ff0df0e3f0617a64ecb70ae047908bd9c64fe1fac72fdafa205baf40cb
SSDEEP

1536:yfe1oWLJbWE9Jzu9SuugCQYCDmvE9Lt/Wg1qEOFq3bIxj7glg:oe1oWNdJzqRs5goybigg

Score

10^/10

isrstealer discovery spyware 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

Processes:

resource	yara_rule
behavioral1/memory/1864-27-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1864-23-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1864-38-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1864-40-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

Processes:

WorumKoRCyn.exewinhost.exe

pid process

1860 WorumKoRCyn.exe
1864 winhost.exe
Loads dropped DLL 3 IoCs

Processes:

de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exeWorumKoRCyn.exe

pid process

2896 de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe
2896 de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe
1860 WorumKoRCyn.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Suspicious use of SetThreadContext 1 IoCs

Processes:

WorumKoRCyn.exe

description pid process target process

PID 1860 set thread context of 1864 1860 WorumKoRCyn.exe winhost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1860	WorumKoRCyn.exe
1864	winhost.exe

pid	process
2896	de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe
2896	de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe
1860	WorumKoRCyn.exe

description	pid	process	target process
PID 1860 set thread context of 1864	1860	WorumKoRCyn.exe	winhost.exe

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

Processes:

de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exeWorumKoRCyn.exewinhost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WorumKoRCyn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winhost.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

winhost.exe

pid process

1864 winhost.exe
1864 winhost.exe
1864 winhost.exe
1864 winhost.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WorumKoRCyn.exe

description pid process

Token: SeDebugPrivilege 1860 WorumKoRCyn.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winhost.exe

pid process

1864 winhost.exe

pid	process
1864	winhost.exe
1864	winhost.exe
1864	winhost.exe
1864	winhost.exe

description	pid	process
Token: SeDebugPrivilege	1860	WorumKoRCyn.exe

pid	process
1864	winhost.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exeWorumKoRCyn.exe

description	pid	process	target process
PID 2896 wrote to memory of 1860	2896	de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe	WorumKoRCyn.exe
PID 2896 wrote to memory of 1860	2896	de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe	WorumKoRCyn.exe
PID 2896 wrote to memory of 1860	2896	de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe	WorumKoRCyn.exe
PID 2896 wrote to memory of 1860	2896	de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe	WorumKoRCyn.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe
PID 1860 wrote to memory of 1864	1860	WorumKoRCyn.exe	winhost.exe

C:\Users\Admin\AppData\Local\Temp\de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\de75ac5c0324a7048197ee04b5511858_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2896
- C:\Users\Admin\AppData\Local\Temp\WorumKoRCyn.exe
  "C:\Users\Admin\AppData\Local\Temp\WorumKoRCyn.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Users\Admin\AppData\Local\Temp\winhost.exe
    C:\Users\Admin\AppData\Local\Temp\winhost.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:1864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\WorumKoRCyn.exe

Filesize
64KB

MD5
cd14ae71afe756e1c1d21133bf3a1186

SHA1
7600be7aeb904f90fb3e911dea4532ccb97f601d

SHA256
15ccfb7cfbe0d790afcfeeb0eef0fb384facb14afc03ba3a1463d41ab2df467e

SHA512
0682ab4c5d03364d93db50072c33bf88bf383b07dac77cd4c2eae7864727e4f81a790c16e41ad73d878c89f17e73fdef66793bfdb691e74f8f84e64756bb975d

Download Submit
\Users\Admin\AppData\Local\Temp\winhost.exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
memory/1860-18-0x0000000074B00000-0x00000000750AB000-memory.dmp

Filesize
5.7MB

Download
memory/1860-19-0x0000000074B00000-0x00000000750AB000-memory.dmp

Filesize
5.7MB

Download
memory/1860-35-0x0000000074B00000-0x00000000750AB000-memory.dmp

Filesize
5.7MB

Download
memory/1864-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-27-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1864-23-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-22-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-38-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-40-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2896-13-0x0000000074B00000-0x00000000750AB000-memory.dmp

Filesize
5.7MB

Download
memory/2896-2-0x0000000074B00000-0x00000000750AB000-memory.dmp

Filesize
5.7MB

Download
memory/2896-0-0x0000000074B01000-0x0000000074B02000-memory.dmp

Filesize
4KB

Download
memory/2896-1-0x0000000074B00000-0x00000000750AB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads