isrstealer | 9b663d324d3316df0866ab8c0f86371a71399399672fbfa4a50410d367787e8b

General

Target

05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe
Size

5.3MB
MD5

05730af4dc030ac093a945e2912be8cd
SHA1

cea6918c3899d59d2098b6be893ec9865952e0b6
SHA256

9b663d324d3316df0866ab8c0f86371a71399399672fbfa4a50410d367787e8b
SHA512

67f42ed04b1c411a1321b166d44af1180eab0078bae766bb4695dad2de2a713c97831121aa93977c1b8fd61a0535f1d63b13ff0707e68421efda78c34bab7f14
SSDEEP

6144:7/m9kF4LhB959Ak24Fa8yVRasuSuvfQ1dskAsaJraBCDorAB:bfFWB9bpFatVMPfgsVpraB

Score

10^/10

isrstealer 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
behavioral2/memory/5064-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/5064-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/5064-19-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/5064-22-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3184-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3184-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3184-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3184-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2780 set thread context of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 5064 set thread context of 3184	5064	vbc.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2184	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5064	vbc.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 2780 wrote to memory of 5064	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	83
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 5064 wrote to memory of 3184	5064	vbc.exe	84
PID 2780 wrote to memory of 2024	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	85
PID 2780 wrote to memory of 2024	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	85
PID 2780 wrote to memory of 2024	2780	05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe	85
PID 2024 wrote to memory of 2184	2024	cmd.exe	87
PID 2024 wrote to memory of 2184	2024	cmd.exe	87
PID 2024 wrote to memory of 2184	2024	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2780
- 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
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5064
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\TgNi8Tue05.ini"
    3⤵
    PID:3184
- 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\05730af4dc030ac093a945e2912be8cd_JaffaCakes118.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2024
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:2184

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\TgNi8Tue05.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2780-0-0x0000000075362000-0x0000000075363000-memory.dmp

Filesize
4KB

Download
memory/2780-1-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/2780-2-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/2780-17-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/3184-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3184-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3184-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3184-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5064-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/5064-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/5064-19-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/5064-22-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

Sharing