isrstealer | d97496bd7b2111c332f4ea8e1af4938be8db36c8de4c7eba7d2d2b4520a5c0bf

General

Target

023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe
Size

4.5MB
MD5

023224dcec53ae2b55eb5eb2d5cc78c5
SHA1

863af06d6e17f12ad05b3f96d515fa661beb8f2b
SHA256

d97496bd7b2111c332f4ea8e1af4938be8db36c8de4c7eba7d2d2b4520a5c0bf
SHA512

d48e1041fae9b5dc216c18b74dd6cb0313ea1d9169a248243aabb32604e0a80723529a169d6ed59d2196419958b75dd468d6bcb8f52a8c07dbf712ae90d9bbc7
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 5 IoCs

resource	yara_rule
behavioral2/memory/2372-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2372-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2372-8-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2372-20-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/2372-23-0x0000000000400000-0x0000000000435000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3428-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3428-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3428-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3428-9-0x0000000000400000-0x0000000000453000-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 1152 set thread context of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 2372 set thread context of 3428	2372	vbc.exe	85

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
4940	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2372	vbc.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 1152 wrote to memory of 2372	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	84
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 2372 wrote to memory of 3428	2372	vbc.exe	85
PID 1152 wrote to memory of 3212	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	86
PID 1152 wrote to memory of 3212	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	86
PID 1152 wrote to memory of 3212	1152	023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe	86
PID 3212 wrote to memory of 4940	3212	cmd.exe	88
PID 3212 wrote to memory of 4940	3212	cmd.exe	88
PID 3212 wrote to memory of 4940	3212	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1152
- 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:2372
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\qJGndg12a4.ini"
    3⤵
    PID:3428
- 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\023224dcec53ae2b55eb5eb2d5cc78c5_JaffaCakes118.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3212
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:4940

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\qJGndg12a4.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1152-18-0x0000000074690000-0x0000000074C41000-memory.dmp

Filesize
5.7MB

Download
memory/1152-1-0x0000000074690000-0x0000000074C41000-memory.dmp

Filesize
5.7MB

Download
memory/1152-2-0x0000000074690000-0x0000000074C41000-memory.dmp

Filesize
5.7MB

Download
memory/1152-0-0x0000000074692000-0x0000000074693000-memory.dmp

Filesize
4KB

Download
memory/2372-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2372-8-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2372-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2372-20-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2372-23-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3428-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3428-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3428-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3428-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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