nymaim | 057268fbf3629abc052557835338b42fb91b15eb6e88aaa4488c7be2db6b32f5

Analysis

max time kernel
62s
max time network
64s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27/12/2022, 14:54

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General

Target

file.exe
Size

1.9MB
MD5

dc1dcb5e7ae3fafd54a7d2619eb7caef
SHA1

830ea60df55b51c4fbfea794773859a0e8bc591f
SHA256

057268fbf3629abc052557835338b42fb91b15eb6e88aaa4488c7be2db6b32f5
SHA512

00664c91bad7f127b926ca9991a180d96a006694eaa4302a1472028a50151e5adf6e24aea6b0a1ad24057ec1dee0035d0491df3c8bc638a9f9f2a5dd46809a22
SSDEEP

49152:GiPqfbw7UK5F6LPsahNL8aB5Ch6CGl/4cZ:GiifkJGU48a/Ch6hL

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
1988	is-D76VQ.tmp
952	SplitFiles122.exe
1184	Wqn6awb.exe

Loads dropped DLL 10 IoCs

pid	Process
756	file.exe
1988	is-D76VQ.tmp
1988	is-D76VQ.tmp
1988	is-D76VQ.tmp
1988	is-D76VQ.tmp
952	SplitFiles122.exe
952	SplitFiles122.exe
952	SplitFiles122.exe
1184	Wqn6awb.exe
1184	Wqn6awb.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\is-2HVK9.tmp	is-D76VQ.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles122.exe	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-SCH67.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-JSTI0.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\is-9Q0F8.tmp	is-D76VQ.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\is-LKNRJ.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\is-DSAV5.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-7S7P7.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-EBLGF.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ELA0T.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-F95FL.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-TQ8EN.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-BI5E5.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\language\is-2JOBF.tmp	is-D76VQ.tmp
File created	C:\Program Files (x86)\Split Files\is-T653D.tmp	is-D76VQ.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1596	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
952	SplitFiles122.exe
952	SplitFiles122.exe
952	SplitFiles122.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1596	taskkill.exe
Token: SeRestorePrivilege	1988	is-D76VQ.tmp
Token: SeBackupPrivilege	1988	is-D76VQ.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 756 wrote to memory of 1988	756	file.exe	28
PID 756 wrote to memory of 1988	756	file.exe	28
PID 756 wrote to memory of 1988	756	file.exe	28
PID 756 wrote to memory of 1988	756	file.exe	28
PID 756 wrote to memory of 1988	756	file.exe	28
PID 756 wrote to memory of 1988	756	file.exe	28
PID 756 wrote to memory of 1988	756	file.exe	28
PID 1988 wrote to memory of 952	1988	is-D76VQ.tmp	29
PID 1988 wrote to memory of 952	1988	is-D76VQ.tmp	29
PID 1988 wrote to memory of 952	1988	is-D76VQ.tmp	29
PID 1988 wrote to memory of 952	1988	is-D76VQ.tmp	29
PID 1988 wrote to memory of 952	1988	is-D76VQ.tmp	29
PID 1988 wrote to memory of 952	1988	is-D76VQ.tmp	29
PID 1988 wrote to memory of 952	1988	is-D76VQ.tmp	29
PID 952 wrote to memory of 1184	952	SplitFiles122.exe	30
PID 952 wrote to memory of 1184	952	SplitFiles122.exe	30
PID 952 wrote to memory of 1184	952	SplitFiles122.exe	30
PID 952 wrote to memory of 1184	952	SplitFiles122.exe	30
PID 952 wrote to memory of 1184	952	SplitFiles122.exe	30
PID 952 wrote to memory of 1184	952	SplitFiles122.exe	30
PID 952 wrote to memory of 1184	952	SplitFiles122.exe	30
PID 952 wrote to memory of 1908	952	SplitFiles122.exe	33
PID 952 wrote to memory of 1908	952	SplitFiles122.exe	33
PID 952 wrote to memory of 1908	952	SplitFiles122.exe	33
PID 952 wrote to memory of 1908	952	SplitFiles122.exe	33
PID 952 wrote to memory of 1908	952	SplitFiles122.exe	33
PID 952 wrote to memory of 1908	952	SplitFiles122.exe	33
PID 952 wrote to memory of 1908	952	SplitFiles122.exe	33
PID 1908 wrote to memory of 1596	1908	cmd.exe	35
PID 1908 wrote to memory of 1596	1908	cmd.exe	35
PID 1908 wrote to memory of 1596	1908	cmd.exe	35
PID 1908 wrote to memory of 1596	1908	cmd.exe	35
PID 1908 wrote to memory of 1596	1908	cmd.exe	35
PID 1908 wrote to memory of 1596	1908	cmd.exe	35
PID 1908 wrote to memory of 1596	1908	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:756
- C:\Users\Admin\AppData\Local\Temp\is-28BDI.tmp\is-D76VQ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-28BDI.tmp\is-D76VQ.tmp" /SL4 $80126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1706914 181760
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1988
- - C:\Program Files (x86)\Split Files\SplitFiles122.exe
    "C:\Program Files (x86)\Split Files\SplitFiles122.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:952
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Wqn6awb.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1184
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles122.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles122.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1908
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles122.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1596

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Split Files\SplitFiles122.exe

Filesize
3.2MB

MD5
577c818da1a16318a9f005bea3b28ffd

SHA1
f5f206ea7c7f7b2499f5fc2720f4cb203de2e11c

SHA256
6d454ef98ee94ecc5ac010265b77540f2a9934875b2e78061d4647fe75ed7b7b

SHA512
635a44afd340076ba8d03c000223947318a35063f7131d6644c663c93d45ec45402fa2896e1ecf22b69c4f905c7a01c394997f80371e2a7530204a6d9bbd68b8

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles122.exe

Filesize
3.2MB

MD5
577c818da1a16318a9f005bea3b28ffd

SHA1
f5f206ea7c7f7b2499f5fc2720f4cb203de2e11c

SHA256
6d454ef98ee94ecc5ac010265b77540f2a9934875b2e78061d4647fe75ed7b7b

SHA512
635a44afd340076ba8d03c000223947318a35063f7131d6644c663c93d45ec45402fa2896e1ecf22b69c4f905c7a01c394997f80371e2a7530204a6d9bbd68b8

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-28BDI.tmp\is-D76VQ.tmp

Filesize
771KB

MD5
1d2b717acbb855c26277c671c91bf0d8

SHA1
068a69f8ba021451b1796334dca33d5de53d7a05

SHA256
4ed952a9e264f273b731350e776a4428a2d84a31f3287587f6c74b232b4b5808

SHA512
fb93c58c4c4b10a638e40bf6d668e89e52ce4df4d0d350f2cd6132b713082df7a8c22a135f931e462b2238934f2c254d7d7f4925f75e817ac225914de6727a3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-28BDI.tmp\is-D76VQ.tmp

Filesize
771KB

MD5
1d2b717acbb855c26277c671c91bf0d8

SHA1
068a69f8ba021451b1796334dca33d5de53d7a05

SHA256
4ed952a9e264f273b731350e776a4428a2d84a31f3287587f6c74b232b4b5808

SHA512
fb93c58c4c4b10a638e40bf6d668e89e52ce4df4d0d350f2cd6132b713082df7a8c22a135f931e462b2238934f2c254d7d7f4925f75e817ac225914de6727a3e

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Wqn6awb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Wqn6awb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles122.exe

Filesize
3.2MB

MD5
577c818da1a16318a9f005bea3b28ffd

SHA1
f5f206ea7c7f7b2499f5fc2720f4cb203de2e11c

SHA256
6d454ef98ee94ecc5ac010265b77540f2a9934875b2e78061d4647fe75ed7b7b

SHA512
635a44afd340076ba8d03c000223947318a35063f7131d6644c663c93d45ec45402fa2896e1ecf22b69c4f905c7a01c394997f80371e2a7530204a6d9bbd68b8

Download Submit
\Program Files (x86)\Split Files\SplitFiles122.exe

Filesize
3.2MB

MD5
577c818da1a16318a9f005bea3b28ffd

SHA1
f5f206ea7c7f7b2499f5fc2720f4cb203de2e11c

SHA256
6d454ef98ee94ecc5ac010265b77540f2a9934875b2e78061d4647fe75ed7b7b

SHA512
635a44afd340076ba8d03c000223947318a35063f7131d6644c663c93d45ec45402fa2896e1ecf22b69c4f905c7a01c394997f80371e2a7530204a6d9bbd68b8

Download Submit
\Program Files (x86)\Split Files\SplitFiles122.exe

Filesize
3.2MB

MD5
577c818da1a16318a9f005bea3b28ffd

SHA1
f5f206ea7c7f7b2499f5fc2720f4cb203de2e11c

SHA256
6d454ef98ee94ecc5ac010265b77540f2a9934875b2e78061d4647fe75ed7b7b

SHA512
635a44afd340076ba8d03c000223947318a35063f7131d6644c663c93d45ec45402fa2896e1ecf22b69c4f905c7a01c394997f80371e2a7530204a6d9bbd68b8

Download Submit
\Users\Admin\AppData\Local\Temp\is-28BDI.tmp\is-D76VQ.tmp

Filesize
771KB

MD5
1d2b717acbb855c26277c671c91bf0d8

SHA1
068a69f8ba021451b1796334dca33d5de53d7a05

SHA256
4ed952a9e264f273b731350e776a4428a2d84a31f3287587f6c74b232b4b5808

SHA512
fb93c58c4c4b10a638e40bf6d668e89e52ce4df4d0d350f2cd6132b713082df7a8c22a135f931e462b2238934f2c254d7d7f4925f75e817ac225914de6727a3e

Download Submit
\Users\Admin\AppData\Local\Temp\is-7F6MU.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-7F6MU.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-7F6MU.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Wqn6awb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Wqn6awb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Wqn6awb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/756-68-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/756-98-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/756-54-0x0000000075831000-0x0000000075833000-memory.dmp

Filesize
8KB

Download
memory/756-55-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/952-77-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/952-88-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/952-97-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/952-92-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/952-76-0x0000000001BA0000-0x0000000002CCF000-memory.dmp

Filesize
17.2MB

Download
memory/952-75-0x0000000001BA0000-0x0000000002CCF000-memory.dmp

Filesize
17.2MB

Download
memory/952-74-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/952-78-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/952-87-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/1988-86-0x00000000038B0000-0x00000000049DF000-memory.dmp

Filesize
17.2MB

Download
memory/1988-73-0x00000000038B0000-0x00000000049DF000-memory.dmp

Filesize
17.2MB

Download