isrstealer | 4d84bba109e2617bc13ecd044862c3f86c375e785437d80accf4a9d90ed11d16

General

Target

fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe
Size

4.3MB
MD5

fa4dd7a933a586082814790af58cf8c5
SHA1

9ddc9c0b84f4e46f6a0eb35f31afa566c4bb00a0
SHA256

4d84bba109e2617bc13ecd044862c3f86c375e785437d80accf4a9d90ed11d16
SHA512

4e750bf97f67eba9d3a107a198cf9e297e270ae773d181a686bcdf715de2d2558d2e680807031c3f23853c65f627052d2412a7f4c7b995fc3a1ce9badd89c2a3
SSDEEP

6144:7/m9kF4LhB959Ak24Fa8yVRasuSuvfQ1dskAsaJraBCDorAB:bfFWB9bpFatVMPfgsVpraB

Score

10^/10

isrstealer discovery 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
behavioral1/memory/2540-7-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2540-4-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2540-13-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2540-25-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2540-30-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Deletes itself 1 IoCs

pid	Process
712	cmd.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2524 set thread context of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2540 set thread context of 2160	2540	vbc.exe	31

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2160-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2160-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2160-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2160-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2160-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2160-23-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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 5 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	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
712	cmd.exe
2996	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2996	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2540	vbc.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2524 wrote to memory of 2540	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	30
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2540 wrote to memory of 2160	2540	vbc.exe	31
PID 2524 wrote to memory of 712	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	32
PID 2524 wrote to memory of 712	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	32
PID 2524 wrote to memory of 712	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	32
PID 2524 wrote to memory of 712	2524	fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe	32
PID 712 wrote to memory of 2996	712	cmd.exe	34
PID 712 wrote to memory of 2996	712	cmd.exe	34
PID 712 wrote to memory of 2996	712	cmd.exe	34
PID 712 wrote to memory of 2996	712	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\TMGE0WjMJp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2160
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C ping 1.1.1.1 -n 1 -w 1000 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\fa4dd7a933a586082814790af58cf8c5_JaffaCakes118.exe"
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:712
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\TMGE0WjMJp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2160-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2160-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2160-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2160-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2160-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2160-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2524-8-0x00000000743F0000-0x000000007499B000-memory.dmp

Filesize
5.7MB

Download
memory/2524-0-0x00000000743F1000-0x00000000743F2000-memory.dmp

Filesize
4KB

Download
memory/2524-20-0x00000000743F0000-0x000000007499B000-memory.dmp

Filesize
5.7MB

Download
memory/2524-1-0x00000000743F0000-0x000000007499B000-memory.dmp

Filesize
5.7MB

Download
memory/2540-13-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2540-2-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2540-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2540-4-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2540-7-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2540-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2540-25-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2540-30-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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