isrstealer | 3deaae34fd6f0a22fe551022c36f6e099ebe23d4605f016299e64c140bfb1d47

General

Target

f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe
Size

344KB
MD5

f97dcc1d1a01b072051b0e5c7c35b222
SHA1

8dfe3aed3315d58c1be2b40b6210245985c1f660
SHA256

3deaae34fd6f0a22fe551022c36f6e099ebe23d4605f016299e64c140bfb1d47
SHA512

1b8824d3133b15f149059700f9160374494bf0f4ce4886160e6d014638d2a134cebd9bc281e7e2c5e3f567cc68e448f6735a06600c7974d6058877dd0bebd28a
SSDEEP

6144:Cduhp8wcIhNHKJ/zSUE4iCJz9iKKiG1KEg3QX7vebSgGweJ5YY35BzaJrLkaG66e:Cduf8wceeSUzkKKiGe3kmS1TJjrzaJ+g

Score

10^/10

isrstealer discovery persistence 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 3 IoCs

resource	yara_rule
behavioral1/memory/2952-24-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2952-28-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2952-51-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Executes dropped EXE 3 IoCs

pid	Process
2132	twitter.exe
2952	cvtres.exe
2060	cvtres.exe

Loads dropped DLL 4 IoCs

pid	Process
1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe
1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe
2132	twitter.exe
1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.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 3 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

Credentials from Web Browsers
T1555.003

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-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Run\Twitter Live = "C:\\Users\\Admin\\AppData\\Local\\Temp\\twitter.exe"	twitter.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2132 set thread context of 2952	2132	twitter.exe	31
PID 1768 set thread context of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	twitter.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2952	cvtres.exe
2952	cvtres.exe
2952	cvtres.exe
2952	cvtres.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2132	twitter.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2952	cvtres.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 2132	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	30
PID 1768 wrote to memory of 2132	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	30
PID 1768 wrote to memory of 2132	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	30
PID 1768 wrote to memory of 2132	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	30
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 2132 wrote to memory of 2952	2132	twitter.exe	31
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32
PID 1768 wrote to memory of 2060	1768	f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe	32

C:\Users\Admin\AppData\Local\Temp\f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f97dcc1d1a01b072051b0e5c7c35b222_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Users\Admin\AppData\Local\Temp\twitter.exe
  "C:\Users\Admin\AppData\Local\Temp\twitter.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2132
- - C:\Users\Admin\AppData\Local\Temp\cvtres.exe
    C:\Users\Admin\AppData\Local\Temp\cvtres.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2952
- C:\Users\Admin\AppData\Local\Temp\cvtres.exe
  C:\Users\Admin\AppData\Local\Temp\cvtres.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

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

C:\Users\Admin\AppData\Local\Temp\cvtres.exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

Filesize
60KB

MD5
eb5f21bcad7aa10e222d71890f729411

SHA1
4333182d709be1c983752e193e126fab2f7335bf

SHA256
396ae8d5f2203017a6b984ae3aba37cfb3f90070ce5839ed3d6edc347936c4b0

SHA512
a01b5c873feee324ef475afa386a055027d9e9f8e9ff37c3a77f85c2d1f2db9b5c8efbb4906c44d27d11a13fe7175474f4300b4eefa8e50de29383f85833b24a

Download Submit
memory/1768-1-0x0000000074420000-0x00000000749CB000-memory.dmp

Filesize
5.7MB

Download
memory/1768-2-0x0000000074420000-0x00000000749CB000-memory.dmp

Filesize
5.7MB

Download
memory/1768-0-0x0000000074421000-0x0000000074422000-memory.dmp

Filesize
4KB

Download
memory/1768-45-0x0000000074420000-0x00000000749CB000-memory.dmp

Filesize
5.7MB

Download
memory/2060-43-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-42-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-53-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-32-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-33-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-34-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-44-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-38-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2060-48-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2132-47-0x0000000074420000-0x00000000749CB000-memory.dmp

Filesize
5.7MB

Download
memory/2132-14-0x0000000074420000-0x00000000749CB000-memory.dmp

Filesize
5.7MB

Download
memory/2132-13-0x0000000074420000-0x00000000749CB000-memory.dmp

Filesize
5.7MB

Download
memory/2132-15-0x0000000074420000-0x00000000749CB000-memory.dmp

Filesize
5.7MB

Download
memory/2952-24-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2952-28-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2952-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2952-22-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2952-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2952-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads