nymaim | e3851a089459799ddfd0f465120f9d376c3a26cfe0ffaff60696579865d5c099

Analysis

max time kernel
51s
max time network
52s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
20/12/2022, 13:33

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General

Target

file.exe
Size

1.7MB
MD5

08e47bc5b0a0a1085ca584c247c433e4
SHA1

0eecb925c9d42bb2bef9c18a4c2f5f2b446ec5f5
SHA256

e3851a089459799ddfd0f465120f9d376c3a26cfe0ffaff60696579865d5c099
SHA512

e03ec495a09c04d2b26131b6ba69781bf81b6a68b10e7d0f8e1b361f76c8e4489baf298478bac5b70023e9a1613d4d3884877966e55a2b3d8ceeb21181155ef5
SSDEEP

49152:WPKtATb+MU093WTcBTJadtCL/nHaaFpNeViY:WP26b+90tmSwdtCL/HaamiY

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
948	is-JFGFP.tmp
1624	SplitFiles.exe
268	LvvRvnGmjQQc.exe

Loads dropped DLL 10 IoCs

pid	Process
1488	file.exe
948	is-JFGFP.tmp
948	is-JFGFP.tmp
948	is-JFGFP.tmp
948	is-JFGFP.tmp
1624	SplitFiles.exe
1624	SplitFiles.exe
1624	SplitFiles.exe
268	LvvRvnGmjQQc.exe
268	LvvRvnGmjQQc.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\language\is-NQJTA.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-TMNBQ.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\is-R0IFP.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\is-BHP32.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-L5O85.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-LIK2V.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0CMQB.tmp	is-JFGFP.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\is-5ESMQ.tmp	is-JFGFP.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles.exe	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\is-3TIMI.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-O37P8.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-V925C.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-9HNO9.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DUHJQ.tmp	is-JFGFP.tmp
File created	C:\Program Files (x86)\Split Files\is-SEL27.tmp	is-JFGFP.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
888	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1624	SplitFiles.exe
1624	SplitFiles.exe
1624	SplitFiles.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	948	is-JFGFP.tmp
Token: SeBackupPrivilege	948	is-JFGFP.tmp
Token: SeDebugPrivilege	888	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1488 wrote to memory of 948	1488	file.exe	28
PID 1488 wrote to memory of 948	1488	file.exe	28
PID 1488 wrote to memory of 948	1488	file.exe	28
PID 1488 wrote to memory of 948	1488	file.exe	28
PID 1488 wrote to memory of 948	1488	file.exe	28
PID 1488 wrote to memory of 948	1488	file.exe	28
PID 1488 wrote to memory of 948	1488	file.exe	28
PID 948 wrote to memory of 1624	948	is-JFGFP.tmp	29
PID 948 wrote to memory of 1624	948	is-JFGFP.tmp	29
PID 948 wrote to memory of 1624	948	is-JFGFP.tmp	29
PID 948 wrote to memory of 1624	948	is-JFGFP.tmp	29
PID 948 wrote to memory of 1624	948	is-JFGFP.tmp	29
PID 948 wrote to memory of 1624	948	is-JFGFP.tmp	29
PID 948 wrote to memory of 1624	948	is-JFGFP.tmp	29
PID 1624 wrote to memory of 268	1624	SplitFiles.exe	30
PID 1624 wrote to memory of 268	1624	SplitFiles.exe	30
PID 1624 wrote to memory of 268	1624	SplitFiles.exe	30
PID 1624 wrote to memory of 268	1624	SplitFiles.exe	30
PID 1624 wrote to memory of 268	1624	SplitFiles.exe	30
PID 1624 wrote to memory of 268	1624	SplitFiles.exe	30
PID 1624 wrote to memory of 268	1624	SplitFiles.exe	30
PID 1624 wrote to memory of 1268	1624	SplitFiles.exe	33
PID 1624 wrote to memory of 1268	1624	SplitFiles.exe	33
PID 1624 wrote to memory of 1268	1624	SplitFiles.exe	33
PID 1624 wrote to memory of 1268	1624	SplitFiles.exe	33
PID 1624 wrote to memory of 1268	1624	SplitFiles.exe	33
PID 1624 wrote to memory of 1268	1624	SplitFiles.exe	33
PID 1624 wrote to memory of 1268	1624	SplitFiles.exe	33
PID 1268 wrote to memory of 888	1268	cmd.exe	35
PID 1268 wrote to memory of 888	1268	cmd.exe	35
PID 1268 wrote to memory of 888	1268	cmd.exe	35
PID 1268 wrote to memory of 888	1268	cmd.exe	35
PID 1268 wrote to memory of 888	1268	cmd.exe	35
PID 1268 wrote to memory of 888	1268	cmd.exe	35
PID 1268 wrote to memory of 888	1268	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:1488
- C:\Users\Admin\AppData\Local\Temp\is-DU57H.tmp\is-JFGFP.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-DU57H.tmp\is-JFGFP.tmp" /SL4 $80122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1512562 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:948
- - C:\Program Files (x86)\Split Files\SplitFiles.exe
    "C:\Program Files (x86)\Split Files\SplitFiles.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1624
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\LvvRvnGmjQQc.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:268
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1268
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:888

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\SplitFiles.exe

Filesize
3.0MB

MD5
ef9eb0152973eba073935166ff64247b

SHA1
07e15157ac9f6bef2a9337a08e0823820ff08438

SHA256
5aef506b3f235320fc842065eafa202b894a99f51a41e3efbadf36a35a8d9a01

SHA512
ada9fe50283e28a984b2ac22e7b3fc50ac4e0bcc6e036777a3f187e8eb5b4a3e44ace612fedb0ff0b97356f0f389423fc3d3431bbcf46c704fec587884776d7c

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

Filesize
3.0MB

MD5
ef9eb0152973eba073935166ff64247b

SHA1
07e15157ac9f6bef2a9337a08e0823820ff08438

SHA256
5aef506b3f235320fc842065eafa202b894a99f51a41e3efbadf36a35a8d9a01

SHA512
ada9fe50283e28a984b2ac22e7b3fc50ac4e0bcc6e036777a3f187e8eb5b4a3e44ace612fedb0ff0b97356f0f389423fc3d3431bbcf46c704fec587884776d7c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-DU57H.tmp\is-JFGFP.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-DU57H.tmp\is-JFGFP.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
3.0MB

MD5
ef9eb0152973eba073935166ff64247b

SHA1
07e15157ac9f6bef2a9337a08e0823820ff08438

SHA256
5aef506b3f235320fc842065eafa202b894a99f51a41e3efbadf36a35a8d9a01

SHA512
ada9fe50283e28a984b2ac22e7b3fc50ac4e0bcc6e036777a3f187e8eb5b4a3e44ace612fedb0ff0b97356f0f389423fc3d3431bbcf46c704fec587884776d7c

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

Filesize
3.0MB

MD5
ef9eb0152973eba073935166ff64247b

SHA1
07e15157ac9f6bef2a9337a08e0823820ff08438

SHA256
5aef506b3f235320fc842065eafa202b894a99f51a41e3efbadf36a35a8d9a01

SHA512
ada9fe50283e28a984b2ac22e7b3fc50ac4e0bcc6e036777a3f187e8eb5b4a3e44ace612fedb0ff0b97356f0f389423fc3d3431bbcf46c704fec587884776d7c

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

Filesize
3.0MB

MD5
ef9eb0152973eba073935166ff64247b

SHA1
07e15157ac9f6bef2a9337a08e0823820ff08438

SHA256
5aef506b3f235320fc842065eafa202b894a99f51a41e3efbadf36a35a8d9a01

SHA512
ada9fe50283e28a984b2ac22e7b3fc50ac4e0bcc6e036777a3f187e8eb5b4a3e44ace612fedb0ff0b97356f0f389423fc3d3431bbcf46c704fec587884776d7c

Download Submit
\Users\Admin\AppData\Local\Temp\is-DU57H.tmp\is-JFGFP.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
\Users\Admin\AppData\Local\Temp\is-M5D9K.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-M5D9K.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-M5D9K.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}\LvvRvnGmjQQc.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/948-70-0x0000000003800000-0x000000000490C000-memory.dmp

Filesize
17.0MB

Download
memory/948-90-0x0000000003800000-0x000000000490C000-memory.dmp

Filesize
17.0MB

Download
memory/1488-68-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1488-97-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1488-54-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/1488-55-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1624-77-0x0000000000400000-0x000000000150C000-memory.dmp

Filesize
17.0MB

Download
memory/1624-86-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1624-78-0x0000000000400000-0x000000000150C000-memory.dmp

Filesize
17.0MB

Download
memory/1624-91-0x0000000000400000-0x000000000150C000-memory.dmp

Filesize
17.0MB

Download
memory/1624-92-0x0000000001C60000-0x0000000002D6C000-memory.dmp

Filesize
17.0MB

Download
memory/1624-71-0x0000000000400000-0x000000000150C000-memory.dmp

Filesize
17.0MB

Download
memory/1624-96-0x0000000000400000-0x000000000150C000-memory.dmp

Filesize
17.0MB

Download
memory/1624-76-0x0000000001C60000-0x0000000002D6C000-memory.dmp

Filesize
17.0MB

Download
memory/1624-75-0x0000000001C60000-0x0000000002D6C000-memory.dmp

Filesize
17.0MB

Download