458a7240bace209c7a5490818bea5960d4efd006e03a441dc6ad5370a52aff1a

General

Target

661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
Size

643KB
MD5

661d6eb6ac7c569c21c765a6ea09fd0a
SHA1

3ba9f6031a19041bc499215a61ad82c34997ddcb
SHA256

458a7240bace209c7a5490818bea5960d4efd006e03a441dc6ad5370a52aff1a
SHA512

a293bdd7cef3b258bb011777531541d81e4d2e1a9f6018fa2e688b4d00fb0226b9b12b54d692d15733df2e036a331ddece79a47d7e5d622b0aede057afae8f9c
SSDEEP

12288:xjkArEN249AyE/rbaMct4bO2/VGVw7E3kyaXl65zsWvVsMojKSHxgP7aOgCcDBDx:+FE//Tct4bOssROs5IW6MYKaxtLEG

Score

10^/10

evasion persistence trojan upx

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-47134698-4092160662-1261813102-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	csrcs.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-47134698-4092160662-1261813102-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	csrcs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	csrcs.exe

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-1-5-21-47134698-4092160662-1261813102-1000\Control Panel\International\Geo\Nation	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
2996	csrcs.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5096-0-0x0000000000400000-0x000000000051F000-memory.dmp	upx
behavioral2/files/0x00090000000234ff-12.dat	upx
behavioral2/memory/5096-30-0x0000000000400000-0x000000000051F000-memory.dmp	upx
behavioral2/memory/2996-31-0x0000000000400000-0x000000000051F000-memory.dmp	upx
behavioral2/memory/2996-62-0x0000000000400000-0x000000000051F000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	csrcs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	csrcs.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
68	checkip.dyndns.org

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/5096-30-0x0000000000400000-0x000000000051F000-memory.dmp	autoit_exe
behavioral2/memory/2996-31-0x0000000000400000-0x000000000051F000-memory.dmp	autoit_exe
behavioral2/memory/2996-62-0x0000000000400000-0x000000000051F000-memory.dmp	autoit_exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\csrcs.exe	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\csrcs.exe	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\autorun.in	csrcs.exe
File opened for modification	C:\Windows\SysWOW64\autorun.i	csrcs.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe

Suspicious use of FindShellTrayWindow 6 IoCs

pid	Process
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
2996	csrcs.exe
2996	csrcs.exe
2996	csrcs.exe

Suspicious use of SendNotifyMessage 6 IoCs

pid	Process
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
2996	csrcs.exe
2996	csrcs.exe
2996	csrcs.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 2996	5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe	87
PID 5096 wrote to memory of 2996	5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe	87
PID 5096 wrote to memory of 2996	5096	661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe	87

C:\Users\Admin\AppData\Local\Temp\661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\661d6eb6ac7c569c21c765a6ea09fd0a_JaffaCakes118.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:5096
- C:\Windows\SysWOW64\csrcs.exe
  "C:\Windows\SysWOW64\csrcs.exe"
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Adds policy Run key to start application
  - Executes dropped EXE
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Drops file in System32 directory
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Hide Artifacts

1

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ufyszui

Filesize
97KB

MD5
6f913b8649ade1cfeb20272ce3dc89ef

SHA1
f90fc07f5d70259193226ab72a3d3a82ba8f9156

SHA256
a563e3685911e7e9b2bca0f1c269ad7c7e332fc6a74d2614beca2ace9a0f40ef

SHA512
db22b097646880a966aff1bcb8cacd70a8ae775b358df7ae9798b90c628c8f8edefd4c76500ac87613e12605592034dc7cd40670d78af7c740f9fed0ff0c79f9

Download Submit
C:\Windows\SysWOW64\csrcs.exe

Filesize
643KB

MD5
661d6eb6ac7c569c21c765a6ea09fd0a

SHA1
3ba9f6031a19041bc499215a61ad82c34997ddcb

SHA256
458a7240bace209c7a5490818bea5960d4efd006e03a441dc6ad5370a52aff1a

SHA512
a293bdd7cef3b258bb011777531541d81e4d2e1a9f6018fa2e688b4d00fb0226b9b12b54d692d15733df2e036a331ddece79a47d7e5d622b0aede057afae8f9c

Download Submit
memory/2996-31-0x0000000000400000-0x000000000051F000-memory.dmp

Filesize
1.1MB

Download
memory/2996-62-0x0000000000400000-0x000000000051F000-memory.dmp

Filesize
1.1MB

Download
memory/5096-0-0x0000000000400000-0x000000000051F000-memory.dmp

Filesize
1.1MB

Download
memory/5096-30-0x0000000000400000-0x000000000051F000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads