isrstealer | eba1b6a9c7e7bff2c7e1eee915d04e1123190e2186ae51eef744ad18901a4d79

General

Target

b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
Size

492KB
MD5

b73b615100f8b5ab85df87f9ca529960
SHA1

470a305dc5802e04ca80d00dcb1c7292e185aaea
SHA256

eba1b6a9c7e7bff2c7e1eee915d04e1123190e2186ae51eef744ad18901a4d79
SHA512

fd87462bfad756f1b9c4dd19fc28ddf8d592fc5c4f162a7479ae1e379f78a4db1e9ce9b8b0010de24979134c9ccf704e3e671072734b1dea3e99121562f9462c
SSDEEP

12288:/knms/dM9gz8NRRIaV3GhQxHNcmdqG8Doj64:/knm2wZxgQxHqm8Ggoj64

Score

10^/10

isrstealer collection 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/2276-9-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2276-5-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2276-21-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2276-28-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 2 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/memory/2528-25-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2528-26-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2528-25-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2528-26-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2284 set thread context of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2276 set thread context of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 set thread context of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1668-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2528-23-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2528-24-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2528-25-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2528-26-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2284 wrote to memory of 2276	2284	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	28
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 1668	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	29
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2528	2276	b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Users\Admin\AppData\Local\Temp\b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2276
- - C:\Users\Admin\AppData\Local\Temp\b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\i25IIJQ21c.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1668
- - C:\Users\Admin\AppData\Local\Temp\b73b615100f8b5ab85df87f9ca529960_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\8A5HyQBVwu.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2528

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

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\i25IIJQ21c.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1668-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2276-7-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2276-5-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2276-9-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2276-4-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2276-1-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2276-21-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2276-28-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2284-0-0x0000000003830000-0x0000000003885000-memory.dmp

Filesize
340KB

Download
memory/2528-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2528-24-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2528-25-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2528-26-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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