b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4

General

Target

b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4.exe
Size

160KB
MD5

a24c3942c7f5c15c99c5a8c34c8f6a1f
SHA1

dfc3416e030e9b84e883d82fadbd0ee300c66464
SHA256

b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4
SHA512

d1e82664679636eeadd831b4d29814f97055f5418a532ab0192fde0c8d293a5ad3ceadd72a403f41c7c52cc7d92407a7fe565c866a882719a9150d36c862a2ed
SSDEEP

3072:eqPL1/7w6ZAs+VBKbp6v7ag0Z2rDk7gkVzNJz:rQVAp6ja74Dksk7J

Score

8^/10

aspackv2 persistence upx

Malware Config

Signatures

ASPack v2.12-2.42 4 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x000d000000022e3a-134.dat	aspack_v212_v242
behavioral2/files/0x000d000000022e3a-135.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e47-140.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e47-141.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
4480	25c05025.exe

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\FastUserSwitchingCompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\FastUserSwitchingCompatibility.dll"	25c05025.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000d000000022e3a-134.dat	upx
behavioral2/files/0x000d000000022e3a-135.dat	upx
behavioral2/memory/4480-136-0x00000000005C0000-0x00000000005E3000-memory.dmp	upx
behavioral2/memory/4480-137-0x00000000005C0000-0x00000000005E3000-memory.dmp	upx
behavioral2/memory/4480-138-0x00000000005C0000-0x00000000005E3000-memory.dmp	upx
behavioral2/files/0x0006000000022e47-140.dat	upx
behavioral2/memory/380-143-0x00000000750C0000-0x00000000750E3000-memory.dmp	upx
behavioral2/memory/380-145-0x00000000750C0000-0x00000000750E3000-memory.dmp	upx
behavioral2/memory/380-142-0x00000000750C0000-0x00000000750E3000-memory.dmp	upx
behavioral2/files/0x0006000000022e47-141.dat	upx

Loads dropped DLL 1 IoCs

pid	Process
380	Svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\03A9089C.tmp	25c05025.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	25c05025.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4480	25c05025.exe
4480	25c05025.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 4480	2500	b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4.exe	80
PID 2500 wrote to memory of 4480	2500	b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4.exe	80
PID 2500 wrote to memory of 4480	2500	b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4.exe	80

C:\Users\Admin\AppData\Local\Temp\b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4.exe
"C:\Users\Admin\AppData\Local\Temp\b36d502eae3680fdd25acaf8c072e4e8c604860c34ba21bdd2ebafa845eff5f4.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2500
- C:\25c05025.exe
  C:\25c05025.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:4480

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:380

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\25c05025.exe

Filesize
80KB

MD5
f9eb547d634c2b2532b103b3c1e4f9fe

SHA1
609d34725a0d254853141738320ef92c39685ecc

SHA256
783c7a9830466d9f94a06382a25622a6b26349a2545c6f9eacb6529584497cf8

SHA512
6aa64760d9a90d4d0ff46d13c0491b9a32b0f0edeea74ffcce13d45d031b54d09b29c05c5110f73ca63a253fcb0900d9722a600917497b8eff5ba4c45cdd07a8

Download Submit
C:\25c05025.exe

Filesize
80KB

MD5
f9eb547d634c2b2532b103b3c1e4f9fe

SHA1
609d34725a0d254853141738320ef92c39685ecc

SHA256
783c7a9830466d9f94a06382a25622a6b26349a2545c6f9eacb6529584497cf8

SHA512
6aa64760d9a90d4d0ff46d13c0491b9a32b0f0edeea74ffcce13d45d031b54d09b29c05c5110f73ca63a253fcb0900d9722a600917497b8eff5ba4c45cdd07a8

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
02f66b1f34829f6b9cbbad8aad6f30a6

SHA1
5d9bc86c87f0c243d3974bf2784bf59c85d024c4

SHA256
d95951a1d88553773d91bd52af5c0392983ec43f801db6ad0a0e75bfa7f02e44

SHA512
6d73d097f131e901319af63f8dd082605d10eff30f6d956eb0c5c629df2d1db4f3083ff454425c0e09698502e32f8fff81c4301eef433b5e4da0841398d09247

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

Filesize
80KB

MD5
1b7d880628fce43d3db181b77983e17a

SHA1
8d98ec65f3e305af44a3d6fb3db8c325a2fcbd50

SHA256
6b4c32b802614fe24832c11be0d650e8a5d21ba692704418849a82e98092d554

SHA512
3ade907facda6676e9714aa03c7e84e4c8d9bc40cacdb9945d750d25a83fd2f8e94f35333e64d4256ee3204b3c29deb97772ff1ac49638541a11488dab7a6c62

Download Submit
\??\c:\windows\SysWOW64\fastuserswitchingcompatibility.dll

Filesize
80KB

MD5
1b7d880628fce43d3db181b77983e17a

SHA1
8d98ec65f3e305af44a3d6fb3db8c325a2fcbd50

SHA256
6b4c32b802614fe24832c11be0d650e8a5d21ba692704418849a82e98092d554

SHA512
3ade907facda6676e9714aa03c7e84e4c8d9bc40cacdb9945d750d25a83fd2f8e94f35333e64d4256ee3204b3c29deb97772ff1ac49638541a11488dab7a6c62

Download Submit
memory/380-143-0x00000000750C0000-0x00000000750E3000-memory.dmp

Filesize
140KB

Download
memory/380-145-0x00000000750C0000-0x00000000750E3000-memory.dmp

Filesize
140KB

Download
memory/380-142-0x00000000750C0000-0x00000000750E3000-memory.dmp

Filesize
140KB

Download
memory/2500-132-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/2500-146-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/4480-138-0x00000000005C0000-0x00000000005E3000-memory.dmp

Filesize
140KB

Download
memory/4480-139-0x00000000030F0000-0x00000000070F0000-memory.dmp

Filesize
64.0MB

Download
memory/4480-137-0x00000000005C0000-0x00000000005E3000-memory.dmp

Filesize
140KB

Download
memory/4480-136-0x00000000005C0000-0x00000000005E3000-memory.dmp

Filesize
140KB

Download
memory/4480-133-0x0000000000000000-mapping.dmp

Download

Analysis

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