isrstealer | a371c45b9e43f518eb3f66b1f1134064ca28c618a03aca63ab621888e12a1d08

General

Target

JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
Size

223KB
MD5

c9a28e7a089a43ff800fd32a94e8edc2
SHA1

77a610930174021c7000c06f14e4b1a7bcc275c8
SHA256

a371c45b9e43f518eb3f66b1f1134064ca28c618a03aca63ab621888e12a1d08
SHA512

89d94e4524cd1540e55822ebcbad2a4068f7562060885b4c8cb93b0610be9d61d2d90b3d9ed46dc76780d9cba1c97cb5ded2a7ca2ef77447a859783711fd26bd
SSDEEP

3072:doy9wREmk+EIoHWKTHpklRdHek0FU4+gbcNhHpDsANcniSx7CAEOY43CGgqx8sB9:doyME+EIkHmwFU7RpDsAeIn1G44Q8Rl

Score

10^/10

isrstealer discovery spyware 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 4 IoCs

resource	yara_rule
behavioral1/memory/2084-8-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2084-12-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2084-19-0x00000000001C0000-0x00000000001DA000-memory.dmp	family_isrstealer
behavioral1/memory/2084-30-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2380 set thread context of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2084 set thread context of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2100-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2100-23-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2100-25-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2100-24-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2100-29-0x0000000000400000-0x0000000000453000-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	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	30
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31
PID 2084 wrote to memory of 2100	2084	JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c9a28e7a089a43ff800fd32a94e8edc2.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2084-19-0x00000000001C0000-0x00000000001DA000-memory.dmp

Filesize
104KB

Download
memory/2084-8-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2084-4-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2084-6-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2084-38-0x00000000001C0000-0x00000000001DA000-memory.dmp

Filesize
104KB

Download
memory/2084-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2084-30-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2084-12-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2100-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2100-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2100-25-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2100-24-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2100-29-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2380-16-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/2380-3-0x0000000000230000-0x000000000024A000-memory.dmp

Filesize
104KB

Download
memory/2380-0-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download

Analysis

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