nymaim | 6999a96ba98cdc49812e7f521866a2d1ff1eab4cb193dd2c7c12bbd7e5d19694

Analysis

max time kernel
119s
max time network
122s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27/09/2022, 07:47

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General

Target
file.exe
Size 406KB
Sample220927-jmh8dschc7
SHA256 6999a96ba98cdc49812e7f521866a2d1ff1eab4cb193dd2c7c12bbd7e5d19694
MD5 7dbf7a50e20b116ee7696a3fd8a4f44a
SHA1 6afcb1011236c5f26a16564208c915013fe05339
SHA512 ad89e275f7ed3f95913ddee15c51e799bf10a80c2b2b16888dc905eb6ff416c13fd200083314fa512f5468439a87c26ec323ce9d3bfec7638884a40caf59f6ea
SSDEEP 6144:cThbcTgybi5oAqRakEO0jlZSpAKycXRPiEmZ0znigabwVf:cT+Tgy+5oAhk0lZsAkHzi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
760	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1040	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1804	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1996	760	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1592	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
360	file.exe
360	file.exe
360	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	760	Cleaner.exe
Token: SeDebugPrivilege	1592	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 360 wrote to memory of 1804	360	file.exe	29
PID 360 wrote to memory of 1804	360	file.exe	29
PID 360 wrote to memory of 1804	360	file.exe	29
PID 360 wrote to memory of 1804	360	file.exe	29
PID 1804 wrote to memory of 760	1804	cmd.exe	31
PID 1804 wrote to memory of 760	1804	cmd.exe	31
PID 1804 wrote to memory of 760	1804	cmd.exe	31
PID 1804 wrote to memory of 760	1804	cmd.exe	31
PID 760 wrote to memory of 1996	760	Cleaner.exe	33
PID 760 wrote to memory of 1996	760	Cleaner.exe	33
PID 760 wrote to memory of 1996	760	Cleaner.exe	33
PID 360 wrote to memory of 1040	360	file.exe	34
PID 360 wrote to memory of 1040	360	file.exe	34
PID 360 wrote to memory of 1040	360	file.exe	34
PID 360 wrote to memory of 1040	360	file.exe	34
PID 1040 wrote to memory of 1592	1040	cmd.exe	36
PID 1040 wrote to memory of 1592	1040	cmd.exe	36
PID 1040 wrote to memory of 1592	1040	cmd.exe	36
PID 1040 wrote to memory of 1592	1040	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\hiIaxRRlwOAm8UX3QWaptdxuT9s\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1804
- - C:\Users\Admin\AppData\Local\Temp\hiIaxRRlwOAm8UX3QWaptdxuT9s\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\hiIaxRRlwOAm8UX3QWaptdxuT9s\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:760
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 760 -s 1144
      4⤵
      Program crash
      PID:1996
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1040
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\hiIaxRRlwOAm8UX3QWaptdxuT9s\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\hiIaxRRlwOAm8UX3QWaptdxuT9s\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\hiIaxRRlwOAm8UX3QWaptdxuT9s\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\hiIaxRRlwOAm8UX3QWaptdxuT9s\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/360-67-0x000000000026E000-0x0000000000294000-memory.dmp

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memory/360-56-0x00000000003C0000-0x00000000003FF000-memory.dmp

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memory/360-57-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/360-55-0x000000000026E000-0x0000000000294000-memory.dmp

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memory/360-75-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/360-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/360-68-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/360-54-0x0000000075771000-0x0000000075773000-memory.dmp

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memory/760-64-0x000007FEFB6A1000-0x000007FEFB6A3000-memory.dmp

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memory/760-66-0x0000000000430000-0x0000000000472000-memory.dmp

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memory/760-63-0x0000000000880000-0x0000000000A02000-memory.dmp

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