isrstealer | 2b2eea41b09e087fc9d52ce6804362345ea039ceac7e414a47d3fa2d425223c5

General

Target

56c51408980214acddab69287af0ecdd_JaffaCakes118.exe
Size

5.7MB
MD5

56c51408980214acddab69287af0ecdd
SHA1

ac755c57cca84a40678d686905a9d7ea4d3cc2ae
SHA256

2b2eea41b09e087fc9d52ce6804362345ea039ceac7e414a47d3fa2d425223c5
SHA512

ed7f456ffa328182a1c8e03b3d08cc47526d81c53a9fef3a40ea6d52264df611578cca9828979a7fc4ccfee2703bd38a9dd8192902978744856371a85c5be218
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 6 IoCs

resource	yara_rule
behavioral1/memory/2772-7-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2772-12-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2772-16-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2772-29-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2772-31-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2772-34-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Deletes itself 1 IoCs

pid	Process
2136	cmd.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1712-20-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1712-21-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1712-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1712-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1712-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1712-27-0x0000000000400000-0x0000000000453000-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 784 set thread context of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 2772 set thread context of 1712	2772	vbc.exe	32

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
2672	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2772	vbc.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 784 wrote to memory of 2772	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	31
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 2772 wrote to memory of 1712	2772	vbc.exe	32
PID 784 wrote to memory of 2136	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	33
PID 784 wrote to memory of 2136	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	33
PID 784 wrote to memory of 2136	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	33
PID 784 wrote to memory of 2136	784	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	33
PID 2136 wrote to memory of 2672	2136	cmd.exe	35
PID 2136 wrote to memory of 2672	2136	cmd.exe	35
PID 2136 wrote to memory of 2672	2136	cmd.exe	35
PID 2136 wrote to memory of 2672	2136	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\56c51408980214acddab69287af0ecdd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\56c51408980214acddab69287af0ecdd_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:784
- 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:2772
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\liYLmvJ4na.ini"
    3⤵
    PID:1712
- 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\56c51408980214acddab69287af0ecdd_JaffaCakes118.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:2672

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

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\liYLmvJ4na.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/784-23-0x0000000074070000-0x000000007461B000-memory.dmp

Filesize
5.7MB

Download
memory/784-1-0x0000000074070000-0x000000007461B000-memory.dmp

Filesize
5.7MB

Download
memory/784-2-0x0000000074070000-0x000000007461B000-memory.dmp

Filesize
5.7MB

Download
memory/784-0-0x0000000074071000-0x0000000074072000-memory.dmp

Filesize
4KB

Download
memory/1712-27-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1712-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1712-25-0x0000000000460000-0x00000000005E1000-memory.dmp

Filesize
1.5MB

Download
memory/1712-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1712-20-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1712-21-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1712-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2772-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2772-16-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2772-7-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2772-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2772-12-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2772-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2772-29-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2772-31-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2772-34-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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