nymaim | 8e3c53be955a39706853a6fa0d3e11d12c57092d6fdc5926bd5d9b1875551341

Analysis

max time kernel
64s
max time network
66s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
29/12/2022, 12:16

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General

Target

file.exe
Size

1.9MB
MD5

ba1d8b54bb381d8b4694806d1c325696
SHA1

5067a25cd96a8d628123f02d5fbd12f08764609a
SHA256

8e3c53be955a39706853a6fa0d3e11d12c57092d6fdc5926bd5d9b1875551341
SHA512

353b4223e5bf6156c698d38c8f582925f521dd63232fe1df43948de18e950a79305bd3b20662ba3af92f4c0f0b90f537971d70ca19917c4a6c1fbf7c2c49324c
SSDEEP

49152:FitsjBjNNy2mWdKTc4sNcj2al3YDDpEhkTxu+4+Hth963:FitsV7y2GSkOZ19u+4+HtHC

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
308	is-ETKNS.tmp
2044	SplitFiles124.exe
2000	wEN1bzsOyy.exe

Loads dropped DLL 10 IoCs

pid	Process
1112	file.exe
308	is-ETKNS.tmp
308	is-ETKNS.tmp
308	is-ETKNS.tmp
308	is-ETKNS.tmp
2044	SplitFiles124.exe
2044	SplitFiles124.exe
2044	SplitFiles124.exe
2000	wEN1bzsOyy.exe
2000	wEN1bzsOyy.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-QKNAB.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\is-VQN0E.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\is-M6AGA.tmp	is-ETKNS.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-ETKNS.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles124.exe	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\is-MGJG9.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-MNKEN.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1NK85.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-SHT4C.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-BQJ65.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-B8J3E.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0QBGG.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\is-CPM12.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\is-RTBLV.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-13H1P.tmp	is-ETKNS.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KCH40.tmp	is-ETKNS.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
1084	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2044	SplitFiles124.exe
2044	SplitFiles124.exe
2044	SplitFiles124.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1084	taskkill.exe
Token: SeRestorePrivilege	308	is-ETKNS.tmp
Token: SeBackupPrivilege	308	is-ETKNS.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1112 wrote to memory of 308	1112	file.exe	28
PID 1112 wrote to memory of 308	1112	file.exe	28
PID 1112 wrote to memory of 308	1112	file.exe	28
PID 1112 wrote to memory of 308	1112	file.exe	28
PID 1112 wrote to memory of 308	1112	file.exe	28
PID 1112 wrote to memory of 308	1112	file.exe	28
PID 1112 wrote to memory of 308	1112	file.exe	28
PID 308 wrote to memory of 2044	308	is-ETKNS.tmp	29
PID 308 wrote to memory of 2044	308	is-ETKNS.tmp	29
PID 308 wrote to memory of 2044	308	is-ETKNS.tmp	29
PID 308 wrote to memory of 2044	308	is-ETKNS.tmp	29
PID 308 wrote to memory of 2044	308	is-ETKNS.tmp	29
PID 308 wrote to memory of 2044	308	is-ETKNS.tmp	29
PID 308 wrote to memory of 2044	308	is-ETKNS.tmp	29
PID 2044 wrote to memory of 2000	2044	SplitFiles124.exe	30
PID 2044 wrote to memory of 2000	2044	SplitFiles124.exe	30
PID 2044 wrote to memory of 2000	2044	SplitFiles124.exe	30
PID 2044 wrote to memory of 2000	2044	SplitFiles124.exe	30
PID 2044 wrote to memory of 2000	2044	SplitFiles124.exe	30
PID 2044 wrote to memory of 2000	2044	SplitFiles124.exe	30
PID 2044 wrote to memory of 2000	2044	SplitFiles124.exe	30
PID 2044 wrote to memory of 1216	2044	SplitFiles124.exe	33
PID 2044 wrote to memory of 1216	2044	SplitFiles124.exe	33
PID 2044 wrote to memory of 1216	2044	SplitFiles124.exe	33
PID 2044 wrote to memory of 1216	2044	SplitFiles124.exe	33
PID 2044 wrote to memory of 1216	2044	SplitFiles124.exe	33
PID 2044 wrote to memory of 1216	2044	SplitFiles124.exe	33
PID 2044 wrote to memory of 1216	2044	SplitFiles124.exe	33
PID 1216 wrote to memory of 1084	1216	cmd.exe	35
PID 1216 wrote to memory of 1084	1216	cmd.exe	35
PID 1216 wrote to memory of 1084	1216	cmd.exe	35
PID 1216 wrote to memory of 1084	1216	cmd.exe	35
PID 1216 wrote to memory of 1084	1216	cmd.exe	35
PID 1216 wrote to memory of 1084	1216	cmd.exe	35
PID 1216 wrote to memory of 1084	1216	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:1112
- C:\Users\Admin\AppData\Local\Temp\is-LIACU.tmp\is-ETKNS.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-LIACU.tmp\is-ETKNS.tmp" /SL4 $60126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1672094 166400
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:308
- - C:\Program Files (x86)\Split Files\SplitFiles124.exe
    "C:\Program Files (x86)\Split Files\SplitFiles124.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2044
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\wEN1bzsOyy.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:2000
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles124.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles124.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1216
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles124.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1084

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\SplitFiles124.exe

Filesize
3.2MB

MD5
b232e442fc2fc2ac7b0708471ca032e3

SHA1
10759971918b313c4866168e1681625308f9b8b9

SHA256
dfd2b299a0848483f04e1f24dc0d05f4996fff927d9ee79adb481a6e38dd5f3c

SHA512
b5e6e9bf4d757b8e3ea2197f3d6c10ea98762682f94060bb883f201c76c550227b0aef86b951d760e86c430cd63efbce682e1245f151c6a0180b07464522f63e

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
b232e442fc2fc2ac7b0708471ca032e3

SHA1
10759971918b313c4866168e1681625308f9b8b9

SHA256
dfd2b299a0848483f04e1f24dc0d05f4996fff927d9ee79adb481a6e38dd5f3c

SHA512
b5e6e9bf4d757b8e3ea2197f3d6c10ea98762682f94060bb883f201c76c550227b0aef86b951d760e86c430cd63efbce682e1245f151c6a0180b07464522f63e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LIACU.tmp\is-ETKNS.tmp

Filesize
756KB

MD5
88c7387a76635a30298c1fea18eb963d

SHA1
8a01e609d9f076fd09ec9eec99b512c3571efdbc

SHA256
0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b

SHA512
e3d7736fa09f81ff239ce20b9c7cfacc171b63a215f5658c0de9f57dfbb4b9fb7dd96875ecacd7e652d06ff100fa4f7fca63ba2688d48b122bf03c8dbd08ad2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LIACU.tmp\is-ETKNS.tmp

Filesize
756KB

MD5
88c7387a76635a30298c1fea18eb963d

SHA1
8a01e609d9f076fd09ec9eec99b512c3571efdbc

SHA256
0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b

SHA512
e3d7736fa09f81ff239ce20b9c7cfacc171b63a215f5658c0de9f57dfbb4b9fb7dd96875ecacd7e652d06ff100fa4f7fca63ba2688d48b122bf03c8dbd08ad2b

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\wEN1bzsOyy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\wEN1bzsOyy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
b232e442fc2fc2ac7b0708471ca032e3

SHA1
10759971918b313c4866168e1681625308f9b8b9

SHA256
dfd2b299a0848483f04e1f24dc0d05f4996fff927d9ee79adb481a6e38dd5f3c

SHA512
b5e6e9bf4d757b8e3ea2197f3d6c10ea98762682f94060bb883f201c76c550227b0aef86b951d760e86c430cd63efbce682e1245f151c6a0180b07464522f63e

Download Submit
\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
b232e442fc2fc2ac7b0708471ca032e3

SHA1
10759971918b313c4866168e1681625308f9b8b9

SHA256
dfd2b299a0848483f04e1f24dc0d05f4996fff927d9ee79adb481a6e38dd5f3c

SHA512
b5e6e9bf4d757b8e3ea2197f3d6c10ea98762682f94060bb883f201c76c550227b0aef86b951d760e86c430cd63efbce682e1245f151c6a0180b07464522f63e

Download Submit
\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
b232e442fc2fc2ac7b0708471ca032e3

SHA1
10759971918b313c4866168e1681625308f9b8b9

SHA256
dfd2b299a0848483f04e1f24dc0d05f4996fff927d9ee79adb481a6e38dd5f3c

SHA512
b5e6e9bf4d757b8e3ea2197f3d6c10ea98762682f94060bb883f201c76c550227b0aef86b951d760e86c430cd63efbce682e1245f151c6a0180b07464522f63e

Download Submit
\Users\Admin\AppData\Local\Temp\is-F033B.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-F033B.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-F033B.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-LIACU.tmp\is-ETKNS.tmp

Filesize
756KB

MD5
88c7387a76635a30298c1fea18eb963d

SHA1
8a01e609d9f076fd09ec9eec99b512c3571efdbc

SHA256
0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b

SHA512
e3d7736fa09f81ff239ce20b9c7cfacc171b63a215f5658c0de9f57dfbb4b9fb7dd96875ecacd7e652d06ff100fa4f7fca63ba2688d48b122bf03c8dbd08ad2b

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\wEN1bzsOyy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\wEN1bzsOyy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\wEN1bzsOyy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/308-86-0x0000000003960000-0x0000000004A8C000-memory.dmp

Filesize
17.2MB

Download
memory/308-73-0x0000000003960000-0x0000000004A8C000-memory.dmp

Filesize
17.2MB

Download
memory/1112-55-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1112-100-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1112-68-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1112-54-0x0000000074D61000-0x0000000074D63000-memory.dmp

Filesize
8KB

Download
memory/2044-78-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/2044-77-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/2044-87-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/2044-88-0x0000000001C80000-0x0000000002DAC000-memory.dmp

Filesize
17.2MB

Download
memory/2044-89-0x0000000001C80000-0x0000000002DAC000-memory.dmp

Filesize
17.2MB

Download
memory/2044-90-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/2044-94-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/2044-76-0x0000000001C80000-0x0000000002DAC000-memory.dmp

Filesize
17.2MB

Download
memory/2044-75-0x0000000001C80000-0x0000000002DAC000-memory.dmp

Filesize
17.2MB

Download
memory/2044-99-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/2044-74-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download