nymaim | 6845fad8a7b8a7abb86a3f788352c5e856f8863ac3c40f8bc22a112d363c998b

Analysis

max time kernel
138s
max time network
141s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
26/09/2022, 02:45

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General

Target
file.exe
Size 258KB
Sample220926-c8qe9sacap
SHA256 6845fad8a7b8a7abb86a3f788352c5e856f8863ac3c40f8bc22a112d363c998b
MD5 5738eeab4dc44f85629aca4c6236f702
SHA1 b28e072363e63c0047094e8c5d690e064f69abff
SHA512 fb802bb1e42745f48a43b061796031f635629bd43b145f712bad6e46568b0dd3c719353cb651f79e3dc195e8a4a2b39972d72bc8ca9ea0498d57a21826ac5c13
SSDEEP 3072:8nxUsW0naKr35qqKmw93Dk6v86KEXY9/BTaAIbvbdDuPmEPIkAVypQ10O8CFBKcf:GCjVf3jTK9/ELbdDIfWypQ10O8C
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
904	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1172	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
784	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
1072	904	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
760	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1992	file.exe
1992	file.exe
1992	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	904	Cleaner.exe
Token: SeDebugPrivilege	760	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 784	1992	file.exe	29
PID 1992 wrote to memory of 784	1992	file.exe	29
PID 1992 wrote to memory of 784	1992	file.exe	29
PID 1992 wrote to memory of 784	1992	file.exe	29
PID 784 wrote to memory of 904	784	cmd.exe	31
PID 784 wrote to memory of 904	784	cmd.exe	31
PID 784 wrote to memory of 904	784	cmd.exe	31
PID 784 wrote to memory of 904	784	cmd.exe	31
PID 904 wrote to memory of 1072	904	Cleaner.exe	33
PID 904 wrote to memory of 1072	904	Cleaner.exe	33
PID 904 wrote to memory of 1072	904	Cleaner.exe	33
PID 1992 wrote to memory of 1172	1992	file.exe	34
PID 1992 wrote to memory of 1172	1992	file.exe	34
PID 1992 wrote to memory of 1172	1992	file.exe	34
PID 1992 wrote to memory of 1172	1992	file.exe	34
PID 1172 wrote to memory of 760	1172	cmd.exe	36
PID 1172 wrote to memory of 760	1172	cmd.exe	36
PID 1172 wrote to memory of 760	1172	cmd.exe	36
PID 1172 wrote to memory of 760	1172	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:1992
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\cXWvFBfBij\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:784
- - C:\Users\Admin\AppData\Local\Temp\cXWvFBfBij\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\cXWvFBfBij\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:904
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 904 -s 1148
      4⤵
      Program crash
      PID:1072
- 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:1172
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:760

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\cXWvFBfBij\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\cXWvFBfBij\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\cXWvFBfBij\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\cXWvFBfBij\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/904-68-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/904-66-0x000007FEFC001000-0x000007FEFC003000-memory.dmp

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memory/904-65-0x0000000001340000-0x00000000014C0000-memory.dmp

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memory/1992-59-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/1992-58-0x000000000065B000-0x0000000000682000-memory.dmp

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memory/1992-57-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/1992-56-0x00000000002D0000-0x000000000030F000-memory.dmp

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memory/1992-54-0x0000000075AD1000-0x0000000075AD3000-memory.dmp

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memory/1992-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1992-75-0x000000000065B000-0x0000000000682000-memory.dmp

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memory/1992-77-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/1992-55-0x000000000065B000-0x0000000000682000-memory.dmp

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