isrstealer | 84a4ae8da468f498abd26fa2e623515e2bbf8453197ed464b265c8c28c3dbc69

General

Target

7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe
Size

172KB
MD5

7b3d660d3cf507cfc6631634fcb37f9f
SHA1

01bd2de172541a7d727d0286aedfa8b22ef52c46
SHA256

84a4ae8da468f498abd26fa2e623515e2bbf8453197ed464b265c8c28c3dbc69
SHA512

83f6bc6dc9e6156de60ce13c42bef01fe42675091251dc7ab0320264e5981637ed0db277adf007fac3758360b5e33edb22bfd68a022b2b244e649d07ede2298d
SSDEEP

3072:DKDAfCDSmJ7poBMEAvjgJisr5IOpiftZpMEaXWAVUo63964cYj:DReoBMzEJiOFQtZnEWEwvp

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 3 IoCs

resource	yara_rule
behavioral1/memory/132240-85666-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/132240-85669-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/132240-85681-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Executes dropped EXE 3 IoCs

pid	Process
2376	Keygen.exe
2268	lol.exe
132240	lol.exe

Loads dropped DLL 14 IoCs

pid	Process
2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe
2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe
2376	Keygen.exe
2376	Keygen.exe
2376	Keygen.exe
2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe
2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe
2268	lol.exe
2268	lol.exe
2268	lol.exe
2268	lol.exe
132240	lol.exe
132240	lol.exe
132240	lol.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

description	pid	Process	procid_target
PID 2268 set thread context of 132240	2268	lol.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	lol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	lol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Keygen.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
132240	lol.exe
132240	lol.exe
132240	lol.exe
132240	lol.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2268	lol.exe
132240	lol.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 2376	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2376	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2376	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2376	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2376	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2376	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2376	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2268	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2268	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2268	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2268	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2268	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2268	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2268	2544	7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe	31
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32
PID 2268 wrote to memory of 132240	2268	lol.exe	32

C:\Users\Admin\AppData\Local\Temp\7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7b3d660d3cf507cfc6631634fcb37f9f_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Users\Admin\AppData\Local\Temp\Keygen.exe
  "C:\Users\Admin\AppData\Local\Temp\Keygen.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2376
- C:\Users\Admin\AppData\Local\Temp\lol.exe
  "C:\Users\Admin\AppData\Local\Temp\lol.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2268
- - C:\Users\Admin\AppData\Local\Temp\lol.exe
    "C:\Users\Admin\AppData\Local\Temp\lol.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:132240

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

Replay Monitor

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Downloads

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

Filesize
24KB

MD5
e37e297e735def322875e3a88640c1b6

SHA1
057333885093d19d7f75ff1a87419122299981f9

SHA256
35bad3e11bed5327b3444e549b55e68b37e269035184725e1b5b17d19f2f8abe

SHA512
ea3d7061e9af64805e233c806212cc971a4dffe5896bfe6c83131b220b941d97dc98e69d3546944b88116ece57e82f386503c82dae06b203463e83e4057f9e3a

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

Filesize
223KB

MD5
81a53142e4c2449072cf3fe30da5125e

SHA1
8bb7d8412cdabca78cf35d3f884988a83f51b03d

SHA256
915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19

SHA512
18d7d7d4556bda3f1cc63956873635882a164dfe47cc425585b398616041ac6f703af3b4599599e0d5dd4ef034b975b30e99700621e79acac5abb8dfb7514e0c

Download Submit
memory/2268-75953-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/132240-85664-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/132240-85666-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/132240-85669-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/132240-85668-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/132240-85662-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/132240-85681-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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