nymaim | 37ba29cfabde1cbdfea06e90f92af1c29f1fed73c3e9709831498d03cf993010

Analysis

max time kernel
136s
max time network
154s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
02/10/2022, 08:22

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General

Target
file.exe
Size 220KB
Sample221002-j9kdzagfbr
SHA256 37ba29cfabde1cbdfea06e90f92af1c29f1fed73c3e9709831498d03cf993010
MD5 b56cf3052fc80bc29dba52b8296e3deb
SHA1 3c03c0a076f93c6527e7db32c712389b50b57217
SHA512 2db2b677fbd106f5b4af36a669b05dc6b3d10e8cdc900e5b30ade323be55ca08b8b95cb6825255dd50edf35beff9368cb7b7ef751f3e1cd8d59c4126f9a5ce27
SSDEEP 3072:KXdsRxjRzgZrPmEy6+NnryrKCHaL+FPzzV3S1cuCZfebPmcEKKvLW+S+AAf7r:qrZjK/cKC6aFPzzV3nuluKsW+S+Ao7
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
1156	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
568	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1756	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
1984	1156	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
584	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1672	file.exe
1672	file.exe
1672	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1156	Cleaner.exe
Token: SeDebugPrivilege	584	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1756	1672	file.exe	29
PID 1672 wrote to memory of 1756	1672	file.exe	29
PID 1672 wrote to memory of 1756	1672	file.exe	29
PID 1672 wrote to memory of 1756	1672	file.exe	29
PID 1756 wrote to memory of 1156	1756	cmd.exe	31
PID 1756 wrote to memory of 1156	1756	cmd.exe	31
PID 1756 wrote to memory of 1156	1756	cmd.exe	31
PID 1756 wrote to memory of 1156	1756	cmd.exe	31
PID 1156 wrote to memory of 1984	1156	Cleaner.exe	33
PID 1156 wrote to memory of 1984	1156	Cleaner.exe	33
PID 1156 wrote to memory of 1984	1156	Cleaner.exe	33
PID 1672 wrote to memory of 568	1672	file.exe	34
PID 1672 wrote to memory of 568	1672	file.exe	34
PID 1672 wrote to memory of 568	1672	file.exe	34
PID 1672 wrote to memory of 568	1672	file.exe	34
PID 568 wrote to memory of 584	568	cmd.exe	36
PID 568 wrote to memory of 584	568	cmd.exe	36
PID 568 wrote to memory of 584	568	cmd.exe	36
PID 568 wrote to memory of 584	568	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:1672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\o9ExHzzUF4bgv9pJFUHCbOfzbdH\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1756
- - C:\Users\Admin\AppData\Local\Temp\o9ExHzzUF4bgv9pJFUHCbOfzbdH\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\o9ExHzzUF4bgv9pJFUHCbOfzbdH\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1156
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1156 -s 1148
      4⤵
      Program crash
      PID:1984
- 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:568
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:584

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\o9ExHzzUF4bgv9pJFUHCbOfzbdH\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\o9ExHzzUF4bgv9pJFUHCbOfzbdH\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\o9ExHzzUF4bgv9pJFUHCbOfzbdH\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\o9ExHzzUF4bgv9pJFUHCbOfzbdH\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/1156-64-0x0000000000840000-0x0000000000998000-memory.dmp

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memory/1156-67-0x0000000000560000-0x00000000005A2000-memory.dmp

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memory/1156-65-0x000007FEFBC01000-0x000007FEFBC03000-memory.dmp

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memory/1672-69-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1672-58-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/1672-57-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/1672-54-0x0000000075BD1000-0x0000000075BD3000-memory.dmp

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memory/1672-55-0x000000000076D000-0x0000000000794000-memory.dmp

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memory/1672-74-0x000000000076D000-0x0000000000794000-memory.dmp

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memory/1672-75-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/1672-56-0x0000000000220000-0x000000000025F000-memory.dmp

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