isrstealer | 08e8b75fb98b28e50863662508ed74de229fbc052923f8db05822861ae081d51

General

Target

JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
Size

513KB
MD5

7ba1d18562d7219931228d66d4d5e4d1
SHA1

b4bd541564dc53bb38dd884c4853cdf035bc5dd5
SHA256

08e8b75fb98b28e50863662508ed74de229fbc052923f8db05822861ae081d51
SHA512

b433fbebf9b81ad42f86a1597b03eb427ac2c93b40aab73bf3eaf9df5786815782009d91d30b2234438f57b5c4cc1d7f94201e3e3d9b34b8339792a3bca697d2
SSDEEP

12288:WcgFDJ6B42I08WbtJc7vmg41KU3ZE0D1msMf+su:p8AB42I0ntJc7vmg41bRHMf+s

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/2584-12-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2584-8-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2584-36-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2584-37-0x0000000000400000-0x0000000000442000-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/2696-34-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2696-35-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2696-34-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2696-35-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Loads dropped DLL 1 IoCs

pid	Process
2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe

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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2268 set thread context of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2584 set thread context of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 set thread context of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2868-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2868-24-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2868-25-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2868-26-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2868-28-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2696-30-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2696-32-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2696-33-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2696-34-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2696-35-0x0000000000400000-0x000000000041F000-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	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2268 wrote to memory of 2584	2268	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	29
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2868	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	30
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31
PID 2584 wrote to memory of 2696	2584	JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2584
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\neZpfJzcQl.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2868
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7ba1d18562d7219931228d66d4d5e4d1.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\x4Lbj0uvuL.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2696

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\neZpfJzcQl.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
\Users\Admin\AppData\Local\Temp\crypt.dll

Filesize
56KB

MD5
d848ca40948f7c464f239d96bc7c9632

SHA1
851634e1bdd7a1d286d96a3c938b4114d26dbc69

SHA256
61bedf0d2927f44da317aab4dcb0d6c9010ee6d4a8c678ece6bf90639aa74523

SHA512
66fc4da86e5b5dd693ea93fa13e44a50f15ffe14e677b39fe6cb2719a941a2cbd36bc227e63a9125a0167c99b924e82e10edad696fe8b8434811aeca93ffa763

Download Submit
memory/2268-2-0x0000000000330000-0x0000000000347000-memory.dmp

Filesize
92KB

Download
memory/2268-17-0x0000000000010000-0x000000000009B000-memory.dmp

Filesize
556KB

Download
memory/2584-4-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2584-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2584-12-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2584-8-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2584-6-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2584-37-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2584-36-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2696-32-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2696-30-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2696-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2696-34-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2696-35-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2868-28-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2868-26-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2868-25-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2868-24-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2868-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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