isrstealer | d6637c6c05a5268fccd2602cd7d384f57448b570f38aab1f752dab4c1af00c59

General

Target

54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe
Size

868KB
MD5

54fb130e36f9335f843e242559cb2b0c
SHA1

3f87bfafd292e7c22ebfc0b76ff7c7ec40c2a256
SHA256

d6637c6c05a5268fccd2602cd7d384f57448b570f38aab1f752dab4c1af00c59
SHA512

49485abcae8de4c7fc7c57f4359e0046e14565273ba73d96715e8c89371c7c9d3615d7ab0ab9983b0edcbf38706f5a6f4504aaf371fc9a48ea695a2a05761e27
SSDEEP

12288:NtQN+pguUxLeEpvF+z7E5QvNvlgTJmvsEs+ZSnR+is1igoe+esTCm:zQ4pI2lvllV0X+Z64j1ig42m

Score

10^/10

isrstealer collection persistence 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 5 IoCs

resource	yara_rule
behavioral2/memory/4564-20-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4564-22-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4564-24-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4564-40-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4564-48-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1556-45-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1556-44-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1556-46-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/1556-45-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1556-44-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1556-46-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe

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

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2252-29-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2252-31-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2252-32-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2252-33-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2252-37-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1556-41-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1556-43-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1556-45-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1556-44-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1556-46-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe

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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Admin\\AppData\\Roaming\\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe"	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4380 set thread context of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4564 set thread context of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 set thread context of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4380 wrote to memory of 4564	4380	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	92
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 2252	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	93
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94
PID 4564 wrote to memory of 1556	4564	54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe	94

C:\Users\Admin\AppData\Local\Temp\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Users\Admin\AppData\Local\Temp\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4564
- - C:\Users\Admin\AppData\Local\Temp\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\MkvpZuL6Qa.ini"
    3⤵
    PID:2252
- - C:\Users\Admin\AppData\Local\Temp\54fb130e36f9335f843e242559cb2b0c_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\ZWydlTlZLr.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1556

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:4008

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

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

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\MkvpZuL6Qa.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1556-46-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1556-44-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1556-45-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1556-43-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1556-41-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2252-29-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2252-37-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2252-33-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2252-32-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2252-31-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4380-13-0x0000000002580000-0x0000000002581000-memory.dmp

Filesize
4KB

Download
memory/4380-10-0x0000000002530000-0x0000000002531000-memory.dmp

Filesize
4KB

Download
memory/4380-18-0x0000000002590000-0x0000000002591000-memory.dmp

Filesize
4KB

Download
memory/4380-17-0x00000000025A0000-0x00000000025A1000-memory.dmp

Filesize
4KB

Download
memory/4380-16-0x00000000026C0000-0x00000000026C1000-memory.dmp

Filesize
4KB

Download
memory/4380-15-0x0000000002550000-0x0000000002551000-memory.dmp

Filesize
4KB

Download
memory/4380-14-0x0000000002540000-0x0000000002541000-memory.dmp

Filesize
4KB

Download
memory/4380-0-0x0000000000400000-0x00000000006CA000-memory.dmp

Filesize
2.8MB

Download
memory/4380-19-0x0000000002830000-0x0000000002831000-memory.dmp

Filesize
4KB

Download
memory/4380-1-0x00000000024A0000-0x00000000024E2000-memory.dmp

Filesize
264KB

Download
memory/4380-8-0x0000000000890000-0x0000000000891000-memory.dmp

Filesize
4KB

Download
memory/4380-7-0x00000000008D0000-0x00000000008D1000-memory.dmp

Filesize
4KB

Download
memory/4380-9-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/4380-12-0x0000000002560000-0x0000000002561000-memory.dmp

Filesize
4KB

Download
memory/4380-11-0x0000000002570000-0x0000000002572000-memory.dmp

Filesize
8KB

Download
memory/4380-2-0x0000000002510000-0x0000000002511000-memory.dmp

Filesize
4KB

Download
memory/4380-34-0x0000000000400000-0x00000000006CA000-memory.dmp

Filesize
2.8MB

Download
memory/4380-35-0x00000000024A0000-0x00000000024E2000-memory.dmp

Filesize
264KB

Download
memory/4380-3-0x0000000000880000-0x0000000000881000-memory.dmp

Filesize
4KB

Download
memory/4380-4-0x0000000000870000-0x0000000000871000-memory.dmp

Filesize
4KB

Download
memory/4380-6-0x00000000008E0000-0x00000000008E1000-memory.dmp

Filesize
4KB

Download
memory/4380-5-0x00000000008F0000-0x00000000008F1000-memory.dmp

Filesize
4KB

Download
memory/4564-40-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4564-24-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4564-22-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4564-20-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4564-48-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads