0ce36021731a718190f970769d0bc51e74268f7bc907c1a7251c0cb05336cf66

General

Target

dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
Size

35KB
MD5

dbf56ee3e6aac2e967ca25d1265063cb
SHA1

4656ac7c7244de9fe8ad95e2aa40a3aae6a70775
SHA256

0ce36021731a718190f970769d0bc51e74268f7bc907c1a7251c0cb05336cf66
SHA512

7ba76f35ec12394f08987c2a7897d3f0d64fc0d8f05edaca21cffe28768863e03809526159bc5aef9ce2004fad618c4b8f7adbad7b6910b6e527b34423f4e652
SSDEEP

768:1yZaKiQO/wls1dzo7T9DRWPx8p2SivRLAfzb8ZCT:c/O/wl6kRRSJpLALgZc

Score

10^/10

discovery evasion execution upx

Malware Config

Signatures

Disables service(s) 3 TTPs
evasion execution

Windows Service
T1543.003

Service Stop
T1489

Service Execution
T1569.002
Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Deletes itself 1 IoCs

pid	Process
2804	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2804	rundll32.exe
2804	rundll32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3764-0-0x0000000000400000-0x0000000000419000-memory.dmp	upx
behavioral2/memory/3764-18-0x0000000000400000-0x0000000000419000-memory.dmp	upx

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\DVR0034017.dll	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\DVR0034017.dll	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\chinasougou.ime	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\YUksuser.dll	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\ksuser.dll	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4352	sc.exe
4912	sc.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3764 wrote to memory of 4700	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	84
PID 3764 wrote to memory of 4700	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	84
PID 3764 wrote to memory of 4700	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	84
PID 3764 wrote to memory of 4912	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	85
PID 3764 wrote to memory of 4912	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	85
PID 3764 wrote to memory of 4912	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	85
PID 3764 wrote to memory of 4352	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	86
PID 3764 wrote to memory of 4352	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	86
PID 3764 wrote to memory of 4352	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	86
PID 3764 wrote to memory of 2804	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	87
PID 3764 wrote to memory of 2804	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	87
PID 3764 wrote to memory of 2804	3764	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	87
PID 4700 wrote to memory of 4076	4700	net.exe	91
PID 4700 wrote to memory of 4076	4700	net.exe	91
PID 4700 wrote to memory of 4076	4700	net.exe	91

C:\Users\Admin\AppData\Local\Temp\dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3764
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4076
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4912
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4352
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1726121505.dat, ServerMain c:\users\admin\appdata\local\temp\dbf56ee3e6aac2e967ca25d1265063cb_jaffacakes118.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

2

T1569

Service Execution

2

T1569.002

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

2

T1489

Replay Monitor

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Downloads

C:\Windows\SysWOW64\DVR0034017.dll

Filesize
32KB

MD5
89d6f2f058b29e2913bf6b59e5092633

SHA1
fdef9416d046ecec5903c6d9cef04f93bbd8f320

SHA256
c59df1220a080eae6fb576b408f2b772cc4c4c5c92eb72567af2ffeed438ee24

SHA512
a1b0eac9f8f3e60ef5caf14466f2768b5ba587da1732dd27a1cc9719129bc4cab6ed1754bee703cb7eee1e4ef64383e259d141e9cb8e6986433f4524c80df99d

Download Submit
C:\Windows\SysWOW64\chinasougou.ime

Filesize
8KB

MD5
251224cd16c7d500b103cdc6c0e6fc62

SHA1
5fdaa016efccc9ff6a2f41800a006f1adc606944

SHA256
666e8c00cf310cfd2a29088039ab14e0f18cc77b472b812f03a9a563bba221a8

SHA512
8d063bf5fed1f5b9c3f8fd56f7ef1a54fb671b5ae8e92dcfc751eac71cb895a69e7e38abe0e0ce3ea3bd4c4bb2f3ef329ca208b1d5235a5fa2f7515fbb47a053

Download Submit
C:\Windows\SysWOW64\yuksuser.dll

Filesize
19KB

MD5
e55c45cc69106079bb6a144bc8655b4e

SHA1
980288eef9c38b39973a16c8758f80c5120ac793

SHA256
dd28805fc6f5fd70ddc8c87fe1f5561d8614bdba65284cd6a7c0c73aea427a07

SHA512
fca00c5e7ab884427597d235cc151d769e5b1056bef01012af762f2fe91f1f3ff5ed380f4202409c34b244969a6675e00760ddb2dafe448f8a9b338f1555ec2f

Download Submit
memory/3764-0-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/3764-18-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download

Analysis

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