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
2140	rundll32.exe

Loads dropped DLL 10 IoCs

pid	Process
2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
2140	rundll32.exe
2140	rundll32.exe
2140	rundll32.exe
2140	rundll32.exe
2140	rundll32.exe
2140	rundll32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2340-0-0x0000000000400000-0x0000000000419000-memory.dmp	upx
behavioral1/memory/2340-20-0x0000000000400000-0x0000000000419000-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
2200	sc.exe
2136	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	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 2216	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	31
PID 2340 wrote to memory of 2216	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	31
PID 2340 wrote to memory of 2216	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	31
PID 2340 wrote to memory of 2216	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	31
PID 2340 wrote to memory of 2200	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2200	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2200	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2200	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2136	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	34
PID 2340 wrote to memory of 2136	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	34
PID 2340 wrote to memory of 2136	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	34
PID 2340 wrote to memory of 2136	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	34
PID 2340 wrote to memory of 2140	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	36
PID 2340 wrote to memory of 2140	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	36
PID 2340 wrote to memory of 2140	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	36
PID 2340 wrote to memory of 2140	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	36
PID 2340 wrote to memory of 2140	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	36
PID 2340 wrote to memory of 2140	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	36
PID 2340 wrote to memory of 2140	2340	dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe	36
PID 2216 wrote to memory of 2748	2216	net.exe	38
PID 2216 wrote to memory of 2748	2216	net.exe	38
PID 2216 wrote to memory of 2748	2216	net.exe	38
PID 2216 wrote to memory of 2748	2216	net.exe	38

C:\Users\Admin\AppData\Local\Temp\dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\dbf56ee3e6aac2e967ca25d1265063cb_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- 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:2340
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2216
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2748
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2200
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2136
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1726121503.dat, ServerMain c:\users\admin\appdata\local\temp\dbf56ee3e6aac2e967ca25d1265063cb_jaffacakes118.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2140

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
14f3e5abf37494b9f9e3c63d863f225b

SHA1
041a026d5f1e81f25f88756c095aeb71e7162ee8

SHA256
d27d3c1028891e0373485fe498ecb6b2f37f3486057452deb88e41fb71cf58a0

SHA512
5a1f1813f9fd8cfb4bda8648cd0acb9d5e3f84aad7847b87827f96b125c52f49b7c2238ba8249aaa5e34b4cf7be6bef7495ebb0f8dddc6f2eeec7a09f2b23f32

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

Filesize
4KB

MD5
9c67f6bbda3881cfd02095160cf91576

SHA1
80de7475e91692dc5bead2cac98f74c1073cd93e

SHA256
6ce97c6f0ad8be183de935a7aab7d46821e8de9e55a4bff54acb49d056826a94

SHA512
eebbd6d0d4f50fbb8ee9e9a7976d06fb6796cce657187c8a1254ca1cf5040ec39cc5b4faed6a8bf79d38e051c9de46b87c38e2318704ae4bef2c2a50e06004d2

Download Submit
\Windows\SysWOW64\chinasougou.ime

Filesize
8KB

MD5
251224cd16c7d500b103cdc6c0e6fc62

SHA1
5fdaa016efccc9ff6a2f41800a006f1adc606944

SHA256
666e8c00cf310cfd2a29088039ab14e0f18cc77b472b812f03a9a563bba221a8

SHA512
8d063bf5fed1f5b9c3f8fd56f7ef1a54fb671b5ae8e92dcfc751eac71cb895a69e7e38abe0e0ce3ea3bd4c4bb2f3ef329ca208b1d5235a5fa2f7515fbb47a053

Download Submit
memory/2340-0-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2340-20-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download

Analysis

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