nymaim | d3b573beaa874b2eb5ffc897796ebaee26bbdd64800348492e0b0f587cb84b0d

Analysis

max time kernel
117s
max time network
119s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
24/09/2022, 15:43

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General

Target
file.exe
Size 284KB
Sample220924-s5w2msbef2
SHA256 d3b573beaa874b2eb5ffc897796ebaee26bbdd64800348492e0b0f587cb84b0d
MD5 2df5f63d6ebb4180785f654685d98b32
SHA1 24752fe0b22befc81e6f47fa5ab093057c998ba0
SHA512 999225655aa376b924361760c9ac503312c602de4e129b68034b8b5249cb9595cea49714f38dee76d66dc2446143815431e7a5c0f1778ec250ccc8cfc494db6a
SSDEEP 3072:WvSmXLg/Ch8rb5LKBvtIC+K937KwRDdO+nJPRB6MAW/p66w1UTbv3HWVtr/3zIFX:QXL3h8VKBvt6WOkpbnJPRFD/nvb/WVt
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
1160	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1772	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1816	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
1612	1160	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
528	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
456	file.exe
456	file.exe
456	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1160	Cleaner.exe
Token: SeDebugPrivilege	528	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 1816	456	file.exe	30
PID 456 wrote to memory of 1816	456	file.exe	30
PID 456 wrote to memory of 1816	456	file.exe	30
PID 456 wrote to memory of 1816	456	file.exe	30
PID 1816 wrote to memory of 1160	1816	cmd.exe	32
PID 1816 wrote to memory of 1160	1816	cmd.exe	32
PID 1816 wrote to memory of 1160	1816	cmd.exe	32
PID 1816 wrote to memory of 1160	1816	cmd.exe	32
PID 1160 wrote to memory of 1612	1160	Cleaner.exe	34
PID 1160 wrote to memory of 1612	1160	Cleaner.exe	34
PID 1160 wrote to memory of 1612	1160	Cleaner.exe	34
PID 456 wrote to memory of 1772	456	file.exe	35
PID 456 wrote to memory of 1772	456	file.exe	35
PID 456 wrote to memory of 1772	456	file.exe	35
PID 456 wrote to memory of 1772	456	file.exe	35
PID 1772 wrote to memory of 528	1772	cmd.exe	37
PID 1772 wrote to memory of 528	1772	cmd.exe	37
PID 1772 wrote to memory of 528	1772	cmd.exe	37
PID 1772 wrote to memory of 528	1772	cmd.exe	37

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:456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\EvZmmGY94boG7vtWXOzPj\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1816
- - C:\Users\Admin\AppData\Local\Temp\EvZmmGY94boG7vtWXOzPj\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\EvZmmGY94boG7vtWXOzPj\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1160
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1160 -s 1156
      4⤵
      Program crash
      PID:1612
- 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:1772
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:528

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\EvZmmGY94boG7vtWXOzPj\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\EvZmmGY94boG7vtWXOzPj\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\EvZmmGY94boG7vtWXOzPj\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\EvZmmGY94boG7vtWXOzPj\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/456-76-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/456-68-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/456-57-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/456-55-0x000000000075B000-0x0000000000782000-memory.dmp

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memory/456-75-0x000000000075B000-0x0000000000782000-memory.dmp

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memory/456-54-0x0000000074F01000-0x0000000074F03000-memory.dmp

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memory/456-56-0x0000000000220000-0x000000000025F000-memory.dmp

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memory/456-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/456-67-0x000000000075B000-0x0000000000782000-memory.dmp

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memory/1160-64-0x000007FEFB8A1000-0x000007FEFB8A3000-memory.dmp

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memory/1160-66-0x0000000000590000-0x00000000005D2000-memory.dmp

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memory/1160-63-0x00000000001A0000-0x0000000000320000-memory.dmp

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